AquaSnap® 30RAP010-150 Air-Cooled Chillers and

30RAP011-060 Air-Cooled Chillers with

Greenspeed® Intelligence
with Puron® Refrigerant (R-410A)
50/60 Hz

Controls, Start-Up, Operation,

Service, and Troubleshooting
CONTENTS • SLOW CHANGE OVERRIDE
Head Pressure Control . . . . . . . . . . . . . . . . . . . . . . .34
Page
• MOTORMASTER® V OPTION
SAFETY CONSIDERATIONS . . . . . . . . . . . . . . . . . . . 2
High-Efficiency Variable Condenser Fans . . . . . . . .37
GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
• 30RAP011-060 WITH GREENSPEED® INTELLIGENCE
Conventions Used in This Manual . . . . . . . . . . . . . . . 4 • FAN DRIVE OPERATION
Basic Controls Usage . . . . . . . . . . . . . . . . . . . . . . . . . 4 Operation of Machine Based on Control Method and
• SCROLLING MARQUEE DISPLAY Cooling Set Point Selection Settings . . . . . . . . .38
• ACCESSORY NAVIGATOR™ DISPLAY MODULE • OCCUPANCY SCHEDULE
CONTROLS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 • CCN CONTROL
General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Cooling Set Point Select . . . . . . . . . . . . . . . . . . . . . .39
Main Base Board (MBB) . . . . . . . . . . . . . . . . . . . . . . 26 • SINGLE
Energy Management Module (EMM) . . . . . . . . . . . . 27 • DUAL SWITCH
Current Sensor Board (CSB) . . . . . . . . . . . . . . . . . . 27 • DUAL CCN OCCUPIED
Auxiliary (AUX) Board . . . . . . . . . . . . . . . . . . . . . . . . 27 • 4 TO 20 MA INPUT
• CONFIGURATION SET POINT LIMITS
Electronic Expansion Valve (EXV) Board . . . . . . . . 27
Ice Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Compressor Expansion Board (CXB) . . . . . . . . . . . 27
Cooling Set Point (4 to 20 mA) . . . . . . . . . . . . . . . . .39
Enable/Off/Remote Control Switch . . . . . . . . . . . . . 27
Low Sound Mode Operation . . . . . . . . . . . . . . . . . . .40
Emergency On/Off Switch . . . . . . . . . . . . . . . . . . . . 27
Heating Operation . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Board Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Service Test . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
Control Module Communication . . . . . . . . . . . . . . . 27
Optional Factory-Installed Hydronic Package . . . .41
• RED LED
• GREEN LED Cooler Pump Control . . . . . . . . . . . . . . . . . . . . . . . . .41
• YELLOW LED Cooler Pump Operation . . . . . . . . . . . . . . . . . . . . . . .41
Carrier Comfort Network® (CCN) Interface . . . . . . . 28 Cooler Pump Sequence of Operation . . . . . . . . . . .41
Alarm Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 • NO INTEGRAL PUMP — SINGLE EXTERNAL PUMP
• ALARM ROUTING CONTROL CONTROL
• ALARM EQUIPMENT PRIORITY • NO INTEGRAL PUMP — DUAL EXTERNAL PUMP
• COMMUNICATION FAILURE RETRY TIME CONTROL
• RE-ALARM TIME • SINGLE INTEGRAL PUMP CONTROL
• ALARM SYSTEM NAME • DUAL INTEGRAL PUMP CONTROL
Sensors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Configuring and Operating Dual Chiller Control . .43
• COOLER LEAVING FLUID SENSOR Temperature Reset . . . . . . . . . . . . . . . . . . . . . . . . . .43
• COOLER ENTERING FLUID SENSOR Demand Limit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .49
• COMPRESSOR RETURN GAS TEMPERATURE • DEMAND LIMIT (2-STAGE SWITCH CONTROLLED)
SENSOR • EXTERNALLY POWERED DEMAND LIMIT 
• OUTDOOR-AIR TEMPERATURE SENSOR (OAT) (4 TO 20 MA CONTROLLED)
• DISCHARGE TEMPERATURE THERMISTOR (DTT) • DEMAND LIMIT (CCN LOADSHED CONTROLLED)
• REMOTE SPACE TEMPERATURE SENSOR OR DUAL Digital Scroll Option . . . . . . . . . . . . . . . . . . . . . . . . .49
LEAVING WATER TEMPERATURE SENSOR • DIGITAL SCROLL OPERATION
Energy Management Module . . . . . . . . . . . . . . . . . . 30 • DIGITAL COMPRESSOR CONFIGURATION
Loss-of-Cooler Flow Protection . . . . . . . . . . . . . . . . 31 PRE-START-UP . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Electronic Expansion Valves (EXVs) . . . . . . . . . . . . 31 System Check . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .51
Capacity Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31 START-UP AND OPERATION . . . . . . . . . . . . . . . . . .52
• MINUTES LEFT FOR START Crankcase Heaters . . . . . . . . . . . . . . . . . . . . . . . . . . .52
• MINUTES OFF TIME Actual Start-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .52
• LEAD/LAG DETERMINATION
• LOADING SEQUENCE SELECT Check Refrigerant Charge . . . . . . . . . . . . . . . . . . . . .52
• LOW AMBIENT LOCKOUT Charge Adjustment for Brine Operation . . . . . . . . .52
• CAPACITY CONTROL OVERRIDES Operating Limitations . . . . . . . . . . . . . . . . . . . . . . . .52

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300229-01 Printed in U.S.A. Form 30RAP-8T Pg 1 3-23 Replaces: 30RAP-7T
• COOLER FLOW RATES AND LOOP VOLUMES • PUMP MODIFICATIONS AND IMPELLER TRIMMING
• LOW-AMBIENT OPERATION • RESET OF CHILLER WATER FLOW
• VOLTAGE — ALL UNITS • CHANGING OF PUMP SEALS
OPERATION SEQUENCE . . . . . . . . . . . . . . . . . . . . . 54 • VFD OPERATION
SERVICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 MAINTENANCE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 78
Electronic Components . . . . . . . . . . . . . . . . . . . . . . 54 Recommended Maintenance Schedule . . . . . . . . . 78
• CONTROL COMPONENTS • ROUTINE:
Electronic Expansion Valve (EXV) . . . . . . . . . . . . . . 54 • EVERY MONTH:
• EVERY 3 MONTHS (FOR ALL MACHINES):
EXV Troubleshooting Procedure . . . . . . . . . . . . . . . 55 • EVERY 6 MONTHS:
• FIELD SERVICING INSTRUCTIONS • EVERY 12 MONTHS (FOR ALL MACHINES):
• EXV REPLACEMENT (ALL SIZES) CONDENSER COIL MAINTENANCE AND CLEANING
Compressor Replacement . . . . . . . . . . . . . . . . . . . . 58 RECOMMENDATIONS . . . . . . . . . . . . . . . . . . . . . 78
Crankcase Heater . . . . . . . . . . . . . . . . . . . . . . . . . . . 59 Control Box Maintenance . . . . . . . . . . . . . . . . . . . . 78
Cooler . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . 78
• BRAZED-PLATE COOLER HEAT EXCHANGER Complete Unit Stoppage and Restart . . . . . . . . . . . 78
REPLACEMENT • GENERAL POWER FAILURE
• BRAZED-PLATE COOLER HEAT EXCHANGER • UNIT ENABLE-OFF-REMOTE CONTROL SWITCH IS
CLEANING OFF
Oil Charge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 • CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN
• ADD OIL • OPEN 24-V CONTROL CIRCUIT BREAKER(S)
MCHX Coil Cleaning Instructions . . . . . . . . . . . . . . 61 • COOLING LOAD SATISFIED
• REMOVE SURFACE LOADED FIBERS • THERMISTOR FAILURE
• PERIODIC CLEAN WATER RINSE • LOW SATURATED SUCTION
• ROUTINE CLEANING OF COIL SURFACES • COMPRESSOR SAFETIES
• TOTALINE INDOOR AND OUTDOOR COIL CLEANER Motor Overload Protection . . . . . . . . . . . . . . . . . . . 88
INSTRUCTIONS • COPELAND COMPRESSORS MODELS WITH
Round Tube Plate Fin (RTPF) Condenser Coil ELECTRICAL CODE TF (010-090)
Maintenance and Cleaning Recommendations . 62 • COPELAND COMPRESSORS MODELS WITH
• REMOVE SURFACE LOADED FIBERS ELECTRICAL CODE “TW” OR “TE” (010-090) OR
• PERIODIC CLEAN WATER RINSE DANFOSS COMPRESSOR (100-150)
• ROUTINE CLEANING OF COIL SURFACES Alarms and Alerts . . . . . . . . . . . . . . . . . . . . . . . . . . 94
Check Refrigerant Feed Components . . . . . . . . . . . 63 • COMPRESSOR FAILURE ALERTS
• FILTER DRIER • POSSIBLE CAUSES
• MOISTURE-LIQUID INDICATOR • POSSIBLE CAUSES
• MINIMUM LOAD VALVE APPENDIX A — DISPLAY TABLES . . . . . . . . . . . . . 99
• PRESSURE RELIEF DEVICES APPENDIX B — CCN TABLES . . . . . . . . . . . . . . . 116
Check Unit Safeties . . . . . . . . . . . . . . . . . . . . . . . . . . 63 APPENDIX C — FACTORY SETTINGS FOR PUMP
AND MANUAL STARTERS . . . . . . . . . . . . . . . . 128
• HIGH-PRESSURE SWITCH APPENDIX D — BACNET COMMUNICATION . . . 129
• PRESSURE TRANSDUCERS
APPENDIX E — MAINTENANCE SUMMARY
• COOLER FREEZE-UP PROTECTION AND LOG SHEETS . . . . . . . . . . . . . . . . . . . . . . . 138
• HEATER CABLE INDEX . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 141
• WINTER SHUTDOWN
Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64 START-UP CHECKLIST FOR 30RAP LIQUID 
CHILLER. . . . . . . . . . . . . . . . . . . . . . . . . . . . . CL-1
• REPLACING THERMISTORS (EWT, LWT, RGT)
• THERMISTOR/TEMPERATURE SENSOR CHECK
Pressure Transducers . . . . . . . . . . . . . . . . . . . . . . . . 70 SAFETY CONSIDERATIONS
• TROUBLESHOOTING Installing, starting up, and servicing this equipment can be hazard-
Chilled Water Flow Switch . . . . . . . . . . . . . . . . . . . . 70 ous due to system pressures, electrical components, and equip-
• FLOW SWITCH SET POINT ADJUSTMENT ment location (roof, elevated structures, mechanical rooms, etc.).
• FLOW SWITCH PARAMETER SETTING Only trained, qualified installers and service mechanics should in-
stall, start up, and service this equipment.
Strainer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Condenser Fans . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71 When working on this equipment, observe precautions in the liter-
ature, and on tags, stickers, and labels attached to the equipment,
• METAL (VALUE SOUND) FANS and any other safety precautions that apply. Follow all safety
Motormaster® V Controller . . . . . . . . . . . . . . . . . . . . 72 codes. Wear safety glasses and work gloves. Use care in handling,
• MOTORASTER V CONTROLLER START-UP rigging, and setting this equipment, and in handling all electrical
FOLLOWING EXTENDED SHUTDOWN components.
• MOTORMASTER V CONTROLLER DIAGNOSTICS
• GENERAL OPERATION
• CONFIGURATION WARNING
• DRIVE PROGRAMMING
• EPM CHIP Electrical shock can cause personal injury and death. Shut off
• LOSS OF CCN COMMUNICATIONS all power to this equipment during installation. There may be
• REPLACING DEFECTIVE MODULES more than one disconnect switch. Tag all disconnect locations
Hydronic Package . . . . . . . . . . . . . . . . . . . . . . . . . . . 77 to alert others not to restore power until work is completed.
• PUMP PERFORMANCE CHECK

2
 WARNING CAUTION

DO NOT VENT refrigerant relief valves within a building. Refrigerant charge must be removed slowly to prevent loss of
Outlet from relief valves must be vented outdoors in accor- compressor oil that could result in compressor failure.
dance with the latest edition of ANSI/ASHRAE (American
National Standards Institute/American Society of Heating,
Refrigeration and Air-Conditioning Engineers) 15 (Safety CAUTION
Code for Mechanical Refrigeration). The accumulation of
refrigerant in an enclosed space can displace oxygen and cause
asphyxiation. Provide adequate ventilation in enclosed or low This unit uses a microprocessor control system. Do not short
overhead areas. Inhalation of high concentrations of vapor is or jumper between terminations on circuit boards or modules;
harmful and may cause heart irregularities, unconsciousness, control or board failure may result.
or death. Misuse can be fatal. Vapor is heavier than air and Be aware of electrostatic discharge (static electricity) when
reduces the amount of oxygen available for breathing. Product handling or making contact with circuit boards or module con-
causes eye and skin irritation. Decomposition products are nections. Always touch a chassis (grounded) part to dissipate
hazardous. body electrostatic charge before working inside control center.
Use extreme care when handling tools near boards and when
connecting or disconnecting terminal plugs. Circuit boards can
WARNING easily be damaged. Always hold boards by the edges and
avoid touching components and connections.
DO NOT USE TORCH to remove any component. System This equipment uses, and can radiate, radio frequency energy.
contains oil and refrigerant under pressure. If not installed and used in accordance with the instruction
To remove a component, wear protective gloves and goggles manual, it may cause interference to radio communications. It
and proceed as follows: has been tested and found to comply with the limits for a Class
A computing device pursuant to International Standard in
a. Shut off electrical power to unit. North America EN61000-2/3 which are designed to provide
b. Recover refrigerant to relieve all pressure from system reasonable protection against such interference when operated
using both high-pressure and low pressure ports. in a commercial environment. Operation of this equipment in a
c. Traces of vapor should be displaced with nitrogen and residential area is likely to cause interference, in which case
the work area should be well ventilated. Refrigerant in the user, at his own expense, will be required to take whatever
contact with an open flame produces toxic gases. measures may be required to correct the interference.
d. Cut component connection tubing with tubing cutter and Always store and transport replacement or defective boards in
remove component from unit. Use a pan to catch any oil anti-static shipping bag.
that may come out of the lines and as a gage for how
much oil to add to the system.
e. Carefully unsweat remaining tubing stubs when neces- CAUTION
sary. Oil can ignite when exposed to torch flame.
Failure to follow these procedures may result in personal To prevent potential damage to heat exchanger, always run
injury or death. fluid through heat exchanger when adding or removing refrig-
erant charge. Use appropriate brine solutions in cooler fluid
loop to prevent the freezing of brazed plate heat exchanger,
optional hydronic section, and/or interconnecting piping when
CAUTION the equipment is exposed to temperatures below 32°F (0°C).
Proof of flow switch and strainer are factory installed on all
DO NOT re-use compressor oil or any oil that has been models. Do NOT remove power from this chiller during winter
exposed to the atmosphere. Dispose of oil per local codes and shutdown periods without taking precaution to remove all
regulations. DO NOT leave refrigerant system open to air any water from heat exchanger and optional hydronic system. Fail-
longer than the actual time required to service the equipment. ure to properly protect the system from freezing may constitute
Seal circuits being serviced and charge with dry nitrogen to abuse and may void warranty.
prevent oil contamination when timely repairs cannot be com-
pleted. Failure to follow these procedures may result in dam-
age to equipment. CAUTION

Puron® refrigerant (R-410A) systems operate at higher pres-

CAUTION sures than standard R-22 systems. Do not use R-22 service
equipment or components on Puron refrigerant equipment. If
Compressors and optional hydronic system pumps require service equipment is not rated for Puron refrigerant, equipment
specific rotation. For non-HEVCF (high-efficiency variable damage or personal injury may result.
condenser fan) units, test condenser fan(s) first to ensure
proper phasing. Swap any two incoming power leads to cor-
rect condenser fan rotation before starting any other motors.
For HEVCF units, check to ensure the supply power phase
rotation is clockwise A-B-C (L1-L2-L3).

3
 GENERAL has up and down arrow keys, an ENTER key, and an ESCAPE
This publication contains Controls, Start-Up, Operation, Service, key. These keys are used to navigate through the different levels of
and Troubleshooting information for the AquaSnap® 30RAP air- the display structure. Press the ESCAPE key until the highest op-
cooled chillers. See Table 1. These chillers are equipped with erating level is displayed to move through the top 11 mode levels
ComfortLink controls and electronic expansion valves (EXVs). indicated by LEDs (light-emitting diodes) on the left side of the
display. See Fig. 1 and Table 2.
Conventions Used in This Manual
The following conventions for discussing configuration points for
the local display (scrolling marquee or Navigator™ accessory) MODE
will be used in this manual. Run Status
Service Test
Point names will be written with the mode name first, then any Temperature

sub-modes, then the point name, each separated by an arrow sym- Pressures
Setpoints
bol (. Names will also be shown in bold and italics. As an ex- Inputs Alarm Status

ample, the Lead/Lag Circuit Select Point, which is located in the Outputs
Configuration
ESCAPE ENTER
Configuration mode, Option sub-mode, would be written as Con- Time Clock

figuration OPT2LLCS. Operating Modes

Alarms

This path name will show the user how to navigate through the lo-
cal display to reach the desired configuration. The user would Fig. 1 — Scrolling Marquee Display
scroll through the modes and sub-modes using the and
keys. The arrow symbol in the path name represents pressing Once within a mode or sub-mode, pressing the ENTER and
ENTER to move into the next level of the menu structure. ESCAPE keys simultaneously will put the scrolling marquee
display into expanded text mode where the full meaning of all
When a value is included as part of the path name, it will be shown sub-modes and items and their values can be displayed for the cur-
at the end of the path name after an equals sign. If the value rep-
resents a configuration setting, an explanation will be shown in pa- rent selection. Press the ENTER and ESCAPE keys to return
rentheses after the value. As an example, Configura- the scrolling marquee display to its default menu of rotating dis-
tionOPT2LLCS = 1 (Automatic). play items (those items in Run StatusVIEW). In addition, the
password will be disabled, requiring that it be entered again before
Pressing the ESCAPE and ENTER keys simultaneously will changes can be made to password protected items. Press the
scroll an expanded text description of the point name or value
across the display. The expanded description is shown in the local ESCAPE key to exit out of the expanded text mode.
display tables but will not be shown with the path names in text. NOTE: When the Language Selection (Configuration
The CCN (Carrier Comfort Network®) point names are also refer- DISPLANG), variable is changed, all appropriate display ex-
enced in the local display tables for users configuring the unit with pansions will immediately change to the new language. No pow-
CCN software instead of the local display. The CCN tables are lo- er-off or control reset is required when reconfiguring languages.
cated in Appendix B of the manual. When a specific item is located, the item name alternates with the
value. Press the ENTER key at a changeable item and the value
Table 1 — Unit Sizes
will be displayed. Press ENTER again and the value will begin
UNIT NOMINAL CAPACITY (TONS) to flash indicating that the value can be changed. Use the up and
30RAP010 10 down arrow keys to change the value, and confirm the value by
30RAP011 10 pressing the ENTER key.
30RAP015 14
Changing item values or testing outputs is accomplished in the
30RAP016 14
30RAP018 16
same manner. Locate and display the desired item. Press ENTER
30RAP020 19 so that the item value flashes. Use the arrow keys to change the
30RAP025 24 value or state and press the ENTER key to accept it. Press the
30RAP030 28 ESCAPE key to return to the next higher level of structure. Re-
30RAP035 34 peat the process as required for other items.
30RAP040 39
Items in the Configuration and Service Test modes are password
30RAP045 43 protected. The words “PASS” and “WORD” will alternate on the
30RAP050 48 display when required. The default password is 1111. Press
30RAP055 52
ENTER and the 1111 password will be displayed. Press
30RAP060 56
30RAP070 69 ENTER again and the first digit will begin to flash. Use the ar-
30RAP080 77 row keys to change the number and press ENTER to accept the
30RAP090 85 digit. Continue with the remaining digits of the password. The
30RAP100 99 password can only be changed through CCN operator interface
30RAP115 112 software such as ComfortWORKS™, ComfortVIEW™, and Ser-
30RAP130 126 vice Tool. Configuration value cannot be changed while the unit is
30RAP150 140 enabled. Remote Control-Off-Enable must be in the Off position
in order to change any configuration mode.
Basic Controls Usage See Table 2 and Appendix A for further details. See Table 3 for a
SCROLLING MARQUEE DISPLAY description of operating modes.
The scrolling marquee display is the standard interface display to
the ComfortLink Control System for 30RAP units. The display

4
 Table 2 — Scrolling Marquee Display Menu Structurea,b
RUN SERVICE SET TIME OPERATING
MODE TEMPERATURES PRESSURES INPUTS OUTPUTS CONFIGURATION ALARMS
STATUS TEST POINTS CLOCK MODES
Auto
View of Service Ent and Leave Unit Pressures Cooling General General Display Time of Modes Current
Test Mode Temps Ckt A Setpoints Inputs Outputs Configuration Day
Run Status (MODE) (CRNT)
(TEST) (UNIT) (PRC.A) (COOL) (GEN.I) (GEN.O) (DISP) (TIME)
(VIEW)
Unit Run Head Outputs Month,
Outputs Temperatures Pressures Circuit Unit Reset
Hour and Pressure Circuit A Date, Day,
and Pumps Ckt A Ckt B Inputs Configuration Alarms
Start Setpoint EXV and Year
(OUTS) (CIR.A) (PRC.B) (CRCT) (UNIT) (RCRN)
(RUN) (HEAD) (A.EXV) (DATE)
Compressor Circuit A Brine Outputs Daylight
Temperatures 4-20mA Unit Options 1 Alarm
Run Hours Comp Freeze Circuit B Savings
Ckt B Inputs Hardware History
Test Setpoint EXV Time
(HOUR) (CIR.B) (4-20) (OPT1) (HIST)
(CMPA) (FRZ) (B.EXV) (DST)
Compressor Circuit B Outputs Unit Options 2 Local
Comp Holiday
Starts Circuit A Controls
(STRT) Test (CIR.A) (OPT2) Schedules
(CMPB) (HOL.L)
Preventive Outputs CCN Network Schedule
Maintenance Circuit B Configuration Number
(PM) (CIR.B) (CCN) (SCH.N)
Local
SUB-MODE Software Cir. A EXV Occupancy
Version Configuration
Schedule
(VERS) (EXV.A)
(SCH.L)
Cir. B EXV Schedule
Configuration Override
(EXV.B) (OVR)
Motormaster
Configuration
(MM)
Reset Cool Temp
(RSET)
Set Point and
Ramp Load
(SLCT)
Service
Configuration
(SERV)
Broadcast
Configuration
(BCST)

NOTE(S):
a. Throughout this text, the location of items in the menu structure will be described in the following format:
Item Expansion (Mode NameSub-mode NameITEM)
For example, using the language selection item:
Language Selection (ConfigurationDISPLANG)
b. If the unit has a single circuit, the Circuit B items will not appear in the display, except the ability to configure circuit B will be displayed.
LEGEND
Ckt — Circuit

5
 Table 3 — Operating Modes
MODE NO. ITEM EXPANSION DESCRIPTION
01 CSM CONTROLLING CHILLER Chillervisor System Manager (CSM) is controlling the chiller.
02 WSM CONTROLLING CHILLER Water System Manager (WSM) is controlling the chiller.
03 MASTER/SLAVE CONTROL Dual Chiller control is enabled.
RAMP LOAD LIMITED Ramp load (pull-down) limiting in effect. In this mode, the rate at which leaving fluid temperature is
dropped is limited to a predetermined value to prevent compressor overloading. See Cooling Ramp
05
Loading (ConfigurationSLCTCRMP). The pull-down limit can be modified, if desired, to any
rate from 0.2°F to 2°F (0.1°to 1°C)/minute.
TIMED OVERRIDE IN EFFECT Timed override is in effect. This is a 1 to 4 hour temporary override of the programmed schedule,
06 forcing unit to Occupied mode. Override can be implemented with unit under Local (Enable) or CCN
(Carrier Comfort Network®) control. Override expires after each use.
LOW COOLER SUCTION TEMPA Circuit A cooler Freeze Protection mode. At least one compressor must be on, and the Saturated
Suction Temperature is not increasing greater than 1.1°F (0.6°C) in 10 seconds. If the saturated
suction temperature is less than the Brine Freeze Point (Set PointsFRZ BR.FZ) minus 6°F
07 (3.4°C) and less than the leaving fluid temperature minus 14°F (7.8°C) for 2 minutes, a stage of
capacity will be removed from the circuit. Or, If the saturated suction temperature is less than the
Brine Freeze Point minus 14°F (7.8°C), for 90 seconds, a stage of capacity will be removed from
the circuit. The control will continue to decrease capacity as long as either condition exists.
LOW COOLER SUCTION TEMPB Circuit B cooler Freeze Protection mode. At least one compressor must be on, and the Saturated
Suction Temperature is not increasing greater than 1.1°F (0.6°C) in 10 seconds. If the saturated
suction temperature is less than the Brine Freeze Point (Set PointsFRZ BR.FZ) minus 6°F
08 (3.4°C) and less than the leaving fluid temperature minus 14°F (7.8°C) for 2 minutes, a stage of
capacity will be removed from the circuit. If the saturated suction temperature is less than the Brine
Freeze Point minus 14°F (7.8°C) for 90 seconds, a stage of capacity will be removed from the cir-
cuit. The control will continue to decrease capacity as long as either condition exists.
SLOW CHANGE OVERRIDE Slow change override is in effect. The leaving fluid temperature is close to and moving towards the
09 control point.
10 MINIMUM OFF TIME ACTIVE Chiller is being held off by Minutes Off Time (ConfigurationOPT2DELY).
DUAL SETPOINT Dual Set Point mode is in effect. Chiller controls to Cooling Set Point 1 (Set PointsCOOL CSP.1)
13 during occupied periods and Cooling Set Point 2 (Set PointsCOOLCSP.2) during unoccupied
periods.
TEMPERATURE RESET Temperature reset is in effect. In this mode, chiller is using temperature reset to adjust leaving fluid
14 set point upward and is currently controlling to the modified set point. The set point can be modified
based on return fluid, outdoor-air-temperature, space temperature, or 4 to 20 mA signal.
DEMAND/SOUND LIMITED Demand limit is in effect. This indicates that the capacity of the chiller is being limited by demand
15 limit control option. Because of this limitation, the chiller may not be able to produce the desired
leaving fluid temperature. Demand limit can be controlled by switch inputs or a 4 to 20 mA signal.
COOLER FREEZE PROTECTION Cooler fluid temperatures are approaching the Freeze point (see Alarms and Alerts section for defi-
16
nition). The chiller will be shut down when either fluid temperature falls below the Freeze point.
LOW TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is negative and decreasing
17 faster than –0.5°F per minute. Error between leaving fluid and control point exceeds fixed amount.
Control will automatically unload the chiller if necessary.
HIGH TEMPERATURE COOLING Chiller is in Cooling mode and the rate of change of the leaving fluid is positive and increasing. Error
18 between leaving fluid and control point exceeds fixed amount. Control will automatically load the chiller
if necessary to better match the increasing load.
MAKING ICE Chiller is in an unoccupied mode and is using Cooling Set Point 3 (Set PointsCOOLCSP.3)
19 to make ice. The ice done input to the Energy Management Module (EMM) is open.
20 STORING ICE Chiller is in an unoccupied mode and is controlling to Cooling Set Point 2 (Set PointsCOOL
CSP.2). The ice done input to the Energy Management Module (EMM) is closed.
HIGH SCT CIRCUIT A Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than the cal-
21 culated maximum limit. No additional stages of capacity will be added. Chiller capacity may be reduced
if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature.
HIGH SCT CIRCUIT B Chiller is in a Cooling mode and the Saturated Condensing Temperature (SCT) is greater than the cal-
22 culated maximum limit. No additional stages of capacity will be added. Chiller capacity may be reduced
if SCT continues to rise to avoid high-pressure switch trips by reducing condensing temperature.
MINIMUM COMP ON TIME Cooling load may be satisfied, however control continues to operate compressor to ensure proper oil
23
return. May be an indication of oversized application, low fluid flow rate or low loop volume.
PUMP OFF DELAY TIME Cooling load is satisfied, however cooler pump continues to run for the number of minutes set by the
24 configuration variable Cooler Pump Shutdown Delay (ConfigurationOPT1PM.DY).
25 LOW SOUND MODE Chiller operates at higher condensing temperature and/or reduced capacity to minimize overall unit
noise during evening/night hours (ConfigurationOPT2LS.MD).
AO CIRCUIT A TRIO OIL MGMT Additional stage of capacity is added if circuit operates with only one compressor for an accumu-
BO CIRCUIT B TRIO OIL MGMT lated time of 60 minutes.
OAT LOCKOUT IN EFFECT Chiller will not start due to OAT less than OAT lockout temperature set point (Set PointsCOOL
OL OAT.L).

6
ACCESSORY NAVIGATOR™ DISPLAY MODULE Pressing ENTER will cause the “OFF” to flash. Use the up or
The Navigator module provides a mobile user interface to the down arrow to change “OFF” to “ON”. Pressing ENTER will il-
ComfortLink control system, which is only available as a field-in-
stalled accessory. The display has up and down arrow keys, an luminate all LEDs and display all pixels in the view screen. Press-
ENTER key, and an ESCAPE key. These keys are used to nav- ing ENTER and ESCAPE simultaneously allows the user to
igate through the different levels of the display structure. Press the adjust the display contrast. Use the up or down arrows to adjust
the contrast. The screen’s contrast will change with the adjust-
ESCAPE key until “Select a Menu Item” is displayed to move
ment. Press ENTER to accept the change. The Navigator module
through the top 11 mode levels indicated by LEDs on the left side
of the display. See Fig. 2. will keep this setting as long as it is plugged in to the LEN (local
equipment network) bus.
Once within a Mode or sub-mode, a “>” indicates the currently se-
Adjusting the Backlight Brightness
lected item on the display screen. Pressing the ENTER and
The backlight of the display can be adjusted to suit ambient condi-
ESCAPE keys simultaneously will put the Navigator module tions. The factory default is set to the highest level. To adjust the
into expanded text mode where the full meaning of all sub-modes backlight of the Navigator module, press the ESCAPE key until
and items and their values can be displayed. Pressing the the display reads, “Select a menu item”. Using the arrow keys
ENTER and ESCAPE keys when the display says “Select move to the Configuration mode. Press ENTER to obtain access
Menu Item” (Mode LED level) will return the Navigator module to this mode. The display will read:
to its default menu of rotating display items (those items in Run
StatusVIEW). In addition, the password will be disabled, re- > TEST OFF
quiring that it be entered again before changes can be made to METR OFF
password protected items. Press the ESCAPE key to exit out of LANG ENGLISH
the expanded text mode.
Pressing ENTER will cause the “OFF” to flash. Use the up or
NOTE: When the Language Selection (Configuration 
DISPLANG) variable is changed, all appropriate display ex- down arrow keys to change “OFF” to “ON”. Pressing ENTER
pansions will immediately change to the new language. No pow- will illuminate all LEDs and display all pixels in the view screen.
er-off or control reset is required when reconfiguring languages. Pressing the up and down arrow keys simultaneously allows the
When a specific item is located, the item name appears on the left user to adjust the display brightness. Use the up or down arrow
of the display, the value will appear near the middle of the display, keys to adjust screen brightness. Press ENTER to accept the
and the units (if any) will appear on the far right of the display. change. The Navigator module will keep this setting as long as it
Press the ENTER key at a changeable item and the value will be- is plugged in to the LEN bus.
gin to flash. Use the up and down arrow keys to change the value,
and confirm the value by pressing the ENTER key.
Com
fortL
ink

Changing item values or testing outputs is accomplished in the

same manner. Locate and display the desired item. Press ENTER
so that the item value flashes. Use the arrow keys to change the MOD
E
Run
Status
Alarm
Status

value or state and press the ENTER key to accept it. Press the
Servic
e Tes
t
Tem
peratu
res
Pressu
res
Setpo
ints
Inputs

ESCAPE key to return to the next higher level of structure. Re-

Outpu
ts
Config
uration
Time
Clock
Opera ESC

peat the process as required for other items.

ting
Modes
Alarm
s

Items in the Configuration and Service Test modes are password

ENTE
R

protected. The words Enter Password will be displayed when

required, with 1111 also being displayed. The default password is
1111. Use the arrow keys to change the number and
press ENTER to enter the digit. Continue with the remaining
digits of the password. The password can only be changed through Fig. 2 — Accessory Navigator™ Display Module
CCN operator interface software such as ComfortWORKS,
ComfortVIEW, and Service Tool. CONTROLS
Adjusting the Contrast
The contrast of the display can be adjusted to suit ambient condi- General
tions. To adjust the contrast of the Navigator module, press the The 30RAP air-cooled scroll chillers contain the ComfortLink
ESCAPE key until the display reads, “Select a menu item.” Us- electronic control system that controls and monitors all operations
of the chiller.
ing the arrow keys move to the Configuration mode. Press
The control system is composed of several components as listed in
ENTER to obtain access to this mode. The display will read: sections starting on page 26. See Fig. 3-5 for typical control box
> TEST OFF drawings. See Fig. 6-19 for wiring. Table 4 lists the drawings by
METR OFF unit size.
LANG ENGLISH

7
 Table 4 — Component, Power, and Control Drawings
UNIT DESCRIPTION LOCATION
Typical Control Box Fig. 3, page 9
30RAP010 Power Wiring Schematic Fig. 6, page 12
Control Wiring Schematic Fig. 7, page 13
Typical Control Box Fig. 3, page 9
30RAP011 Power Wiring Schematic Fig. 8, page 14
Control Wiring Schematic Fig. 9, page 15
Typical Control Box Fig. 3, page 9
30RAP015 Power Wiring Schematic Fig. 6, page 12
Control Wiring Schematic Fig. 7, page 13
Typical Control Box Fig. 3, page 9
30RAP016 Power Wiring Schematic Fig. 8, page 14
Control Wiring Schematic Fig. 9, page 15
Typical Control Box Fig. 3, page 9
30RAP018 Power Wiring Schematic Fig. 10, page 16
Control Wiring Schematic Fig. 11, page 17
Typical Control Box Fig. 3, page 9
30RAP020 Power Wiring Schematic Fig. 10, page 16
Control Wiring Schematic Fig. 11, page 17
Typical Control Box Fig. 3, page 9
30RAP025 Power Wiring Schematic Fig. 10, page 16
Control Wiring Schematic Fig. 11, page 17
Typical Control Box Fig. 3, page 9
30RAP030 Power Wiring Schematic Fig. 10, page 16
Control Wiring Schematic Fig. 11, page 17
Typical Control Box Fig. 4, page 10
30RAP035 Power Wiring Schematic Fig. 12, page 18
Control Wiring Schematic Fig. 13, page 19
Typical Control Box Fig. 4, page 10
30RAP040 Power Wiring Schematic Fig. 12, page 18
Control Wiring Schematic Fig. 13, page 19
Typical Control Box Fig. 4, page 10
30RAP045 Power Wiring Schematic Fig. 12, page 18
Control Wiring Schematic Fig. 13, page 19
Typical Control Box Fig. 4, page 10
30RAP050 Power Wiring Schematic Fig. 12, page 18
Control Wiring Schematic Fig. 13, page 19
Typical Control Box Fig. 4, page 10
30RAP055 Power Wiring Schematic Fig. 12, page 18
Control Wiring Schematic Fig. 13, page 19
Typical Control Box Fig. 4, page 10
30RAP060 Power Wiring Schematic Fig. 12, page 18
Control Wiring Schematic Fig. 13, page 19
Typical Control Box Fig. 5, page 11
30RAP070 Power Wiring Schematic Fig. 14, page 20
Control Wiring Schematic Fig. 15, page 21
Typical Control Box Fig. 5, page 11
30RAP080 Power Wiring Schematic Fig. 14, page 20
Control Wiring Schematic Fig. 15, page 21
Typical Control Box Fig. 5, page 11
30RAP090 Power Wiring Schematic Fig. 14, page 20
Control Wiring Schematic Fig. 15, page 21
Typical Control Box Fig. 5, page 11
30RAP100 Power Wiring Schematic Fig. 16, page 22
Control Wiring Schematic Fig. 17, page 23
Typical Control Box Fig. 5, page 11
30RAP115 Power Wiring Schematic Fig. 16, page 22
Control Wiring Schematic Fig. 17, page 23
Typical Control Box Fig. 5, page 11
30RAP130 Power Wiring Schematic Fig. 18, page 24
Control Wiring Schematic Fig. 19, page 25
Typical Control Box Fig. 5, page 11
30RAP150 Power Wiring Schematic Fig. 18, page 24
Control Wiring Schematic Fig. 19, page 25

8
9

NOTE 1:
FC1, FC2 ARE USED ON 018-030 ONLY.
FOR HEVCF OPTION,
TB2 WILL REPLACE FC1, FC2.
TB2 WILL BE LOCATED AT THE BOTTOM OF CONTROL BOX.

Fig. 3 — Typical Control Box for 30RAP010-030

10

Fig. 4 — Typical Control Box for 30RAP035-060

11

Fig. 5 — Typical Control Box for 30RAP070-150

 NOTE: Typical drawing shown. Refer to
unit wiring diagram label for specific unit.

Fig. 6 — Typical Wiring Schematic, 30RAP010,015 Units — Power Wiring

12
 NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 7 — Typical Wiring Schematic, 30RAP010,015 Units — Control Wiring

13
 NOTE: Typical drawing shown. Refer to 
unit wiring diagram label for specific unit.

Fig. 8 — Typical Wiring Schematic, 30RAP011,016 Units — Power Wiring

14
 NOTE: Typical drawing shown. Refer to 
unit wiring diagram label for specific unit.

Fig. 9 — Typical Wiring Schematic, 30RAP011,016 Units — Control Wiring

15
 TO COOLER, PUMP HEATER
SEE STANDARD OPERTION
HEATER DETAIL

NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 10 — Typical Wiring Schematic, 30RAP018-030 Units — Power Wiring

16
Fig. 11 — Typical Wiring Schematic, 30RAP018-030 Units — Control Wiring

17
 NOTE: Typical drawing shown. Refer to unit
wiring diagram label for specific unit.

Fig. 12 — Typical Wiring Schematic, 30RAP035-060 Units — Power Wiring

18
NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 13 — Typical Wiring Schematic, 30RAP035-060 Units — Control Wiring

19
 NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 14 — Typical Wiring Schematic, 30RAP070-090 Units — Power Wiring

20
 NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 15 — Typical Wiring Schematic, 30RAP070-090 Units — Control Wiring

21
 NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 16 — Typical Wiring Schematic, 30RAP100,115 Units — Power Wiring

22
 NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 17 — Typical Wiring Schematic, 30RAP100,115 Units — Control Wiring

23
 NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 18 — Typical Wiring Schematic, 30RAP130-150 Units — Power Wiring

24
 NOTE: Typical drawing shown. Refer to unit wiring diagram label for specific unit.

Fig. 19 — Typical Wiring Schematic, 30RAP130-150 Units — Control Wiring

25
 LEGEND FOR FIG. 3-19
ALMR — Alarm Relay FCB — Fan Circuit Breaker SW — Switch
AUX — Auxiliary FIOP — Factory-Installed Option TB — Terminal Block
BR — Boiler Relay FR — Fan Relay TNKR — Storage Tank Heater Relay
C — Contactor, Compressor FU — Fuse TRAN — Transformer
CB — Circuit Breaker FVFD — Fan Variable Frequency Drive UPC — Unitary Protocol Converter
CCB — Compressor Circuit Breaker GND — Ground VFD — Variable Frequency Drive
CH — Crankcase Heater HPS — High-Pressure Switch Terminal Block
CHC — Cooler/Pump Heater Contactor HR — Heat Relay
COMP — Compressor LON — Local Operating Network Terminal (Unmarked)
CSB — Current Sensor Board LVT — Low Voltage Terminal Block
CWFS — Chilled Water Flow Switch LWT — Leaving Water Temperature Terminal (Marked)
CWP — Chilled Water Pump MBB — Main Base Board
CXB — Compressor Expansion Board MLV — Minimum Load Valve Splice
DGS — Digital Scroll Compressor MM — Motormaster
DPT — Discharge Pressure Transducer MP — Motor Protector Factory Wiring
DTT — Discharge Temperature Thermistor MS — Manual Starter
DUS — Digital Unloader Solenoid NEC — National Electrical Code Field Wiring
EMM — Energy Management OAT — Outdoor-Air Thermistor
EWT — Entering Water Temperature OFM — Outdoor Fan Motor Accessory or Option Wiring
EXV — Electronic Expansion Valve RGT — Return Gas Thermistor
FB — Fuse Block SCCR — Short Circuit Current Rating To indicate common potential
FC — Fan Contactor SPT — Suction Pressure Transducer only; not to represent wiring.

Main Base Board (MBB) compressor current sensor board and other status switches. See
See Fig. 20. The MBB is the heart of the ComfortLink control sys- Tables 6 and 7. The MBB also controls several outputs. Relay out-
tem. It contains the major portion of operating software and con- puts controlled by the MBB are shown in Tables 8 and 9. Informa-
trols the operation of the machine. The MBB continuously moni- tion is transmitted between modules via a 3-wire communication
tors input/output channel information received from its inputs and bus or LEN (Local Equipment Network). The CCN (Carrier Com-
from all other modules. The MBB receives inputs from the dis- fort Network) bus is also supported. Connections to both LEN and
charge and suction pressure transducers and thermistors. See CCN buses are made at the LVT (low voltage terminal). See
Table 5. The MBB also receives the feedback inputs from each Fig. 20 and 21.

Red LED - Status

Green LED - LEN (Local Equipment Network) Yellow LED - CCN (Carrier Comfort Network)
Instance Jumper

CEPL130346-01

K11 K10 K9

K8 K7 K6 K5
J1 J2 Status

2 1
J3 LEN J10
J4

K4 K3 K2 K1
CCN

J5

J6

J7 J8 J9

Fig. 20 — Main Base Board

26
 Fig. 21 — CCN Wiring Diagram
Energy Management Module (EMM)
EMM is available as a factory-installed option or as a field-in-
stalled accessory. The EMM module receives 4 to 20 mA inputs
for the leaving fluid temperature reset, cooling set point and de-
mand limit functions. The EMM module also receives the switch
inputs for the field-installed 2-stage demand limit and ice done
functions. The EMM module communicates the status of all in-
puts with the MBB, and the MBB adjusts the control point, capac-
ity limit, and other functions according to the inputs received.
Current Sensor Board (CSB)
The CSB is used to monitor the status of the compressors by mea-
suring current and providing an analog input to the main base
board (MBB) or compressor expansion module (CXB).
Auxiliary (AUX) Board
The AUX board is used with the digital scroll option and the low
ambient head pressure option. It provides additional inputs and
outputs for digital scroll control along with analog outputs to con- Fig. 22 — Enable/Off/Remote Control Switch,
trol head pressure control fan speeds. See Tables 10 and 11. and Emergency On/Off Switch Locations
Electronic Expansion Valve (EXV) Board Board Addresses
The EXV board communicates with the MBB and directly con- The main base board (MBB) has a 3-position instance jumper that
trols expansion valves to maintain correct compressor superheat. must be set to “1.” The electronic expansion valve (EXV) board,
compressor expansion board (CXB), and energy management
Compressor Expansion Board (CXB) module (EMM) board have 4-position DIP switches. All switches
The CXB communicates with the MBB and directly controls addi- are set to “On” for these boards. The auxiliary board (AUX) has
tional compressors for contactors, cooler/pump heaters, and com- an 8-position DIP switch. Switches 2, 5, and 7 are set to “On.”
pressor crankcase heater relays for sizes 070-150.
Control Module Communication
Enable/Off/Remote Control Switch
RED LED
The Enable/Off/Remote Control switch (SW1) is a 3-position
switch used to control the chiller. When switched to the Enable Proper operation of the control boards can be visually checked by
position the chiller is under its own control. Move the switch to the looking at the red status LEDs. During initial power-up the LED
Off position to shut the chiller down. Move the switch to the Re- will signal a 1/2-second blink 3 times, followed by a pause. This
mote Control position and a field-installed dry contact can be used indicates that the processor is booting. If this pattern repeats, it is
to start the chiller. The contacts must be capable of handling a an indication that the control board is in a continuous reboot loop
24 vac, 50-mA load. In the Enable and Remote Control (dry con- and the board should be replaced. When operating correctly, the
tacts closed) positions, the chiller is allowed to operate and re- red status LEDs should be blinking in unison at a rate of once ev-
spond to the scheduling configuration, CCN configuration, and set ery 2 seconds. If the red LEDs are not blinking in unison, verify
point data. See Fig. 22. that correct power is being supplied to all modules. Be sure that
the main control is supplied with the current software. If neces-
Emergency On/Off Switch sary, reload current software. If the problem still persists, replace
The Emergency On/Off switch (SW2) should only be used when the control board. A red LED that is lit continuously or blinking at
it is required to shut the chiller off immediately. Power to the a rate of once per second or faster indicates that the control board
MBB, EMM, and marquee display is interrupted when this switch should be replaced.
is off and all outputs from these modules will be turned off. The
cooler and pump heaters are energized.

27
GREEN LED Table 9 — Output Relays (CXB)
The MBB has one green LED. The Local Equipment Network RELAY
(LEN) LED should always be blinking whenever power is on. All DESCRIPTION
NO.
other boards have a LEN LED which should be blinking whenev- K1 Energize Compressor Fan Contactor 4
er power is on. Check LEN connections for potential communica- K2 Crankcase Heater Relay Output, Circuit A
tion errors at the board J3 and/or J4 connectors. Communication K3 Cooler / Pump Heater
between modules is accomplished by a 3-wire sensor bus. These 3 K4 Crankcase Heater Relay Output, Circuit B
wires run in parallel from module to module. The J4 connector on K5 Energize Compressor B3 (070-150)
the MBB provides both power and communication directly to the K6 Energize Compressor A3 (080,090,115,130,150)
scrolling marquee display only. Table 10 — Inputs (AUX)
YELLOW LED
PIN
The MBB has one yellow LED. The Carrier Comfort Network NAME DESCRIPTION CONNECTION REF. VOLTAGE
POINT
(CCN) LED will blink during times of network communication.
Discharge
Table 5 — Thermistor Designations (MBB) DTT Temperature J6-1,2 5 vdc
Thermistor
PIN
THERMISTOR CONNECTION THERMISTOR INPUT
REF. Table 11 — Outputs (AUX)
VOLTAGE
POINT
Cooler Leaving Fluid PIN
LWT J8-13,14 (MBB) 4 vdc NAME DESCRIPTION CONNECTION REF. VOLTAGE
Temperature
POINT
Cooler Entering Fluid
EWT J8-11,12 (MBB) 4 vdc Minimum Load Valve
Temperature MLV-A J2-3,4 24 vac
(070-150)
RGTA J8-1,2 (MBB) Circuit A Return Gas 4 vdc Minimum Load Valve
Temperature MLV-B J2-5,6 24 vac
(070-150)
Circuit B (035-150
RGTB J8-3,4 (MBB) only) Return Gas 4 vdc DUS Digital Unloader Sole- J2-7,8 24 vac
Temperature noid
Outdoor-Air FC-5 Fan Contactor J3-1,2 24 vac
OAT J8-7,8 (MBB) Temperature 4 vdc (070-150)
Sensor Fan Contactor
FC-6 J3-3,4 24 vac
Accessory Remote (080-150)
SPT/DLWT J8-5,6 (MBB) Space Temperature 4 vdc MM-A Motormaster® Ckt A J4-1,2 2-10 vdc
LVT-22,23 Sensor or  MM-B Motormaster Ckt B J5-1,2 2-10 vdc
Dual LWT Sensor

Table 6 — Status Inputs (MBB) Carrier Comfort Network® (CCN) Interface

The 30RAP chiller units can be connected to the CCN if desired.
PIN The communication bus wiring is a shielded, 3-conductor cable
STATUS SWITCH CONNECTION REF. VOLTAGE
POINT with drain wire and is supplied and installed in the field. See
Chilled Water Pump 1, PM.F.1 J7-1,2 24 vac Table 12. The system elements are connected to the communica-
Chilled Water Pump 2, PM.F.2 J7-3,4 24 vac tion bus in a daisy chain arrangement. The positive pin of each
Remote On/Off LVT-13,14 24 vac system element communication connector must be wired to the
Cooler Flow Switch J7-9,10 24 vac positive pins of the system elements on either side of it. This is
Compressor Fault Signal, A1 J9-11,12 5 vdc also required for the negative and signal ground pins of each sys-
Compressor Fault Signal, A2 J9-5,6 5 vdc tem element. Wiring connections for CCN should be made at
Compressor Fault Signal, B1 J9-8,9 5 vdc LVT. Consult the CCN Contractor’s Manual for further informa-
Compressor Fault Signal, B2 J9-2,3 5 vdc tion. Refer to Fig. 21.
Table 7 — Status Inputs (CXB) NOTE: Conductors and drain wire must be 20 AWG (American
Wire Gage) minimum stranded, tinned copper. Individual conduc-
PIN tors must be insulated with PVC, PVC/nylon, vinyl, Teflon1, or
STATUS SWITCH CONNECTION REF. VOLTAGE
POINT
polyethylene. An aluminum/polyester 100% foil shield and an
Compressor Fault Signal, A3
outer jacket of PVC, PVC/nylon, chrome vinyl, or Teflon with a
(080,090,115,130,150)
J5-11,12 5 vdc minimum operating temperature range of –20°C to 60°C is re-
Compressor Fault Signal, B3 (070-
J5-8,9 5 vdc
quired. Wire manufactured by Alpha (2413 or 5463), American
150) (A22503), Belden (8772), or Columbia (02525) meets the above
Table 8 — Output Relays (MBB) mentioned requirements.
It is important when connecting to a CCN communication bus that
RELAY a color coding scheme be used for the entire network to simplify
DESCRIPTION
NO.
Energize Compressor A1 (010-050, 070-150)
the installation. It is recommended that red be used for the signal
K1 Energize Compressor A1 and Condenser Fan  positive, black for the signal negative, and white for the signal
Contactor 3 (055,060) ground. Use a similar scheme for cables containing different col-
K2 Energize Compressor A2 (all but 010, 015 60 Hz) ored wires.
K3 Energize Chilled Water Pump 1 Output
K4 Energize Chilled Water Pump 2 Output
At each system element, the shields of its communication bus ca-
Energize Compressor B1 (035-050, 070-150)
bles must be tied together. If the communication bus is entirely
K5 Energize Compressor B1 and Condenser Fan within one building, the resulting continuous shield must be con-
Contactor 3 (055,060) nected to a ground at one point only. If the communication bus ca-
K6 Energize Compressor B2 (035-150) ble exits from one building and enters another, the shields must be
K7 Alarm Relay connected to grounds at the lightning suppressor in each building
K8 Cooler/Pump Heater (010-060), Energize Condenser Fan Con- where the cable enters or exits the building (one point per building
tactor 3 (070-150)
only).
K9 Energize Condenser Fan Contactor 1 (018-150)
K10 Energize Condenser Fan Contactor 2 (018-150)
K11 Minimum Load Valve (010-060) 1. Third-party trademarks and logos are the property of their respective
owners.

28
To connect the unit to the network: ALARM EQUIPMENT PRIORITY
1. Turn off power to the control box. The ComfortVIEW software uses the equipment priority value
2. Cut the CCN wire and strip the ends of the red (+), white when sorting alarms by level. The purpose of the equipment prior-
(ground), and black (–) conductors. (Substitute appropriate ity value is to determine the order in which to sort alarms that have
colors for different colored cables.) the same level. A priority of 0 is the highest and would appear first
when sorted. A priority of 7 would appear last when sorted. For
3. Connect the red wire to (+) terminal on LVT of the plug, the example, if two chillers send out identical alarms, the chiller with
white wire to COM terminal, and the black wire to the (–) the higher priority would be listed first. The default is 4. This vari-
terminal. able can only be changed when using ComfortVIEW software or
4. The RJ14 CCN connector on LVT can also be used, but is Network Service Tool. This variable cannot be changed with the
scrolling marquee display.
only intended for temporary connection (for example, a lap-
top computer running Service Tool). COMMUNICATION FAILURE RETRY TIME
This variable specifies the amount of time that will be allowed
IMPORTANT: A shorted CCN bus cable will prevent some rou- to elapse between alarm retries. Retries occur when an alarm is
tines from running and may prevent the unit from starting. If not acknowledged by a network alarm acknowledger, which
abnormal conditions occur, unplug the connector. If conditions may be either a ComfortVIEW software or TeLink. If acknowl-
return to normal, check the CCN connector and cable. Run new edgment is not received, the alarm will be re-transmitted after
cable if necessary. A short in one section of the bus can cause the number of minutes specified in this decision. This variable
problems with all system elements on the bus. can only be changed with ComfortVIEW software or Network
Service Tool. This variable cannot be changed with the scroll-
Table 12 — CCN Communication Bus Wiring ing marquee display.
PART NO. RE-ALARM TIME
MANUFACTURER
REGULAR WIRING PLENUM WIRING This variable specifies the amount of time that will be allowed to
Alpha 1895 — elapse between re-alarms. A re-alarm occurs when the conditions
American A21451 A48301 that caused the initial alarm continue to persist for the number of
Belden 8205 884421 minutes specified in this decision. Re-alarming will continue to
Columbia D6451 — occur at the specified interval until the condition causing the alarm
Manhattan M13402 M64430 is corrected. This variable can only be changed with Comfort-
Quabik 6130 — VIEW software or Network Service Tool. This variable cannot be
changed with the scrolling marquee display.
Alarm Control
ALARM SYSTEM NAME
ALARM ROUTING CONTROL This variable specifies the system element name that will ap-
Alarms recorded on the chiller can be routed through the CCN. To pear in the alarms generated by the unit control. The name can
configure this option, the ComfortLink control must be configured be up to 8 alphanumeric characters in length. This variable can
to determine which CCN elements will receive and process only be changed with ComfortVIEW software or Network Ser-
alarms. Input for the decision consists of eight digits, each of vice Tool. This variable cannot be changed with the scrolling
which can be set to either 0 or 1. Setting a digit to 1 specifies that marquee display.
alarms will be sent to the system element that corresponds to that
digit. Setting all digits to 0 disables alarm processing. The factory Sensors
default is 00000000. See Fig. 23. The default setting is based on The electronic control uses 4 to 7 thermistors to sense tempera-
the assumption that the unit will not be connected to a network. If tures for controlling chiller operation. See Table 5. These sensors
the network does not contain a ComfortVIEW, Comfort- are outlined below. Thermistors RGTA, RGTB, EWT, LWT, and
WORKS™, TeLink, DataLINK™, or BAClink module, enabling OAT are 5 kat 77°F (25°C) thermistors and are identical in tem-
this feature will only add unnecessary activity to the CCN com- perature versus resistance and voltage drop performance. The dual
munication bus. chiller thermistor is 5 kat 77°F (25°C)thermistor. Space tem-
This option can be modified with Network Service Tool. It cannot perature thermistor is a 10 kat 77°F (25°C). The DTT thermis-
be modified with the scrolling marquee display. tor is an 86 kat 77°F (25°C)thermistor. See Thermistors section
for temperature-resistance-voltage drop characteristics.
Typical configuration of the Alarm Routing variable is 11010000.
This Alarm Routing status will transmit alarms to ComfortVIEW
software, TeLink, BAClink, and DataLINK.

DESCRIPTION STATUS POINT

Alarm Routing 0 0 0 0 0 0 0 0 ALRM_CNT

ComfortVIEW™ or ComfortWORKS™

TeLink

Unused

BACLink or DataLINK™

Unused

Fig. 23 — Alarm Routing Control

29
COOLER LEAVING FLUID SENSOR 6. Insert and secure the white (ground) wire to terminal 4 of the
The thermistor is installed in a well in the factory-installed leaving space temperature sensor.
fluid piping coming from the bottom of the brazed-plate heat 7. Insert and secure the black (–) wire to terminal 2 of the space
exchanger. temperature sensor.
COOLER ENTERING FLUID SENSOR 8. Connect the other end of the communication bus cable to the
The thermistor is installed in a well in the factory-installed remainder of the CCN communication bus.
entering fluid piping coming from the top of the brazed-plate heat SPT (T10) Part No. 33ZCT55SPT
exchanger.
COMPRESSOR RETURN GAS TEMPERATURE SENSOR Sensor

These thermistors are installed in a well located in the suction line LVT
of each circuit. SEN SEN
22
OUTDOOR-AIR TEMPERATURE SENSOR (OAT)
23
This sensor is factory installed on a bracket which is inserted
through the base pan of the unit.
DISCHARGE TEMPERATURE THERMISTOR (DTT) Fig. 24 — Typical Space Temperature Sensor Wiring
This sensor is only used on units with the digital compressor op-
T-55 Space
tion. The sensor is mounted on the discharge line close to the dis- Sensor
charge of the digital compressor. It attaches to the discharge line
using a spring clip and protects the system from high discharge
6
gas temperature when the digital compressor is used. This sensor
is connected to the AUX board. CCN+ 5

REMOTE SPACE TEMPERATURE SENSOR OR DUAL To CCN CCN GND 4

LEAVING WATER TEMPERATURE SENSOR COMM 1
Bus (Plug) 3
One of two inputs can be connected to the LVT. See appropriate At Unit
sensor below. CCN- 2

Remote Space Temperature Sensor 1

Sensor (part no. 33ZCT55SPT) is an accessory sensor that is
remotely mounted in the controlled space and used for space tem-
perature reset. The sensor should be installed as a wall-mounted
thermostat would be (in the conditioned space where it will not be Fig. 25 — CCN Communications Bus Wiring
subjected to either a cooling or heating source or direct exposure to Optional Space Sensor RJ11 Connector
to sunlight, and 4 to 5 ft above the floor). Dual Leaving Water Temperature Sensor
Space temperature sensor wires are to be connected to terminals in For dual chiller applications (parallel only are supported), connect
the unit main control box. The space temperature sensor includes a the dual chiller leaving fluid temperature sensor (refer to Config-
terminal block (SEN) and a RJ11 female connector. The RJ11 uring and Operating Dual Chiller Control section on page 43) to
connector is used access into the Carrier Comfort Network® the space temperature input of the Master chiller. If space tempera-
(CCN) at the sensor. ture is required for reset applications, connect the sensor to the
To connect the space temperature sensor (Fig. 24): Slave chiller and configure the slave chiller to broadcast the value
1. Using a 20 AWG twisted pair conductor cable rated for the to the Master chiller. The sensor wire must not be routed with any
application, connect 1 wire of the twisted pair to one SEN ter- power wire.
minal and connect the other wire to the other SEN terminal Energy Management Module
located under the cover of the space temperature sensor.
This factory-installed option (FIOP) or field-installed accessory is
2. Connect the other ends of the wires to LVT-22,23 located in used for the following types of temperature reset, demand limit,
the unit control box. and/or ice features: (See Fig. 26.)
3. Units on the CCN can be monitored from the space at the sen- • 4 to 20 mA leaving fluid temperature reset (requires field-
sor through the RJ11 connector, if desired. To wire the RJ11 supplied 4 to 20 mA generator)
connector into the CCN (Fig. 25): • 4 to 20 mA cooling set point reset (requires field-supplied
4 to 20 mA generator)
IMPORTANT: The cable selected for the RJ11 connector wiring • Discrete inputs for 2-step demand limit (requires field-sup-
MUST be identical to the CCN communication bus wire used plied dry contacts capable of handling a 24 vac, 50 mA
for the entire network. Refer to Table 12 for acceptable wiring. load)
4. Cut the CCN wire and strip ends of the red (+), white • 4 to 20 mA demand limit (requires field-supplied 4 to 20
mA generator)
(ground), and black (–) conductors. (If another wire color
scheme is used, strip ends of appropriate wires.) • Discrete input for Ice Done switch (requires field-supplied
dry contacts capable of handling a 24 vac, 50 mA load)
5. Insert and secure the red (+) wire to terminal 5 of the space
See Temperature Reset and Demand Limit sections on pages 43
temperature sensor terminal block. and 49 for further details.

30
 Capacity Control
CAUTION The control system cycles compressors, digital scroll modulating
solenoid (if equipped), and minimum load valve solenoids (if
equipped) to maintain the user-configured leaving chilled fluid
Care should be taken when interfacing with other manufac- temperature set point. Entering fluid temperature is used by the
turer’s control systems due to possible power supply differ- main base board (MBB) to determine the temperature drop across
ences, full wave bridge versus half wave rectification. The two
the cooler and is used in determining the optimum time to add or
different power supplies cannot be mixed. ComfortLink con- subtract capacity stages. The chilled fluid temperature set point
trols use half wave rectification. A signal isolation device can be automatically reset by the return fluid temperature, space,
should be utilized if a full wave bridge signal generating
or outdoor-air temperature reset features. It can also be reset from
device is used. an external 4 to 20 mA signal (requires energy management mod-
Loss-of-Cooler Flow Protection ule FIOP or accessory).
A proof-of-cooler flow device is factory installed in all chillers. It The standard control has an automatic lead-lag feature built in
is recommended that proper operation of the switch be verified on which determines the wear factor (combination of starts and run
a regular basis. hours) for each compressor. If all compressors are off and less than
30 minutes has elapsed since the last compressor was turned off,
Electronic Expansion Valves (EXVs) the wear factor is used to determine which compressor to start
All units are equipped from the factory with EXVs. Each refriger- next. If no compressors have been running for more than 30 min-
ation circuit is also supplied with a factory-installed liquid line fil- utes and the leaving fluid temperature is greater than the saturated
ter drier and sight glass. condensing temperature, the wear factor is still used to determine
which compressor to start next. If the leaving fluid temperature is
The EXV is set at the factory to maintain 9°F (5.0°C) suction su- less than the saturated condensing temperature, then the control
perheat leaving the cooler by metering the proper amount of re- will start either compressor A1 or compressor B1 first, depending
frigerant into the cooler. The superheat set point is adjustable, but on the user-configurable circuit lead-lag value. For units with min-
should not be adjusted unless absolutely necessary. imum load control valve, the A circuit with minimum load valve
The EXV is designed to limit the cooler saturated suction is always the lead circuit. The A circuit is also always the lead for
temperature to 50°F (12.8°C). This makes it possible for unit to units with the digital compressor option. On units with the digital
start at high cooler fluid temperatures without overloading the scroll option, the A1 compressor operates continuously, providing
compressor. close leaving chilled water control. For this reason, on/off cycling
of the unit’s compressors is dramatically reduced, which in turn re-
duces wear associated with compressor start/stop cycles.

CEBD430351-0396-01C
PWR

J1 J2

CEPL130351-01
J4 J3 LEN

TEST 1
STATUS

J5

J7
J6 TEST 2

Green LED - Address

Red LED - Status LEN (Local Equipment Network DIP Switch

Fig. 26 — Energy Management Module

31
The EXVs provide a controlled start-up. During start-up, low The value can be changed to Circuit A or Circuit B leading as de-
pressure logic will be bypassed for 2-1/2 minutes to allow for tran- sired. Set at automatic, the control will sum the current number of
sient changes during start-up. As additional stages of compression logged circuit starts and one-quarter of the current operating hours
are required, the processor control will add them. See Table 13. for each circuit. The circuit with the lowest sum is started first.
If a circuit is to be stopped, the compressor with the lowest wear Changes to which circuit is the lead circuit and which is the lag are
factor will be shut off first except when a digital compressor is also made when total machine capacity is at 100% or when there
used. The digital compressor is always the last compressor to is a change in the direction of capacity (increase or decrease) and
shut off. each circuit’s capacity is equal.
The capacity control algorithm runs every 30 seconds. The algo- LOADING SEQUENCE SELECT
rithm attempts to maintain the Control Point at the desired set This is configurable as equal circuit loading or staged circuit load-
point. Each time it runs, the control reads the entering and leaving ing with the default set at equal (Configuration 
fluid temperatures. The control determines the rate at which con- OPT2LOAD). The control determines the order in which the
ditions are changing and calculates 2 variables based on these con- steps of capacity for each circuit are changed. Set to equal, the unit
ditions. Next, a capacity ratio is calculated using the 2 variables to will alternate starting compressors in each circuit as the require-
determine whether or not to make any changes to the current stag- ment increases. Set to staged, one circuit will load completely be-
es of capacity. This ratio value ranges from –100 to +100%. If the fore the second circuit is started. This control choice does NOT
next stage of capacity is a compressor, the control starts (stops) a have any impact on machines with only one circuit or units with 2
compressor when the ratio reaches +100% (–100%). If installed, compressors - one in each circuit.
the minimum load valve solenoid will be energized with the first
stage of capacity. Minimum load valve value is a fixed 30% in the LOW AMBIENT LOCKOUT
total capacity calculation. The control will also use the minimum The control software has a feature that allows the user to select an
load valve solenoid as the last stage of capacity before turning off outdoor air temperature (OAT) at which mechanical cooling will
the last compressor. A delay of 90 seconds occurs after each ca- be disabled. To use this feature, set OAT Lockout Temperature
pacity step change. Refer to Table 14. (Set Points COOLOAT.L) to a value between –19 and 120°F
MINUTES LEFT FOR START (–28.3 and 48.9°C). This value should be set to the desired tem-
perature at which no mechanical cooling is required. Any time the
This value is displayed only in the network display tables (using feature is active due to the outdoor air temperature being below
Service Tool, ComfortVIEW™ or ComfortWORKS™ software) the field programmed value, the machine will indicate OAT Be-
and represents the amount of time to elapse before the unit will low Lockout Temp (Operating ModesMODE MD.OL=
start its initialization routine. This value can be zero without the ON). Mechanical cooling will be enabled once the Outdoor Ambi-
machine running in many situations. This can include being unoc- ent is 3°F (1.6°C) above the OAT.L set point. The factory default
cupied, Enable/Off/Remote Control switch in the Off position, is –20°F (–28.9°C) and indicates that this feature is disabled. If an
CCN not allowing unit to start, Demand Limit in effect, no call for Outdoor Air Temperature Sensor failure is declared, this feature
cooling due to no load, and alarm or alert conditions present. If the must be disabled by setting the OAT.L to –20°F (–28.9°C), to al-
machine should be running and none of the above are true, a mini- low the unit to operate.
mum off time (DELY, see below) may be in effect. The machine
should start normally once the time limit has expired. CAPACITY CONTROL OVERRIDES
MINUTES OFF TIME The following overrides will modify the normal operation of the
routine.
(ConfigurationOPT2 DELY)
Deadband Multiplier
This user-configurable time period is used by the control to
determine how long unit operation is delayed after power is The user configurable Deadband Multiplier (Configuration 
applied/restored to the unit. Typically, this time period is SLCTZ.GN) has a default value of 1.0. The range is from 1.0 to
configured when multiple machines are located on a single site. 4.0. When set to other than 1.0, this factor is applied to the capaci-
For example, this gives the user the ability to prevent all the units ty Load/Unload Factor. The larger this value is set, the longer the
from restarting at once after a power failure. A value of zero for control will delay between adding or removing stages of capacity.
this variable does not mean that the unit should be running. Figure 27 shows how compressor starts can be reduced over time
if the leaving water temperature is allowed to drift a larger amount
LEAD/LAG DETERMINATION above and below the set point. This value should be set in the
This is a configurable choice and is factory set to be automatic for range of 3.0 to 4.0 for systems with small loop volumes.
all units. The 30RAP units offer an optional digital compressor. First Stage Override
When the unit is equipped with a digital scroll compressor and en- If the current capacity stage is zero, the control will modify the
abled (ConfigurationUNITA1.TY=YES), or minimum load, routine with a 1.2 factor on adding the first stage to reduce cycling.
then circuit A is lead (ConfigurationOPT2LLCS). This factor is also applied when the control is attempting to re-
If the unit is equipped with Minimum Load Valve (MLV) and op- move the last stage of capacity.
tion has been enabled, Circuit A will be the last circuit on as ca-
pacity is decreasing for the MLV to be active for the last stage of SLOW CHANGE OVERRIDE
capacity. The control prevents the capacity stages from being changed when
the leaving fluid temperature is close to the set point (within an ad-
justable deadband) and moving towards the set point.

32
 Table 13 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve
CONTROL CAPACITY STEPSa CAPACITY %
30RAP UNIT SIZE
STEPS % Displacement Circuit A Circuit B
010 1 100 100 —
1 40
011 2 60 100 —
3 100
015 1 100 100 —
1 40
016 2 60 100 —
3 100
1 20
018 2 50 100 —
3 100
1 24b
020 2 50 100 —
3 100
1 29b
025 2 50 100 —
3 100
1 32b
030 2 50 100 —
3 100
1 9b
2 23
035 3 50 54 46
4 77
5 100
1 11b
2 23
040 3 50 47 53
4 73
5 100
1 12b
2 24
045 3 50 47 53
4 74
5 100
1 14b
2 25
050 3 50 50 50
4 75
5 100
1 13b
2 23
055 3 50 46 54
4 73
5 100
1 16b
2 25
060 3 50 50 50
4 75
5 100
1 13b
2 20
3 40
070 40 60
4 60
5 80
6 100
1 9b
2 15
3 31
080 4 46 46 54
5 64
6 82
7 100
1 11b
2 17
3 33
090 4 50 50 50
5 67
6 83
7 100
1 13b
2 19
3 38
100 43 57
4 57
5 76
6 100
1 11b
2 17
3 33
115 4 50 50 50
5 67
6 83
7 100

33
 Table 13 — Part Load Data Percent Displacement, Standard Units with Minimum Load Valve (cont)
CONTROL CAPACITY STEPSa CAPACITY %
30RAP UNIT SIZE
STEPS % Displacement Circuit A Circuit B
1 9b
2 15
3 30
130 4 44 44 56
5 63
6 81
7 100
1 11b
2 17
3 33
150 4 50 50 50
5 67
6 83
7 100
NOTE(S):
a. These capacity steps may vary due to different capacity staging sequences.
b. Minimum Load Valve energized.

Deadband Example 2 Starts

47
8
46

45
7
LWT (C)

LWT (F)

44

6 43

42
5 41
LEGEND 0 200 400 600 800 1000
3 Starts
LWT — Leaving Water Temperature Time (Seconds)
Standard Deadband
Modified Deadband

Fig. 27 — Deadband Multiplier

Ramp Loading circuit alert conditions (T116, T117) compare saturated suction
Ramp loading (ConfigurationSLCTCRMP) limits the rate temperature to the configured Brine Freeze Point (Set Points 
of change of leaving fluid temperature. If the unit is in a Cooling FRZ BR.FZ). The Brine Freeze point is a user-configurable
mode and configured for Ramp Loading, the control makes 2 value that must be left at 34°F (1.1°C) for 100% water systems. A
comparisons before deciding to change stages of capacity. The lower value may be entered for systems with brine solutions, but
control calculates a temperature difference between the control this value should be set according to the freeze protection level of
point and leaving fluid temperature. If the difference is greater the brine mixture. Failure to properly set this brine freeze point
than 4°F (2.2°C) and the rate of change (°F or °C per minute) is value may permanently damage the brazed plate heat exchanger.
more than the configured Cooling Ramp Loading value The control will initiate Mode 7 (Circuit A) or Mode 8 (Circuit B)
(CRMP), the control does not allow any changes to the current to indicate a circuit’s capacity is limited and that eventually the
stage of capacity. circuit may shut down.
Low Entering Fluid Temperature Unloading Head Pressure Control
When the entering fluid temperature is below the control point, the The main base board (MBB) controls the condenser fans to main-
control will attempt to remove 25% of the current stages being tain the lowest condensing temperature possible, and thus the
used. If exactly 25% cannot be removed, the control removes an highest unit efficiency. The MBB uses the saturated condensing
amount greater than 25% but no more than necessary. The lowest temperature input from the discharge pressure transducer and out-
stage will not be removed. side air temperature sensor to control the fans. Head pressure con-
Minimum Load Control trol is maintained through a calculated set point which is automat-
ically adjusted based on actual saturated condensing and saturated
If equipped, the minimum load control valve is energized only
when one compressor is running on Circuit A and capacity is de- suction temperatures so that the compressor(s) are always operat-
creasing, provided that the minimum run time for Circuit B com- ing within the manufacturer’s specified envelope (Fig. 28 and 29).
If OAT is greater than 70°F before a circuit is starting, then all
pressors has been satisfied.
condenser fan stages will be energized. A fan stage is increased
Cooler Freeze Protection based on SCT (saturated condensing temperature). When the
The control will try to prevent shutting the chiller down on a Cool- highest SCT is greater than the Fan On Set Point (Set
er Freeze Protection alarm by removing stages of capacity. If the PointsHEADF.ON), then an additional stage of fan will be
cooler fluid selected is Water, the freeze point is 34°F (1.1°C). If added to the current fan stage. Fan On Set Point (F.ON) equals
the cooler fluid selected is Brine, the freeze point is the Brine Head Set Point (Set PointsHEADH.DP) except after a fan
Freeze Point (Set PointsFRZBR.FZ). This alarm condition stage increase when the Head Set Point is increased by Fan Stage
(A207) only references leaving fluid temperature and NOT Brine Delta (Set PointsHEADF.DLT). A fan stage is decreased
Freeze point. If the cooler leaving fluid temperature is less than the when the SCTs of both circuits are less than the Fan Off Set Point
freeze point plus 2.0°F (1.1°C), the control will immediately re- (Set PointsHEAD F.OFF) for two minutes. Table 14 shows
move one stage of capacity. This can be repeated once every the number of fan stages, contactors energized and the fans that
30 seconds. are on during the fan stage. Unit sizes 035 to 060 have common
Low Saturated Suction Protection fan control. Figure 30 shows the location of each fan and control
box within the unit.
The control will try to prevent shutting a circuit down due to low
saturated suction conditions by removing stages of capacity. These

34
 170 160
160
150
150

Condensing Temperature (°F)

Condensing Temperature (°F)

140 140
130
130
120
110 120
100 110
90
80 100
70 90
60
50 80
40 70
30
-30 -20 -10 0 10 20 30 40 50 60 70 80 60
-30 -20 -10 0 10 20 30 40 50 60 70
Evaporating Temperature (°F)
Evaporating Temperature (°F)
Fig. 28 — 30RAP010-090 Operating Envelope Fig. 29 — 30RAP100-150 Operating Envelope
for R-410A Compressor for R-410A Compressor

OFM1

100-150 130-150
OFM1 Only Only
Control Box

Control Box

OFM2

OFM1 OFM3 OFM5 OFM7 OFM9

Control Box

Top View Top View

Sizes 010, 011, 015, 016 Sizes 018-030

OFM2 OFM4 OFM6 OFM8 OFM10

OFM1 OFM1 OFM3

Top View 080-150 Not On
Control Box
Control Box

Sizes 070-150 Only 100,130

OFM3

OFM2 OFM2 OFM4

Top View Top View

Sizes 035-050 Sizes 055,060

Fig. 30 — 30RAP Condenser Fan Layout

35
 Table 14 — Fan Stages, Standard Unit
FAN STAGES
30RAP UNIT SIZE
FAN STAGE CONTACTOR ENERGIZED FANS OPERATING
010,015 STAGE 1 MMR OFM1
STAGE 1 FC1 OFM1
018-030
STAGE 2 FC1,2 OFM1,2
STAGE 1 FC1 OFM3
035-050 STAGE 2 FC2 OFM1,2
STAGE 3 FC1,2 OFM1,2,3
STAGE 1 FC3 OFM4
STAGE 2 FC1,3 OFM4,3
055,060
STAGE 3 FC3,2 OFM4,1,2
STAGE 4 FC1,2,3 OFM1,2,3,4
STAGE 1 (CKT A) FC1 OFM5
STAGE 2 (CKT A) FC1,3 OFM5,6
070 STAGE 1 (CKT B) FC2 OFM1
STAGE 2 (CKT B) FC2,4 OFM1,3
STAGE 3 (CKT B) FC2,4,5 OFM1,3,2
STAGE 1 (CKT A) FC4 OFM3
STAGE 2 (CKT A) FC1 OFM5
STAGE 3 (CKT A) FC1,4 OFM3,5
STAGE 4 (CKT A) FC3,4 OFM2,3,4,6
STAGE 5 (CKT A) FC1,3 OFM2,5,4,6
080-090 STAGE 6 (CKT A) FC1,3,4 OFM2,3,4,5,6
(PSN 2214) STAGE 1 (CKT B) FC4 OFM3
STAGE 2 (CKT B) FC2 OFM1
STAGE 3 (CKT B) FC2,4 OFM1,3
STAGE 4 (CKT B) FC3,4 OFM2,3,4,6
STAGE 5 (CKT B) FC2,3 OFM1,2,4,6
STAGE 6 (CKT B) FC2,3,4 OFM1,2,3,4,6
STAGE 1 (CKT A) FC1 OFM5
STAGE 2 (CKT A) FC1,6 OFM5,4
STAGE 3 (CKT A) FC1,6,3 OFM5,4,6
080-090 STAGE 4 (CKT A) FC1,6,3,4 OFM5,4,6,3
(SSN 2214) STAGE 1 (CKT B) FC2 OFM1
STAGE 2 (CKT B) FC2,6 OFM1,4
STAGE 3 (CKT B) FC2,6,5 OFM1,4,2
STAGE 4 (CKT B) FC2,6,5,4 OFM1,4,2,3
STAGE 1 (CKT A) FC1 OFM7
STAGE 2 (CKT A) FC1,5 OFM7,5
STAGE 3 (CKT A) FC1,5,6 OFM7,5,8
100 STAGE 1 (CKT B) FC2 OFM1
STAGE 2 (CKT B) FC2,4 OFM1,3
STAGE 3 (CKT B) FC2,3 OFM1,2,4
STAGE 4 (CKT B) FC2,3,4 ORM1,2,3,4
STAGE 1 (CKT A) FC1 OFM7
STAGE 2 (CKT A) FC1,5 OFM7,5
STAGE 3 (CKT A) FC1,6 OFM7,6,8
STAGE 4 (CKT A) FC1,5,6 OFM7,5,6,8
115
STAGE 1 (CKT B) FC2 OFM1
STAGE 2 (CKT B) FC2,4 OFM1,3
STAGE 3 (CKT B) FC2,3 OFM1,2,4
STAGE 4 (CKT B) FC2,3,4 OFM1,2,3,4
STAGE 1 (CKT A) FC1 OFM9
STAGE 2 (CKT A) FC1,5 OFM9,7
STAGE 3 (CKT A) FC1,6 OFM9,8,10
STAGE 4 (CKT A) FC1,6,5 OFM9,8,10,7
130 STAGE 1 (CKT B) FC2 OFM1
STAGE 2 (CKT B) FC2,4 OFM1,3
STAGE 3 (CKT B) FC2,4,7 OFM1,3,5
STAGE 4 (CKT B) FC2,7,3 OFM1,5,2,4
STAGE 5 (CKT B) FC2,7,3,4 OFM1,5,2,4,3
STAGE 1 (CKT A) FC1 OFM9
STAGE 2 (CKT A) FC1,8 OFM9,6
STAGE 3 (CKT A) FC1,8,5 OFM9,6,7
STAGE 4 (CKT A) FC1,8,6 OFM9,6,8,10
STAGE 5 (CKT A) FC1,8,6,7 OFM9,6,8,10,5
150 STAGE 6 (CKT A) FC1,8,6,7,5 OFM9,6,8,10,5,7
STAGE 1 (CKT B) FC2 OFM1
STAGE 2 (CKT B) FC2,8 OFM1,6
STAGE 3 (CKT B) FC2,8,4 OFM1,6,3
STAGE 4 (CKT B) FC2,8,3 OFM1,6,2,4
STAGE 5 (CKT B) FC2,8,3,7 OFM1,6,2,4,5
STAGE 6 (CKT B) FC2,8,3,7,4 OFM1,6,2,4,5,3
LEGEND
PSN — Prior to serial number
SSN — Starting with serial number

36
MOTORMASTER® V OPTION Fan motor troubleshooting should be done at the main control
The Motormaster V controller is standard on 30RAP010 and 015 box. Disconnect power from unit. All fan motors are connected to
size units. For all other standard (non-Greenspeed/HEVCF) units Terminal Block 2. Disconnect each fan cable and check resistance
that need low-ambient operation, the lead fan on a circuit can be of motor. An open or short reading between phases or a phase and
equipped with the Motormaster V head pressure controller option ground could signify a failed fan motor. Verify reading at motor
or accessory. The controller is energized with the first fan stage before replacing. Reconnect wires using label coding L1, L2, and
and adjusts fan speed to maintain a SCT of 72°F (22.2°C). The L3. Replace main control box cover, and power up the unit to test
first stage of fan operation is controlled by the Motormaster V fan operation.
controller. Refer to Fig. 30 for condenser fan layout information. Drive alarms are shown on the chiller controls as A179, A412, and
The Motormaster is configured in Motormaster Select (Configu- A413. Refer to Alarms and Alerts section starting on page 94 for a
rationMMMMR.S=1 (LOW AMBIENT)). complete list of alarms and the common alarms with possible
causes. For more details see the drive manual supplied with the
High-Efficiency Variable Condenser Fans chiller.
30RAP011-060 WITH GREENSPEED® INTELLIGENCE Drives and motors are protected by fuses for short circuit protec-
tion. See the Service Test section for details. Fan motor overload
This option controls the speed of all fans for improvement in part protection is provided by an overload device internal to the motor.
load efficiency and sound levels. All fans run at the same speed.
The motor overload responds to a combination of temperature and
High-Efficiency Variable Condenser Fans (HEVCF) is standard current. On overload condition, the device breaks all 3 phases to
on 30RAP011 and 016 size units; it is not available on sizes the motor. It will reset automatically once the motor temperature
30RAP010 and 015. HEVCF is configured in Motormaster Select
cools.
(ConfigurationMMMMR.S=2 (GREENSPEED)).
For the HEVCF option, the following parameters should also be Table 16 — High-Efficiency Fan Drive Parameters
configured from the factory exactly as shown in Table 15.
PARAMETER DESCRIPTION SETTING
Table 15 — HECVF Configuration 0-02 Motor Speed Unit 1 = Hz

VOLTS (ConfigurationUnitVLTS)
1-03 Torque characteristic 1 = Variable Torque
UNIT VOLTAGE
1-73 Flying Restart 1 = Yes
575-3-60 575
1-80 Function at Stop 0 = Coast
380-3-60 380 1-90 Motor Temp Protection 0 = No
208/230-3-60 208 or 230 1-91 Motor External Fan 0 = No
460-3-60 460 1-93 Thermistor SRC 0 = No
380/415-3-50 400 3-02 Min Reference [Hz] 1
3-03 Max Reference [Hz] 60
Unit Fan Type Fan Poles (ConfigurationUnitF.POL) 3-13 Type Reference 0
Low Sound Fan 8 3-15 SRC REF#1 1 = AI#53
3-16 SRC REF#2 0 = No
Metal Fan 6
3-41 Ramp Up 10 = 10s
FAN DRIVE OPERATION 3-42 Ramp Down 10 = 10s
The HEVCF option uses Danfoss VLT 102 variable frequency 4-10 Motor Speed Direction 2 = Both
drives. Drives are connected to the LEN communication bus. 4-12 Motor Speed Low Limit [Hz] 5
Fan speed is determined by the chiller controller and communi- 4-14 Motor Speed High Limit [Hz] 61
cated to the drive. The drive must be set at Auto On mode. 4-16 Torque Limit [%] 150
4-18 Current Limit [%] 110
Fan speed is controlled to maintain SCT set point. The set point is 4-19 Max Output [Hz] 61
calculated from conditions and adjusted to the most efficient oper- 5-12 Digital Input 27 0 = No Operation
ating point. 14-01 Switching Frequency [4KHz] 6 = 4KHz
Drive parameters are set by the chiller control each time the unit 14-03 OverModulation 1 = Yes
power is cycled with the exception of the drive address. The drive 14-40 VT Level Zero Mag Level 66
address is set at the factory to 184 at Drive Parameter 8-31, but 14-60 Function at Overtemp 1 = Derate
will have to be configured in case of drive replacement. If the 14-61 Function at Inverter Overload 1 = Derate
drive address is not set correctly, the control would display Alarm 8-01 Control Site 2 = Digital and Control Word
A179. 8-02 Control Source 1 = FC port=RS485
The address is configured using the display on the drive. See drive 8-03 Control Timeout 20S
manual for detailed instructions. Once the address is set, the power 8-04 Control Timeout Function 2 = Stop
is cycled to reset all other parameters in the drive. Other parame- 8-05 Function at Timeout End 1= Resume setup
ters are listed in Tables 16 and 17 for reference. Drive must be in 8-10 Control Profile 0=FC Profile
“Auto” mode to operate. Push the “Auto” button at the bottom of 8-30 Protocol 20=LEN
the drive; the light above it will be on. 8-31 Address 184
8-32 Baud Rate 4=38400
The drive front cover is secured by a T-20 screw; the nominal
8-33 Parity/Stop Bit 2=No parity, 1 stop bit
torque is 18 inch-pounds (2 Nm). Refer to the power and control
8-34 Estimated Cycle Time 0 msec
wiring diagrams for all wiring requirements. Note the shield from
8-37 Max Intercharacter delay 5 msec
the LEN cable shall be attached to VFD ground.

37
 Table 17 — HEVCF Parameters Reset at Chiller Power Cycle
PARAMETER
NO. FANS 1-20 1-22 1-23 1-24 1-25
Motor Power (kW) Motor Volts Motor Frequency Motor Amps (A) Motor Speed (RPM)
208 6.5
380 3.9
60 1140
1 2.3 460 2.9
575 2.4
400 50 2.9 950
208 13
380 7.8
60 1140
2 4.6 460 5.8
575 4.8
400 50 5.8 950
208 19.5
380 11.7
60 1140
3 6.9 460 8.7
575 7.2
400 50 8.7 950
208 26
380 15.6
60 1140
4 9.2 460 11.6
575 9.6
400 50 11.6 950
208 6
380 3.9
60 850
1 1.6 460 2.9
575 2.4
400 50 2.9 710
208 12
380 7.8
60 850
2 4.6 460 5.8
575 4.8
400 50 5.8 710
208 18
380 11.7
60 850
3 6.9 460 8.7
575 7.2
400 50 8.7 710
208 24
380 15.6
60 850
4 9.2 460 11.6
575 9.6
400 50 11.6 710

Operation of Machine Based on Control Method The schedule number can be set anywhere from 65 to 99 for oper-
and Cooling Set Point Selection Settings ation under a CCN global schedule. The Enable/Off/Remote Con-
trol switch must be in the Enable or Remote Control position. The
Machine On/Off control is determined by the configuration of the control mode (Operating ModesMODE) will be 1 when the
Control Method (Configuration OPT2CTRL) and Cooling
switch is Off. The control mode will be 3 when the Enable/Off/
Set Point Select (ConfigurationSLCTCLSP) variables. All
Remote Control switch input is On and the time of day is during
units are factory configured with Cooling Set Point Select set to 0 an unoccupied period. Similarly, the control mode will be 7 when
(single set point). With the control method set to 0, simply switch- the time of day is during an occupied period.
ing the Enable/Off/Remote Control switch to the Enable or Re-
mote Control position (external contacts closed) will put the CCN CONTROL
chiller in an occupied state. The control mode (Operating
ModesMODE) will be 1 (OFF LOCAL) when the switch is Off (ConfigurationOPT2CTRL = 3)
and will be 5 (ON LOCAL) when in the Enable position or Re- An external CCN device such as Chillervisor System Manager
mote Control position with external contacts closed. controls the On/Off state of the machine. This CCN device forces
Two other control methods are available for Machine On/Off the variable “CHIL_S_S” between Start/Stop to control the chiller.
control: The control mode (Operating ModesMODE) will be 1 when
the Enable/Off/Remote Control switch is Off. The control mode
OCCUPANCY SCHEDULE will be 2 when the Enable/Off/Remote Control switch input is On
and the CHIL_S_S variable is “Stop”. Similarly, the control mode
(ConfigurationOPT2CTRL = 2) will be 6 when the CHIL_S_S variable is “Start”.
The main base board will use the operating schedules as defined Table 18 illustrates how the control method and cooling set point
under the Time Clock mode in the scrolling marquee display.
select variables direct the operation of the chiller and the set point
These schedules are identical. The schedule number must be set to to which it controls. The illustration also shows the ON/OFF state
1 for local schedule. of the machine for the given combinations.
38
 Table 18 — Control Methods and Cooling Set Points
CONTROL COOLING SET POINT SELECT (CLSP)
OCCUPANCY
TYPE 0 1 2 3
(CTRL) STATE
(Single) (Dual, Switch) (Dual, OCC) (4 to 20 mA)
Occupied ON,CSP1 ONa ON,CSP1 ONb
0 (switch)
Unoccupied ON,CSP1 ONa ON,CSP2 ON
Occupied ON,CSP1 ONa Illegal ONb
2 (Occupancy)
Unoccupied OFF OFF Illegal OFF
Occupied ON,CSP1 ONa ON,CSP1 ONb
3 (CCN)
Unoccupied ON,CSP1 ONa ON,CSP2 ONb
NOTE(S):
a. Dual set point switch input used. CSP1 used when switch input is open. CSP2 used when switch input is closed.
b. Cooling set point determined from 4 to 20 mA input to energy management module (EMM) to terminals LVT-10,8.

Cooling Set Point Select Ice Mode

Table 19 lists cooling set point limits. When Ice Mode is enabled (Configuration OPT2ICE.M),
Cooling Setpoint Select (ConfigurationSLCTCLSP) must
Table 19 — Cooling Set Point Limits be set to Dual Switch or Dual CCN Occupied. The Energy Man-
COOLER FLUID TYPE, FLUD agement Module (EMM) must be installed. Unit operation is
SET POINT LIMIT
1 = WATER 2 = MEDIUM BRINE
based on Cooling Setpoint 1 (CSP.1) during the Occupied mode,
Ice Setpoint (CSP.3) during the Unoccupied mode with the Ice
MINIMUM 40°F (4.4°C) 14°F (–10.0°C)
Done contacts open, and Cooling Setpoint 2 (CSP.2) during the
MAXIMUM 70°F (21.1°C) Unoccupied mode with the Ice Done contacts closed. These 3 set
SINGLE points can be utilized to develop your specific control strategy.
Unit operation is based on Cooling Set Point 1 (Set Points
 Cooling Set Point (4 to 20 mA)
COOLCSP.1). A field supplied and generated, externally powered 4 to 20 mA
DUAL SWITCH signal input to the Energy Management Module (EMM) can be
used to provide the leaving fluid temperature set point. Connect
Unit operation is based on Cooling Set Point 1 (Set the signal to LVT10,8 (+,–). Figure 31 shows how the 4 to 20 mA
PointsCOOLCSP.1) when the Dual Set Point switch con- signal is linearly calculated on an overall 10 to 80°F (–12.2 to
tacts are open and Cooling Set Point 2 (Set PointsCOOL
 26.7°C) range for fluid types (ConfigurationOPT1FLUD)
CSP.2) when they are closed. 1 or 2. The set point will be limited by the fluid (FLUD) type. Be
DUAL CCN OCCUPIED sure that the chilled water loop is protected at the lowest tempera-
ture. See Table 21.
Unit operation is based on Cooling Set Point 1 (Set
PointsCOOLCSP.1) during the Occupied mode and Cool- 90 (32)

ing Set Point 2 (Set PointsCOOLCSP.2) during the Unoc- 80 (27) MAXIMUM
SETPOINT
cupied mode as configured under the local occupancy schedule 70 (21)
70F(21.1C)
accessible only from CCN. Schedule Number in Table SCHE-
DOVR (See Appendix B) must be configured to 1. If the Schedule 60 (15)
SETPOINT F (C)

Number is set to 0, the unit will operate in a continuous 24-hour 50 (10) (FLUD=1) MINIMUM
SETPOINT 40F(4.4C)
Occupied mode. Control method must be configured to 0 (switch). 40 (4.4)
See Table 18. 30 (-1)
(FLUD=2) MINIMUM

4 TO 20 MA INPUT 20 (-7) SETPOINT 14F(-10.0C)

Unit operation is based on an external 4 to 20 mA signal input to 10 (-12)

the Energy Management Module (EMM). Refer to page 27. 0 (-17)

0 2 4 6 8 10 12 14 16 18 20 22

CONFIGURATION SET POINT LIMITS 4 to 20 mA Signal to EMM

Table 20 lists configuration set point limits. EMM — Energy Management Module

Table 20 — Configuration Set Point Limits Fig. 31 — Cooling Set Point (4 to 20 mA)
COOLER FLUID TYPE, FLUD
SET POINT LIMIT
1 = WATER 2 = MEDIUM BRINE
MINIMUM 40°F (4.4°C) 14°F (–10.0°C)
MAXIMUM 60°F (15.5°C)

39
 Table 21 — Menu Configuration of 4 to 20 mA Cooling Set Point Control
MODE KEYPAD SUB-MODE KEYPAD ITEM DISPLAY ITEM COMMENT
(RED LED) ENTRY ENTRY EXPANSION
ENTER DISP

UNIT

OPT1

OPT2

HP.A

HP.B

EXV.A

EXV.B
CONFIGURATION
M.MST

RSET

DMDC

SLCT ENTER
CLSP 0 COOLING SETPOINT SELECT
ENTER
0 Scrolling Stops
ENTER
0 Flashing “0”

3 Select “3”
ENTER
3 Change Accepted

Low Sound Mode Operation value to the ON position and press ENTER . Press ESCAPE and
All models are factory configured with the Low Sound Mode dis- the button to enter the OUTS or COMP sub-mode.
abled. In the Configuration mode under sub-mode OPT2, items Test the condenser fans, cooler pump(s), and alarm relay by
for Low Sound Mode Select (ConfigurationOPT2LS.MD), changing the item values from OFF to ON. These discrete out-
Low Sound Start Time (ConfigurationOPT2LS.ST), Low puts are then turned off if there is no keypad activity for 10 min-
Sound End Time (ConfigurationOPT2LS.ND) and Low utes. Use the arrow keys to select the desired percentage when
Sound Capacity Limit (ConfigurationOPT2LS.LT) are fac- testing expansion valves and Motormaster® V controller. When
tory configured so that the chiller always runs as quietly as possi- testing compressors, lead compressor must be started first. All
ble. This results in operation at increased saturated condensing compressor outputs can be turned on, but the control will limit
temperature. As a result, some models may not be able to achieve the rate by staging one compressor per minute. Compressor un-
rated efficiency. For chiller operation at rated efficiency, disable loaders and hot gas bypass relays/solenoids (if installed) can be
the low sound mode or adjust the low sound mode start and stop tested with the compressors on or off. The relays under the
times accordingly or set both times to 00:00 for rated efficiency COMP mode will stay on for 10 minutes if there is no keypad
operation 24 hours per day. In addition, the low sound capacity activity. Compressors will stay on until they are turned off by the
limit can be used to reduce overall chiller capacity, if required, by operator. The Service Test mode will remain enabled for as long
limiting the maximum to a user-configured percentage. as there is one or more compressors running. All safeties are
Heating Operation monitored during this test and will turn a compressor, a circuit,
or the machine off if required. Any other mode or sub-mode can
The chiller can be used for pump outputs or optional factory-in- be accessed, viewed, or changed during the TEST mode. The
stalled hydronic system operation can be utilized for heating appli- MODE item (Run StatusVIEW) will display “0” as long as
cations. The heating mode is activated when the control sees a the Service mode is enabled. The TEST sub-mode value must be
field-supplied closed switch input to terminal block LVT-19,20. changed back to OFF before the chiller can be switched to En-
The control locks out cooling when the heat relay input is seen. A able or Remote Control for normal operation.
field-supplied boiler relay connection is made using heat relay and
alarm relay contacts. Factory-installed “BOILER” connections The pump(s) in the hydronic package come factory prewired into
exist in the control panel near LVT for these applications. Alarms the main unit power supply/starter. In order to check proper pump
and alerts A189 through A202 are active during heating operation. rotation, use the Service Test function to test the condenser fans
and observe them for proper rotation. If fans turn correctly, the
Service Test pumps will rotate correctly. Clockwise rotation of the pump motor
Both main power and control circuit power must be on. cooling fans can also be used to determine that pumps are rotating
correctly.
The Service Test function should be used to verify proper opera-
tion of condenser fan(s), compressors, minimum load valve sole- Use Service Test function to test operation of pumps. Verify that
noid (if installed), cooler pump(s), EXVs, and remote alarm relay. the flow switch input is made when the pump is running. For dual
To use the Service Test mode, the Enable/Off/Remote Control pump hydronic systems, the control only uses one pump at a time.
switch must be in the Off position. Use the Service Test Mode and Consult the Installation Instructions supplied with this chiller and
Sub-Mode Directory table in Appendix A to enter the mode and use the circuit setter balancing valve installed in hydronic package
display TEST. Press ENTER twice so that Off flashes. Enter the to adjust fluid flow rate.
password if required. Use either arrow key to change the TEST

40
Optional Factory-Installed Hydronic Package The maximum load allowed for the Chilled Water Pump Starter is
If the chiller has factory-installed chilled fluid pumps, specific 5 VA sealed, 10 VA inrush at 24 volts. The starter coil is powered
steps should be followed for proper operation. from the chiller control system. The starter should be wired be-
tween LVT-25 and LVT-21. If equipped, the field-installed chilled
Cooler Pump Control water pump starter auxiliary contacts should be connected in se-
The AquaSnap® 30RAP machines equipped with a factory-in- ries with the chilled water flow switch.
stalled pump package are configured with the Cooler Pump Con- The Cooler Pump Relay will be energized when the machine is
trol (ConfigurationOPT1CPC) = ON. “On.” The chilled water pump interlock circuit consists of a
Machines not equipped with a pump package are configured with chilled water flow switch and a field-installed chilled water pump
the cooler pump control OFF. It is recommended that the machine interlock. If the chilled water pump interlock circuit does not close
control the chilled water pump. If not, a 5-minute time delay is re- within five (5) minutes of starting, an A200 — Cooler Flow/Inter-
quired after command to shut machine down is sent before chilled lock Failed to Close at Start-Up Alarm will be generated and
water pump is turned off. This is required to maintain water flow chiller will not be allowed to start.
during shutdown period of the machine. If the chilled water pump interlock or chilled water flow switch
With or without this option enabled, the cooler pump relay will be opens for at least three (3) seconds after initially being closed, an
energized when the machine enters an ON status (i.e., On Local, A201 — Cooler Flow/Interlock Contacts Opened During Normal
On CCN, On Time). An A207 — Cooler Freeze Protection Alarm Operation Alarm will be generated and the machine will stop.
will energize the cooler pump relay also, as an override. The cool- NO INTEGRAL PUMP — DUAL EXTERNAL PUMP
er pump relay will remain energized if the machine is in MODE CONTROL
10 – Minimum Off Time.
With two external pumps, the following options must be
Cooler Pump Operation configured:
Two options of pump operation are available with 30RAP units • Cooler Pump Control (ConfigurationOPT1CPC) = ON.
(ConfigurationOPT1PMP.O). • Cooler Pump 1 Enable (ConfigurationOPT1 PM1E) =
The factory default for PMP.O is 0 (Auto) for automatic. In this YES.
mode, the pump will be energized any time the unit is enabled, or • Cooler Pump 2 Enable (ConfigurationOPT1 PM2E) =
for a freeze condition. The pump will be deenergized in any alarm YES.
other than A207 – Cooler Freeze Protection alarm.
The maximum load allowed for the Chilled Water Pump Starters
If PMP.O is set to 1 (Continuous), the chilled water pump will be is 5 VA sealed, 10 VA inrush at 24 volts. The starter coil is pow-
energized any time the unit is enabled. If the unit is in an alarm ered from the chiller control system. The starter for Chilled Water
condition, the pump will remain energized. Because of this fea- Pump 1 should be wired between LVT-25 and LVT-21. The starter
ture, a High Temperature Cut-Off variable, Configuration  for Chilled Water Pump 2 should be wired between LVT-24 and
OPT1PM.HT has been added for field configuration. If the LVT-21. A field-installed chilled water pump interlock for each
leaving chilled water temperature exceeds the configured value, pump must be connected to each pump’s interlock points on the
the pump will shut off to avoid overheating the chilled loop. The main base board. The chilled water pump 1 interlock, CWP1,
factory default is 95°F (35°C) and has a range of 95 to 125°F (35 must be connected to MBB-J7-1 and -2. The chilled water pump 2
to 52°C). This variable is only active when PMP.O is set to 1. interlock, CWP2, must be connected to MBB-J7-3 and -4. The
Cooler Pump Sequence of Operation chilled water pump interlock contacts should be rated for dry cir-
cuit application capable of handling 5 vdc at 2 mA.
At any time the unit is in an ON status, as defined by the one of the
following conditions, the cooler pump relay will be enabled. SINGLE INTEGRAL PUMP CONTROL
1. Enable-Off-Remote Switch in ENABLE, (CTRL=0). With a single pump, the following options must be configured:
2. Enable-Off-Remote Switch in REMOTE with a Start-Stop • Cooler Pump Control (ConfigurationOPT1CPC) = ON.
Remote Control closure (CTRL=0). • Cooler Pump 1 Enable (ConfigurationOPT1 PM1E) =
3. An Occupied Time Period from an Occupancy Schedule in YES.
combination with items 1 or 2 (CTRL=2). • Cooler Pump 2 Enable (ConfigurationOPT1 PM2E) =
4. A CCN Start-Stop Command to Start in combination with NO.
items 1 or 2 (CTRL=3). With a single integral pump, the Cooler Pump Starter will be ener-
gized when the machine is occupied. As part of the factory-in-
As stated before, there are certain alarm conditions and Operating stalled package, an auxiliary set of contacts is wired to the MBB to
Modes that will turn the cooler pump relay ON. This sequence serve as Chilled Water Pump Interlock. When the mechanical
will describe the normal operation of the pump control algorithm. cooling is called for, the pump interlock and flow switch is
When the unit cycles from an “On” state to an “Off” state, the checked. If the circuits are closed, the machine starts its capacity
cooler pump output will remain energized for the Cooler Pump routine. If the auxiliary contact interlock does not close within 25
Shutdown Delay (ConfigurationOPT1PM.DY). This is seconds of the ON command, a T190 — Cooler Pump 1 Aux
configurable from 0 to 10 minutes. The factory default is 1 minute. Contacts Failed to Close at Start-Up Alert will be generated and
the pump shut down. The unit will not be allowed to start. If the
NO INTEGRAL PUMP — SINGLE EXTERNAL PUMP chilled water flow switch does not close within one (1) minute,
CONTROL two alarms will be generated. A T192 — Cooler Pump 1 Failed to
With a single external pump, the following options must be con- Provide Flow at Start-Up Alert and an A200 — Cooler Flow/In-
figured: terlock Failed to Close at Start-Up Alarm will be generated and
• Cooler Pump Control (ConfigurationOPT1CPC) = chiller will not be allowed to start.
OFF. If the chilled water flow switch opens for at least 3 seconds after
• Cooler Pump 1 Enable (ConfigurationOPT1 PM1E) = initially being closed, a T196 — Flow Lost While Pump 1 Run-
NO. ning Alert and an A201 — Cooler Flow/Interlock Contacts
Opened During Normal Operation Alarm will be generated and
• Cooler Pump 2 Enable (ConfigurationOPT1 PM2E) = the machine will stop.
NO.

41
If the control detects the chilled water pump interlock open for 25 If Pump 2 starts and the auxiliary contact interlock does not close
seconds after initially being closed, a T194 — Cooler Pump 1 within 25 seconds of the ON command, a T191 — Cooler Pump 2
Contacts Opened During Normal Operation Alert is generated and Aux Contacts Failed to Close at Start-Up Alert will be generated
the unit is shut down. and the pump shut down. The unit will not be allowed to start. If
If the control detects the chilled water flow switch circuit closed the chilled water flow switch does not close within one (1) minute,
for at least 5 minutes with the pump output OFF, an A202 — two alarms will be generated. A T193 — Cooler Pump 2 Failed to
Cooler Pump Interlock Closed When Pump is Off Alarm will be Provide Flow at Start-Up Alert and an A200 — Cooler Flow/In-
generated and the unit will not be allowed to start. terlock Failed to Close at Start-Up Alarm will be generated and
chiller will not be allowed to start. In either fault case listed above,
If the control detects that the chilled water pump auxiliary contacts Pump 1 will be commanded to start once Pump 2 has failed.
are closed for at least 25 seconds while the pump is OFF, a T198
— Cooler Pump 1 Aux Contacts Closed While Pump Off Alert is If the chilled water flow switch opens for at least 3 seconds after
generated. The chiller will not be allowed to start. initially being closed, a T196 — Flow Lost While Pump 1 Run-
ning Alert or T197 — Flow Lost While Pump 2 Running Alert for
If the control starts a pump and the wrong interlock circuit closes the appropriate pump and an A201 — Cooler Flow/Interlock Con-
for at least 20 seconds, an A189 — Cooler Pump and Aux Contact tacts Opened During Normal Operation Alarm will be generated
Input Miswire Alarm will be generated. The unit will be prevented and the machine will stop. If available, the other pump will be
from starting. started. If flow is proven, the machine will be allowed to restart.
As part of a pump maintenance routine, the pump can be started to If a chilled water pump interlock that opens for 25 seconds after
maintain lubrication of the pump seal. To utilize this function, initially being closed is detected by the control, the appropriate
Cooler Pmp Periodic Start (ConfigurationOPT1 PM.P.S) T194 — Cooler Pump 1 Contacts Opened During Normal Opera-
must be set to YES. This option is set to NO as the factory default. tion Alert or T195 — Cooler Pump 2 Contacts Opened During
With this feature enabled, if the pump is not operating, it will be Normal Operation Alert is generated and the unit is shut down. If
started and operated for 2 seconds starting at 14:00 hours. If the available, the other pump will be started. If flow is proven, the ma-
pump is operating, this routine is skipped. If the pump has failed chine will be allowed to restart.
and an Alarm/Alert condition is active, the pump will not start that
day. If the control detects that the chilled water flow switch circuit is
closed for at least 5 minutes with the pump output OFF, an A202
DUAL INTEGRAL PUMP CONTROL — Cooler Pump Interlock Closed When Pump is Off Alarm will
With a dual integral pump package, the following options must be be generated and the unit will not be allowed to start.
configured: If the control detects that the chilled water pump auxiliary contacts
• Cooler Pump Control (ConfigurationOPT1CPC) = ON. are closed for at least 25 seconds while the pump is OFF, the ap-
propriate T198 — Cooler Pump 1 Aux Contacts Closed While
• Cooler Pump 1 Enable (ConfigurationOPT1 PM1E) = Pump Off or Alert T199 — Cooler Pump 2 Aux Contacts Closed
YES. While Pump Off Alert is generated. The chiller will not be al-
• Cooler Pump 2 Enable (ConfigurationOPT1 PM2E) = lowed to start.
YES. If the control starts a pump and the wrong interlock circuit closes
Pump Start Selection is a field-configurable choice. Cooler Pump for at least 20 seconds, an A189 – Cooler Pump and Aux Contact
Select (ConfigurationOPT1PM.SL) is factory defaulted to Input Miswire Alarm will be generated. The unit will be prevented
0 (Automatic). This value can be changed to 1 (Pump 1 Starts from starting.
First) or 2 (Pump 2 Starts First). If PM.SL is 0 (Automatic), the The control will allow for pump changeover. Two methods will
pump selection is based on two criteria: the alert status of a pump change the pump sequence. Before the changeover can occur, the
and the operational hours on the pump. If a pump has an active unit must be at Capacity Stage 0. During changeover the chilled
Alert condition, it will not be considered for the lead pump. The water flow switch input is ignored for 10 seconds to avoid a nui-
pump with the lowest operational hours will be the lead pump. A sance alarm.
pump is selected by the control to start and continues to be the lead
pump until the Pump Changeover Hours (Configura- With Cooler Pump Select (ConfigurationOPT1 PM.SL) set
tionOPT1PM.DT) is reached. to 0 (Automatic) and when the differential time limit Pump
Changeover Hours (ConfigurationOPT1PM.DT) is
The Lead Pump (Run StatusVIEWLD.PM) indicates the reached, the lead pump will be turned OFF. Approximately one
pump that has been selected as the lead pump: 1 (Pump 1), 2 (1) second later, the lag pump will start. Manual changeover can
(Pump 2), 3 (No Pump). The Pump Changeover Hours is factory be accomplished by changing Rotate Cooler Pump Now (Config-
defaulted to 500 hours. Regardless of the Cooler Pump Selection, urationOPT1ROT.P) to YES only if the machine is at Ca-
any pump that has an active alert will not be allowed to start. pacity Stage 0 and the differential time limit Pump Changeover
With the dual integral pump package, the Cooler Pump Starter Hours (PM.DT) is reached. If the PM.DT is not satisfied, the
will be energized when the machine is in an occupied period. As changeover will not occur. With the machine at Capacity Stage 0,
part of the factory-installed package, an auxiliary set of contacts is the pumps would rotate automatically as part of the normal rou-
wired to the MBB to serve as Chilled Water Pump Interlock, one tine.
set for each pump to individual channels on the MBB. With a call With Cooler Pump Select (PM.SL) set to 1 (Pump 1 Starts First)
for mechanical cooling, the specific pump interlock and flow or 2 (Pump 2 Starts First), a manual changeover can be accom-
switch are checked. If the circuits are closed, the machine starts its plished by changing PM.SL only. The machine Remote-Off-En-
capacity routine. If Pump 1 starts and the auxiliary contact inter- able Switch must be in the OFF position to change this variable.
lock does not close within 25 seconds of the ON command, a The Rotate Cooler Pump Now (ROT.P) feature does not work for
T190 — Cooler Pump 1 Aux Contacts Failed to Close at Start-Up these configuration options.
Alert will be generated and the pump shut down. The unit will not
be allowed to start. If the chilled water flow switch does not close As part of a pump maintenance routine, the pumps can be started
within 1 minute, two alarms will be generated. A T192 — Cooler to maintain lubrication to the pump seal. To utilize this function,
Pump 1 Failed to Provide Flow at Start-Up Alert and an A200 — Cooler Pmp Periodic Start (ConfigurationOPT1 PM.PS)
Cooler Flow/Interlock Failed to Close at Start-Up Alarm will be must be set to YES. This option is set to NO as the factory default.
generated and chiller will not be allowed to start. In either fault If feature is enabled and the pump(s) are not operating, then the
case listed above, Pump 2 will be commanded to start once Pump pumps will be operated every other day for 2 seconds starting at
1 has failed. 14:00 hours. If a pump has failed and has an active Alert condi-
tion, it will not be started that day.

42
Configuring and Operating Dual Chiller Control master chiller will be configured to use Lead/Lag Balance Select
The dual chiller routine is available for the control of two units (ConfigurationRSETLLBL) and Lead/Lag Balance Delta
supplying chilled fluid on a common loop. This control algorithm (ConfigurationRSETLLBD) to even out the chiller run-
is designed for parallel fluid flow arrangement only. One chiller times weekly. The Lag Start Delay (Configuration RSET 
must be configured as the master chiller, the other as the slave. An LLDY) feature will be set to 10 minutes. This will prevent the
additional leaving fluid temperature thermistor (Dual Chiller lag chiller from starting until the lead chiller has been at 100%
LWT) must be installed as shown in Fig. 32 and 33 and connected capacity for the length of the delay time. Parallel configuration
to the master chiller. Refer to Sensors section, page 29, for wiring. (ConfigurationRSETPARA) can only be configured to
The CCN communication bus must be connected between the two YES. The variables LLBL, LLBD, and LLDY are not used by
chillers. Connections can be made to the CCN screw terminals on the slave chiller.
LVT. Refer to Carrier Comfort Network® Interface section, page Dual chiller start/stop control is determined by configuration of
28, for wiring information. Configuration examples are shown in Control Method (ConfigurationOPT1CTRL) of the Master
Tables 22 and 23. chiller. The Slave chiller should always be configured for
CTRL=0 (Switch). If the chillers are to be controlled by Remote
Thermistor Controls, both Master and Slave chillers should be enabled togeth-
Wiring
er. Two separate relays or one relay with two sets of contacts may
Return Master Leaving
Fluid Chiller Fluid control the chillers. The Enable/Off/Remote Control switch
Slave
should be in the Remote Control position on both the Master and
Chiller Slave chillers. The Enable/Off/Remote Control switch should be
Install Dual Chiller LWT
Leaving Fluid Temperature
in the Enable position for CTRL=2 (Occupancy) or CTRL=3
Thermistor (T10) Here* (CCN Control).
*Depending on piping sizes, use either: Both chillers will stop if the Master chiller Enable/Off/Remote
• HH79NZ014 sensor/10HB50106801 well (3-in. sensor/well) Control switch is in the Off position. If the Emergency Stop switch
• HH79NZ029 sensor/10HB50106802 well (4-in. sensor/well) is turned off or an alarm is generated on the Master chiller the
Fig. 32 — Dual Chiller Thermistor Location Slave chiller will operate in a Stand-Alone mode. If the Emergen-
cy Stop switch is turned off or an alarm is generated on the Slave
DIMENSIONS in. (mm)
chiller the Master chiller will operate in a Stand-Alone mode.
PART
NUMBER A B The master chiller controls the slave chiller by changing its Con-
10HB50106801 3.10 (78.7) 1.55 (39.4) trol Mode (Run StatusVIEWSTAT) and its operating set-
10HB50106802 4.10 (104.1) 1.28 (32.5) point or Control Point (Run StatusVIEWCT.PT).
Temperature Reset
A
0.505/0.495
The control system is capable of handling leaving-fluid tempera-
B 0.61 ture reset based on return cooler fluid temperature. Because
DIA change in temperature through the cooler is a measure of the
building load, the return temperature reset is in effect an average
building load reset method. The control system is also capable of
6" Minimum temperature reset based on outdoor-air temperature (OAT), on
1/4 N.P.T. Clearance For space temperature (SPT), or from an externally powered 4 to
Thermistor
Removal
20 mA signal. Accessory sensors must be used for SPT reset
(33ZCT55SPT). The energy management module (EMM) must
Fig. 33 — Dual Leaving Water Thermistor Well be used for temperature reset using a 4 to 20 mA signal. See
Table 24.
Refer to Tables 22 and 23 for dual chiller configuration. In this
example the master chiller will be configured at address 1 and
the slave chiller at address 2. The master and slave chillers must IMPORTANT: Care should be taken when interfacing with other
reside on the same CCN bus (ConfigurationCCN CCNB) control systems due to possible power supply differences: full
but cannot have the same CCN address (Configura- wave bridge versus half wave rectification. Connection of con-
tionCCNCCNA). Both master and slave chillers must have trol devices with different power supplies may result in perma-
Lead/Lag Chiller Enable (ConfigurationRSET LLEN) nent damage. ComfortLink controls incorporate power supplies
configured to ENBL. Master/Slave Select (Configura- with half wave rectification. A signal isolation device should be
tionRSETMSSL) must be configured to MAST for the utilized if the signal generator incorporates a full wave bridge
master chiller and SLVE for the slave. Also in this example, the rectifier.

43
 Table 22 — Dual Chiller Configuration (Master Chiller Example) a,b

SUB-MODE ITEM KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENTS

DISP
UNIT
OPT1

ENTER CTRL CONTROL METHOD

OPT2 CTRL ENTER 0 SWITCH DEFAULT 0

ESCAPE OPT2

CCN

CCNA ENTER 1 CCN ADDRESS DEFAULT 1

CCNB
CCN
CCNB ENTER 0 CCN BUS NUMBER DEFAULT 0

ESCAPE CCN

PROCEED TO
RSET
SUBMODE RESET
ENTER
CRST COOLING RESET TYPE

LLEN LEAD/LAG CHILLER ENABLE 15 ITEMS

ENTER
LLEN DSBL SCROLLING STOPS

ENTER
DSBL VALUE FLASHES

ENBL SELECT ENBL

ENTER
LLEN ENBL LEAD/LAG CHILLER ENABLE CHANGE ACCEPTED
ESCAPE
LLEN

MSSL MASTER /SLAVE SELECT

ENTER
MSSL MAST MASTER /SLAVE SELECT DEFAULT MAST
ESCAPE
MSSL

SLVA SLAVE ADDRESS

ENTER
SLVA 0 SCROLLING STOPS

ENTER
0 VALUE FLASHES
RSET
2 SELECT 2

ENTER
SLVA 2 SLAVE ADDRESS CHANGE ACCEPTED
ESCAPE
SLVA

LLBL LEAD/LAG BALANCE SELECT

ENTER
LLBL 0 SCROLLING STOPS

ENTER
0 VALUE FLASHES

2 SELECT 2 - Automatic

ENTER
LLBL 2 LEAD/LAG BALANCE SELECT CHANGE ACCEPTED
ESCAPE
LLBL

LLBD LEAD/LAG BALANCE DELTA

ENTER
LLBD 168 LEAD/LAG BALANCE DELTA DEFAULT 168
ESCAPE
LLBD

LLDY LAG START DELAY

44
 Table 22 — Dual Chiller Configuration (Master Chiller Example) (cont)a,b
SUB-MODE ITEM KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENTS
ENTER
LLDY 5 SCROLLING STOPS

ENTER
5 VALUE FLASHES

10 SELECT 10
RSET ENTER
(CONT) LLDY 10 LAG START DELAY CHANGE ACCEPTED
ESCAPE
LLDY
ESCAPE
RSET

ENTER
PARA YES MASTER COMPLETE

NOTE(S):
a. Master Control Method (CTRL) can be configured as 0-Switch, 2-Occupancy or 3-CCN.
b. Parallel Configuration (PARA) cannot be changed.

45
 Table 23 — Dual Chiller Configuration (Slave Chiller Example)
SUB-MODE ITEM KEYPAD ENTRY DISPLAY ITEM EXPANSION COMMENTS

DISP

UNIT

OPT1

ENTER CTRL CONTROL METHOD

OPT2 CTRL 0 SWITCH DEFAULT 0a

ESCAPE OPT2

CCN

CCNA

CCNA ENTER 1 CCN ADDRESS SCROLLING STOPS

ENTER 1 VALUE FLASHES

2 SELECT 2b
CCN
CCNA ENTER 2 CCN ADDRESS CHANGE ACCEPTED

ESCAPE CCN

CCNB ENTER 0 CCN BUS NUMBER DEFAULT 0c

ESCAPE CCN

RSET PROCEED TO
SUBMODE RSET

ENTER CRST COOLING RESET TYPE

LLEN LEAD/LAG CHILLER ENABLE 15 ITEMS

LLEN ENTER DSBL SCROLLING STOPS

ENTER DSBL VALUE FLASHES

ENBL SELECT ENBL

LLEN ENTER ENBL LEAD/LAG CHILLER ENABLE CHANGE ACCEPTED

ESCAPE LLEN
RSET
MSSL MASTER /SLAVE SELECT

MSSL ENTER MAST SCROLLING STOPS

ENTER MAST VALUE FLASHES

SLVE SELECT SLVE

MSSL ENTER SLVE MASTER /SLAVE SELECT CHANGE ACCEPTED

ESCAPE MSSL

ESCAPE RSET SLAVE COMPLETEd

NOTE(S):
a. Slave Control Method (CTRL) must be configured for 0.
b. Slave CCN Address (CCNA) must be different than Master.
c. Slave CCN Bus Number (CCNB) must be the same as Master.
d. Slave does not require SLVA, LLBL, LLBD, or LLDY to be configured.

46
To use outdoor air or space temperature reset, four variables must To use return reset, four variables must be configured. In the Con-
be configured. In the Configuration mode under the sub-mode figuration mode under the sub-mode RSET, items CRST, RT.NO,
RSET, items (ConfigurationRSETCRST), (Configuration RT.F and RT.DG must be properly set. See Table 26. This exam-
RSETRM.NO), (ConfigurationRSETRM.F), and ple provides 5.0°F (2.8°C) chilled water set point reset at 2.0°F
(ConfigurationRSETRT.DG) must be properly set. See Ta- (1.1°C) cooler T and 0°F (0°C) reset at 10.0°F (5.6°C) cooler T.
ble 25. The outdoor air reset example provides 0°F (0°C) chilled The variable RT.NO should be set to the cooler temperature differ-
water set point reset at 85.0°F (29.4°C) outdoor-air temperature ence (T) where no chilled water temperature reset should occur.
and 15.0°F (8.3°C) reset at 55.0°F (12.8°C) outdoor-air tempera- The variable RT.F should be set to the cooler temperature differ-
ture. The space temperature reset example provides 0°F (0°C) ence where the maximum chilled water temperature reset should
chilled water set point reset at 72.0°F (22.2°C) space temperature occur. The variable RM.DG should be set to the maximum
and 6.0°F (3.3°C) reset at 68.0°F (20.0°C) space temperature. The amount of reset desired.
variable CRST should be configured for the type of reset desired. To verify that reset is functioning correctly, proceed to Run Status
The variable RM.NO should be set to the temperature that no reset mode, sub-mode VIEW, and subtract the active set point (Run
should occur. The variable RM.F should be set to the temperature StatusVIEWSETP) from the control point (Run Status 
that maximum reset is to occur. The variable RM.DG should be VIEWCTPT) to determine the degrees reset. Figures 34-36 are
set to the maximum amount of reset desired. examples of space, outdoor air, and water temperature resets.

Table 24 — 4 to 20 mA Reseta
SUB-MODE KEYPAD ENTRY ITEM DISPLAY ITEM EXPANSION COMMENT
0 = no reset
1 = 4 to 20 mA input
ENTER
CRST 1 COOLING RESET TYPE 2 = Outdoor air temp
RSET 3 = Return Fluid
4 = Space Temperature
5.0°F Default: 0°F (0°C) Reset at 20 mA
MA.DG (2.8 C) DEGREES COOL RESET Range: –30 to 30°F (–16.7 to 16.7°C)
NOTE(S):
a. The example shows how to configure the chiller for 4 to 20 mA reset. No reset will occur at 4.0 mA input, and a 5.0°F reset will occur at 20.0 mA. An EMM is required.

Table 25 — Configuring Outdoor Air and Space Temperature Reset

DISPLAY
MODE KEYPAD SUB- KEYPAD ITEM
(RED LED) ENTRY MODE ENTRY ITEM OUTDOOR SPACE EXPANSION COMMENT
AIR
ENTER DISP

UNIT

OPT1

OPT2

CCN

EXV.A

EXV.B
CONFIGURATION
MM
2 = Outdoor-Air Temperature
RSET ENTER
CRST 2 4 COOLING RESET TYPE 4 = Space Temperature
(Connect to LVT-22,23)
Default: 125.0°F (51.7°C)
RM.NOa REMOTE - NO
85°F 72°F Range: 0 to125°F
RESET TEMP
(–17.8 to 51.7°C)
REMOTE - FULL Default: 0.0°F (–17.8°C)
RM.F 55°F 68°F Range: 0 to 125°F
RESET TEMP
(–17.8 to 51.7°C)
Default: 0° F (0°C)
REMOTE - DEGREES
RM.DG 15°F 6°F Range: –30 to 30°F
RESET
(–16.7 to 16.7°C)
NOTE(S):
a. One item skipped in this example.

47
 Table 26 — Configuring Return Fluid Temperature Reset
MODE KEYPAD KEYPAD ITEM
SUB-MODE ITEM DISPLAY COMMENT
(RED LED) ENTRY ENTRY EXPANSION
ENTER DISP ENTER

UNIT ENTER

OPT1 ENTER

OPT2 ENTER

CCN

EXV.A

EXV.B

CONFIGURATION MM
0 = No Reset
1 = 4 to 20 mA Input (EMM required)
(Connect to LVT-9,8)
RSET ENTER
CRST 3 COOLING RESET TYPE 2 = Outdoor-Air Temperature
3 = Return Fluid
4 = Space Temperature
(Connect to LVT-22,23)
Default: 10.0°F (5.6°C)
RETURN FLUID - NO
RT.NOa 10.0°F Range: 0 to10°F COOLER T
RESET TEMP
(0 to 5.6°C)
Default: 0°F (0°C)
RETURN FLUID - FULL
RT.F 2.0°F Range: 0 to 30°F COOLER T
RESET TEMP (0 to 16.7°C)
RT.DG 5.0°F RETURN - DEGREES Default: 0°F (0°C)
RESET Range: –30 to 30°F (–16.7 to 16.7°C)
NOTE(S):
a. 4 items skipped in this example.

LEGEND LEGEND
LWT — Leaving Water (Fluid) Temperature LWT — Leaving Water (Fluid) Temperature

Fig. 34 — Space Temperature Reset Fig. 35 — Outdoor-Air Temperature Reset

48
 To use demand limit, select the type of demand limiting to use.
Design Rise
Then configure the demand limit set points based on the type
selected.
10

8
DEMAND LIMIT (2-STAGE SWITCH CONTROLLED)
To configure demand limit for 2-stage switch control set the De-
Reset Amount (°F)

mand Limit Select (ConfigurationRSETDMDC) to 1.

Then configure the 2 Demand Limit Switch points (Configura-
6
RT.F = 2

5
tionRSETDLS1) and (ConfigurationRSETDLS2) to
4 the desired capacity limit. See Table 27. Capacity steps are con-
3
trolled by 2 relay switch inputs field wired to LVT as shown in
2
Reset Amount RT.DG = 5 Fig. 6-19.
RT.NO = 10
For demand limit by 2-stage switch control, closing the first stage
demand limit contact will put the unit on the first demand limit
1

0
0 1 2 3 4 5 6 7 8 9 10
level. The unit will not exceed the percentage of capacity entered
ΔT (°F), Entering Fluid Temperature - Leaving Fluid Temperature as Demand Limit Switch 1 set point (DLS1). Closing contacts on
LEGEND the second demand limit switch prevents the unit from exceeding
EWT — Entering Water (Fluid) Temperature
the capacity entered as Demand Limit Switch 2 set point. The de-
LWT — Leaving Water (Fluid) Temperature mand limit stage that is set to the lowest demand takes priority if
both demand limit inputs are closed. If the demand limit percent-
Fig. 36 — Standard Chilled Fluid age does not match unit staging, the unit will limit capacity to the
Temperature Control — No Reset closest capacity stage.
Under normal operation, the chiller will maintain a constant leav- To disable demand limit configure DMDC to 0. See Table 27.
ing fluid temperature approximately equal to the chilled fluid set EXTERNALLY POWERED DEMAND LIMIT 
point. As the cooler load varies, the entering cooler fluid will (4 TO 20 MA CONTROLLED)
change in proportion to the load as shown in Fig. 36. Usually the
chiller size and leaving-fluid temperature set point are selected To configure demand limit for 4 to 20 mA control set the Demand
based on a full-load condition. At part load, the fluid temperature Limit Select (ConfigurationRSET DMDC) to 2. Then con-
set point may be colder than required. If the leaving fluid tempera- figure the Demand Limit at 20 mA (Configuration RSET 
ture was allowed to increase at part load, the efficiency of the ma- DM20) to the maximum loadshed value desired. Connect the out-
chine would increase. put from an externally powered 4 to 20 mA signal to terminal
Return temperature reset allows for the leaving temperature set block LVT-7,8. Refer to the unit wiring diagram for these connec-
point to be reset upward as a function of the return fluid tempera- tions to the optional/accessory energy management module and
ture or, in effect, the building load (see Fig. 37). terminal block. The control will reduce allowable capacity to this
level for the 20 mA signal. See Fig. 38 and Table 27.
Design Rise
10
CAUTION
9

8
Care should be taken when interfacing with other manufac-
turer’s control systems, due to possible power supply differ-
Reset Amount (°F)

6
ences, full wave bridge versus half wave rectification. The two
RT.F = 2
different power supplies cannot be mixed. ComfortLink con-
5
trols use half wave rectification. A signal isolation device
4
should be utilized if a full wave bridge signal generating
3 device is used.
RT.DG = 5
Reset Amount
DEMAND LIMIT (CCN LOADSHED CONTROLLED)
2
RT.NO = 10

1
To configure Demand Limit for CCN Loadshed control set the
0
0 1 2 3 4 5 6 7 8 9 10 Demand Limit Select (ConfigurationRSETDMDC) to 3.
ΔT (°F), Entering Fluid Temperature - Leaving Fluid Temperature Then configure the Loadshed Group Number (Configura-
tionRSETSHNM), Loadshed Demand Delta (Configura-
Fig. 37 — Reset Amount tionRSETSHDL), and Maximum Loadshed Time (Config-
Demand Limit urationRSETSHTM). See Table 27.
Demand limit is a feature that allows the unit capacity to be limit- The Loadshed Group number is established by the CCN system
ed during periods of peak energy usage. There are 3 types of de- designer. The ComfortLink controls will respond to a Redline
mand limiting that can be configured. The first type is through 2- command from the Loadshed control. When the Redline com-
stage switch control, which will reduce the maximum capacity to mand is received, the current stage of capacity is set to the maxi-
2 user-configurable percentages. The second type is by 4 to 20 mA mum stages available. Should the loadshed control send a Load-
signal input which will reduce the maximum capacity linearly be- shed command, the ComfortLink controls will reduce the current
tween 100% at a 4 mA input signal (no reduction) down to the stages by the value entered for Loadshed Demand delta. The Max-
user-configurable level at a 20 mA input signal. The third type imum Loadshed Time is the maximum length of time that a load-
uses the CCN Loadshed module and has the ability to limit the shed condition is allowed to exist. The control will disable the
current operating capacity to maximum and further reduce the ca- Redline/Loadshed command if no Cancel command has been re-
pacity if required. ceived within the configured maximum loadshed time limit.
NOTE: The 2-stage switch control and 4 to 20 mA input signal Digital Scroll Option
types of demand limiting require the energy management module The 30RAP010-090 units have a factory-installed option for a dig-
(EMM). ital scroll compressor which provides additional stages of unload-
ing for the unit. The digital compressor is always installed in the

49
A1 compressor location. When a digital compressor is installed, a 100%. Regardless of capacity, the compressor always rotates with
digital unloader solenoid (DUS) is used on the digital compressor. constant speed. As the compressor transitions from a loaded to un-
loaded state, the discharge and suction pressures will fluctuate and
DIGITAL SCROLL OPERATION the compressor sound will change.
A digital scroll operates in two stages — the “loaded state” when The ComfortLink controller controls and integrates the operation
the solenoid valve is deenergized and the “unloaded state” when of the DUS into the compressor staging routine to maintain tem-
the solenoid valve is energized. During the loaded state, the com- perature control. When a digital compressor is installed, an addi-
pressor operates like a standard scroll and delivers full capacity tional discharge gas temperature thermistor (DTT) is installed
and mass flow. along with the AUX board for control of the DUS.
However, during the unloaded state, there is no capacity and no
mass flow through the compressor. The capacity of the system is DIGITAL COMPRESSOR CONFIGURATION
varied by varying the time the compressor operates in an unloaded When a digital compressor is installed, the configuration parame-
and loaded state during a 15-second period. If the DUS is ener- ter (ConfigurationUNITA1.TY) is configured to YES.
gized for 7 seconds, the compressor will be operating at 47% ca- There is also a maximum unload time configuration (Configura-
pacity. If the DUS is energized for 10 seconds, the compressor will tionUNITMAX.T) that is set to 7 seconds, which indicates
be operating at approximately 33% of its capacity. Capacity is the the maximum unloading for the digital compressor is 47%. This is
time averaged summation of loaded and unloaded states, and its done to optimize efficiency of the system.
range is continuous from the minimum configured capacity to
Table 27 — Configuring Demand Limit
KEYPAD KEYPAD
MODE SUB-MODE ITEM DISPLAY ITEM EXPANSION COMMENT
ENTRY ENTRY
CONFIGURATION ENTER DISP ENTER

UNIT ENTER

OPT1 ENTER

OPT2 ENTER

CCN

EXV.A

EXV.B

MM

RSET ENTER CRST X Cooling Reset Type

Default: 0
0 = None
DMDCa X Demand Limit Select 1 = Switch
2 = 4 to 20 mA Input
3 = CCN Loadshed
Default: 100%
DM20 XXX % Demand Limit at 20 mA
Range: 0 to 100

SHNM XXX Loadshed Group Default: 0

Number Range: 0 to 99
Loadshed Demand Default: 0%
SHDL XXX% Delta Range: 0 to 60%
Maximum Loadshed Default: 60 min.
SHTM XXX MIN
Time Range: 0 to 120 min.
DLS1 XXX % Demand Limit Default: 80%
Switch 1 Range: 0 to 100%
Demand Limit Default: 50%
DLS2 XXX % Switch 2 Range: 0 to 100%
NOTE(S):
a. Seven items skipped in this example.

50
 100
50% CAPACITY AT 20 mA

MAX. ALLOWABLE LOAD (%)

80

60

40 100% CAPACITY AT 4 mA
75% CAPACITY AT 12 mA

20

0
0 2 4 6 8 10 12 14 16 18 20
DEMAND LIMIT SIGNAL – 4 - 20 mA INPUT

Fig. 38 — 4 to 20-mA Demand Limiting

PRE-START-UP

IMPORTANT: Before beginning Pre-Start-Up or Start-Up, com-

plete Start-Up Checklist for 30RAP Liquid Chiller at end of this
publication (pages CL-1 to CL-12). The checklist assures proper
start-up of a unit, and provides a record of unit condition, appli-
cation requirements, system information, and operation at initial
start-up.
Do not attempt to start the chiller until the following checks have
been completed.
System Check
1. Check all auxiliary components, such as chilled fluid pumps,
air-handling equipment, or other equipment to which the
chiller supplies liquid. Consult manufacturer’s instructions.
Verify that any pump interlock contacts have been properly
installed. If the unit has field-installed accessories, be sure all
are properly installed and wired correctly. Refer to unit wiring
diagrams.
2. Use the scrolling marquee display to adjust the Cooling Oil Sight Glass
Set Point.
3. Fill chilled fluid circuit with clean water (with recom-
mended inhibitor added) or other non-corrosive fluid to be
cooled. Bleed all air out of the high points of the system. If
chilled water is to be maintained at a temperature below Fig. 39 — Sight Glass Location
40°F (4.4°C) or outdoor temperatures are expected to be 6. Electrical power source must agree with unit nameplate.
below 32°F (0°C), an antifreeze of sufficient concentration 7. All condenser fan and factory-installed hydronic package
must be used to prevent freeze-up at anticipated suction pump motors are phase. For non-HEVCF units, check for
temperatures. proper rotation of condenser fans first BEFORE attempt-
The chilled water loop must be cleaned before the unit is ing to start pumps or compressors. For HEVCF units,
connected. check the phase to ensure the supply power phase rotation
NOTE: On units with digital scroll option do not check is clockwise A-B-C (L1-L2-L3). To reverse rotation, inter-
refrigerant charge if compressor is operating at less than change any two of the main incoming power leads.
100% capacity, digital operation can be disabled by con- 8. Be sure system is fully charged with refrigerant (see
figuring A1.TY = NO (ConfigurationUNITA1.TY) Check Refrigerant Charge section on page 52).
4. Check tightness of all electrical connections. 9. Verify proper operation of cooler and hydronic package
5. Oil should be visible in the compressor sight glass(es). See heaters (if installed). Heaters operate at the same voltage
Fig. 39. For unit sizes 010-090, an acceptable oil level is as the main incoming power supply and are single phase.
from 1/8 to 3/8 of sight glass. For unit sizes 100-150, an Heater current is approximately 0.4 amps for 460 and
acceptable oil level is from 3/4 to 7/8 of sight glass. No oil 575 v units. Heater current is approximately 0.8 amps for
should be removed unless the crankcase heater, if 230 v units.
equipped, has been energized for at least 24 hours. Adjust 10. If the unit is equipped with Motormaster V for Low Ambi-
the oil level as required. See Oil Charge section on ent Operation and has been without power for at least three
page 61 for Carrier approved oils. years, the DC Bus Capacitors must be reformed prior to
starting the device. See “MOTORASTER V CONTROL-
LER START-UP FOLLOWING EXTENDED SHUT-
DOWN” on page 72 for instructions.

51
 START-UP AND OPERATION mode on the scrolling marquee display to show the circuit saturat-
ed condensing temperature (TemperaturesCIR.ASCT.A) or
NOTE: Refer to Start-Up Checklist on pages CL-1 to CL-12. (TemperaturesCIR.B SCT.B). Charging is most accurate at
saturated discharge temperatures of 120 to 125°F (49 to 52°C).
CAUTION Block condenser airflow as required to reach this temperature
range. Add refrigerant until the system subcooling (SCT.A or
SCT.B minus liquid line temperature entering EXV) is approxi-
Crankcase heaters, if equipped, are wired into the control cir- mately 15 to 17°F (–9.4 to –8.3°C). Refrigerant VAPOR only may
cuit, so they are always operable as long as the main power be added to a circuit through the 1/4 in. suction Schrader connec-
supply disconnect is on (closed), even if any safety device is tion on the suction line.
open. Compressor heaters must be on for 24 hours prior to the
start-up of any compressor. Equipment damage could result if Charge Adjustment for Brine Operation
heaters are not energized for at least 24 hours prior to com- For 30RAP010-060 units, the 30RAP chiller does not require a
pressor start-up. medium temperature brine modification at any temperature within
the chiller application range which is as low as 14°F (–10°C) leav-
Crankcase Heaters ing fluid temperature.
Unit sizes 070-150 are equipped with crankcase heaters. Unit sizes For 30RAP070-150 units with MCHX condenser, see Table 28 for
010-060 require field-installed crankcase heater(s) if remote cool- proper charge adjustment. For 30RAP070-150 units with RTPF
er accessory is utilized. Compressor crankcase heaters, if condenser, no charge adjustment is needed.
equipped, must be on for 24 hours before start-up. To energize the
crankcase heaters, close the field disconnect and turn on the fan
circuit breakers. Leave the compressor circuit breakers off/open. CAUTION
The crankcase heaters are now energized.
Actual Start-Up Never charge liquid into low-pressure side of system. Do not
Actual start-up should be done only under supervision of a quali- overcharge. Overcharging results in higher discharge pres-
fied refrigeration mechanic. sure, possible compressor damage, and higher power con-
sumption. During charging or removal of refrigerant, be sure
1. Be sure all service valves are open. water is continuously circulating through the cooler to prevent
2. Using the scrolling marquee display, set leaving-fluid set freezing.
point (Set PointsCOOLCSP.1). No cooling range
adjustment is necessary. Operating Limitations
3. Start chilled fluid pump (if not configured for cooler pump COOLER FLOW RATES AND LOOP VOLUMES
control).
4. Turn Enable/Off/Remote Control switch to ENABLE Refer to Table 29 for minimum and maximum cooler flow rates,
position. and to Table 30 for minimum fluid volume requirements.
5. Allow unit to operate and confirm that everything is func- TEMPERATURES (See Table 31 for 30RAP standard tempera-
tioning properly. Check to see that leaving fluid tempera- ture limits.)
ture agrees with leaving set point (Set PointsCOOL
CSP.1) or (Set PointsCOOLCSP.2), or if reset is CAUTION
used, with the control point (Run StatusVIEW
CTPT). Do not operate with cooler leaving chiller water (fluid) tem-
6. Check the cooler leaving chilled water temperature to see perature (LCWT) below 40°F (4.4°C) without an appropriate
that it remains well above 32°F (0°C), or the brine freezing concentration of an inhibited antifreeze solution. Units should
point if the unit is a medium temperature brine unit. not be operated below 15°F (–9.4°C) when configured for
7. Recheck compressor oil level (see Oil Charge section). medium temperature brine. Damage to the cooler and/or com-
pressor(s) may result.
Check Refrigerant Charge
All 30RAP units are shipped with a complete operating charge of High Cooler Leaving Chilled Water (Fluid) Temperatures
R-410A and should be under sufficient pressure to conduct a leak (LCWT)
test after installation. If there is no system pressure, admit nitrogen During start-up with cooler LCWT above approximately 60°F
until a pressure is observed and then proceed to test for leaks. Af- (16°C), the unit expansion valve will limit suction pressure to
ter leaks are repaired, the system must be dehydrated. approximately 142 psig (929 kPa) to avoid overloading the
compressor.
All refrigerant charging should be done through the 1/4 in. Schrad-
er connection on the liquid line. Do NOT add refrigerant charge Low Cooler LCWT
through the low-pressure side of the system. If complete charging For standard units, the LCWT must be no lower than 40°F
is required, weigh in the appropriate charge for the circuit as (4.4°C). If the unit is the factory-installed optional medium tem-
shown on the unit nameplate. If partial charging is required, oper- perature brine unit, the cooler LCWT can go down to 15°F
ate circuit at full load and use an accurate temperature sensor on (–9.4°C).
the liquid line as it enters the filter drier. Use the Temperatures

Table 28 — Charge Adjustment for Brine Operation

Charge to be Removed from Brine Operation (lb)
30RAP UNIT SIZE 070 080 090 100 115 130 150
Leaving Brine Temperature Ckt A Ckt B CktA Ckt B Ckt A Ckt B Ckt A Ckt B Ckt A Ckt B Ckt A Ckt B Ckt A Ckt B
44°F-35°F No Change Is Needed
34°F-15°F 0.8 1.1 1.1 1.1 1.1 1.1 1.1 2.0 2.0 2.0 2.0 3.0 3.0 3.0

52
 Table 29 — Minimum Cooler Flow Rates
30RAP MINIMUM COOLER FLOW MAXIMUM COOLER FLOW MINIMUM COOLER FLOW MAXIMUM COOLER FLOW
UNIT SIZE RATE (GPM) RATE (GPM) RATE (L/S) RATE (L/S)
010 13 50 0.8 3.2
011 13 45 0.8 2.8
015 17 66 1.1 4.2
016 20 63 1.3 3.9
018 20 78 1.3 4.9
020 23 91 1.5 5.7
025 28 112 1.8 7.1
030 33 133 2.1 8.4
035 41 164 2.6 10.3
040 47 186 3.0 11.7
045 53 209 3.3 13.2
050 57 228 3.6 14.4
055 63 251 4.0 15.8
060 68 270 4.3 17.0
070 86 310 5.4 19.6
080 98 355 6.2 22.4
090 107 387 6.8 24.4
100 123 444 7.8 28.0
115 140 503 8.8 31.7
130 158 569 10.0 35.8
150 175 629 11.0 39.6

Table 30 — Minimum Fluid Volume in Circulation

PROCESS COOLING, CAUTION
NORMAL AIR CONDITIONING LOW AMBIENT OPERATION, OR
30RAP APPLICATION MEDIUM TEMPERATURE BRINE
UNIT GAL/TON (L PER kW) APPLICATIONS Brine duty application (below 40°F [4.4°C] LCWT) requires
SIZE GAL/TON (L PER kW)
an appropriate concentration of an inhibited antifreeze solution
STD UNIT HGBP DIGITAL STD UNIT HGBP DIGITAL
and may require low ambient head pressure control and wind
010-016 12 (13) N/A 3 (3.3) 12 (13) N/A 6 (6.5)
baffles for proper operation. Contact your Carrier representa-
018-030 6 (6.5) 4 (4.3) 3 (3.3) 10 (10.8) 10 (10.8) 6 (6.5)
tive for additional information for the specific application.
035-150 3 (3.3) 3 (3.3) 3 (3.3) 6 (6.5) 6 (6.5) 6 (6.5)
LEGEND VOLTAGE — ALL UNITS
HGBP — Hot Gas Bypass Main Power Supply
Table 31 — Temperature Limits for Minimum and maximum acceptable supply voltages are listed in
Standard 30RAP Units the Installation Instructions.
Unbalanced 3-Phase Supply Voltage — Never operate a motor
30RAP UNIT SIZE 010-030 035-150 where a phase imbalance between phases is greater than 2%. To
Temperature F C F C determine percent voltage imbalance:
Maximum Ambient Temperature 120 49 120 49
Minimum Ambient Temperature 45 7 32 0
max voltage deviation
from avg voltage
Maximum Cooler EWTa 95 35 95 35 % Voltage Imbalance = 100 x
Maximum Cooler LWT 70 21 70 21 average voltage
Minimum Cooler LWT 40 4.4 40 4.4 The maximum voltage deviation is the largest difference between
NOTE(S):
a voltage measurement across 2 legs and the average across all 3
legs.
a. For sustained operation, EWT should not exceed 85°F (29.4°C).
Example: Supply voltage is 240-3-60.
LEGEND
EWT — Entering Fluid (Water) Temperature
LWT — Leaving Fluid (Water) Temperature
AB = 243 v
LOW-AMBIENT OPERATION BC = 236 v
If operating temperatures below 45°F (7°C) on size 018-030 AC = 238 v
units, and 32°F (0°C) on size 035-150 units are expected,
accessory Motormaster® V control must be installed. Operating
temperatures can go as low as –20°F (–29°C) on size 010-016
1. Determine average voltage:
units, as standard, and all Greenspeed® units. Installation of
wind baffles is also required. Refer to separate installation 243 + 236 + 238
instructions for operation using this accessory. Contact your Average voltage =
3
Carrier representative for details.
717
=
3
= 239

53
2. Determine maximum deviation from average voltage: Access to the compressors is through latched panels from beneath
(AB) 243 – 239 = 4 v the control box on all models or from opposite the coil side (sizes
(BC) 239 – 236 = 3 v 010-030 only). The front door(s) provide access to the compres-
(AC) 239 – 238 = 1 v sor(s) and all components of the refrigeration system. For size
Maximum deviation is 4 v. 010-030 units, access to the controls is through the upper latched
outer door above the compressor access door. Similarly, the upper
3. Determine percent voltage imbalance: center latched door on sizes 035-150 gives access to the controls.
Inner panels are secured in place and should not be removed un-
4 less all power to the chiller is off.
% Voltage Imbalance = 100 x
239
Electronic Expansion Valve (EXV)
= 1.7%
See Fig. 40 for a cutaway view of the EXV. High-pressure liquid
This voltage imbalance is satisfactory as it is below the maximum refrigerant enters valve through the top. As refrigerant passes
allowable of 2%. through the orifice, pressure drops and refrigerant changes to a 2-
phase condition (liquid and vapor). The electronic expansion
IMPORTANT: If the supply voltage phase imbalance is more valve operates through an electronically controlled activation of a
than 2%, contact your local electric utility company immediate- stepper motor. The stepper motor stays in position, unless power
ly. Do not operate unit until imbalance condition is corrected. pulses initiate the two discrete sets of motor stator windings for
rotation in either direction. The direction depends on the phase
Control Circuit Power relationship of the power pulses.
Power for control circuit is supplied from the main incoming pow- As the stepper motor rotates, its motion is transferred to linear
er through a factory-installed control power transformer (TRAN1) movement by a lead screw. Refrigerant flow is modulated by ei-
for all models. Field wiring connections are made to the LVT. ther opening or closing the port. The valve includes a positive
shut-off when closed.
OPERATION SEQUENCE
During unit off cycle, the control monitors the outdoor air tem-
perature. If the ambient temperature drops below 40°F (4.4°C),
cooler and hydronic system heaters (if either are factory installed)
are energized.
The unit is started by putting the Enable/Off/Remote Control
switch in the ENABLE or Remote Control position. When the
unit receives a call for cooling (either from the internal control or
CCN network command or Remote Control closure), the unit
stages up in capacity to maintain the leaving fluid set point. The
first compressor starts 1-1/2 to 3 minutes after the call for cooling.
The lead circuit can be specifically designated on all models or se-
lected based on compressor run hours and starts depending on
field configuration. The unit control will override this selection
under certain starting conditions to properly maintain oil return to
the compressors. In general, on dual compressor circuits, the con-
trol will most often start the A1 or B1 compressor first, especially
after long off periods. The MBB controls fan stages to maintain 1. Cable
the head pressure set point and will automatically adjust unit ca- 2. Glass Seal
3. Motor Housing
pacity as required to keep compressors from operating outside of 4. Stepper Motor
the specified envelope. There are no pumpout or pumpdown se- 5. Bearing
quences on these chillers. 6. Lead Screw
7. Insert
For all units, if temperature reset is being used, the unit controls to 8. Valve Piston
a higher leaving-fluid temperature as the building load reduces. If 9. Valve Seat
demand limit is used, the unit may temporarily be unable to main- 10. Valve Port
tain the desired leaving-fluid temperature because of imposed Fig. 40 — Cutaway View of the Electronic Expansion
power limitations. Valve (Size 070-150 Shown)
SERVICE There are four different EXVs. Table 32 shows the number of
steps, by unit size, for each type of EXV. The EXV motor moves
at 200 or 150 steps per second, respectively, for sizes 010-060 or
sizes 070-150. Commanding the valve to either 0% or 100% will
WARNING add extra steps to the move, to ensure the valve is open or closed
completely.
Electrical shock can cause personal injury and death. Shut off
all power to this equipment during service. There may be more Table 32 — EXV Steps
than one disconnect switch. Tag all disconnect locations to UNIT SIZE 30RAP EXV STEPS
alert others not to restore power until work is completed. 010-020 1596
Electronic Components 025,030 2500
035-045 1596
CONTROL COMPONENTS 050-060 2500
Unit uses an advanced electronic control system that normally 070-090, 100 CKT A 2785
does not require service. 100 CKT B, 110-150 3690

54
The EXV board controls the valve. Each circuit has a thermistor if disconnected while under power. Connect positive test lead to
located in a well in the suction manifold before the compressor. EXV-J6 terminal 3 for Circuit A, EXV-J7 terminal 3 for Circuit B.
Suction pressure as measured by the suction pressure transducer is Set meter to approximately 20 vdc. Using the Service Test proce-
converted to a saturated suction temperature. The thermistor mea- dure above, move the valve output under test to 100%. DO NOT
sures the temperature of the superheated gas entering the compres- short meter leads together or pin 3 to any other pin as board dam-
sor and the pressure transducer determines the saturated tempera- age will occur.
ture of suction gas. The difference between the temperature of the
superheated gas and the saturated suction temperature is the super-
heat. The EXV board controls the position of the electronic expan- CAUTION
sion valve stepper motor to maintain superheat set point.
The MBB controls the superheat leaving cooler to approximate- Do not disconnect EXV connector with power applied to the
ly 9°F (5°C). Because EXV status is communicated to the main board. Damage to the board may result if disconnected while
base board (MBB) and is controlled by the EXV boards, it is under power. DO NOT short meter leads together or pin 3 to
possible to track the valve position. The unit is then protected any other pin as board damage will occur.
against loss of charge and a faulty valve. Just prior to compressor
start, the EXV will open. At low ambient temperatures the EXV During the next several seconds, carefully connect the negative
is closed at start-up. After initialization period, valve position is test lead to pins 1,2,4 and 5 in succession (plug J6 for Circuit A,
tracked by the EXV board by constantly monitoring the amount plug J7 for Circuit B). Digital voltmeters will average this signal
of valve movement. and display approximately 6 vdc. If it remains constant at a volt-
age other than 6 vdc or shows 0 volts, remove the connector to the
The EXV is also used to limit cooler saturated suction temperature valve and recheck.
to 50°F (10°C). This makes it possible for the chiller to start at
higher cooler fluid temperatures without overloading the compres- Press ENTER and select 0% to close the valve. Check the 4-position
sor. This is commonly referred to as MOP (maximum operating DIP switch on the board (all switches should be set to On). If a
pressure). At ambient temperatures above 110°F (43°C), MOP is problem still exists, replace the EXV board. If the reading is cor-
bypassed at start-up to prevent charge backup in the condenser. rect, the expansion valve and EXV wiring should be checked.
If it appears that the EXV module is not properly controlling cir- 1. Check color coding and wire connections. Make sure they
cuit operation to maintain correct superheat, there are a number of are connected to the correct terminals at the EXV board
checks that can be made using test functions and initialization fea- and EXV plug and that the cables are not crossed.
tures built into the microprocessor control. See the EXV Trouble-
shooting Procedure section to test EXVs. 2. Check for continuity and tight connection at all pin terminals.
3. If the motor fails to operate properly, check the resistance of
EXV Troubleshooting Procedure
each motor phase. Remove the EXV Board connector (J6
Follow steps below to diagnose and correct EXV problems. for Circuit A, J7 for Circuit B). Check the resistance of the
Check EXV motor operation first. Switch the Enable/Off/Remote two windings. Resistance between pins 1 and 2 for one
Control (EOR) switch to the Off position. Press ESCAPE on the winding or between pins 4 and 5 for the other winding
scrolling marquee until the display is blank or on Navigator™ dis- should be approximately 100 ± 10 ohms (sizes 010-060) or
play until “Select a menu item” appears on the display. Use the ar- 52 ± 5.2 ohms (sizes 070-150). Differences of more than
row keys to select the Service Test mode. Press ENTER . The display 10% between windings indicate a defective motor. Resis-
will be: tance between any lead and ground should be infinite or
“open.” Any resistance reading will indicate a shorted wind-
> TEST OFF ing and the valve will need to be replaced.
OUTS
COMP FIELD SERVICING INSTRUCTIONS
EXVs on sizes 025, 030, and 050-150 can be serviced. See Fig. 40
Press ENTER (password entry may be required) and use to for a cutaway view of the EXV for sizes 070-150. Motor kits for
change “OFF” to “ON”. Switch the EOR switch to Enable. The the EXVs on sizes 025, 030, and 050-150 are available as replace-
Service Test mode is now enabled. Move the pointer down to the ment parts. The EXVs on sizes 010-020 and 035-045 are hermetic
OUTS sub-mode and press ENTER . Move the pointer to item EXV.A and cannot be disassembled for installation or during service.
or EXV.B as needed. Press ENTER and the valve position will flash. EXV REPLACEMENT (ALL SIZES)
Use to select 100% valve position (hold for quick move- To replace the valve, perform the following procedure:
ment) and press ENTER. 1. Be sure the refrigerant has been recovered from the circuit.
2. Disconnect the EXV cable from the EXV. For sizes 010-
The technician should be able to feel the actuator moving by plac- 060, refer to Fig. 41 or 42 and remove the EXV retainer
ing a hand on the EXV. A sight glass is located on the valve body clip, taking care not to damage the clip as it will be
to verify that the actuator is moving. A hard knocking should be
felt from the actuator when it reaches the top of its stroke (can be required for installation later.
3. The valve may be replaced by cutting the piping. A tubing
heard if surroundings are relatively quiet). Press ENTER again twice cutter must be used to prevent creating contaminants in the
if necessary to confirm this. To close the valve, press ENTER , select piping.
4. The EXVs have copper connections and any brazing alloy
0% with and press ENTER . The actuator should knock when it
can be used to install the valve. During installation the
reaches the bottom of its stroke. If it is believed that the valve is torch flame should be directed away from the valve body
not working properly, continue with the checkout procedure be-
low. and cable. The valve body should be wrapped with a wet
cloth during the brazing operation. Be sure to use a nitro-
Check the EXV output signals at appropriate terminals on the gen purge while brazing the valve in place.
EXV board (see Fig. 41 or 42). Do not disconnect EXV connector
with power applied to the board. Damage to the board may result 5. Check for refrigerant leaks.

55
6. Once the valve body has cooled, reconnect the EXV cable. 5. To install the motor, be sure to use a new gasket. Connect the
Care should be taken to ensure engagement of the alignment EXV cable to the EXV motor assembly.
key. On sizes 010-060, install the EXV cable retainer clip. 6. Use Service Test as described on page 40 to open the EXV to
7. Check the operation of the valve using the EXV Trouble- 100%. This will retract the piston fully. Remove power from
shooting Procedure on page 55. the EXV board prior to removing the EXV cable. Remove
the EXV cable from the motor prior to installation. For 025,
030, 050-060 sizes, replacement motors are shipped in the
retracted position and may be installed as received; therefore,
BLK this step may be skipped if installing a new motor.
WHT
CAUTION
GRN
RED If the existing motor has been removed for inspection or clean-
ing, be sure that the piston is fully retracted into the motor
assembly before installation on the valve. Failure to do so will
permanently damage the drive and motor. Replacement motor
BLK assemblies are shipped in the retracted position and may be
installed as received.
WHT
7. Lightly oil the threads and gasket on the new motor. Carefully
GRN seat the motor on the valve body. Using a wrench and back-
RED up wrench as described above, tighten the motor assembly as
follows: one eighth turn more than hand tight is sufficient to
achieve a leak proof seal.
Fig. 41 — 30RAP010-060 EXV Cable Connections to 8. After the motor is tightened, the cable should be replaced on
EXV Module the valve. Care should be taken to ensure engagement of the
alignment key. Install the EXV cable retainer clip (see
Fig. 43).
9. Pressurize the system and check for leaks.
WHT 10. Reapply control power and test the operation using Service
BRN Test.
Sizes 070-150
BLK
BLU IMPORTANT: Obtain replacement gasket before opening EXV.
Do not re-use gaskets.
Perform the following procedure to replace the EXV motor:
WHT 1. Be sure the refrigerant has been recovered from the circuit.
BRN 2. On sizes 070-150, use Service Test as described on page
40 to open the EXV to 100%. This will retract the piston
fully.
BLK
3. Remove power from the EXV board and then disconnect
BLU the EXV cable from the EXV.
4. Using a wrench and back-up wrench, remove the motor
assembly from the EXV body. Be sure to place the back-
Fig. 42 — 30RAP070-150 EXV Cable Connections to up wrench on the adapter to remove the motor as shown in
EXV Module Fig. 44.
VALVE MOTOR REPLACEMENT 5. To install the motor, be sure to use a new gasket.
Sizes 025, 030, and 050-060 6. Manually depress the valve piston before installing the
motor assembly. This will allow for the lead screw to
engage the piston as the motor is installed.
IMPORTANT: Obtain replacement gasket before opening EXV. 7. Lightly oil the threads and gasket on the new motor. Care-
Do not re-use gaskets. fully seat the motor on the valve body. Using a wrench and
Perform the following procedure to replace the EXV motor: back-up wrench as described above, tighten the motor
assembly as follows: Tighten the motor to 36 ft-lb
1. Be sure the refrigerant has been recovered from the circuit. (50 Nm) and then tighten an additional 30 degrees as
2. Remove power from the EXV board. indicated in Fig. 44.
3. Refer to Fig. 43 and remove the EXV retainer clip, taking 8. After tightening the motor, replace the cable on the valve.
care not to damage the clip as it will be required for installa- Care should be taken to ensure engagement of the align-
tion later. ment key. Pressurize the system and check for leaks.
4. Using a wrench and back-up wrench, remove the motor 9. Reapply control power and test the operation using Ser-
assembly from the EXV body by placing the back-up wrench vice Test.
on the valve body.

56
 Included In Cable Kit

Cable

Cable

Cable Retainer

Motor And
Motor Adapter
Adapter Cable
Retainer
Assembly Assembly Clip

Gasket
Motor Adapter
Assembly

Sightglass

Sporla N

Flow Normal
Direction Flow
Direction

Fig. 43 — Electronic Expansion Valve Details (010-060)

DISASSEMBLY

Closed
Adapter

27mm / 11/16''

Open

NOTE: Open valve in Quick

Open Valve In Test
Quick sub-mode before
Test Sub-mode disassembling.
Before Disassembling

ASSEMBLY
Closed
50nm (36 Ft-lb)+ 30° 27mm / 11/16''

Open
Gasket

EF05BD271 NV 32.5mm
EF05BD331 NV 36mm

NOTES:
1. Push down on valve piston to close valve before assembling.
2. After valve is assembled close valve in Quick Test sub-mode or cycle power before opening service valve.

Fig. 44 — Disassembly and Assembly of EXV Motor (070-150)

57
Compressor Replacement as feasible. Remove high-pressure switch and pressure transduc-
Component locations are shown in Fig. 45-47. er(s) if required for compressor removal. Lift one corner of the
compressor at a time and remove all the rubber mounting grom-
All models contain scroll compressors and have from one to six mets (single compressor circuits) or steel spacers (dual compres-
compressors. The size 010-030 units are a single refrigeration cir- sor circuits). Remove the old compressor from the unit.
cuit while sizes 035-150 are dual circuit. Disconnect power to unit
using lockout tagout procedures. Slide the new compressor in place on the basepan. Lifting one side
of the compressor at a time, replace all of the compressor mount-
Remove the junction box cover bolts (Danfoss compressors only) ing grommets. Using new tubing as required, reconnect compres-
and disconnect the compressor power and ground connections. sor suction and discharge lines. Using hardware saved, reinstall
Remove the cable from the compressor junction box. Knock the the mounting bolts and washers through the compressor feet. Us-
same holes out of the new compressor junction box and install the ing proper techniques, braze suction and discharge lines and check
cable connectors from the old compressor. for leaks. Reconnect oil equalization line on dual compressor cir-
The compressors are bolted to rails, which are in turn bolted to the cuit models.
unit basepan for all sizes except 010 and 015 which are directly Reconnect the compressor power connections and high-pressure
bolted to the basepan. Remove the 4 bolts holding the compressor switch wiring as on the old compressor. Refer to Fig. 45-47. Fol-
to the rail on the basepan. Save the mounting hardware for use lowing the installation of the new compressor, tighten all hardware
with the new compressor. Carefully cut the compressor suction to the following specifications. (See Table 33.)
and discharge lines with a tubing cutter as close to the compressor

DPT HPS
Suction
Access
EWT Valve

SPT
RGT

LEGEND
DPT — Discharge Pressure Thermostat
DTT — Discharge Temperature Thermistor
EWT — Entering Water Thermistor Compressor A2
HPS — High Pressure Switch
LWT — Leaving Water Thermistor
RGT — Return Gas Thermistor
LWT DTT Compressor A1
SPT — Suction Pressure Transducer Flow
Switch

Fig. 45 — Component Location — 30RAP010-030

58
 SPT RGT
RGT SPT Suction
Access
Valve
DPT HPS

Discharge
Access EWT
Valve

DTT

A1

A2

B1

B2
Oil Sight Glass
LEGEND
DPT — Discharge Pressure Thermostat
LWT
DTT — Discharge Temperature Thermistor
EWT — Entering Water Thermistor
Discharge HPS — High Pressure Switch
Access DPT LWT — Leaving Water Thermistor
Valve Flow
HPS Switch RGT — Return Gas Thermistor
SPT — Suction Pressure Transducer

Fig. 46 — Component Location — 30RAP035-060

DPT
B1
B2 HPS

DPT, HPS B3
(Not Shown
Located
Behind A1)

DTT RGT
SPT
A1
A2

Oil
A3 LEGEND
Sight Glass DPT — Discharge Pressure Thermostat
Discharge DTT — Discharge Temperature Thermistor
Access Valve HPS — High Pressure Switch
Only On RGT — Return Gas Thermistor
Size 080,090,115,130,150 Units SPT — Suction Pressure Transducer

Fig. 47 — Component Location — 30RAP070-150

Table 33 — Unit Torque Specification (see Fig. 50). The 30RAP010-060 units with Microchannel Heat
Exchanger (MCHX) condenser are not equipped with crankcase
FASTENER RECOMMENDED TORQUE heaters because the system refrigerant charge is less than the com-
Compressor Mounting Bolts 7 to 10 ft-lb  pressor manufacturer’s requirement.
(9.5 to 13.5 Nm)
24 to 28 in.-lb 
Crankcase heaters are required on all units installed with remote
Compressor Power Connections
(2.7- to 3.2 Nm) coolers. All 30RAP units with Round Tube/Plate Fin (RTPF) con-
Compressor Ground Terminal 14 to 18 in.-lb  denser coils will have crankcase heaters.
Connections (1.6 to 2.0 Nm) Be sure the crankcase heater is in contact with the shell at all
Crankcase Heater points. If the crankcase heater location has a vertical weld seam,
be sure to install the worm gear over the weld seam to ensure tight
The 30RAP011-150 units are equipped with crankcase heaters; contact of the heater to the shell. If the crankcase heater is not in
see Fig. 48-50. The 30RAP070-090 units utilize a 90-watt heater contact with the shell, it may result in a localized hot spot and pre-
on each compressor. See Fig. 49. The 30RAP100-150 units utilize mature failure of the crankcase heater. Refer to remote cooler in-
a 56-watt heater secured to the bottom of each compressor stallation instructions for more information.

59
 0.51-0.71 in. 0.55-0.95 in.
[13-18 mm] [14-24 mm]

Copeland ZP/ZPD103, 120, 137 Copeland ZP/ZPD154,182

Crankcase Heater Location Crankcase Heater Location

Copeland ZP72, 104 Crankcase Heater Location Copeland ZP51 Crankcase Heater Location
NOTE: Crankcase heater is factory option with RTPF condenser.

Fig. 48 — Crankcase Heater Location, 30RAP011-060 Units

B
A
A = 9/16 in. – 15/16 in.
B = 1/2 in. – 11/16 in.

Fig. 49 — Crankcase Heater Location, 30RAP070-090 Units

Heater Pad

Insulation

Retaining
Clips

Fig. 50 — Crankcase Heater Detail Under Compressor, 30RAP100-150 Units

60
Cooler Oil Charge
BRAZED-PLATE COOLER HEAT EXCHANGER
REPLACEMENT CAUTION
Brazed-plate heat exchangers cannot be repaired if they develop a
leak. If a leak (refrigerant or water) develops, the heat exchanger The compressor in a Puron® refrigerant (R-410A) system uses
must be replaced. To replace a brazed-plate heat exchanger: a polyolester (POE) oil. This is extremely hygroscopic, mean-
ing it absorbs water readily. POE oils can absorb 15 times as
1. Check that the replacement heat exchanger is the same as much water as other oils designed for HCFC and CFC refriger-
the original heat exchanger. The unit insulation covers the ants. Take all necessary precautions to avoid exposure of the
manufacturer’s part number. Make sure the depths of the oil to the atmosphere. Failure to do so could result in possible
replacement and original cooler heat exchangers are the equipment damage.
same.
2. Disconnect the liquid-in and liquid-out connections at the Puron refrigerant systems use a polyolester (POE) oil. Use only
heat exchanger. Carrier-approved compressor oil. Oil should be visible in com-
3. Recover the refrigerant from the system, and unsolder the pressor oil sight glass. An acceptable oil level is from 1/8 to 3/8 of
sight glass for unit size 010-090, and 3/4 to 7/8 of sight glass for
refrigerant-in and refrigerant-out connections. unit size 100-150. All compressors must be off when checking oil
4. Remove the old heat exchanger. Save the mounting hard- level. Recommended oil level adjustment method is as follows:
ware for use with the replacement heat exchanger. The
replacement heat exchanger is supplied fully insulated. It ADD OIL
also includes a cooler heater. Use of the heater is not Recover charge from the unit. Add oil to suction line Schrader
required unless the original cooler contained a factory- valve on tandem compressors sets and the compressor Schrader
installed heater. on the three-compressor circuits and single-compressor circuits.
5. Install the replacement heat exchanger in the unit and (See Fig. 45-47.) When oil can be seen at the bottom of the sight
attach the mounting bracket hardware to the fan uprights glass, add oil in 5 oz increments which is approximately 1/8 of oil
level. Run all compressors for 20 minutes then shut off to check
(sizes 010-030) or to the bottom bracket (sizes 035-150)
oil level. Repeat procedure until acceptable oil level is present.
using the hardware removed in Step 4. Reconnect the
cooler heater if required. For sizes 010-025, torque the NOTE: Use only Carrier-approved compressor oil.
• Oil Type . . . . . . . . . . . . . . . . Inhibited polyolester-based
bolts to 7 to 10 ft-lb (9.5 to 13.5 Nm). For sizes 030-150,
synthetic compressor lubricant.
torque the bolts to 30 to 50 ft-lb (40.6 to 67.7 Nm).
6. Carefully braze the refrigerant lines to the connections on • ISO Viscosity Grade . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
the heat exchanger. Lines should be soldered using silver Approved sources are:
as the soldering material with a minimum of 45% silver. UNIT SIZES 010-090
Keep the temperature below 1472°F (800°C) under nor- MANUFACTURER OIL
mal soldering conditions (no vacuum) to prevent the cop- Totaline. . . . . . . . . . . . . . . . . . . . . . 3MAF POE, P903-1601
per solder of the brazed plate heat exchanger from
changing its structure. Failure to do so can result in inter- Mobil . . . . . . . . . . . . . . . . . . . . . . . . . . EAL Arctic 32-3MA
nal or external leakage at the connections which cannot be Uniqema (ICI) . . . . . . . . . . . . . . . .Emkarate RL32-3MAF
repaired. Braze the liquid lines with a heat sink around the
expansion valve to protect it from excess heat. UNIT SIZES 100-150
7. Reconnect the water/brine lines. MANUFACTURER OIL
8. Dehydrate and recharge the unit. Check for leaks.
Totaline. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .P903-2401
BRAZED-PLATE COOLER HEAT EXCHANGER CLEANING Uniqema (ICI) . . . . . . . . . . . . . . . . . . . Emkarate RL 32H
Brazed-plate heat exchangers must be cleaned chemically. A pro- Do not reuse drained oil or any oil that has been exposed to the at-
fessional cleaning service skilled in chemical cleaning should be mosphere.
used. Use a weak acid (5% phosphoric acid, or if the heat ex-
changer is cleaned frequently, 5% oxalic acid). Pump the cleaning MCHX Coil Cleaning Instructions
solution through the exchanger, preferably in a backflush mode. Routine cleaning of coil surfaces is essential to maintain proper
After cleaning, rinse with large amounts of fresh water to dispose operation of the unit. Elimination of contamination and removal of
of all the acid. Cleaning materials must be disposed of properly. harmful residues will greatly increase the life of the coil and ex-
The factory-installed strainer screen in front of the water/brine in- tend the life of the unit.
lets of the heat exchangers should be cleaned periodically, depend- REMOVE SURFACE LOADED FIBERS
ing on condition of the chiller water/brine.
Surface loaded fibers or dirt should be removed with a vacuum
cleaner. If a vacuum cleaner is not available, a soft non-metallic
bristle brush may be used. In either case, the tool should be ap-
plied in the direction of the fins. Coil surfaces can be damaged (fin
edges can be bent over, broken away from the tube, damage to the
protective coating or e-coat of a protected coil) if the tool is ap-
plied across the fins.
NOTE: Use of a water stream, such as a garden hose, against a
surface loaded coil will drive the fibers and dirt into the coil. This
will make cleaning efforts more difficult. Surface loaded fibers
must be completely removed prior to using low velocity clean wa-
ter rinse.

61
PERIODIC CLEAN WATER RINSE Application Instructions
A periodic clean water rinse is very beneficial for coils that are ap- 1. Proper eye protection such as safety glasses is recommended
plied in coastal or industrial environments. However, it is very im- during mixing and application.
portant that the water rinse is made with very low velocity water 2. Remove all surface loaded fibers and dirt with a vacuum
stream to avoid damaging the fin edges. Monthly cleaning is cleaner as described above.
recommended.
3. Thoroughly wet finned surfaces with clean water and a low
ROUTINE CLEANING OF COIL SURFACES velocity garden hose, being careful not to bend fins.
Routine cleaning with Totaline® Indoor and Outdoor Coil Cleaner 4. Mix Totaline Indoor and Outdoor Coil Cleaner in a 2-1/2 gal-
is essential to extend the life of coils. This cleaner is available lon garden sprayer according to the instructions included with
from Carrier Replacement Components as part number P902- the cleaner. The optimum solution temperature is 100°F
0301 for a one-gallon container, and part number P902-0305 for a (38°C).
5 gallon container. It is recommended that all coils, including the
standard MCHX or E coated MCHX coils be cleaned with the To- NOTE: Do NOT USE water in excess of 130°F (54.4°C), as
taline Indoor and Outdoor Coil Cleaner as described below. Coil the enzymatic activity will be destroyed.
cleaning should be part of the unit’s regularly scheduled mainte- 5. Thoroughly apply Totaline Indoor and Outdoor Coil Cleaner
nance procedures to ensure long life of the coil. Failure to clean solution to all coil surfaces including finned area, tube sheets
the coils may result in reduced durability in the environment. and coil headers.
Avoid the use of: 6. Hold garden sprayer nozzle close to finned areas and apply
• coil brighteners cleaner with a vertical, up-and-down motion. Avoid spraying
• acid cleaning prior to painting in horizontal pattern to minimize potential for fin damage.
• high pressure washers 7. Ensure cleaner thoroughly penetrates deep into finned areas.
• poor quality water for cleaning 8. Interior and exterior finned areas must be thoroughly cleaned.
Totaline Indoor and Outdoor Coil Cleaner is non-flammable, hy- 9. Finned surfaces should remain wet with cleaning solution for
poallergenic, nonbacterial, and a USDA accepted biodegradable 10 minutes.
agent that will not harm the coil or surrounding components such
as electrical wiring, painted metal surfaces, or insulation. Use of 10. Ensure surfaces are not allowed to dry before rinsing. Reap-
non-recommended coil cleaners is strongly discouraged since coil ply cleaner as needed to ensure 10-minute saturation is
and unit durability could be affected. achieved.
TOTALINE INDOOR AND OUTDOOR COIL CLEANER 11. Thoroughly rinse all surfaces with low velocity clean water
INSTRUCTIONS using downward rinsing motion of water spray nozzle. Pro-
Required Equipment tect fins from damage from the spray nozzle.
• 2-1/2 gallon garden sprayer Round Tube Plate Fin (RTPF) Condenser Coil
• Water rinse with low velocity spray nozzle Maintenance and Cleaning Recommendations
Routine cleaning of coil surfaces is essential to maintain proper
operation of the unit. Elimination of contamination and removal of
CAUTION harmful residues will greatly increase the life of the coil and ex-
tend the life of the unit. The following maintenance and cleaning
Harsh chemicals, household bleach or acid or basic cleaners procedures are recommended as part of the routine maintenance
should not be used to clean coils of any kind. These cleaners activities to extend the life of the coil.
can be very difficult to rinse out of the coil and can accelerate
corrosion at the fin/tube interface where dissimilar materials REMOVE SURFACE LOADED FIBERS
are in contact. If there is dirt below the surface of the coil, use Surface loaded fibers or dirt should be removed with a vacuum
the Totaline Indoor and Outdoor Coil Cleaner as described cleaner. If a vacuum cleaner is not available, a soft non-metallic
below. bristle brush may be used. In either case, the tool should be ap-
plied in the direction of the fins. Coil surfaces can be easily dam-
aged (fin edges can be easily bent over and damage to the coating
CAUTION of a protected coil) if the tool is applied across the fins.
NOTE: Use of a water stream, such as a garden hose, against a
High velocity water from a pressure washer, garden hose, or surface loaded coil will drive the fibers and dirt into the coil. This
compressed air should never be used to clean a Round Tube/ will make cleaning efforts more difficult. Surface loaded fibers
Plate Fin coil. The force of the water or air jet will bend the fin must be completely removed prior to using low velocity clean
edges and increase airside pressure drop. water rinse.
Reduced unit performance or nuisance unit shutdown may PERIODIC CLEAN WATER RINSE
occur. A periodic clean water rinse is very beneficial for coils that are
applied in coastal or industrial environments. However, it is very
important that the water rinse is made with very low velocity
CAUTION water stream to avoid damaging the fin edges. Monthly cleaning
is recommended.
High velocity water from a pressure washer, garden hose, or ROUTINE CLEANING OF COIL SURFACES
compressed air should never be used to clean a MicroChannel
Heat Exchanger coil as it may fracture the tube/fin bond. Routine cleaning with Totaline® environmentally balanced coil
cleaner is essential to extend the life of coils. This cleaner is
Reduced unit performance or nuisance unit shutdown may available from Carrier Replacement parts division as part num-
occur. ber P902-0301 for a one-gallon container, and part number
P902-0305 for a 5-gallon container. It is recommended that all

62
coils, including the standard copper tube aluminum fin, pre- Check Unit Safeties
coated fin, copper fin, or e-coated coils be cleaned with the To-
taline environmentally balanced coil cleaner as described below. HIGH-PRESSURE SWITCH
Coil cleaning should be part of the unit’s regularly scheduled A high-pressure switch is provided to protect each compressor and
maintenance procedures to ensure long life of the coil. Failure to refrigeration system from unsafe high pressure conditions. See Ta-
clean coils may result in reduced durability in the environment. ble 34 for high-pressure switch settings.
Avoid the use of: The high-pressure switch is mounted in the discharge line of each
• coil brighteners circuit. If an unsafe, high-pressure condition should exist, the
switch opens and shuts off the affected circuit. The CSB senses the
• acid cleaning prior to painting
compressor feedback signal and generates an appropriate alarm.
• high pressure washers The MBB prevents the circuit from restarting until the alert condi-
• poor quality water for cleaning tion is reset. The switch should open at the pressure corresponding
Totaline environmentally balanced coil cleaner is non-flammable, to the appropriate switch setting as shown in Table 34.
hypoallergenic, nonbacterial, and a USDA accepted biodegrad- Table 34 — Factory Settings, High-Pressure Switch
able agent that will not harm the coil or surrounding components (Fixed)
such as electrical wiring, painted metal surfaces, or insulation. Use
of non-recommended coil cleaners is strongly discouraged since CUTOUT CUT-IN
UNIT
coil and unit durability could be affected. psig kPa psig kPa
30RAP 650 4482 500 3447

CAUTION Clear the alarm using the scrolling marquee display. The unit
should restart after the compressor anti-short-cycle delay, built
into the unit control module, expires.
Excessive water pressure will fracture the braze between air
centers and refrigerant tubes. PRESSURE TRANSDUCERS
Check Refrigerant Feed Components Each refrigerant circuit is equipped with a suction and discharge
pressure transducer. These inputs to the MBB are not only used to
FILTER DRIER monitor the status of the unit, but to also maintain operation of the
chiller within the compressor manufacturer’s specified limits. The
The function of the filter drier is to maintain a clean, dry system. input to the MBB from the suction pressure transducer is also used
The moisture indicator (described below) indicates any need to to protect the compressor from operating at low pressure condi-
change the filter drier. The filter drier is a sealed-type drier. When
tions and low superheat conditions. In some cases, the unit may
the drier needs to be changed, the entire filter drier must be not be able to run at full capacity. The control module will auto-
replaced. matically reduce the capacity of a circuit as needed to maintain
NOTE: Dual circuit (035-150 sizes) units have 1 filter drier per specified maximum/minimum operating pressures.
circuit.
COOLER FREEZE-UP PROTECTION
MOISTURE-LIQUID INDICATOR
The indicator is located immediately ahead of the EXV to provide CAUTION
an indication of the refrigerant moisture content. It also provides a
sight glass for refrigerant liquid. Clear flow of liquid refrigerant (at
full unit loading) indicates sufficient charge in the system. Bubbles On medium temperature brine units, the anti-freeze solution
must be properly mixed to prevent freezing at a temperature
in the sight glass (at full unit loading) indicate an undercharged sys-
of at least 15°F (8.3°C) below the leaving-fluid temperature
tem or the presence of noncondensables. Moisture in the system,
set point. Failure to provide the proper anti-freeze solution
measured in parts per million (ppm), changes the color of the indi- mixture may damage the cooler, water piping, and/or
cator as follows: hydronic package and is considered abuse and may impair or
Green (safe) — Moisture is below 75 ppm otherwise negatively impact the Carrier warranty.
Yellow-Green (caution) — 75 to 150 ppm
Yellow (wet) — above 150 ppm The main base board (MBB) monitors leaving fluid temperature at
The unit must be in operation at least 12 hours before the moisture all times. The MBB will rapidly remove stages of capacity as nec-
indicator gives an accurate reading, and must be in contact with essary to prevent freezing conditions due to the rapid loss of load
liquid refrigerant. At the first sign of moisture in the system, or low cooler fluid flow.
change the corresponding filter drier. When the cooler is exposed to lower ambient temperatures (34°F
NOTE: Dual circuit (035-150 sizes) units have one indicator per [1°C] or below), freeze-up protection is required using inhibited
circuit. ethylene or propylene glycol.
MINIMUM LOAD VALVE The input from the low pressure transducer provides additional
cooler freeze protection. The MBB shuts down the unit when a
On units equipped with the factory-installed capacity reduction low pressure condition exists that could cause the cooler to
option, a solenoid valve and discharge bypass valve (minimum freeze up.
load valve) are located between the discharge line and the cooler
entering-refrigerant line. The MBB cycles the solenoid to perform HEATER CABLE
minimum load valve function and the discharge bypass valve Optional factory-installed cooler and/or hydronic package heaters
modulates to the suction pressure set point and the valve. are cycled based on the input from the outside-air temperature sen-
The amount of capacity reduction achieved by the minimum load sor. These heaters, when installed, are designed to protect the cool-
valve is not adjustable. The total unit capacity with the minimum er and/or hydronic package from freezing down to –20°F (–29°C).
load valve is shown in Table 13. Power for these heaters is supplied from the main unit power.
PRESSURE RELIEF DEVICES
All units have one pressure relief device per circuit located in the
liquid line which relieves at 210°F (100°C).

63
 Resistance at various temperatures are listed in Tables 35-39. For
dual chiller operation, a dual chiller sensor is required which is a 5
CAUTION k thermistor. When a digital compressor is used, a DTT (digital
temperature thermistor) is used. The DTT is an 86 k thermistor.
Do not disconnect main unit power when servicing compres- REPLACING THERMISTORS (EWT, LWT, RGT)
sor(s) if ambient temperature is below 40°F (4.4°C) if the
chilled water loop is not protected with an appropriate concen- Add a small amount of thermal conductive grease to the thermis-
tration of an inhibited antifreeze solution. The compressors tor well and end of probe. For all probes, tighten the retaining nut
have a circuit breaker that can be used to shut off power to the 1/4 turn past finger tight. See Fig. 51 and 52. Insulate the thermis-
compressors. If the chilled water loop is not protected with an tor with cork tape or other appropriate insulating material.
appropriate concentration of an inhibited antifreeze solution THERMISTOR/TEMPERATURE SENSOR CHECK
and power to the unit must be off for a prolonged period, drain
the cooler, hydronic package (if installed) and internal piping. A high quality digital volt-ohmmeter is required.
Add glycol according to Winter Shutdown Step 2 below. Fail- 1. Connect the digital voltmeter across the appropriate
ure to do so may damage the cooler, water piping, and/or thermistor terminals at the J8 terminal strip on the Main
hydronic package. Base Board (see Fig. 52).
WINTER SHUTDOWN 2. Using the voltage reading obtained, read the sensor tem-
perature from Tables 35-39. Supply voltage to the thermis-
Do not shut off power disconnect during off-season shutdown. At tor should be 4 vdc ± 0.2 v with the thermistor
end of the cooling season: disconnected from the MBB.
1. Drain water from system. 3. To check thermistor accuracy, measure temperature at
2. Replace drain plug(s) and add sufficient inhibited ethylene probe location with an accurate thermocouple-type tem-
glycol solution (or other suitable inhibited antifreeze) to perature measuring instrument. Insulate thermocouple to
cooler, pump, and piping to prevent freezing of residual avoid ambient temperatures from influencing reading.
water. Do not drain the solution. Temperature measured by thermocouple and temperature
3. At the beginning of the next cooling season, be sure that determined from thermistor voltage reading should be
there is refrigerant pressure in each circuit before refilling close, ± 5°F (3°C) if care was taken in applying thermo-
the cooler. Then refill the cooler and add the recom- couple and taking readings.
mended inhibitor.
If a more accurate check is required, unit must be shut down and
Thermistors thermistor removed and checked at a known temperature (freezing
Electronic control uses up to five 5 kthermistors to sense tem- point or boiling point of water) using either voltage drop measured
peratures used to control operation of the chiller. Thermistors across thermistor at the J8 terminal, by determining the resistance
EWT, LWT, RGTA, RGTB, and OAT are identical in their tem- with chiller shut down and thermistor disconnected from J8. Com-
perature and voltage drop performance. The SPT space tempera- pare the values determined with the value read by the control in
ture thermistor has a 10 k input channel and it has a different set the Temperatures mode using the scrolling marquee display.
of temperature vs. resistance and voltage drop performance.

64
 Table 35 — 5K Thermistor Temperatures (°F) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, DLWT, RGT, and OAT)
VOLTAGE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE
TEMP DROP RESISTANCE DROP DROP
(F) (OHMS) (F) (OHMS) (F) (OHMS)
(V) (V) (V)
–25 3.699 98,010 59 1.982 7,686 143 0.511 1,190
–24 3.689 94,707 60 1.956 7,665 144 0.502 1,165
–23 3.679 91,522 61 1.930 7,468 145 0.494 1,141
–22 3.668 88,449 62 1.905 7,277 146 0.485 1,118
–21 3.658 85,486 63 1.879 7,091 147 0.477 1,095
–20 3.647 82,627 64 1.854 6,911 148 0.469 1,072
–19 3.636 79,871 65 1.829 6,735 149 0.461 1,050
–18 3.624 77,212 66 1.804 6,564 150 0.453 1,029
–17 3.613 74,648 67 1.779 6,399 151 0.445 1,007
–16 3.601 72,175 68 1.754 6,238 152 0.438 986
–15 3.588 69,790 69 1.729 6,081 153 0.430 965
–14 3.576 67,490 70 1.705 5,929 154 0.423 945
–13 3.563 65,272 71 1.681 5,781 155 0.416 925
–12 3.550 63,133 72 1.656 5,637 156 0.408 906
–11 3.536 61,070 73 1.632 5,497 157 0.402 887
–10 3.523 59,081 74 1.609 5,361 158 0.395 868
–9 3.509 57,162 75 1.585 5,229 159 0.388 850
–8 3.494 55,311 76 1.562 5,101 160 0.381 832
–7 3.480 53,526 77 1.538 4,976 161 0.375 815
–6 3.465 51,804 78 1.516 4,855 162 0.369 798
–5 3.450 50,143 79 1.493 4,737 163 0.362 782
–4 3.434 48,541 80 1.470 4,622 164 0.356 765
–3 3.418 46,996 81 1.448 4,511 165 0.350 750
–2 3.402 45,505 82 1.426 4,403 166 0.344 734
–1 3.386 44,066 83 1.404 4,298 167 0.339 719
0 3.369 42,679 84 1.382 4,196 168 0.333 705
1 3.352 41,339 85 1.361 4,096 169 0.327 690
2 3.335 40,047 86 1.340 4,000 170 0.322 677
3 3.317 38,800 87 1.319 3,906 171 0.317 663
4 3.299 37,596 88 1.298 3,814 172 0.311 650
5 3.281 36,435 89 1.278 3,726 173 0.306 638
6 3.262 35,313 90 1.257 3,640 174 0.301 626
7 3.243 34,231 91 1.237 3,556 175 0.296 614
8 3.224 33,185 92 1.217 3,474 176 0.291 602
9 3.205 32,176 93 1.198 3,395 177 0.286 591
10 3.185 31,202 94 1.179 3,318 178 0.282 581
11 3.165 30,260 95 1.160 3,243 179 0.277 570
12 3.145 29,351 96 1.141 3,170 180 0.272 561
13 3.124 28,473 97 1.122 3,099 181 0.268 551
14 3.103 27,624 98 1.104 3,031 182 0.264 542
15 3.082 26,804 99 1.086 2,964 183 0.259 533
16 3.060 26,011 100 1.068 2,898 184 0.255 524
17 3.038 25,245 101 1.051 2,835 185 0.251 516
18 3.016 24,505 102 1.033 2,773 186 0.247 508
19 2.994 23,789 103 1.016 2,713 187 0.243 501
20 2.972 23,096 104 0.999 2,655 188 0.239 494
21 2.949 22,427 105 0.983 2,597 189 0.235 487
22 2.926 21,779 106 0.966 2,542 190 0.231 480
23 2.903 21,153 107 0.950 2,488 191 0.228 473
24 2.879 20,547 108 0.934 2,436 192 0.224 467
25 2.856 19,960 109 0.918 2,385 193 0.220 461
26 2.832 19,393 110 0.903 2,335 194 0.217 456
27 2.808 18,843 111 0.888 2,286 195 0.213 450
28 2.784 18,311 112 0.873 2,239 196 0.210 445
29 2.759 17,796 113 0.858 2,192 197 0.206 439
30 2.735 17,297 114 0.843 2,147 198 0.203 434
31 2.710 16,814 115 0.829 2,103 199 0.200 429
32 2.685 16,346 116 0.815 2,060 200 0.197 424
33 2.660 15,892 117 0.801 2,018 201 0.194 419
34 2.634 15,453 118 0.787 1,977 202 0.191 415
35 2.609 15,027 119 0.774 1,937 203 0.188 410
36 2.583 14,614 120 0.761 1,898 204 0.185 405
37 2.558 14,214 121 0.748 1,860 205 0.182 401
38 2.532 13,826 122 0.735 1,822 206 0.179 396
39 2.506 13,449 123 0.723 1,786 207 0.176 391
40 2.480 13,084 124 0.710 1,750 208 0.173 386
41 2.454 12,730 125 0.698 1,715 209 0.171 382
42 2.428 12,387 126 0.686 1,680 210 0.168 377
43 2.402 12,053 127 0.674 1,647 211 0.165 372
44 2.376 11,730 128 0.663 1,614 212 0.163 367
45 2.349 11,416 129 0.651 1,582 213 0.160 361
46 2.323 11,112 130 0.640 1,550 214 0.158 356
47 2.296 10,816 131 0.629 1,519 215 0.155 350
48 2.270 10,529 132 0.618 1,489 216 0.153 344
49 2.244 10,250 133 0.608 1,459 217 0.151 338
50 2.217 9,979 134 0.597 1,430 218 0.148 332
51 2.191 9,717 135 0.587 1,401 219 0.146 325
52 2.165 9,461 136 0.577 1,373 220 0.144 318
53 2.138 9,213 137 0.567 1,345 221 0.142 311
54 2.112 8,973 138 0.557 1,318 222 0.140 304
55 2.086 8,739 139 0.548 1,291 223 0.138 297
56 2.060 8,511 140 0.538 1,265 224 0.135 289
57 2.034 8,291 141 0.529 1,240 225 0.133 282
58 2.008 8,076 142 0.520 1,214

65
 Table 36 — 5K Thermistor Temperatures (°C) vs. Resistance/Voltage Drop
(Voltage Drop for EWT, LWT, DLWT, RGT, and OAT)
VOLTAGE VOLTAGE VOLTAGE
TEMP RESISTANCE TEMP DROP RESISTANCE TEMP DROP RESISTANCE
(C) DROP (OHMS) (C) (OHMS) (C) (OHMS)
(V) (V) (V)
–32 3.705 100,260 15 1.982 7,855 62 0.506 1,158
–31 3.687 94,165 16 1.935 7,499 63 0.490 1,118
–30 3.668 88,480 17 1.889 7,161 64 0.475 1,079
–29 3.649 83,170 18 1.844 6,840 65 0.461 1,041
–28 3.629 78,125 19 1.799 6,536 66 0.447 1,006
–27 3.608 73,580 20 1.754 6,246 67 0.433 971
–26 3.586 69,250 21 1.710 5,971 68 0.420 938
–25 3.563 65,205 22 1.666 5,710 69 0.407 906
–24 3.539 61,420 23 1.623 5,461 70 0.395 876
–23 3.514 57,875 24 1.580 5,225 71 0.383 836
–22 3.489 54,555 25 1.538 5,000 72 0.371 805
–21 3.462 51,450 26 1.497 4,786 73 0.360 775
–20 3.434 48,536 27 1.457 4,583 74 0.349 747
–19 3.406 45,807 28 1.417 4,389 75 0.339 719
–18 3.376 43,247 29 1.378 4,204 76 0.329 693
–17 3.345 40,845 30 1.340 4,028 77 0.319 669
–16 3.313 38,592 31 1.302 3,861 78 0.309 645
–15 3.281 38,476 32 1.265 3,701 79 0.300 623
–14 3.247 34,489 33 1.229 3,549 80 0.291 602
–13 3.212 32,621 34 1.194 3,404 81 0.283 583
–12 3.177 30,866 35 1.160 3,266 82 0.274 564
–11 3.140 29,216 36 1.126 3,134 83 0.266 547
–10 3.103 27,633 37 1.093 3,008 84 0.258 531
–9 3.065 26,202 38 1.061 2,888 85 0.251 516
–8 3.025 24,827 39 1.030 2,773 86 0.244 502
–7 2.985 23,532 40 0.999 2,663 87 0.237 489
–6 2.945 22,313 41 0.969 2,559 88 0.230 477
–5 2.903 21,163 42 0.940 2,459 89 0.223 466
–4 2.860 20,079 43 0.912 2,363 90 0.217 456
–3 2.817 19,058 44 0.885 2,272 91 0.211 446
–2 2.774 18,094 45 0.858 2,184 92 0.204 436
–1 2.730 17,184 46 0.832 2,101 93 0.199 427
0 2.685 16,325 47 0.807 2,021 94 0.193 419
1 2.639 15,515 48 0.782 1,944 95 0.188 410
2 2.593 14,749 49 0.758 1,871 96 0.182 402
3 2.547 14,026 50 0.735 1,801 97 0.177 393
4 2.500 13,342 51 0.713 1,734 98 0.172 385
5 2.454 12,696 52 0.691 1,670 99 0.168 376
6 2.407 12,085 53 0.669 1,609 100 0.163 367
7 2.360 11,506 54 0.649 1,550 101 0.158 357
8 2.312 10,959 55 0.629 1,493 102 0.154 346
9 2.265 10,441 56 0.610 1,439 103 0.150 335
10 2.217 9,949 57 0.591 1,387 104 0.146 324
11 2.170 9,485 58 0.573 1,337 105 0.142 312
12 2.123 9,044 59 0.555 1,290 106 0.138 299
13 2.076 8,627 60 0.538 1,244 107 0.134 285
14 2.029 8,231 61 0.522 1,200

66
 Table 37 — 10K Thermistor Temperature (°F) vs. Resistance/Voltage Drop (For SPT)
VOLTAGE VOLTAGE VOLTAGE
TEMP DROP RESISTANCE TEMP DROP RESISTANCE TEMP DROP RESISTANCE
(F) (V) (OHMS) (F) (V) (OHMS) (F) (V) (OHMS)
–25 4.758 196,453 61 2.994 14,925 147 0.890 2,166
–24 4.750 189,692 62 2.963 14,549 148 0.876 2,124
–23 4.741 183,300 63 2.932 14,180 149 0.862 2,083
–22 4.733 177,000 64 2.901 13,824 150 0.848 2,043
–21 4.724 171,079 65 2.870 13,478 151 0.835 2,003
–20 4.715 165,238 66 2.839 13,139 152 0.821 1,966
–19 4.705 159,717 67 2.808 12,814 153 0.808 1,928
–18 4.696 154,344 68 2.777 12,493 154 0.795 1,891
–17 4.686 149,194 69 2.746 12,187 155 0.782 1,855
–16 4.676 144,250 70 2.715 11,884 156 0.770 1,820
–15 4.665 139,443 71 2.684 11,593 157 0.758 1,786
–14 4.655 134,891 72 2.653 11,308 158 0.745 1,752
–13 4.644 130,402 73 2.622 11,031 159 0.733 1,719
–12 4.633 126,183 74 2.592 10,764 160 0.722 1,687
–11 4.621 122,018 75 2.561 10,501 161 0.710 1,656
–10 4.609 118,076 76 2.530 10,249 162 0.699 1,625
–9 4.597 114,236 77 2.500 10,000 163 0.687 1,594
–8 4.585 110,549 78 2.470 9,762 164 0.676 1,565
–7 4.572 107,006 79 2.439 9,526 165 0.666 1,536
–6 4.560 103,558 80 2.409 9,300 166 0.655 1,508
–5 4.546 100,287 81 2.379 9,078 167 0.645 1,480
–4 4.533 97,060 82 2.349 8,862 168 0.634 1,453
–3 4.519 94,020 83 2.319 8,653 169 0.624 1,426
–2 4.505 91,019 84 2.290 8,448 170 0.614 1,400
–1 4.490 88,171 85 2.260 8,251 171 0.604 1,375
0 4.476 85,396 86 2.231 8,056 172 0.595 1,350
1 4.461 82,729 87 2.202 7,869 173 0.585 1,326
2 4.445 80,162 88 2.173 7,685 174 0.576 1,302
3 4.429 77,662 89 2.144 7,507 175 0.567 1,278
4 4.413 75,286 90 2.115 7,333 176 0.558 1,255
5 4.397 72,940 91 2.087 7,165 177 0.549 1,233
6 4.380 70,727 92 2.059 6,999 178 0.540 1,211
7 4.363 68,542 93 2.030 6,838 179 0.532 1,190
8 4.346 66,465 94 2.003 6,683 180 0.523 1,169
9 4.328 64,439 95 1.975 6,530 181 0.515 1,148
10 4.310 62,491 96 1.948 6,383 182 0.507 1,128
11 4.292 60,612 97 1.921 6,238 183 0.499 1,108
12 4.273 58,781 98 1.894 6,098 184 0.491 1,089
13 4.254 57,039 99 1.867 5,961 185 0.483 1,070
14 4.235 55,319 100 1.841 5,827 186 0.476 1,052
15 4.215 53,693 101 1.815 5,698 187 0.468 1,033
16 4.195 52,086 102 1.789 5,571 188 0.461 1,016
17 4.174 50,557 103 1.763 5,449 189 0.454 998
18 4.153 49,065 104 1.738 5,327 190 0.447 981
19 4.132 47,627 105 1.713 5,210 191 0.440 964
20 4.111 46,240 106 1.688 5,095 192 0.433 947
21 4.089 44,888 107 1.663 4,984 193 0.426 931
22 4.067 43,598 108 1.639 4,876 194 0.419 915
23 4.044 42,324 109 1.615 4,769 195 0.413 900
24 4.021 41,118 110 1.591 4,666 196 0.407 885
25 3.998 39,926 111 1.567 4,564 197 0.400 870
26 3.975 38,790 112 1.544 4,467 198 0.394 855
27 3.951 37,681 113 1.521 4,370 199 0.388 841
28 3.927 36,610 114 1.498 4,277 200 0.382 827
29 3.903 35,577 115 1.475 4,185 201 0.376 814
30 3.878 34,569 116 1.453 4,096 202 0.370 800
31 3.853 33,606 117 1.431 4,008 203 0.365 787
32 3.828 32,654 118 1.409 3,923 204 0.359 774
33 3.802 31,752 119 1.387 3,840 205 0.354 762
34 3.776 30,860 120 1.366 3,759 206 0.349 749
35 3.750 30,009 121 1.345 3,681 207 0.343 737
36 3.723 29,177 122 1.324 3,603 208 0.338 725
37 3.697 28,373 123 1.304 3,529 209 0.333 714
38 3.670 27,597 124 1.284 3,455 210 0.328 702
39 3.654 26,838 125 1.264 3,383 211 0.323 691
40 3.615 26,113 126 1.244 3,313 212 0.318 680
41 3.587 25,396 127 1.225 3,244 213 0.314 670
42 3.559 24,715 128 1.206 3,178 214 0.309 659
43 3.531 24,042 129 1.187 3,112 215 0.305 649
44 3.503 23,399 130 1.168 3,049 216 0.300 639
45 3.474 22,770 131 1.150 2,986 217 0.296 629
46 3.445 22,161 132 1.132 2,926 218 0.292 620
47 3.416 21,573 133 1.114 2,866 219 0.288 610
48 3.387 20,998 134 1.096 2,809 220 0.284 601
49 3.357 20,447 135 1.079 2,752 221 0.279 592
50 3.328 19,903 136 1.062 2,697 222 0.275 583
51 3.298 19,386 137 1.045 2,643 223 0.272 574
52 3.268 18,874 138 1.028 2,590 224 0.268 566
53 3.238 18,384 139 1.012 2,539 225 0.264 557
54 3.208 17,904 140 0.996 2,488
55 3.178 17,441 141 0.980 2,439
56 3.147 16,991 142 0.965 2,391
57 3.117 16,552 143 0.949 2,343
58 3.086 16,131 144 0.934 2,297
59 3.056 15,714 145 0.919 2,253
60 3.025 15,317 146 0.905 2,209

67
 Table 38 — 10K Thermistor Temperature (°C) vs. Resistance/Voltage Drop
(For SPT)

TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE TEMP VOLTAGE RESISTANCE

(C) DROP (OHMS) (C) DROP (OHMS) (C) DROP (OHMS)
(V) (V) (V)
–32 4.762 200,510 15 3.056 15,714 62 0.940 2,315
–31 4.748 188,340 16 3.000 15,000 63 0.913 2,235
–30 4.733 177,000 17 2.944 14,323 64 0.887 2,157
–29 4.716 166,342 18 2.889 13,681 65 0.862 2,083
–28 4.700 156,404 19 2.833 13,071 66 0.837 2,011
–27 4.682 147,134 20 2.777 12,493 67 0.813 1,943
–26 4.663 138,482 21 2.721 11,942 68 0.790 1,876
–25 4.644 130,402 22 2.666 11,418 69 0.767 1,813
–24 4.624 122,807 23 2.610 10,921 70 0.745 1,752
–23 4.602 115,710 24 2.555 10,449 71 0.724 1,693
–22 4.580 109,075 25 2.500 10,000 72 0.703 1,637
–21 4.557 102,868 26 2.445 9,571 73 0.683 1,582
–20 4.533 97,060 27 2.391 9,164 74 0.663 1,530
–19 4.508 91,588 28 2.337 8,776 75 0.645 1,480
–18 4.482 86,463 29 2.284 8,407 76 0.626 1,431
–17 4.455 81,662 30 2.231 8,056 77 0.608 1,385
–16 4.426 77,162 31 2.178 7,720 78 0.591 1,340
–15 4.397 72,940 32 2.127 7,401 79 0.574 1,297
–14 4.367 68,957 33 2.075 7,096 80 0.558 1,255
–13 4.335 65,219 34 2.025 6,806 81 0.542 1,215
–12 4.303 61,711 35 1.975 6,530 82 0.527 1,177
–11 4.269 58,415 36 1.926 6,266 83 0.512 1,140
–10 4.235 55,319 37 1.878 6,014 84 0.497 1,104
–9 4.199 52,392 38 1.830 5,774 85 0.483 1,070
–8 4.162 49,640 39 1.784 5,546 86 0.470 1,037
–7 4.124 47,052 40 1.738 5,327 87 0.457 1,005
–6 4.085 44,617 41 1.692 5,117 88 0.444 974
–5 4.044 42,324 42 1.648 4,918 89 0.431 944
–4 4.003 40,153 43 1.605 4,727 90 0.419 915
–3 3.961 38,109 44 1.562 4,544 91 0.408 889
–2 3.917 36,182 45 1.521 4,370 92 0.396 861
–1 3.873 34,367 46 1.480 4,203 93 0.386 836
0 3.828 32,654 47 1.439 4,042 94 0.375 811
1 3.781 31,030 48 1.400 3,889 95 0.365 787
2 3.734 29,498 49 1.362 3,743 96 0.355 764
3 3.686 28,052 50 1.324 3,603 97 0.345 742
4 3.637 26,686 51 1.288 3,469 98 0.336 721
5 3.587 25,396 52 1.252 3,340 99 0.327 700
6 3.537 24,171 53 1.217 3,217 100 0.318 680
7 3.485 23,013 54 1.183 3,099 101 0.310 661
8 3.433 21,918 55 1.150 2,986 102 0.302 643
9 3.381 20,883 56 1.117 2,878 103 0.294 626
10 3.328 19,903 57 1.086 2,774 104 0.287 609
11 3.274 18,972 58 1.055 2,675 105 0.279 592
12 3.220 18,090 59 1.025 2,579 106 0.272 576
13 3.165 17,255 60 0.996 2,488 107 0.265 561
14 3.111 16,464 61 0.968 2,400

Table 39 — 86K Thermistor vs Resistance (DTT)

TEMP TEMP RESISTANCE TEMP TEMP RESISTANCE
(C) (F) (OHMS) (C) (F) (OHMS)
–40 –40 2,889,600 75 167 12,730
–35 –31 2,087,220 80 176 10,790
–30 –22 1,522,200 85 185 9,200
–25 –13 1,121,440 90 194 7,870
–20 –4 834,720 95 203 6,770
–15 5 627,280 100 212 5,850
–10 14 475,740 105 221 5,090
–5 23 363,990 110 230 4,450
0 32 280,820 115 239 3,870
5 41 218,410 120 248 3,350
10 50 171,170 125 257 2,920
15 59 135,140 130 266 2,580
20 68 107,440 135 275 2,280
25 77 86,000 140 284 2,020
30 86 69,280 145 293 1,800
35 95 56,160 150 302 1,590
40 104 45,810 155 311 1,390
45 113 37,580 160 320 1,250
50 122 30,990 165 329 1,120
55 131 25,680 170 338 1,010
60 140 21,400 175 347 920
70 158 15,070 180 356 830

68
 5/8 in. HEX 1/4-18 NPT

6" Minimum
Clearance for
Thermistor
Removal

Install Nut and Seal

on Thermistor. Apply
Thermal Conductive Loop Wire Harness and
Grease to Thermistor Secure with Wire Tie
and Well. Insert to Form Strain Relief.
Thermistor into Well.
Insulate with
Cork Tape
Insulation.

Fig. 51 — Thermistor Well and Return Gas Thermistor (RGT) Mounting

1 RGTA
1 RED
2
2 BLK
3 RGTB
3 RED
4 LVT
4 BLK J12 T55
5
5 BLU 3 23
T-55
6 SEN
ACCSY
6 BLU 4 22
1 OAT
7 RED
SPACE TEMPERATURE
2 ACCESSORY OR
8 BLK DUAL CHILLER LWT
3
9
4
10
1 EVAPORATOR ENTERING
11 RED FLUID TEMP
2
12 BLK

J8 13
3
RED
EVAPORATOR LEAVING
FLUID TEMP
4
14 BLK
1 B
15 RED
2 C +
16 GRN DPTB
3 A -
17 BLK
4 B
18 RED
5 C +
19 GRN SPTB
6 A -
20 BLK
7 B
21 RED
8 C +
22 GRN DPTA
9 A -
23 BLK
10 B
24 RED
11 C +
25 GRN SPTA
12 A -
26 BLK

LEGEND
ACCSY — Accessory
DPT — Discharge Pressure Transducer
LWT — Leaving Water Temperature Sensor
LVT — Low Voltage Terminal
OAT — Outdoor Air Temperature Sensor
RGT — Return Gas Temperature Sensor
SEN — Sensor Terminal Block
SPT — Space Temperature Sensor

Fig. 52 — Thermistor Connections to Main Base Board, J8 Connector

69
Pressure Transducers The difference in temperature between the two thermistors pro-
The suction and discharge transducers are different part numbers vides a measurement of fluid velocity past the sensor probe. When
and can be distinguished by the color of the transducer body, fluid velocity is high, more heat will be carried away from the
suction (yellow) and discharge (red). No pressure transducer heated thermistor and the temperature differential will be small.
calibration is required. The transducers operate on a 5 vdc supply, As fluid velocity decreases, less heat will be taken from the heated
which is generated by the main base board (MBB). See Fig. 52 for thermistor and there will be an increase in temperature differential.
transducer connections to the J8 connector on the MBB. When unit flow rate is above the flow switch set point, then the
output is switched on, sending 24 vac to the MBB to prove flow
TROUBLESHOOTING has been established.
If a transducer is suspected of being faulty, first check supply volt- For recommended maintenance, check the sensor tip for build-up
age to the transducer. Supply voltage should be 5 vdc ± 0.2 v. If every 6 months. Clean the tip with a soft cloth. If necessary, build-
supply voltage is correct, compare the pressure reading displayed up (e.g., lime) can be removed with a common vinegar cleansing
on the scrolling marquee display module against pressure shown agent.
on a calibrated pressure gauge. Pressure readings should be within
This flow switch is equipped with status LEDs display. When
± 15 psig. If the two readings are not reasonably close, replace the power is supplied to the device, an initialization period is started.
pressure transducer. During this period, all indicator LEDs are lit green and then turn
Chilled Water Flow Switch off from 9 to 0 as the initialization period ends.
A factory-installed flow switch is installed in the leaving fluid pip- Once the initialization period is completed, the normal status LED
ing for all units without the factory-installed hydronic package. sequence begins. If the flow is below the switch with increasing
See Fig. 53. flow, sequential LEDs are lit. If the flow switch is open, LED 4
will be red. If the flow switch is closed, LED 4 will be orange. Ta-
Units with the optional hydronic package have the flow switch in- ble 40 indicates the status of the switch.
stalled in the entering fluid piping. This is a thermal dispersion
flow switch with field adjustments. The switch is set for approxi-
mately 0.5 ft/sec of flow. The sensor tip houses two thermistors Table 40 — Status of the Switch
and a heater element. One thermistor is located in the sensor tip, Operating Indicators Switch Status
closest to the flowing fluid. This thermistor is used to detect Status LEDs
changes in the flow velocity of the liquid. The second thermistor is
bonded to the cylindrical wall and is affected only by changes in
the temperature of the liquid. The thermistors are positioned to be Current flow below the display range
in close contact with the wall of the sensor probe and, at the same
time, to be kept separated from each other within the confines of
the probe.
Current flow below the switch point
1 2
Ø50 63

Current flow corresponds to the

switch point.
27
M12 x 1

Current flow above the switch point.

Current flow above the display

113

range.
14

Mode Indicators
22
65

Default Factory Setting restoration

60

All LEDs are solid Orange

3 initiated.
45

Default Factory Setting restoration

All LEDs are flashing Orange in progress.
No LEDs will be lit for the following
conditions:
• Manual set point correction has
Ø8.2 Display OFF (no LED lights) been initiated
1 — LED Display • Default Factory Setting restored
2 — Setting Pushbuttons • No power to flow switch
3 — Tightening Torque 25 Nm • The switch has failed
Automatic adjustment not
All LEDs are flashing Red successful. The switch point is
outside the measuring range.
Fig. 53 — Chilled Water Flow Switch
In order to sense flow, it is necessary to heat one of the thermistors — LED lights green
in the probe. When power is applied, the tip of the probe is heated. — LED lights orange
As the fluid starts to flow, heat will be carried away from the sen-
sor tip. Cooling of the first thermistor is a function of how fast heat — LED lights red
is conducted away by the flowing liquid.
— LED lights flashes

70
FLOW SWITCH SET POINT ADJUSTMENT If nuisance trips of the sensor are occurring, follow the steps
This thermal dispersion flow switch has the ability to adjust the below to correct the situation:
flow trip point. This operation should only be completed after 1. Check to confirm that the factory-installed strainer is
troubleshooting and flow has been confirmed to be adequate. clean. Use the blowdown valve provided or remove the
screen and clean it. In the case of VFD controlled pumps,
ensure that the minimum speed setting has not been
CAUTION changed.
Adjusting the flow switch set point to below the recommended 2. Measure the pressure drop across the cooler or cooler/pump
minimum flow can result in cooler freeze-up and damage to system and compare this to the system requirements.
the system. Operation below minimum flow is not 3. Verify that cable connections at the switch and at the terminal
recommended. Damage caused by operation below minimum block are secure.
flow may be considered abuse of the systems and is not
covered under warranty. 4. For factory-installed hydronic systems, verify that:
a. All air has been purged from the system.
FLOW SWITCH PARAMETER SETTING
b. Circuit setter balance valve has been correctly set.
Set-up
5. Pump impeller has been improperly trimmed and is not pro-
1. Supply voltage to flow switch from chiller 24V control. viding sufficient flow.
a. All LEDs will be on and go out again step by step.
6. Wrong pump motor rotation. Pump must rotate clockwise
b. During this time the output is closed. when viewed from motor end of pump.
c. The switch is not in the operating mode.
2. Change the switch point (optional). Strainer
NOTE: Changing the switch set point is not recommended. Periodic factory-installed strainer cleaning is required. Pressure
drop across strainer in excess of 3 psi (21 kPa) indicates the need
The switch can be adjusted for flow fluctuation or pulsation
conditions that require a faster response time. Use a low for cleaning. Normal (clean) pressure drop is approximately 1 psi
switch point for fast response with rising flow; use a high (6.9 kPa). Open the factory-installed blowdown valve to clean the
strainer. If required, shut the chiller down and remove the strainer
switch point for fast response with falling flow.
screen to clean. When strainer has been cleaned, enter “YES” for
a. To set switch set point, press the pushbutton – or +. Strainer Maintenance Done (Run StatusPMS.T.MN).
b. All LEDs are off.
Condenser Fans
c. Press the pushbutton – or + as often as required. Each
press of the pushbutton shifts the flow by one half LED Two types of condenser fans are offered in the 30RAP units: metal
in the indicated direction. (value sound) fans, and AeroAcoustic™ (low sound) fans. Each
fan is supported by a formed wire mount bolted to a fan deck and
d. As soon as a button is pressed, the LEDs switch on. The covered with a wire guard.
LEDs of the current set value will flash.
If no pushbutton is pressed for 2 s, the unit returns to the oper- METAL (VALUE SOUND) FANS
ating mode with the newly set value. The exposed end of fan motor shaft is protected from weather by
3. Restore the factory setting (reset). grease and a rubber boot. If fan motor must be removed for service
a. Press the + button for at least 15 s. or replacement, when reinstalling the motor be sure to mount the
motor band in the proper location, re-grease fan shaft, and reinstall
b. All LEDs first light orange, then flash orange. fan guard. The fan hub must be facing up. For proper performance
c. Release the button. with the value sound fan option, fan web should be 0.32 in.
d. All settings are reset to the factory setting: Switch point: (8 mm) below top of orifice on the fan deck to top of the fan hub.
20 cm/s. Tighten set screws to 15 ± 2 ft-lb (20 ± 2.7 Nm). Figure. 54
shows the proper position of mounted fan.
e. If set point is not locked, all LEDs go off for 2 s.
4. Lock / unlock the switch.
IMPORTANT: Check for proper fan rotation (clockwise when
The switch can be locked electronically to prevent uninten- viewed from above). If necessary, switch any 2 power leads to
tional settings. reverse fan rotation. The anti-rotation tab must be located to the
a. Press both setting buttons – and + simultaneously for left and adjacent to the motor mounting rod.
10 s in the operating mode.
b. The indicator LED lights will go out; the switch settings 0.32 ± 0.12 in. (8 ± 3 mm)
will lock or unlock. Replacement switch setting is in not- Measure from Fan Web Top to Top of Fan Deck Orifice.

locked status when supplied. Switch setting is set and

locked from factory.
The flow sensor cable is provided with 3 LEDs that indicate if
24 vac power is present and also status of the switch contacts. The
LEDs are as follows: Fan Deck

• Green LED ON – 24 vac present

• One Yellow LED ON – Flow sensor switch OPEN
• Two Yellow LEDs ON – Flow sensor switch CLOSED 7.00 in. (178 mm)
Min.

Fig. 54 — Metal (Value Sound) Fan Mounted Position

71
AEROACOUSTIC™ (LOW SOUND) FANS Apply Loctite 680 Retaining
Two designs have been used for this option and can be distin- Compound to Keyway (Only)
guished by the mounting bolt color. Two separate processes are Immediately Before Installing Key
used depending on the design revision. A shroud and a wire guard
provide protection from the rotating fan.

Check for proper fan rotation (counterclockwise when viewed

from above). If necessary, switch any 2 power leads to reverse a38-7327
fan rotation.
Gray Bolt
The fan motor has a step in the motor shaft. For proper perfor- Fig. 57 — AeroAcoustic Fan (Black Bolt)
mance, fan should be positioned such that it is securely seated on Fan Motor Keyway
this step. See Fig. 55. Tighten bolt to 15 ± 2 ft-lb (20 ± 2.7 Nm).
Figure 55 shows the proper position of mounted fan.
Black Bolt Torque Bolts 24 ± 2 ft-lb
(32.5 ± 2.7 N-m)
To remove the fan, a fan puller will likely be needed. The fan mo-
tor shaft is protected from weather by the fan cover. If fan motor
must be removed for service or replacement, be sure to mount the
motor band in the proper location when reinstalling motor. Do not
use grease on the shaft or key. The fan motor has a step in the mo-
tor shaft. For proper performance, fan should be positioned such
that it is securely seated on this step. Apply Loctite 680 Retaining Fan Deck
Compound to the hub and motor keyway only, prior to installing
the key. See Fig. 56 and 57. Tighten bolt to 24 ± 2 ft-lb (32.5 ±
2.7 Nm). Figure 58 shows the proper position of mounted fan.
7.00 in. (178 mm)
Torque Bolts Min.
15 ± 2 ft-lb
(20 ± 2.6 N-m)
Fan Cap
Fig. 58 — AeroAcoustic Fan (Black Bolt)
Mounted Position
Motormaster® V Controller
The Motormaster V (MMV) controller is standard on size 010
and 015 units. For other sizes, the Motormaster V controller is
a factory-installed option or field-installed accessory. The
Fan Motormaster V controller uses an input signal from the AUX
Deck board to determine the fan speed. See Fig. 59.
7.00 in. (178 mm) MOTORASTER V CONTROLLER START-UP FOLLOW-
Min. ING EXTENDED SHUTDOWN
If input power has not been applied to the Motormaster V con-
Fig. 55 — AeroAcoustic Fan (Gray Bolt) troller for a period exceeding three years (due to storage, etc.),
Mounted Position the electrolytic DC bus capacitors within the drive can change
internally, resulting in excessive leakage current. This can re-
Apply Loctite 680 Retaining Compound sult in premature failure of the capacitors if the drive is operat-
to Fan Hub Keyway (Only) Immediately ed after such a long period of inactivity or storage.
Before Installing Fan on Motor Shaft To reform the capacitors and prepare the drive for operation af-
ter a long period of inactivity, apply input power to the drive
for 8 hours prior to operating the motor. Before attempting to
operate the drive or the motor, be sure all procedures pertaining
to installation and wiring have been properly followed.
MOTORMASTER V CONTROLLER DIAGNOSTICS
The controller is factory configured and requires no field pro-
gramming. If a situation arises where the drive does not func-
Fig. 56 — AeroAcoustic Fan (Black Bolt) tion properly, the information provided below and in Table 41
Fan Hub Keyway can be used to troubleshoot the drive.

WARNING

Hazard of electrical shock. Wait three minutes after discon-

necting incoming power before servicing drive. Capacitors
retain charge after power is removed. Drive assembly includes
externally mounted current limiting resistors. Use extreme
caution when servicing the drive. Failure to comply may result
in personal injury.

72
 WARNING CAUTION

When configured as shown in this literature, this equipment is DO NOT connect incoming AC power to output terminals T1,
designed to start when it receives line power. Ensure that all T2, and T3. Severe damage to the drive will result. Do not
personnel are clear of fans and guards are installed before continuously cycle input power to the drive more than once
applying power. Failure to comply may result in personal every two minutes. Damage to the drive will result.
injury.

CAUTION
WARNING
If input power has not been applied to the drive for a period of
The opening of a branch-circuit protective device may be an time exceeding three years (due to storage, etc.), the electro-
indication that a fault has been interrupted. To reduce the risk lytic DC bus capacitors within the drive can change internally,
of fire or electric shock, current carrying parts and other com- resulting in excessive leakage current. This can result in pre-
ponents of the controller should be examined and replaced if mature failure of the capacitors if the drive is operated after
damaged. such a long period of inactivity or storage. In order to reform
the capacitors and prepare the drive for operation after a long
period of inactivity, apply input power to the drive for 8 hours
prior to actually operating the motor. Before attempting to
operate the drive, motor, and driven equipment, be sure all
procedures pertaining to installation and wiring have been
properly followed. Failure to comply may result in equipment
damage.

LOW AMBIENT OPERATION (MOTORMASTER V) FIOP/ACCESSORY

FB3 FB1 MM-A

L1 T1
1
BLK 11 21 BLK 11 21 BLK BLK-1

2
YEL 12 22 YEL 12 22 YEL L2 T2 BLK-2 OFM1
3
BLU 13 23 BLU 13 23 BLU L3 T3 BLK-3 GRN/YEL
HIGH SCCR 2 YEL
ONLY MMR * MM SIGNAL CONNECTION
*1 VIO 11 14 TB VOLTAGE HZ
240 1/4W 1 208/230/460/575 60
25 RED FROM 13A 380 60
2 BLK AUX-J4

FB2
FC2 1
BLK 11 21 BLK 11 21 BLK-1

2
YEL 12 22 YEL 12 22 BLK-2 OFM2
3
BLU 13 23 BLU 13 23 BLK-3 GRN/YEL

To Cooler Heater/
Pump Heater

LEGEND CONFIGURATION TABLE

AUX — Auxiliary MODE NOMINAL VOLTAGE Hz CONTROL INPUT (PINS 25, 2) START JUMPER
FB — Fuse Block
MM — Motormaster 5 208/230/460/575a 60 External control 4-20 mA TB1-TB2
MMR — Motormaster Relay 208/380 60 External control 4-20 mA TB13A-TB2
OFM — Outdoor Fan Motor 6
380/415-50 50 External control 4-20 mA TB13C-TB2
SCCR — Short Circuit Current Rating
TB — Terminal Block NOTE(S):
a. 208-v can run in mode 5 or 6.

Fig. 59 — Typical Motormaster Wiring

73
 Table 41 — Fault Codes
FAULT CODE DESCRIPTION SOLUTION
AF High Temperature Fault: Ambient temperature is too high; Check cooling fan operation
Cooling fan has failed (if equipped).
CF Control Fault: A blank EPM, or an EPM with corrupted data Perform a factory reset using Parameter 48 —
has been installed. PROGRAM SELECTION.
cF Incompatibility Fault: An EPM with an incompatible parameter Either remove the EPM or perform a factory
version has been installed. reset (Parameter 48) to change the parameter
version of the EPM to match the parameter ver-
sion of the drive.
CL CURRENT LIMIT: The output current has exceeded the Check for loose electrical connections.
CURRENT LIMIT setting (Parameter 25) and the drive is Check for faulty condenser fan motor.
reducing the output frequency to reduce the output current. If Check Parameter P25 from Table 42 is set cor-
the drive remains in CURRENT LIMIT too long, it can trip into rectly.
a CURRENT OVERLOAD fault (PF).
ER ERROR: Invalid data has been entered or an invalid com-
mand was attempted.
GF Data Fault: User data and OEM defaults in the EPM are cor- Restore factory defaults P48, see section
rupted. above. If that does not work, replace EPM.
HF High DC Bus Voltage Fault: Line voltage is too high; Deceler- Check line voltage — set P01 appropriately.
ation rate is too fast; Overhauling load.
JF Serial Fault: The watchdog timer has timed out, indicating that Check serial connection (computer).
the serial link has been lost. Check settings for P15.
Check settings in communication software to
match P15.
LC FAULT LOCKOUT: The drive has failed three restart attempts
and requires a manual reset.
LF Low DC Bus Voltage Fault: Line voltage is too low. Check line voltage — set P01 appropriately.
OF Output Transistor Fault: Phase to phase or phase to ground Reduce boost or increase acceleration values. If
short circuit on the output; Failed output transistor; Boost set- unsuccessful, replace drive.
tings are too high; Acceleration rate is too fast.
PF Current Overload Fault: VFD is undersized for the application; Check line voltage — set P01 appropriately.
Mechanical problem with the driven equipment. Check for dirty coils.
Check for motor bearing failure.
SF Single-phase Fault: Single-phase input power has been Check input power phasing.
applied to a three-phase drive.
SP START PENDING: “SP” blinks during the interval between
restart attempts.
F1 EPM Fault: The EPM is missing or damaged.
F2-F9, Fo Internal Faults: The control board has sensed a problem. Consult factory.
Drive display = 60.0 even though it is Feedback signal is above set point. Check for proper set point.
cold outside and it should be running Check liquid line pressure.
slower
Drive display = “---” even though Start jumper is missing. Replace start jumper. See section above.
drive should be running
Drive display = 8.0 even though fan Feedback signal is below set point and fan is at minimum Check for proper set point.
should be running faster speed. Check liquid line pressure.
VFD flashes 57 and LCS Feedback or speed signal lost. Drive will operate at 57 Hz In stand alone mode: Check transducer wiring
until reset or loss of start command. Resetting requires and feedback voltage. Feedback voltage dis-
cycling start command (or power). played on P-69. Pin 6 should be 5 v output. Pin
5 (feedback) should be somewhere between 0
and 5 v.
LEGEND
EPM — Electronic Programming Module
LCS — Lost Control Signal
OEM — Original Equipment Manufacturer
VFD — Variable Frequency Drive

GENERAL OPERATION CONFIGURATION

The speed varies in proportion to a 0 to 10 vdc signal produced by The MMV is configured for 1 of 12 operation modes based on the
the ComfortLink controls. MMV output speed is displayed in Hz. inputs to the control terminal block. The 30RAP units use operat-
The ComfortLink controls must be configured for MMV opera- ing modes 5-8. In these configurations, the MMV follows a 4 to
tion in order for it to operate. This is configured under the Config- 20 mA speed reference signal present on terminals 25 (+) and 2
uration menu (ConfigurationMMMMR.S) and selecting (–). The Aux board generates a 2 to 10 vdc signal that is converted
“1=LOW AMBIENT.” This configuration menu also contains the to a 4 to 20 mA signal by means of a 240  1/4 w resistor in series
gains and minimum speed for the Motormaster control logic. with the positive (+) signal wire. One additional jumper is re-
quired to configure the drive for 50/60 Hz operation and input
voltage. See Table 42 for proper inputs. Once the drive is pow-
ered, it will change to the mode selected according to the inputs.
See Fig. 60.

74
 Table 42 — Motormaster® V Program Parameters for Operating Modes
PARAMETERS DESCRIPTION MODE 5 MODE 6 MODE 7 MODE 8
P01 Line Voltage: 01 = low line, 02 = high line 01 02 01 02
P02 Carrier Freq: 01 = 4 kHz, 02 = 6 kHz, 03 = 8 kHz 01 01 01 01
P03 Startup mode: flying restart 06 06 06 06
P04 Stop mode: coast to stop 01 01 01 01
Standard Speed source: 01= keypad, 
P05 04 04 04 04
04=4-20mA (NO PI), 05= R22, 06=R134a
P06 TB-14 output: 01 = none 01 01 01 01
P08 TB-30 output: 01 = none 01 01 01 01
P09 TB-31 Output: 01 = none 01 01 01 01
P10 TB-13A function sel: 01 = none 01 01 01 01
P11 TB-13B function sel: 01 = none 01 01 01 01
P12 TB-13C function sel: 01 = none 01 01 01 01
P13 TB-15 output: 01 = none 01 01 01 01
P14 Control: 01 = Terminal strip 01 01 01 01
P15 Serial link: 02 = enabled 9600,8,N,2 with timer 02 02 02 02
P16 Units editing: 02 = whole units 02 02 02 02
P17 Rotation: 01 = forward only, 03 = reverse only 01 01 01 01
P19 Acceleration time: 10 sec 10 10 10 10
P20 Deceleration time: 10 sec 10 10 10 10
P21 DC brake time: 0 0 0 0 0
P22 DC BRAKE VOLTAGE 0% 0 0 0 0
P23 Min freq = 8 Hz ~ 100 – 160 rpm 8 8 8 8
P24 Max freq 60 60 50 50
P25 Current limit: (%) 125 110 125 110
P26 Motor overload: 100 100 100 100 100
P27 Base freq: 60 or 50 Hz 60 60 50 50
P28 Fixed boost: 0.5% at low frequencies 0.5 0.5 0.5 0.5
P29 Accel boost: 0% 0 0 0 0
P30 Slip compensation: 0% 0 0 0 0
P31 Preset spd #1: speed if loss of control signal 57 57 47 47
P32 Preset spd #2: 0 0 0 0 0
P33 Preset spd #3: 0 0 0 0 0
P34 Preset spd 4 default — R22 set point. TB12-2 open 18.0 18.0 18.0 18.0
P35 Preset spd 5 default — R134a set point. TB12-2 closed 12.6 12.6 12.6 12.6
P36 Preset spd 6 default 0 0 0 0
P37 Preset spd 7 default 0 0 0 0
P38 Skip bandwidth 0 0 0 0
P39 Speed scaling 0 0 0 0
P40 Frequency scaling 50 or 60 Hz 60 60 50 50
P41 Load scaling: default (not used so NA) 200 200 200 200
P42 Accel/decel #2: default (not used so NA) 60 60 60 60
P43 Serial address 1 1 1 1
P44 Password:111 111 111 111 111
P45 Speed at min signal: 8 Hz; used when PID mode is disabled 8 8 8 8
and 4-20mA input is at 4 mA
Speed at max feedback: 60 or 50 Hz. Used 
P46 60 60 50 50
when PID disabled and 4-20mA input is at 20 mA
P47 Clear history? 01 = maintain. (set to 02 to clear) 01 01 01 01
P48 Program selection: Program 1 – 12 05 06 07 08
P61 PI Mode: 05= reverse, 0-5V, 01 = no PID 01 01 01 01
P62 Min feedback = 0 (0V *10) 0 0 0 0
P63 Max feedback = 50 (5V * 10) 50 50 50 50
P64 Proportional gain = 4% 4 4 4 4
P65 Integral gain = .2 .2 .2 .2 .2
P66 PI accel/decel (set point change filter) = 5 5 5 5 5
P67 Min alarm 0 0 0 0
P68 Max alarm 0 0 0 0
P69 0 - 10 VDC Feedback NA NA NA NA
LEGEND
NA — Not Applicable
PID — Proportional Integral Derivative
TB — Terminal Block

75
 EPM L1 L2 L3

Mode
DANGER

MMV
TERMINAL
BLOCK

T1 T2 T3 B- B+

BUTTONS DISPLAY
LEGEND
EPM — Electronic Programming Module
Mode MMV — Motormaster V

Fig. 60 — Motormaster® V Mode Buttons and Mode Display

DRIVE PROGRAMMING before exiting). If the Mode button is pressed within two min-
utes of exiting the PROGRAM mode, the password is not
CAUTION required to access the parameters. After two minutes, the
password must be entered in order to access the parameters
It is strongly recommended that the user NOT change any pro- again.
gramming without consulting Carrier service personnel. Unit The drive uses an electronic programming module (EPM) chip to
damage may occur from improper programming. store the program parameters. This is an EPROM memory chip
and is accessible from the front of the Motormaster V. It should
To change parameter values of the Motormaster V controller: not be removed with power applied to the VFD. See Fig. 60.
1. To enter the PROGRAM mode to access the parameters, Motormaster V Drive Password Configuration
press the Mode button. This will activate the password Changing the password is not recommended. Once the password
prompt (if the password has not been disabled). The dis- is changed, there is no means to retrieve the new password if it is
play will read “00” and the upper right-hand decimal point lost. A new EPM chip must be installed.
will be blinking. See Fig. 60. To change password, follow the parameter changing instructions
2. Use the up and down arrow buttons to scroll to the password in the section Changing Motormaster V Parameters above.
value (the factory default password is 111) and press the Change parameter P44 to the desired password. Setting P44 to 000
Mode button to accept the value. disables the password function. Valid range for the password is
000 to 999.
3. Once the correct password value is entered, the display will
read P01, which indicates that the PROGRAM mode has EPM CHIP
been accessed. P01 is the first parameter. The drive uses a electronic programming module (EPM) chip to
NOTE: If the display flashes “Er,” the password was incor- store the program parameters. This is an EEPROM memory chip
rect and the process to enter the password must be repeated. and is accessible from the front of the VFD. It should not be re-
moved with power applied to the VFD.
4. Use the up and down arrow buttons to scroll to the desired
parameter number. LOSS OF CCN COMMUNICATIONS
5. Once the desired parameter number is found, press the Mode Carrier Comfort Network® (CCN) communications with external
button to display the present parameter setting. The upper control systems can be affected by high frequency electrical noise
right-hand decimal point will begin blinking, indicating that generated by the Motormaster V controller. Ensure unit is well
the present parameter setting is being displayed, and that it grounded to eliminate ground currents along communication
can be changed by using the up and down buttons. Use the up lines.
and down arrow buttons to change setting. Press Mode to Fault Codes
store the new setting and exit the PROGRAM mode. The drive is programmed to automatically restart after a fault and
6. To change another parameter, press the Mode button again to will attempt to restart three times after a fault (the drive will not re-
start after CF, cF, GF, F1, F2-F9, or Fo faults). If all three restart at-
re-enter the PROGRAM mode (the parameter menu will be tempts are unsuccessful, the drive will trip into FAULT LOCK-
accessed at the parameter that was last viewed or changed OUT (LC), which requires a manual reset.

76
Manual Reset NOTE: Handle boards by mounting standoffs only to avoid
If fault condition has been removed, cycle power to the chiller to electrostatic discharge.
reset the VFD. 4. Package the defective module in the carton of the new mod-
Troubleshooting ule for return to Carrier.
Troubleshooting the Motormaster® V control requires a combina- 5. Mount the new module in the unit’s control box using a Phil-
tion of observing system operation and VFD information. The lips screwdriver and the screws saved in Step 2. See Table 43
drive provides 2 kinds of troubleshooting modes: a status matrix for replacement module part numbers.
using the 3-digit display (P57, P58) and real time monitoring of 6. Reinstall all module connectors. For accessory Navigator™
key inputs and outputs. The collective group is displayed through
parameters 50 to 60 and all values are read-only. display replacement, make sure the plug is installed at TB3 in
the LEN connector.
• P50: FAULT HISTORY — Last 8 faults
7. Carefully check all wiring connections before restoring
• P51: SOFTWARE version
power.
• P52: DC BUS VOLTAGE — in percent of nominal. Usu-
ally rated input voltage x 1.4 8. Verify the Enable/Off/Remote Control switch is in the OFF
position.
• P53: MOTOR VOLTAGE — in percent of rated output
voltage 9. Restore control power. Verify that all module red LEDs blink
• P54: LOAD — in percent of drives rated output current in unison. Verify that all green LEDs are blinking and that the
rating scrolling marquee or Navigator display is communicating
• P55: VDC INPUT — in percent of maximum input: 100 correctly.
will indicate full scale which is 5 v 10. Verify all configuration information, settings, set points, and
• P56: 4-20 mA INPUT — in percent of maximum input. schedules. Return the Enable/Off/Remote Control switch to
20% = 4 mA, 100% = 20 mA its previous position.
Manual Starter Trip Table 43 — Replacement Modules
If the VFD manual starter (MS-FC-HS, MS-FC-A1 or MS-FC-B1
depending on model) trips, locate the inrush current protectors (3 REPLACEMENT REPLACEMENT
MODULE PART NO. (WITH PART NO. (WITHOUT
round black disks per motor) and verify their resistance. For units SOFTWARE) SOFTWARE)
operating at 208 v or 230 v, these devices should measure approx- MBB 30RA502134 HK50AA029
imately 7 ohms. For all other voltages, they should measure ap-
SCROLLING
proximately 20 ohms. Check value with mating plug disconnect- MARQUEE DISPLAY
HK50AA031 HK50AA030
ed, power to chiller off and at ambient temperature (not hot imme- EMM 30GT515218 HK50AA028
diately after stopping VFD). These are standard resistances at
NAVIGATOR
77°F (25°C). Resistance values decrease at higher temperatures DISPLAY
HK50AA033 N/A
and increase at lower temperatures. EXV 30GT515217 HK50AA026
REPLACING DEFECTIVE MODULES AUX 32GB500442E N/A
The ComfortLink replacement modules are shown in Table 43. If CXB 30GT515219 HK50AA027
the main base board (MBB) has been replaced, verify that all con- Hydronic Package
figuration data is correct. Follow the Configuration mode table
and verify that all items under sub-modes UNIT, OPT1 and OPT2 If the unit is equipped with a factory-installed hydronic package,
are correct. Any additional field-installed accessories or options consult the information below for proper maintenance and service.
(RSET, SLCT sub-modes) should also be verified as well as any In addition to this information, each factory-installed hydronic
specific time and maintenance schedules. package is supplied with a packet of information supplied by the
manufacturer, Bell & Gossett. Carrier strongly recommends that
Refer to the Start-Up Checklist for 30RAP Liquid Chiller (com- this information be thoroughly reviewed prior to operation of the
pleted at time of original start-up) found in the job folder. This in- chiller.
formation is needed later in this procedure. If the checklist does
not exist, fill out the current information in the Configuration PUMP PERFORMANCE CHECK
mode on a new checklist. Tailor the various options and configura- The factory-installed pumps in the 30RAP units are shipped with a
tions as needed for this particular installation. single impeller size available for that pump. The pump was select-
ed based on the flow and head requirements as provided to Carrier.
It is not uncommon for actual pump duty to be different than what
WARNING was anticipated at time of selection. In many cases, it may be de-
sirable to make some field modifications to obtain optimum pump
Electrical shock can cause personal injury and death. Shut off performance.
all power to this equipment during installation. There may be Before any pump modifications are made, it is recommended that
more than one disconnect switch. Tag all disconnect locations actual pump performance be verified and compared to the applica-
to alert others not to restore power until work is completed. ble pump curve. See base unit installation instructions. This can be
1. Check that all power to unit is off. Carefully disconnect all done in a variety of ways:
wires from the defective module by unplugging its con- 1. If pump impeller diameter is known:
nectors. a. Connect a differential pressure gage across the pump at
2. Remove the defective module by removing its mounting the ports provided on the pump volutes.
screws with a Phillips screwdriver, and removing the module b. Read GPM from applicable impeller curve.
from the control box. Save the screws for later use. 2. If pump impeller diameter is not known:
3. Verify that the instance jumper (MBB) or address switches If pump impeller diameter has been trimmed and the size is
(all other modules) exactly match the settings of the defective not known, it is necessary to determine which impeller curve
module. to read.

77
 The easiest way to confirm pump performance is to “dead- • Check chilled water flow switch operation.
head” the pump and read the differential pressure across the • Check all condenser fans for proper operation.
pressure ports on the pump. “Dead-heading” can be done by
shutting the circuit setter valve on the discharge side of the • Check compressor oil level.
pump. • Check crankcase heater operation if equipped.
NOTE: Although not all pumps can be safely “dead-headed,” EVERY 6 MONTHS:
centrifugal pumps (such as on the 30RAP units) can be
“dead-headed” for short amounts of time. It is recommended • Check chilled water flow switch sensor tip for buildup.
to keep the time short due to excessive heat build-up in the Clean if necessary. See page page 70.
pump. EVERY 12 MONTHS (FOR ALL MACHINES):
Since the “dead-head” condition is a no-flow condition, the • Check all electrical connections, tighten as necessary.
head will correspond to the intersection of an impeller curve
with the vertical axis of the pump chart. The correct impeller • Inspect all contactors and relays, replace as necessary.
diameter is that which corresponds to the measured head. • Check accuracy of thermistors, replace if greater than
3. Once the impeller diameter is known, proceed as in Step 1. ± 2°F (1.2°C) variance from calibrated thermometer.
• Check to be sure that the proper concentration of anti-
4. Water flow rate can be determined by using a differential freeze is present in the chilled water loop, if applicable.
pressure gage with the Bell & Gossett circuit setter balance
valve calculator or Armstrong Circuit Balancing Valve Slide • Verify that the chilled water loop is properly treated.
Rule. (This information is also provided in the installation • Check refrigerant filter driers for excessive pressure drop,
instructions.) This method will not directly measure pressure replace as necessary.
differential seen by the pump, but can be used to “double- • Check chilled water strainers, clean as necessary.
check” the pump measurement. • Check cooler heater operation, if equipped.
5. Verify that cable connections at the switch and at the terminal • Check condition of condenser fan blades and that they are
block are secure. securely fastened to the motor shaft.
6. For factory-installed hydronic system, verify that: • Perform Service Test to confirm operation of all
components.
a. All air has been purged from the system.
• Check for excessive cooler approach (Leaving Chilled Wa-
b. Circuit setter balance valve has been correctly set. ter Temperature — Saturated Suction Temperature) which
7. Pump impeller has been improperly trimmed and is not pro- may indicate fouling. Clean cooler vessel if necessary.
viding sufficient flow.
Condenser Coil Maintenance and Cleaning
8. Wrong pump motor rotation. Pump must rotate clockwise Recommendations
when viewed from motor end of pump.
Routine cleaning of coil surfaces is essential to maintain proper
PUMP MODIFICATIONS AND IMPELLER TRIMMING operation of the unit. See the following sections:
See applicable section in the Installation instructions. • MCHX condenser coils — See page 61.
• RTPF condenser coils — See page 62.
RESET OF CHILLER WATER FLOW
See applicable section in the Installation instructions. Control Box Maintenance
The control panel for 30RAP100-150 208/230 v and 380 v units
CHANGING OF PUMP SEALS
has two 24-v fans installed at the right side of the panel to modu-
See service instruction manual provided with hydronic package. late the inside temperature of the control box. These two fans are
controlled by a temperature switch. The temperature switch closes
VFD OPERATION
at 120°F and opens at 105°F. The inlet filter is located at the left
For units with factory-installed VFD (variable frequency drive) side of the control box. Inspect the inlet filter and fan outlet screen
option, see service instruction manual provided with the hydronic every three months, clean as needed.
package. Default password is 00002323.
TROUBLESHOOTING
MAINTENANCE
Complete Unit Stoppage and Restart
Recommended Maintenance Schedule Possible causes for unit stoppage and reset methods are shown be-
The following are only recommended guidelines. Jobsite condi- low and in Table 44. Refer to Fig. 3-19 for component arrange-
tions may dictate that maintenance schedule is performed more of- ment and control wiring diagrams.
ten than recommended.
GENERAL POWER FAILURE
ROUTINE: After power is restored, restart is automatic through normal MBB
• Periodic clean water rinse, especially in coastal and indus- start-up.
trial applications.
UNIT ENABLE-OFF-REMOTE CONTROL SWITCH IS OFF
• Check condenser coils for debris, clean as necessary.
When the switch is OFF, the unit will stop immediately. Place
EVERY MONTH: the switch in the ENABLE position for local switch control or in
• Check moisture indicating sight glass for possible refriger- the Remote Control position for control through Remote Control
ant loss and presence of moisture. closure.
EVERY 3 MONTHS (FOR ALL MACHINES): CHILLED FLUID PROOF-OF-FLOW SWITCH OPEN
• Check refrigerant charge. After the problem causing the loss of flow has been corrected, re-
set is manual by resetting the alarm with the scrolling marquee as
• Check all refrigerant joints and valves for refrigerant leaks, shown in Table 45.
repair as necessary.

78
OPEN 24-V CONTROL CIRCUIT BREAKER(S) restarts automatically, but must be reset manually by resetting the
Determine the cause of the failure and correct. Reset circuit break- alarm with the scrolling marquee as shown in Table 45.
er(s). Restart is automatic after MBB start-up cycle is complete.
COOLING LOAD SATISFIED
CAUTION
Unit shuts down when cooling load has been satisfied. Unit re- If unit stoppage occurs more than once as a result of any of the
starts when required to satisfy leaving fluid temperature set point. safety devices listed, determine and correct cause before
THERMISTOR FAILURE attempting another restart.
If a thermistor fails in either an open or shorted condition, the unit
will be shut down. Replace EWT, LWT, or OAT as required. Unit

Table 44 — Troubleshooting
SYMPTOMS CAUSE REMEDY
Cooler Circulating Pump Does Not Power line open Reset circuit breaker.
Run Control fuse or circuit breaker open Check control circuit for ground or short. Reset breaker and
replace fuse.
Tripped power breaker Check the controls. Find the cause of trip and reset breaker.
Loose terminal connection Check connections.
Improperly wired controls Check wiring and rewire if necessary.
Low line voltage Check line voltage — determine location of voltage drop and
remedy deficiency.
Pump motor defective Check motor winding for open or short. Replace compressor
if necessary.
Pump seized Replace pump.
Compressor Cycles Off on Loss of Low refrigerant charge Repair leak and recharge.
Charge
Compressor Cycles Off on Cooler Thermistor failure Replace thermistor.
Freeze Protection System load was reduced faster than controller could Unit will restart after fluid temperature rises back into the
remove stages control band. Avoid rapidly removing system load.
Compressor Shuts Down on High- High-pressure control acting erratically Replace control.
Pressure Control Noncondensables in system Evacuate and recharge.
Condenser dirty Clean condenser.
Fans not operating Repair or replace if defective.
System overcharged with refrigerant Reduce charge.
Unit Operates Too Long or Low refrigerant charge Add refrigerant.
Continuously Control contacts fused Replace control.
Partially plugged or plugged expansion valve or filter drier Clean or replace as needed.
Defective insulation Replace or repair as needed.
Damaged compressor Check compressor and replace if necessary.
Unusual or Loud System Noises Piping vibration Support piping as required.
Check for loose pipe connections or damaged compressor.
Compressor noisy Replace compressor (worn bearings).
Check for loose compressor holddown bolts.
Compressor Loses Oil Leak in system Repair leak.
Mechanical damage (Failed seals or broken scrolls) Replace compressor.
Oil trapped in line Check piping for oil traps.
Hot Liquid Line Shortage of refrigerant due to leak Repair leak and recharge.
Frosted Liquid Line Restricted filter drier Replace filter drier.
Frosted Suction Line Expansion valve admitting excess refrigerant (note: this is a Replace valve if defective.
normal condition for brine applications)
Stuck EXV (electronic expansion valve) Replace valve if defective.
Freeze-Up Improper charging Make sure a full quantity of fluid is flowing through the cooler
while charging, and suction pressure in cooler is equal to or
greater than pressure corresponding to 32°F (0°C).
System not drained for winter shutdown Recommended that system be filled with an appropriate gly-
col mixture to prevent freezing of pumps and fluid tubing.
Loose thermistor Verify thermistors are fully inserted in wells.

79
 Table 45 — Alarm and Alert Codes
ALARM/ ALARM
WHY WAS THIS ALARM ACTION TAKEN RESET PROBABLE
ALERT OR DESCRIPTION
GENERATED? BY CONTROL METHOD CAUSE
CODE ALERT
High-pressure switch open, solid-
state motor protection module,
Compressor feedback signal Compressor A1 Shut down internal overload open, faulty CSB,
P051 Pre-Alert Circuit A, Compressor 1 Failure Automatic
does not match relay state for 5 minutes loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
High-pressure switch open, solid-
state motor protection module,
P052 Pre-Alert Circuit A, Compressor 2 Failure Compressor feedback signal Compressor A2 Shut down Automatic internal overload open, faulty CSB,
does not match relay state for 5 minutes loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
High-pressure switch open, solid-
state motor protection module,
Compressor feedback signal Compressor A3 Shut down internal overload open, faulty CSB,
P053 Pre-Alert Circuit A, Compressor 3 Failure Automatic
does not match relay state for 5 minutes loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
High-pressure switch open, solid-
state motor protection module,
Compressor feedback signal Compressor B1 Shut down internal overload open, faulty CSB,
P055 Pre-Alert Circuit B, Compressor 1 Failure Automatic
does not match relay state for 5 minutes loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
High-pressure switch open, solid-
state motor protection module,
Compressor feedback signal Compressor B2 Shut down internal overload open, faulty CSB,
P056 Pre-Alert Circuit B, Compressor 2 Failure Automatic
does not match relay state for 5 minutes loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
High-pressure switch open, solid-
state motor protection module,
P057 Pre-Alert Circuit B, Compressor 3 Failure Compressor feedback signal Compressor B3 Shut down Automatic internal overload open, faulty CSB,
does not match relay state for 5 minutes loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
High-pressure switch open, solid-
state motor protection module,
3 consecutive P051 Pre-Alerts
Compressor A1 shut internal overload open, faulty CSB,
T051 Alert Circuit A, Compressor 1Failure without compressor feedback Manual
down. loss of condenser air, filter drier
signal matching relay state.
plugged, non-condensables,
operation beyond capability.
Circuit A, Compressor 1 Stuck On CSB reads ON while the Welded compressor contactor,
Alarm compressor relay has been Compressor A1 shut down Manual welded relay output on MBB or CXB,
Failure
commanded OFF failed CSB or wiring error.
A051
CSB reads current/no current/ Refrigerant charge, wiring error,
Alarm Circuit A, Compressor 1 Chattering current/no current cycling in any Compressor A1 shut down Manual plugged condenser coil, condenser
Contactor 16 second window. fan motor failure.
High-pressure switch open, solid-
state motor protection module,
3 consecutive P052 Pre-Alerts
T052 Alert Circuit A, Compressor 2Failure without compressor feedback Compressor A2 shut Manual internal overload open, faulty CSB,
signal matching relay state. down. loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
CSB reads ON while the Welded compressor contactor,
Alarm Circuit A, Compressor 2 Stuck On compressor relay has been Compressor A2 shut down Manual welded relay output on MBB or CXB,
Failure commanded OFF failed CSB or wiring error.
A052
CSB reads current/no current/ Refrigerant charge, wiring error,
Circuit A, Compressor 2 Chattering
Alarm current/no current cycling in any Compressor A2 shut down Manual plugged condenser coil, condenser
Contactor
16 second window. fan motor failure.
High-pressure switch open, solid-
state motor protection module,
3 consecutive P053 Pre-Alerts
Compressor A3 shut internal overload open, faulty CSB,
T053 Alert Circuit A, Compressor 3Failure without compressor feedback Manual
down. loss of condenser air, filter drier
signal matching relay state.
plugged, non-condensables,
operation beyond capability.
CSB reads ON while the Welded compressor contactor,
Circuit A, Compressor 3 Stuck On
Alarm Failure compressor relay has been Compressor A3 shut down Manual welded relay output on MBB or CXB,
commanded OFF failed CSB or wiring error.
A053
Circuit A, Compressor 3 Chattering CSB reads current/no current/ Refrigerant charge, wiring error,
Alarm current/no current cycling in any Compressor A3 shut down Manual plugged condenser coil, condenser
Contactor
16 second window. fan motor failure.
High-pressure switch open, solid-
state motor protection module,
3 consecutive P055 Pre-Alerts
Compressor B1 shut internal overload open, faulty CSB,
T055 Alert Circuit B, Compressor 1 Failure without compressor feedback Manual
signal matching relay state. down. loss of condenser air, filter drier
plugged, non-condensables,
operation beyond capability.
CSB reads ON while the Welded compressor contactor,
Circuit B, Compressor 1 Stuck On
Alarm compressor relay has been Compressor B1 shut down Manual welded relay output on MBB or CXB,
Failure commanded OFF failed CSB or wiring error.
A055
Circuit B, Compressor 1 Chattering CSB reads current/no current/
Refrigerant charge, wiring error,
Alarm current/no current cycling in any Compressor B1 shut down Manual plugged condenser coil, condenser
Contactor
16 second window. fan motor failure.

80
 Table 45 — Alarm and Alert Codes (cont)
ALARM/ ALARM
WHY WAS THIS ALARM ACTION TAKEN RESET PROBABLE
ALERT OR DESCRIPTION
GENERATED? BY CONTROL METHOD CAUSE
CODE ALERT
High-pressure switch open, solid-
state motor protection module,
3 consecutive P056 Pre-Alerts
Compressor B2 shut internal overload open, faulty CSB,
T056 Alert Circuit B, Compressor 2 Failure without compressor feedback Manual
down. loss of condenser air, filter drier
signal matching relay state.
plugged, non-condensables,
operation beyond capability.
Circuit B, Compressor 2 Stuck On CSB reads ON while the Welded compressor contactor,
Alarm compressor relay has been Compressor B2 shut down Manual welded relay output on MBB or CXB,
Failure
commanded OFF failed CSB or wiring error.
A056
CSB reads current/no current/ Refrigerant charge, wiring error,
Circuit B, Compressor 2 Chattering
Alarm current/no current cycling in any Compressor B2 shut down Manual plugged condenser coil, condenser
Contactor
16 second window. fan motor failure.
High-pressure switch open, solid-
state motor protection module,
3 consecutive P057 Pre-Alerts
Compressor B3 shut internal overload open, faulty CSB,
T057 Alert Circuit B, Compressor 3 Failure without compressor feedback down. Manual loss of condenser air, filter drier
signal matching relay state.
plugged, non-condensables,
operation beyond capability.
CSB reads ON while the Welded compressor contactor,
Circuit B, Compressor 3 Stuck On
Alarm compressor relay has been Compressor B3 shut down Manual welded relay output on MBB or CXB,
Failure
commanded OFF failed CSB or wiring error.
A057
CSB reads current/no current/ Refrigerant charge, wiring error,
Circuit B, Compressor 3 Chattering
Alarm Contactor current/no current cycling in any Compressor B3 shut down Manual plugged condenser coil, condenser
16 second window. fan motor failure.
A060 Alarm Cooler Leaving Fluid Thermistor Thermistor outside range of –40 Chiller shut down Automatic Thermistor failure, damaged cable/
Failure to 245°F (–40 to 118°C) immediately wire or wiring error.
Cooler Entering Fluid Thermistor Thermistor outside range of –40 Chiller shut down Thermistor failure, damaged cable/
A061 Alarm Automatic
Failure to 245°F (–40 to 118°C) immediately wire or wiring error.
Circuit A Return Gas Thermistor Return gas thermistor is outside Thermistor failure, damaged cable/
T068 Alert Failure range of –40 to 245°F (–40 to Circuit A shut down Automatic
wire or wiring error.
118°C)
Circuit B Return Gas Thermistor Return gas thermistor is outside
T069 Alert Failure range of –40 to 245°F (–40 to Circuit B shut down Automatic Thermistor failure, damaged cable/
118°C) wire or wiring error.
Temperature reset
disabled. Chiller runs
Thermistor outside range of –40 under normal control/set Thermistor failure, damaged cable/
T073 Alert Outside Air Thermistor Failure Automatic
to 245°F (–40 to 118°C) points. When capacity wire or wiring error.
reaches 0, cooler/pump
heaters are energized.
Temperature reset
Space Temperature/Dual Chiller Thermistor outside range of –40 disabled. Chiller runs Thermistor failure, damaged cable/
T074 Alert Automatic
Thermistor Failure to 245°F (–40 to 118°C) under normal control/set wire or wiring error.
points.
Circuit A Saturated Suction Saturated suction temperature is Faulty expansion valve or suction
T077 Alert Temperature exceeds Cooler greater than leaving fluid Circuit A shutdown Manual pressure transducer or leaving fluid
Leaving Fluid Temperature temperature for 5 minutes. thermistor.
Circuit B Saturated Suction Saturated suction temperature is Faulty expansion valve or suction
T078 Alert Temperature exceeds Cooler greater than leaving fluid Circuit B shutdown Manual pressure transducer or leaving fluid
Leaving Fluid Temperature temperature for 5 minutes. thermistor.
Thermistor outside range of –40 Chiller runs as a stand Dual LWT thermistor failure,
T079 Alert Lead/Lag LWT Thermistor Failure to 245°F (–40 to 118°C) alone machine Automatic damaged cable/wire or wiring error.
Circuit A Discharge Pressure Transducer failure, poor connection
T090 Alert Outside of range (0 to 667 psig) Circuit A shut down Automatic
Transducer Failure to MBB, or wiring damage/error.
Circuit B Discharge Pressure Transducer failure, poor connection
T091 Alert Outside of range (0 to 667 psig) Circuit B shut down Automatic
Transducer Failure to MBB, or wiring damage/error.
Circuit A Suction Pressure Transducer failure, poor connection
T092 Alert Outside of range (0 to 420 psig) Circuit A shut down Automatic
Transducer Failure to MBB, or wiring damage/error.
Circuit B Suction Pressure Transducer failure, poor connection
T093 Alert Outside of range (0 to 420 psig) Circuit B shut down Automatic
Transducer Failure to MBB, or wiring damage/error.
Size 010,015 chiller shut
Discharge thermistor (DTT) is Thermistor failure, damaged cable/
T094 Alert Discharge Gas Thermistor Failure either open or shorted down. Digital compressor Automatic
wire or wiring error.
shut down.
If the compressors are off and
T110 Alert Circuit A Loss of Charge discharge pressure reading is < Circuit not allowed to start. Manual Refrigerant leak or transducer failure
26 psig for 30 sec.
If the compressors are off and
T111 Alert Circuit B Loss of Charge discharge pressure reading is < Circuit not allowed to start. Manual Refrigerant leak or transducer failure
26 psig for 30 sec.
Circuit saturated suction Faulty Expansion valve, faulty
Circuit A High Saturated Suction
T112 Alert temperature pressure transducer Circuit shut down Manual suction pressure transducer or high
Temperature
> 70°F (21.1°C) for 5 minutes entering fluid temperature.
Circuit B High Saturated Suction Circuit saturated suction Faulty Expansion valve, faulty
T113 Alert Temperature temperature pressure transducer Circuit shut down Manual suction pressure transducer or high
> 70°F (21.1°C) for 5 minutes entering fluid temperature.
Automatic restart
after first daily Faulty expansion valve, faulty suction
Suction superheat is less than
T114 Alert Circuit A Low Suction Superheat Circuit A shut down. occurrence. pressure transducer, faulty suction
3°F (1.7°C) for 5 minutes.
Manual restart gas thermistor, circuit overcharged
thereafter.
Automatic restart
after first daily Faulty expansion valve, faulty suction
Suction superheat is less than
T115 Alert Circuit B Low Suction Superheat Circuit B shut down. occurrence. pressure transducer, faulty suction
3°F (1.7°C) for 5 minutes.
Manual restart gas thermistor, circuit overcharged
thereafter.

81
 Table 45 — Alarm and Alert Codes (cont)
ALARM/ ALARM
WHY WAS THIS ALARM ACTION TAKEN RESET PROBABLE
ALERT OR DESCRIPTION
GENERATED? BY CONTROL METHOD CAUSE
CODE ALERT
Mode 7 caused the compressor Faulty expansion valve, low
to unload 3 consecutive times refrigerant charge, plugged filter
Circuit A Low Cooler Suction
T116 Alert with less than a 30-minute Circuit shut down Manual drier, faulty suction pressure
Temperature
interval between each circuit transducer, low cooler fluid flow,
shutdown. improper brine freeze set point
Mode 8 caused the compressor Faulty expansion valve, low
to unload 3 consecutive times refrigerant charge, plugged filter
T117 Alert Circuit B Low Cooler Suction with less than a 30-minute Circuit shut down Manual drier, faulty suction pressure
Temperature
interval between each circuit transducer, low cooler fluid flow,
shutdown. improper brine freeze set point
Discharge Thermistor (DTT) Refrigerant charge, plugged filter
P118 Pre-Alert High Discharge Gas Temperature Compressor A1 shut down Automatic
reading is greater than 250°F drier, head pressure control.
T118/ 3 Discharge Gas Temperature Refrigerant charge, plugged filter
Alert High Discharge Gas Temperature Compressor A1 shut down Manual
A118 alerts occur within a day drier, head pressure control.
Automatic, only
after first 3 daily
occurrences. Faulty transducer, low/restricted
Manual reset condenser airflow, incorrect
Compressor operation outside of
T126 Alert Circuit A High Head Pressure Circuit shut down thereafter. refrigerant charge, non-
operating envelope.
Reading from condensables, faulty condenser fan
OAT sensor must motor, faulty EXV.
drop 5°F (2.8°C)
before restart
Automatic, only
after first 3 daily
occurrences. Faulty transducer/restricted
Compressor operation outside of Circuit shut down Manual reset condenser airflow, incorrect
T127 Alert Circuit B High Head Pressure thereafter. refrigerant charge, non-
operating envelope.
Reading from condensables, faulty condenser fan
OAT sensor must motor, faulty EXV.
drop 5°F (2.8°C)
before restart
Automatic restart
after first daily
Circuit A Low Suction Suction pressure below 34 psig Faulty or sticking EXV, low refrigerant
T133 Alert Circuit shut down occurrence.
Pressure for 8 seconds or below 23 psig charge, plugged filter drier.
Manual restart
thereafter.
Automatic restart
after first daily
T134 Alert Circuit B Low Suction Suction pressure below 34 psig Circuit shut down occurrence. Faulty or sticking EXV, low refrigerant
Pressure for 8 seconds or below 23 psig Manual restart charge, plugged filter drier.
thereafter.
Suction pressure failed to drop Verify correct compressor rotation.
A140 Alarm Reverse Rotation Detected Chiller not allowed to start. Manual
when compressor is energized Check for correct fan rotation first.
Automatic once
CCN emergency stop command CCN command
A150 Alarm Unit is in Emergency Stop Chiller shutdown CCN Network command.
received for EMSTOP
returns to normal
Manual once
A151 Alarm Illegal Configuration One or more illegal Chiller is not allowed to configuration Configuration error. Check unit
configurations exists. start. errors are settings.
corrected
Automatic once
alarms/alerts are
Both circuits are down due to cleared that Alarm notifies user that chiller is
A152 Alarm Unit Down Due to Failure Chiller is unable to run.
alarms/alerts. prevent the 100% down.
chiller from
starting.
Occupancy schedule will Automatic when
T153 Alert Real Time Clock Hardware Failure Internal clock on MBB fails not be used. Chiller correct clock Time/Date/Month/ Day/Year not
properly set.
defaults to Local On mode. control restarts.
A154 Alarm Serial EEPROM Hardware Failure Hardware failure with MBB Chiller is unable to run. Manual Main Base Board failure.
Potential failure of MBB. Download
Configuration/storage failure with
T155 Alert Serial EEPROM Storage Failure No Action Manual current operating software. Replace
MBB
MBB if error occurs again.
Critical Serial EEPROM Storage Configuration/storage failure with Chiller is not allowed to
A156 Alarm Manual Main Base Board failure.
Failure MBB run.
Hardware failure with peripheral Chiller is not allowed to
A157 Alarm A/D Hardware Failure Manual Main Base Board failure.
device run.
T170 Alert Loss of communication with the MBB cannot communicate with Compressor A1 shut down Automatic Wiring error, faulty wiring or failed
Compressor Expansion Module CXB CXB. Incorrect configuration.
Loss of Communication with EXV MBB loses communication with Chiller is not allowed to Wiring error, faulty wiring or failed
A172 Alarm Automatic
board EXV board run. EXV board.
4 to 20 mA temperature
MBB loses communication with reset disabled. Demand Wiring error, faulty wiring or failed
T173 Alert Loss of Communication with EMM Automatic
EMM Limit set to 100%. 4 to 20 Energy Management Module (EMM).
mA set point disabled.
4 to 20 mA Cooling Set Point Input Configured with EMM; input less Set point function disabled. Faulty signal generator, wiring error,
T174 Alert Automatic
Failure than 2 mA or greater than 22 mA Chiller controls to CSP1. or faulty EMM.
Loss of Communication with the MBB loses communication with Chiller is not allowed to Wiring error, faulty wiring or failed
T175 Alert Automatic
AUX Board AUX Board. run. AUX board, incorrect configuration.
Reset function disabled.
4 to 20 mA Temperature Reset Configured with EMM; input less Faulty signal generator, wiring error,
T176 Alert Chiller returns to normal Automatic
Input Failure than 2 mA or greater than 22 mA or faulty EMM.
set point control.

82
 Table 45 — Alarm and Alert Codes (cont)
ALARM/ ALARM
WHY WAS THIS ALARM ACTION TAKEN RESET PROBABLE
ALERT OR DESCRIPTION
GENERATED? BY CONTROL METHOD CAUSE
CODE ALERT
Demand limit function
4 to 20 mA Demand Limit Input Configured with EMM; input less disabled. Chiller returns to Faulty signal generator, wiring error,
T177 Alert Automatic
Failure than 2 mA or greater than 22 mA 100% demand limit or faulty EMM.
control.
Wrong VFD address, damaged
The MBB lost communication
A179 Alarm Fan VFD Communication Failure Chiller shut down. Automatic communication cable, wiring error, no
with the Danfoss VFD1 module.
power to VFD, unresponsive VFD.
Pump 1 Auxiliary Contacts are
Cooler Pump Auxiliary Contact closed when Pump 2 output is Both pump outputs are Wiring error, faulty pump contactor
A189 Alarm energized or if Pump 2 Auxiliary Automatic
Inputs Miswired turned off. auxiliary contacts.
Contacts are closed when Pump
1 output is energized.
Pump 1 Auxiliary Contacts did Pump 1 turned off. Pump 2
Cooler Pump 1 Aux Contacts Wiring error, faulty contacts on pump
T190 Alert not close within 26 seconds after will be started if available. Manual
Failed to Close at Start-Up contactor
pump was started
Pump 2 Auxiliary Contacts did Pump 2 turned off. Pump 1
Cooler Pump 2 Aux Contacts Wiring error, faulty contacts on pump
T191 Alert not close within 26 seconds after will be started if available. Manual
Failed to Close at Start-Up contactor
pump was started
Pump 1 did not provide flow to
Cooler Pump 1 Failed to Provide Pump 1 turned off. Pump 2 Wiring error, pump circuit breaker
T192 Alert Flow at Start-Up close flow switch within 60 will be started if available. Manual tripped, contactor failure
seconds
Pump 2 did not provide flow to
Cooler Pump 2 Failed to Provide Pump 1 turned off. Pump 2 Wiring error, pump circuit breaker
T193 Alert close flow switch within 60 Manual
Flow at Start-Up will be started if available. tripped, contactor failure
seconds
Pump 1 Auxiliary Contacts open Pump 2 will be started if
Cooler Pump 1 Aux Contacts for 26 seconds after initially available. Chiller allowed Wiring error, faulty contacts on pump
T194 Alert Manual
Opened During Normal Operation made. All compressors shut to run if Pump 2 contactor
down. Pump 1 turned off. successfully starts.
Pump 2 Auxiliary Contacts open Pump 1 will be started if
Cooler Pump 2 Aux Contacts for 26 seconds after initially available. Chiller allowed Wiring error, faulty contacts on pump
T195 Alert Manual
Opened During Normal Operation made. All compressors shut to run if Pump 1 contactor
down. Pump 2 turned off. successfully starts.
All compressors shut
down. Pump 1 turned off.
Cooler flow switch contacts open Pump 2 will be started if Wiring error, pump circuit breaker
T196 Alert Flow Lost While Pump 1 Running for 3 seconds after initially made available. Chiller allowed Manual
tripped, contactor failure
to run if Pump 2
successfully starts and
flow switch is closed.
All compressors shut
down. Pump 2 turned off.
Pump 1 will be started if
T197 Alert Flow Lost While Pump 2 Running Cooler flow switch contacts open available. Chiller allowed Manual Wiring error, pump circuit breaker
for 3 seconds after initially made to run if Pump 1 tripped, contactor failure
successfully starts and
flow switch is closed.
Cooler Pump 1 Aux Contacts Pump 1 Auxiliary Contacts Manual when Wiring error, faulty pump contactor
A198 Alarm closed for 2 minutes when pump Chiller not allowed to start aux contacts (welded contacts), pump in hand
Closed While Pump Off state is off open position
Cooler Pump 2 Aux Contacts Pump 2 Auxiliary Contacts Manual when Wiring error, faulty pump contactor
A199 Alert Closed While Pump Off closed for 2 minutes when pump Chiller not allowed to start aux contacts (welded contacts), pump in hand
state is off open position
Cooler flow switch contacts failed
to close within 1 minute (if cooler Chiller not allowed to start.
Wiring error, pump circuit breaker
P200 / Pre-Alert/ Cooler Flow/Interlock Contacts pump control is enabled) or For models with dual
Manual tripped, contactor failure, faulty flow
A200 Alarm Failed to Close at Start-Up within 5 minutes (if cooler pump pumps, the second pump
switch or interlock
control is not enabled) after start- will be started if available
up
All compressors shut
Flow switch opens for at least 3 down. For models with
P201 / Pre-Alert/ Cooler Flow/Interlock Contacts Automatic (P201) Cooler pump failure, faulty flow
seconds after being initially dual pumps, the second
or Manual (A201) switch
or interlock, pump circuit
A201 Alarm Opened During Normal Operation
closed pump will be started if breaker tripped
available
If configured for cooler pump
Automatic when Wiring error, faulty pump contactor
Cooler Pump Interlock Closed control and flow switch input is
A202 Alarm When Pump is Off closed for 5 minutes while pump Chiller not allowed to start aux contacts (welded contacts)
open
output(s) are off
Wiring error, faulty wiring, failed
Loss of Communication with Slave Master
chiller MBB loses Dual chiller control
T203 Alert communication with slave chiller disabled. Chiller runs as a Automatic Slave chiller MBB module, power
Chiller loss at slave chiller, wrong slave
MBB stand-alone machine.
address.
Slave chiller MBB loses Dual chiller control Wiring error, faulty wiring, failed
Loss of Communication with
T204 Alert communication with master disabled. Chiller runs as a Automatic master chiller MBB module, power
Master Chiller
chiller MBB stand-alone machine loss at Master chiller.
CCN Address for both chillers is the
Dual chiller routine
Master and Slave Chiller with Master and slave chiller have the disabled. Master/slave run same. Must be different. Check
T205 Alert Automatic
Same Address same CCN address (CCN.A) CCN.A under the OPT2 sub-mode in
as stand-alone chillers. Configuration at both chillers.
High Leaving Chilled Water LWT is greater than control point Building load greater than unit
T206 Alert and LCW Alert Limit, and Alert only. No action taken. Automatic capacity, or compressor fault. Check
Temperature
capacity is at 100% for 1 minute. for other alarms/alerts.

83
 Table 45 — Alarm and Alert Codes (cont)
ALARM/ ALARM
WHY WAS THIS ALARM ACTION TAKEN RESET PROBABLE
ALERT OR DESCRIPTION
GENERATED? BY CONTROL METHOD CAUSE
CODE ALERT
Both EWT and
LWT must be at
least 6°F (3.3°C)
Chiller shutdown. Cooler above Brine
Cooler EWT or LWT is less than pump continues to run a Faulty thermistor, low water flow,
A207 Alarm Cooler Freeze Protection Freeze point
Brine Freeze (BR.FZ) minimum of 5 minutes (if faulty cooler water.
(BR.FZ).
control enabled). Automatic for
first, Manual
reset thereafter.
Reverse water flow, improperly
Cooler EWT is less than LWT by Chiller shutdown. Cooler installed EWT/LWT thermistor
A208 Alarm EWT or LWT Thermistor failure 3°F (1.7°C) for 1 minute after a pump shut off (if control Manual (location, thermistor not fully seated
circuit is started enabled). in the thermistor well or wiring),
inaccurate thermistor.
Pump 1 Service Countdown
(P.1.DN) expired. Complete
Cooler Pump 1 Scheduled
T300 Alert pump 1 maintenance and enter None Automatic Routine pump maintenance required
Maintenance Due
YES for Pump 1 Maintenance
Done (P.1.MN) item.
Pump 2 Service Countdown
Cooler Pump 2 Scheduled (P.2.DN) expired. Complete
T301 Alert pump 2 maintenance and enter None Automatic Routine pump maintenance required
Maintenance Due
YES for Pump 1 Maintenance
Done (P.2.MN) item.
Strainer Service Countdown
(S.T.DN) expired. Complete
Strainer Blowdown Scheduled Routine strainer maintenance
T302 Alert strainer blowdown and enter None Automatic
Maintenance Due required
YES for Strainer Maintenance
Done (S.T.MN) item.
Coil Service Countdown
(C.L.DN) expired. Complete
Routine condenser coil maintenance
T303 Alert Condenser Coil Maintenance Due condenser coil cleaning and None Automatic required
enter YES for Coil Maintenance
Done (C.L.MN) item.
A412 Alarm Variable Speed Fan Motor/Drive See Table 46 and Table 47. Chiller shut down Automatic See Table 46 and Table 47.
Failure Alarm
Variable Speed Fan Motor/Drive
T413 Alert Failure Alert See Table 46 and Table 47. None Automatic See Table 46 and Table 47.
Alert occurs when CSB output is CSB failure.
T501 Alert Current Sensor Board A1 Failure a constant high value Compressor A1 shut down Automatic Wiring error.
Alert occurs when CSB output is CSB failure.
T502 Alert Current Sensor Board A2 Failure Compressor A2 shut down Automatic
a constant high value Wiring error.
Alert occurs when CSB output is CSB failure.
T503 Alert Current Sensor Board A3 Failure Compressor A3 shut down Automatic
a constant high value Wiring error.
Current Sensor Board B1 Failure Alert
occurs when CSB output is CSB failure.
T505 Alert Compressor B1 shut down Automatic
a constant high value Wiring error.
Current Sensor Board B2 Failure Alert occurs when CSB output is
CSB failure.
T506 Alert Compressor B2 shut down Automatic
a constant high value Wiring error.
Alert occurs when CSB output is CSB failure.
T507 Alert Current Sensor Board B3 Failure a constant high value Compressor B3 shut down Automatic Wiring error.
T950 Alert Loss of Communication with Water No communications have been WSM forces removed. Automatic Failed module, wiring error, failed
System Manager received by the MBB within 5 Chiller runs under own transformer, loose connection plug,
minutes of last transmission control wrong address
A951 Alert Loss of Communication with No communications have been CSM forces removed. Automatic Failed module, wiring error, failed
Chillervisor System Manager received by the MBB within 5 Chiller runs under own transformer, loose connection plug,
minutes of last transmission control wrong address

LEGEND
CCN — Carrier Comfort Network
CSB — Current Sensor Board
CSM — Chillervisor System Manager
CXB — Current Sensor Board
EEPROM — Electronic Erasable Programmable Read Only Memory
EMM — Energy Management Module
EWT — Entering Fluid Temperature
EXV — Electronic Expansion Valve
HSM — Hydronic System Manager
LCW — Leaving Chilled Water
LWT — Leaving Fluid Temperature
MBB — Main Base Board
OAT — Outdoor-Air Temperature
SCT — Saturated Condensing Temperature
WSM — Water System Manager

84
 Table 46 — HEVCF Common Alarms
ALARM DESCRIPTION PROBABLE CAUSE
A179 Loss of communication with Danfoss VFD module Wrong VFD address, damaged communication cable, wiring error, no power to VFD, unresponsive VFD.
Phase is missing or imbalance is too high on supply side. Check incoming wiring, drive fuses, and incoming
A412 Mains phase loss(A4)a
power to unit. This is also used for a fault in the input rectifier on the frequency converter.
Frequency converter has cut out due to excessive current and temperature over a certain time period. Check
A412 Inverter Overload(A9)a
motors for locked rotor or shorts.
A412 Torque Limit(A12)a Motor torque limit has been exceeded. Check motor for locked rotor or fan restrictions.
A412 Over Current(A13)a Inverter peak current limit is exceeded. Check motor for locked rotor or fan restrictions.
Current exists between output phases and ground. Check motors for short to ground. Check wiring connections
A412 Earth (ground) Fault(A14)a
at fan motor terminal block at drive.
A412 Short Circuit(A16)a There is a short circuit in the motor wiring. Find the short circuit and repair.
A412 Control Word Timeout(A17)a Drive is not communicating with chiller. Check LEN bus wiring connections. Check address is set properly.
A412 Heatsink Temp(A29)a Heatsink exceeded max temperature. Check drive fan operation and air-flow to heatsink fins.
A412 Motor Phase U Missing(A30)a Check load side wiring to motor for missing phase.
A412 Motor Phase V Missing(A31)a Check load side wiring to motor for missing phase.
A412 Motor Phase W Missing(A32)a Check load side wiring to motor for missing phase.
A412 Fieldbus Communication Fault(A34)a Fieldbus on communication card in drive is not working.
NOTE(S):
a. Danfoss Drive Alarm Code.

85
 Table 47 — HEVCF Alarm/Alert Details, Danfoss Drive
ALARM/WARNING NO. ALARM DESCRIPTION WARNING ALARM/TRIP ALARM/TRIP LOCK PARAMETER
1 T413 10V Low X
2 T413,A412 Live Zero Error (X) (X) 6-01
3 T413 No Motor (X) 1-80
4 T413,A412 Mains phase Loss (X) (X) (X) 14-12
5 T413 DC Voltage High X
6 T413 DC Voltage Low X
7 T413,A412 DC over Volt X X
8 T413,A412 DC under Volt X X
9 T413,A412 Inverter Overld X X
10 T413,A412 Motor ETR Over (X) (X) 1-90
11 T413,A412 Motor Thermistor Over (X) (X) 1-90
12 T413,A412 Torque Limit X X
13 T413,A412 Over Current X X X
14 T413,A412 Earth Fault X X X
16 A412 Short Circuit X X
17 T413,A412 Ctrl Word TO (X) (X) 8-04
23 T413,A412 Fans Warn X X
25 T413,A412 Brake Resistor X X
26 T413,A412 Brake Overload (X) (X) 2-13
28 T413,A412 Brake Check (X) (X) 2-15
29 A412 Pwr Card Temp X X
30 A412 U phase Loss (X) (X) 4-58
31 A412 V phase Loss (X) (X) 4-58
32 A412 W phase Loss (X) (X) 4-58
33 A412 Inrush Fault X X
34 T413,A412 Fieldbus Fault X X
36 T413,A412 Mains Failure X X
38 A412 Internal Fault X X
47 T413,A412 24V Supply Low X X X
48 A412 1.8V Supply Low X X
49 T413 Speed Limit (X) 1-86
57 A412 AMA Not OK X
59 T413 Current Limit X
61 T413 Encoder Loss X
62 T413 Output freq limit X
64 T413 Voltage Limit X
65 T413,A412 Ctrl Card Temp X X X
66 T413 Low Temp X
67 A412 Option Change X
68 A412 Safe Stop X
71 T413,A412 PTC1 Safe Stop X X
72 T413,A412 Dangerous Failure X X X
80 A412 Drive Initialized X
94 T413,A412 End of curve (X) (X) 22-50
95 T413,A412 Broken Belt (X) (X) 22-60
96 T413 Start delayed (X) 22-76
97 T413 Stop delayed (X) 22-76
98 T413 Clock Failure (X) 0-70
203 T413 Missing Motor X
204 T413 Locked Rotor X
243 T413,A412 Brake IGBT X X
247 T413 Pwr Card Temp X
251 A412 Service Trip X
NOTE: (X) = Dependent on parameter.

86
LOW SATURATED SUCTION ASTP Protection Trip
Several conditions can lead to low saturated suction alarms and All non-digital Copeland compressors are equipped with an ad-
the chiller controls have several override modes built in which will vanced scroll temperature protection (ASTP). A label located
attempt to keep the chiller from shutting down. Low fluid flow, above the terminal box identifies models that contain this technol-
low refrigerant charge and plugged filter driers are the main caus- ogy. See Fig. 61.
es for this condition. To avoid permanent damage and potential
freezing of the system, do NOT repeatedly reset these alert and/or
alarm conditions without identifying and correcting the cause(s).
COMPRESSOR SAFETIES
The 30RAP units with ComfortLink controls include a compres-
sor protection board that protects the operation of each of the com-
pressors. Each board senses the presence or absence of current to
each compressor.
If there is a command for a compressor to run and there is no cur-
rent, then one of the following safeties or conditions have turned
the compressor off:
Compressor Overcurrent
All compressors have internal line breaks or a motor protection Fig. 61 — Advanced Scroll Temperature
device located in the compressor electrical box. Protection Label (010-090)
Compressor Short Circuit Advanced scroll temperature protection is a form of internal dis-
There will not be current if the circuit breaker that provides short charge temperature protection that unloads the scroll compressor
circuit protection has tripped. when the internal temperature reaches approximately 300°F. At
this temperature, an internal bi-metal disk valve opens and causes
Compressor Motor Over Temperature the scroll elements to separate, which stops compression. Suction
The internal line-break or over temperature switch has opened. and discharge pressures balance while the motor continues to run.
High-Pressure Switch Trip The longer the compressor runs unloaded, the longer it must cool
before the bi-metal disk resets. See Fig. 62 for approximate reset
The high-pressure switch has opened. Below are the factory set- times.
tings for the fixed high-pressure switch.
To manually reset ASTP, the compressor should be stopped and
30RAP UNIT CUTOUT CUT-IN allowed to cool. If compressor is not stopped, the motor will run
SIZE psig kPa psig kPa until the motor protector trips, which occurs up to 90 minutes later.
010-150 650 4482 500 3447 Advanced scroll temperature protection will reset automatically
before the motor protector resets, which may take up to 2 hours.

120
Recommended Cooling Time

110
100
90
80
70
(Minutes)

60
50
40
30
20
10
0
0 10 20 30 40 50 60 70 80 90
Compressor Unloaded Run Time (Minutes)

NOTE: Times are approximate. Various factors, including high humidity, high ambient temperature,
and the presence of a sound blanket will increase cool-down times.
Fig. 62 — Recommended Minimum Cool-Down Time after Compressor Is Stopped

87
Motor Overload Protection
COPELAND COMPRESSORS MODELS WITH ELECTRI- WARNING
CAL CODE TF (010-090)
Models with a “TF” in the electrical code (i.e., ZP120KCE-TFD) Do not supply power to unit with compressor cover removed.
have an internal line break motor overload located in the center of Failure to follow this warning can cause a fire, resulting in per-
the Y of the motor windings. This overload disconnects all three sonal injury or death.
legs of the motor from power in case of an over-current or over-
temperature condition. The overload reacts to a combination of WARNING
motor current and motor winding temperature. The internal over-
load protects against single phasing. Time must be allowed for the
motor to cool down before the overload will reset. If current mon- Exercise extreme caution when reading compressor currents
itoring to the compressor is available, the system controller can when high-voltage power is on. Correct any of the problems
take advantage of the compressor internal overload operation. The described below before installing and running a replacement
controller can lock out the compressor if current draw is not coin- compressor. Wear safety glasses and gloves when handling
cident with contactor energizing, implying that the compressor has refrigerants. Failure to follow this warning can cause fire,
shut off on its internal overload. This will prevent unnecessary resulting in personal injury or death.
compressor cycling on a fault condition until corrective action can
be taken. CAUTION
COPELAND COMPRESSORS MODELS WITH ELECTRI-
CAL CODE “TW” OR “TE” (010-090) OR DANFOSS COM- Do not manually operate contactors. Serious damage to the
PRESSOR (100-150) machine may result.

CAUTION

The electronic motor protection module is a safety device that

must not be bypassed or compressor damage may result.

Copeland models with “TW” or “TE” in the electrical code (i.e.,

ZP182KCE-TWD or ZP182KCE-TED) or Danfoss compressor
have a motor overload system that consists of an external electron-
ic control module connected to a chain of four thermistors embed-
ded in the motor windings. The module will trip and remain off for
a minimum of 30 minutes if the motor temperature exceeds a pre-
set point to allow the scrolls to cool down after the motor tempera-
ture limit has been reached. It may take as long as two hours for 1 2 3
the motor to cool down before the overload will reset. LEGEND
NOTE: Turning off power to the module resets it immediately. 1 — Kriwan Motor Protection Module Power
2 — Kriwan Control Circuit Connections
3 — Motor Thermal Sensor
CAUTION Fig. 63 — Kriwan Motor Protection Module
Restarting the compressor sooner may cause a destructive 1. De-energize control circuit and module power. Remove the
temperature buildup in the scrolls. control circuit wires from the module (terminals M1 and
M2). Connect a jumper across these control circuit wires.
For this reason, module power must never be switched with the This will bypass the control contact of the module.
control circuit voltage.
Current sensing boards monitor to the compressor current. The CAUTION
ComfortLink control system takes advantage of the compressor
overload operation by locking out the compressor if current draw The motor protection system within the compressor is now
is not detected. This will prevent unnecessary compressor cycling bypassed. Use this configuration to temporarily test module
on a fault condition until corrective action can be taken. only.
Kriwan Motor Protection Module Troubleshooting
Copeland models with a “TW” in the electrical code (i.e., 2. Re-energize the control circuit and module power. If the com-
ZP182KCE-TWD), have a motor overload system that consists of pressor will not operate with the jumper installed, then the
an external Kriwan electronic control module. These have been re- problem is external to the solid-state protection system. If the
placed by the CoreSense1 communication module for motor pro- compressor operates with the module bypassed but will not
tection. This section is included for reference, and contains in- operate when the module is reconnected, then the control cir-
structions for replacing the Kriwan module with the CoreSense cuit relay in the module is open. Remove the temporary
module in the field. jumper installed in Step 1.
Follow the steps listed below to troubleshoot the Kriwan module 3. The thermistor protection chain now needs to be tested to
in the field. See wiring diagram on terminal box cover, or Fig. 63. determine if the module’s control circuit relay is open due to
excessive internal temperatures or a faulty component.
Check the thermistor protection chain located in the compres-
sor as follows:
1. Third-party trademarks and logos are the property of their respective
owners. a. De-energize control circuit and module power.

88
 b. Remove the sensor leads from the module (S1 and S2). ers, remove the M1, M2, T1, T2, S1 and S2 wires from the
c. Measure the resistance of the thermistor protection chain Kriwan motor protector module.
through these sensor leads with an ohm meter. 4. Gently bend the holding tabs holding the Kriwan module in
the terminal box and remove the Kriwan module from the ter-
CAUTION minal box. See Fig. 64.
5. Take note of the S1-S2 plug orientation on the compressor
Use an ohmmeter with a maximum of 9 volts to check the sen- thermistor fusite. Remove the S1-S2 wire harness and plug
sor chain. The sensor chain is sensitive and easily damaged; no from the compressor.
attempt should be made to check continuity through it with
anything other than an ohmmeter. The application of any
external voltage to the sensor chain may cause damage requir-
ing the replacement of the compressor. Holding
Tab
d. The diagnosis of this resistance reading is as follows:
• 200 to 2250 ohms: Normal operating range
• 2750 ohms or greater: Compressor overheated. Allow
time to cool.
• Zero resistance: Shorted sensor circuit. Replace the
compressor.
• Infinite resistance: Open sensor circuit. Replace Holding
the compressor. Tab
a38-7310
4. If the resistance reading is abnormal, remove the sensor con-
nector plug from the compressor and measure the resistance Fig. 64 — Kriwan Motor Protection Module Removal
at the sensor fusite pins. This will determine if the abnormal
reading was due to a faulty connector. Installing the CoreSense communications module:
1. A new S1-S2 thermistor wiring harness is shipped with the
5. On initial start-up, and after any module trip, the resistance of CoreSense kit and must be used. The wiring harness connec-
the sensor chain must be below the module reset point before tor block should be fully inserted on the three pins in the ori-
the module circuit will close. Reset values are 2250 to entation shown in Fig. 65 for proper operation.
3000 ohms.
6. If the sensor chain has a resistance that is below 2250 ohms,
and the compressor will run with the control circuit bypassed,
but will not run when connected properly, the solid-state
module is defective and should be replaced. The replacement
module must have the same supply voltage rating as the orig-
inal module. Install in this
Orientation
CoreSense Replacement of Kriwan Motor Protection Module
The Kriwan module has been replaced by the CoreSense commu-
nication module for motor protection. Minor wiring changes are
required as described below.

WARNING

Electrical shock can cause personal injury and death. Shut off
all power to this equipment during installation and service.
There may be more than one disconnect switch. Tag all dis-
connect locations to alert others not to restore power until
work is completed.

WARNING
Fig. 65 — Compressor Motor Sensor Harness
Installation
Do not supply power to unit with compressor cover removed.
Failure to follow this warning can cause a fire, resulting in per- 2. Review the DIP switch settings on the CoreSense module.
sonal injury or death. DIP switch no. 1 should be ON (up position) and all other
DIP switches should be OFF (down position). See Fig. 66.
Removing the Kriwan motor protection module:
1. Disconnect and lock out the high voltage and control voltage
supply to the unit.
2. Using a straight blade screwdriver, carefully depress the tabs
holding the terminal cover to the terminal box to remove the
terminal cover. Before proceeding, use a volt meter to verify
that the power has been disconnected from the unit.
3. Using wire markers, label the M1, M2, T1, and T2 wires that
are connected to the Kriwan module. Using needle nose pli-

89
 Motor thermistors are connected to the CoreSense communication
1 2 3 4 5 6 7 8 9 10 module via a 2x2 plug (Fig. 68).
O ON
F
The CoreSense communications module has field configurable
F DIP switches for addressing and configuring the module. The DIP
switches should be addressed as shown in Table 48.
OFF OFF OFF OFF OFF OFF OFF OFF OFF The CoreSense communication module has a green and a red
light-emitting diode (LED). A solid green LED indicates the mod-
Rocker Down A38-7812
ule is powered and operation is normal. A solid red LED indicates
an internal problem with the module. If a solid red LED is encoun-
Fig. 66 — CoreSense Communication DIP Switch tered, power down the module (interrupt the T1-T2 power) for 30
Settings for Kriwan Retrofit seconds to reboot the module. If a solid red LED is persistent,
3. Install the CoreSense module in the compressor terminal box change the CoreSense module.
as shown in Fig. 67, with the tabs holding the module in The CoreSense module communicates warning codes via a green
place. Route the thermistor wire harness as shown and plug flashing LED. Warning codes do not result in a trip or lockout
the harness into the 2x2 socket on the CoreSense module. condition. Alert codes are communicated via a red flashing LED.
Alert codes will result in a trip condition and possibly a lockout
4. Connect the previously labeled M1, M2, T1, and T2 wires to condition. See wiring diagram on terminal box cover, or Fig. 69.
the appropriate terminals on the CoreSense module. The flash code corresponds to the number of LED flashes, fol-
5. Connect the L1, L2, and L3 phase sensing wires to the L1, lowed by a pause; then the flash code is repeated. A lockout condi-
L2, and L3 compressor terminal block connections. See the tion produces a red flash, followed by a pause, a solid red, a sec-
compressor terminal cover diagram for identification of the ond pause, and then repeated. Table 49 lists the flash code infor-
L1, L2, and L3 terminal block connections. mation for Warning and Alert codes along with code reset and
troubleshooting information.
6. Double-check the installation and make sure all connections
are secure. Install the compressor terminal cover.
The CoreSense retrofit is complete and the system can be put back
into service. Motor Scroll
PTC NTC Circuit
Circuit (Not Used)
Red
For Future Common
Black Use Connection

Fig. 68 — CoreSense Communication

White Motor Thermistor Plug
Holding
Tab LEDs
1 2 3 4 5 6 7 8 9 10
T2 T1 L1 L2 L3

DIP Switches Motor Thermal

Thermistor R Sensors
Black Wire Harness 1 2 3 4 5 6 7 8 9 10

Plugged Into G Jumper

White 2x2 Socket
Communication
Port
Holding
Blue Tab M2 M1
T2 T1 L1 L2 L3 Control Circuit
Fig. 67 — CoreSense Communication Module Mounting Connections
CoreSense Communications Module Troubleshooting
Copeland models with a “TE” in the electrical code (i.e., Module Compressor Phase
ZP182KCETED) have a motor overload system that consists of Power Sensing
an external CoreSense communication electronic control module.
Fig. 69 — CoreSense Communication Motor
Protection Wiring

Table 48 — CoreSense Communication Module DIP Switch Settings

DIP SWITCH
COPELAND ELECTRICAL CODE
1 2 3 4 5 6 7 8 9 10
“TE” ON OFF OFF OFF OFF OFF OFF OFF ON OFF
“TW”a ON OFF OFF OFF OFF OFF OFF OFF OFF OFF
NOTE(S):
a. Settings for Kriwan retrofit. See “CoreSense Replacement of Kriwan Motor Protection Module” on page 89.

90
 Table 49 — CoreSense Communication Module LED Flash Codes

LED STATUS FAULT CONDITION FAULT CODE FAULT CODE RESET TROUBLESHOOTING
DESCRIPTION INFORMATION
None, normal operation Module is powered and Not applicable None
SOLID GREEN
under normal operation
Module malfunction Module has an internal fault Not applicable 1. Reset module by removing
SOLID RED power from T1-T2.
2. Replace module.
WARNING LED FLASH
Loss of communication Module and Master Control- Automatic when communi- Not Supported. Check DIP
GREEN FLASH CODE 1 ler have lost communica- cations are re-established Switch settings.
tions with each other for
more than 5 minutes
GREEN FLASH CODE 2 Not used Not applicable Not applicable Not applicable
Short cycling Run time of less than 1 min- Fewer than 48 short cycles 30RAP controls do not allow
ute. Number of short cycles in 24 hours this operation normally. Con-
GREEN FLASH CODE 3
exceeds 48 in a 24-hour firm proper wiring and DIP
period. switch settings.
Open/Shorted Scroll Not applicable Not applicable Not applicable
GREEN FLASH CODE 4
Thermistor
GREEN FLASH CODE 5 Not used Not applicable Not applicable Not applicable
ALERT/LOCKOUT LED FLASH
High motor temperature Thermistor resistance Thermistor resistance less 1. Check power supply.
greater than 4500 . Lock- than 2750  and 30 minutes 2. Check system charge and
RED FLASH CODE 1 out occurs after 5 alerts. have elapsed superheat.
3. Check compressor
contactor.
Open/shorted motor  Thermistor resistance Thermistor resistance is 1. Check for poor connections
thermistor greater than 4500 , or less between 100 and 2750  at module and thermistor
than 100 . Lockout occurs and 30 minutes have fusite.
RED FLASH CODE 2 after 6 hours. elapsed 2. Check continuity of thermis-
tor wiring harness.
3. Check for an open thermis-
tor circuit.
Short cycling Run time of less than 1 min- Interrupt power to T2-T1 30RAP controls do not allow
ute. Lockout if the number of this operation normally. Con-
RED FLASH CODE 3 alerts exceeds the number firm proper wiring.
configured by the user in 24
hours.
RED FLASH CODE 4 Scroll high temperature Not applicable Not applicable Not applicable
RED FLASH CODE 5 Not used Not applicable Not applicable Not applicable
Missing phase Missing phase detected. After 5 minutes and missing 1. Check incoming power.
RED FLASH CODE 6 Lockout after 10 consecutive phase condition is not pres- 2. Check fuses or circuit
alerts. ent breakers.
3. Check compressor contactor.
Reverse phase Reverse phase detected. Interrupt power to T2-T1 1. Check incoming power
Lockout after 1 alert. phase sequence
RED FLASH CODE 7 2. Check compressor contactor
3. Check module phase wiring
A-B-C.
RED FLASH CODE 8 Not used Not applicable Not applicable Not applicable
Module low voltage Less than 18 vac supplied to After 5 minutes and voltage This alert does not result in a
module is between 18 and 30 vac lockout fault.
RED FLASH CODE 9 1. Verify correct 24 vac mod-
ule is installed.
2. Check for a wiring error.

Warning Codes (Green LED Flash Code): • Code 4 – Open/Shorted Scroll Thermistor: The module
• Code 1 – Loss of Communication: The module will flash will flash the green Warning LED four times, indicating
the green Warning LED one time indicating the module that the scroll NTC thermistor has a resistance value that
has not communicated with the master controller for lon- indicates an open/shorted thermistor. The Warning will be
ger than 5 minutes. Once communication is reinitiated, the cleared when the resistance value is in the normal range.
Warning will be cleared. The 30RAP units do not support The 30RAP units do not utilize a scroll thermistor.
the communication capability of this module. • Code 5 – Not used.
• Code 2 – Reserved For Future Use Alert/Lockout Codes (Red LED Flash Code):
• Code 3 – Short Cycling: The module will flash the green • Code 1 – Motor High Temperature: The module will flash
Warning LED three times indicating the compressor has the red Alert LED one time indicating the motor PTC cir-
short cycled more than 48 times in 24 hours. A short cycle cuit has exceeded 4500 . A Code 1 Alert will open the
is defined as compressor runtime of less than 1 minute. M2-M1 contacts. The Alert will reset after 30 minutes and
The Warning will be activated when the “Short Cycling” the M2-M1 contacts will close if the resistance of the mo-
DIP Switch (no. 10) is OFF (in the down position). When tor PTC circuit is below 2750 . Five consecutive Code 1
fewer than 48 short cycles are accumulated in 24 hours the Alerts will lock out the compressor. Once the module has
Warning code will be cleared. locked out the compressor, a power cycle will be required
for the lockout to be cleared.

91
• Code 2 – Open/Shorted Motor Thermistor: The module Copeland replacement compressors are shipped with two solid-
will flash the red Alert LED 2 times indicating the motor stage motor protection modules. A 120/240-volt module is in-
PTC thermistor circuit has a resistance value greater than stalled and a 24-volt module is shipped with the compressor. The
2200  or less than 100 . that indicates an open/shorted 30RAP units require the 24-volt module be field installed. Failure
thermistor chain. A Code 2 Alert will open the M2-M1 to install the 24-volt module will result in a compressor failure
contacts. The Alert will reset after 30 minutes and the M2- alarm. See Fig. 70.
M1 contacts will close if the resistance of the motor PTC
circuit is back in the normal range. The module will lock LEDs
out the compressor if the trip condition exists for longer DIP Switches Motor Thermal
than 6 hours. Once the module has locked out the compres- R Sensors
sor, a power cycle will be required to clear the lockout.
1 2 3 4 5 6 7 8 9 10

G Jumper
• Code 3 – Short Cycling: The module will flash the red
Communication
Alert LED 3 times indicating the compressor is locked out Port
due to short cycling. A Code 3 Alert will open the M2-M1
contacts. Code 3 will be enabled when the Short Cycling M2 M1
DIP switch (no. 10) is ON (in the up position) and the T2 T1 L1 L2 L3
compressor has exceeded the number of short cycles con- Control Circuit
Connections
figured by the user in a 24-hour period. Once the module
has locked out the compressor, a power cycle will be re-
quired to clear the lockout. Module Compressor Phase
Power
• Code 4 – Scroll High Temperature: The module will flash Sensing
the red Alert LED 4 times indicating the scroll NTC circuit Fig. 70 — Solid-State Motor Protection Module
is less than 2400 . A Code 4 Alert will open the M2-M1
contacts. The Alert will reset after 30 minutes and the M2- Danfoss Electronic Module Replacement of Kriwan Motor
M1 contacts will close if the resistance of the scroll NTC Protection Module
circuit is higher than 5100 . The module will lock out the The Kriwan module has been replaced by the Danfoss communi-
compressor if the number of Code 4 Alerts exceeds the cation module for motor protection on all Danfoss compressors.
user configurable number of Code 4 events within a 24-
hour period. Once the module has locked out the compres- Motor Overheating and Overloading — The motor protector
sor, a power cycle will be required to clear the lockout. comprises a control module and PTC sensors embedded in the
motor winding. The close contact between thermistors and wind-
• Code 5 – Not used. ings ensures a very low level of thermal inertia.
• Code 6 – Missing Phase: The module will flash the red The motor temperature is constantly measured by a PTC thermis-
Alert LED 6 times indicating a missing phase in one of the tor loop connected on S1-S2. If the thermistor exceeds its response
three leads to the compressor. A Code 6 Alert will open the temperature, its resistance increases above the trip level (4,500 )
M2-M1 contacts. The Alert will reset after 5 minutes and and the output relay then trips; i.e., contacts M1-M2 are open. Af-
the M2-M1 contacts will close if the missing phase condi- ter cooling to below the response temperature (resistance <
tion is not present. The module will lock out the compres- 2,750 ), a 5-minute time delay is activated.
sor after 10 consecutive Code 6 Alerts. Once the module
has locked out the compressor, a power cycle will be re- After this delay has elapsed, the relay is once again pulled in; i.e.,
quired to clear the lockout. contacts M1-M2 are closed. The time delay may be canceled by
means of resetting the mains (L-N-disconnect) for approximately
• Code 7 – Reverse Phase: The module will flash the red 5 seconds.
Alert LED 7 times indicating a reverse phase in two of the
three leads to the compressor. A Code 7 Alert will open the A red/green twin LED is visible on the module. A solid green
M2-M1 contacts. The module will lock out the compressor LED denotes a fault-free condition. A blinking red LED indicates
after one Code 7 Alert. A power cycle will be required to an identifiable fault condition. See Fig. 71 and 72.
clear the lockout.
• Code 8 – Not used.
• Code 9 – Module Low Voltage: The module will flash the
red Alert LED 9 times indicating low module voltage, less
than 18 vac on the T2-T1 terminals for more than 5 sec-
onds. A Code 9 Alert will open the M2-M1 contacts. The
Alert will reset after 5 minutes and the M2-M1 contacts
will close if the T2-T1 voltage is above the reset value in
18 to 30 vac.
Resetting Alert codes can be accomplished manually by cycling
power to the module (disconnect T2 or T1 for 5 seconds). If the
fault that initiated the Alert code is absent after the reset is per-
formed, the Alert code will be cleared and CoreSense module will
allow normal operation. If the fault is still present after the reset is
performed, the fault code will continue to be displayed via the
green or red flashing LED.
Troubleshooting procedures described for the Kriwan module sec-
tion (page 88) are applicable to the CoreSense communication Fig. 71 — PTC Overheat
module.

92
 Fig. 72 — PTC Reset Delay Active Fig. 75 — In Case of Phase Reverse Error
(after PTC Overheat)
Internal Module Failure Protection — An internal microproces-
Phase Loss, Phase Sequence — The electronic module provides sor fault leads to trip; relay contacts M1-M2 open.
protection against phase reversal and phase loss at start-up. Fault Diagnosis — If the relay contacts M1-M2 are open, carry
The circuit should be thoroughly checked in order to determine out the following steps:
the cause of the phase problem before re-energizing the control 1. Check all electrical connections (wiring, drawing conformity,
circuit. The phase sequencing and phase loss monitoring functions connection tightness, etc.)
are active during a 5-second window 1 second after the compres- 2. Try to reset by interrupting mains supply to the module for
sor start-up (power on L1-L2-L3). See Fig. 73. at least 5 seconds.
If, after reset, the relay contacts M1-M2 are closed, a fault in
motor power supply or high motor temperature caused a trip
condition (missing phase, wrong phase sequence, operating
outside of the compressor operating envelope, etc.).
If the relay contacts M1-M2 remain open:
a. Disconnect PTC thermistor leads and measure the resis-
tance value at this point (max measurement voltage 3V).
• R=: PTC loop opened; remove compressor.
Fig. 73 — Phase Sequence Module Logic • R>2750: wait until compressor motor winding tem-
Should one of these parameters be incorrect, the relay would lock perature has cooled down, then reconnect PTC and
out (contact M1-M2 [or 11-14] open). The red LED on the module try to reset; check root causes of motor overheating
will show the following blink code (Fig. 74 and 75). (operation outside of working envelope, etc.).
The lockout may be canceled by resetting the power mains (dis- • 150<R<1250: normal resistance value for PTC at
connect L-N) for approximately 5 seconds. ambient temperature; continue with Step 2.b.
• R=0: PTC loop in short circuit; replace compressor.
b. Test the module itself within the terminal box:
• Disconnect L-N.
• Disconnect S1-S2.
• Disconnect M1-M2.
• Reconnect mains supply L-N.
• Bridge S1-S2.
• Try to reset by interrupting mains supply to the mod-
ule for at least 5 seconds.
• Check relay contacts M1-M2 with ohmmeter. If relay
contacts M1-M2 are closed, module is okay. If relay
contacts M1-M2 are still open, replace module.
High Discharge Gas Temperature Protection
Units equipped with digital compressors have an additional therm-
istor located on the discharge line. If discharge temperature ex-
ceeds 265°F (129.4°C), the digital compressor will be shut off.
Fig. 74 — In Case of Phase Loss Error Alarms will also occur if the current sensor board malfunctions
or is not properly connected to its assigned digital input. If the
compressor is commanded OFF and the current sensor reads
ON, an alert is generated. This will indicate that a compressor
contactor has failed closed. In this case, a special mode, Com-
pressor Stuck on Control, will be enabled and all other compres-
sors will be turned off. An alarm will then be enabled to indicate
that service is required. Outdoor fans will continue to operate.
The first outdoor fan stage is turned on immediately. The other
stages of fan will be turned on as required by SCT.

93
Alarms and Alerts IMPORTANT: If the CS is always detecting current, verify that
These are warnings of abnormal or fault conditions, and may the compressor is on. If the compressor is on, check the contac-
cause either one circuit or the whole unit to shut down. They are tor and the relay on the MBB. If the compressor is off and there
assigned code numbers as described in Table 45. is no current, verify the CSB wiring and replace if necessary.
If the unit is in alarm and unable to operate, Control Mode (STAT)
= 4 (Off Emrgcy). IMPORTANT: Return to Normal mode and observe compressor
Automatic alarms will reset without operator intervention if the operation to verify that compressor current sensor is working
condition corrects itself. The following method must be used to re- and condenser fans are energized.
set manual alarms:
Before resetting any alarm, first determine the cause of the alarm COMPRESSOR STUCK ON FAILURE ALARMS
and correct it. Enter the Alarms mode indicated by the LED on the Circuit A A051, A052, A053
side of the scrolling marquee display. Press ENTER and un- Circuit B A055, A056, A057
til the sub-menu item RCRN “RESET ALL CURRENT Alarm codes A051, A052, A053, A055, A056, and A057 are for
ALARMS” is displayed. Press ENTER . The control will prompt compressors A1, A2, A3, B1, B2, and B3. These alarms occur
the user for a password, by displaying PASS and WORD. Press when the CSB detects current when the compressor should be off.
ENTER to display the default password, 1111. Press ENTER for When this occurs, the control turns off the compressor.
each character. If the password has been changed, use the arrow If the current sensor board reads ON while the compressor relay
keys to change each individual character. Toggle the display to has been commanded OFF for a period of 4 continuous seconds,
“YES” and press ENTER . The alarms will be reset. an alarm is generated. These alarms are only monitored for a peri-
od of 10 seconds after the compressor relay has been commanded
COMPRESSOR FAILURE ALERTS OFF. This is done to facilitate a service technician forcing a relay
T051, T052, T053 (Circuit A Compressor Failures) to test a compressor.
T055, T056, T057 (Circuit B Compressor Failures) In addition, if a compressor stuck failure occurs and the current
Alert codes T051-T053 are for compressors A1-A3, respectively, sensor board reports the compressor and the request off, certain di-
and T055-T057 are for compressors B1-B3, respectively. These agnostics will take place as follows:
alerts occur when the current sensor (CS) does not detect com- 1. If any of the compressors are diagnosed as stuck on and
pressor current during compressor operation. When this occurs, the current sensor board is on and the request is off, the
the control turns off the compressor. control will command the condenser fans to maintain nor-
If the current sensor board reads OFF while the compressor relay mal head pressure.
has been commanded ON, an alert is generated. 2. The control will shut off all other compressors.
POSSIBLE CAUSES The possible causes include welded contactor or frozen
Compressor Overload compressor relay on the MBB.
Either the compressor internal overload protector is open or the To check out alarms A051-A057:
external overload protector (Kriwan module) has activated. The 1. Place the unit in Service Test mode. All compressors
external overload protector modules are mounted in the compres- should be off.
sor wiring junction box. Temperature sensors embedded in the 2. Verify that there is not 24 v at the contactor coil. If there is
compressor motor windings are the inputs to the module. The 24 v at the contactor, check relay on MBB and wiring.
module is powered with 24 vac from the units main control box. 3. Check for welded contactor.
The module output is a normally closed contact that is wired in se- 4. Verify CSB wiring.
ries with the compressor contactor coil. In a compressor motor
overload condition, contact opens, deenergizing the compressor 5. Return to Normal mode and observe compressor operation
contactor. to verify that compressor current sensor is working and
condenser fans are energized.
Low Refrigerant Charge
If the compressor operates for an extended period of time with low Circuit A A051, A052, A053 (Chattering Failure)
refrigerant charge, the compressor ASTP device will open, which Circuit B A055, A056, A057 (Chattering Failure)
will cause the compressor to trip on its overload protection device. Alarm codes A051, A052, A053 are for compressors A1, A2, and
Circuit Breaker Trip A3: A055, A056, and A057 are for compressors B1, B2, and B3.
The compressors are protected from short circuit by a breaker in The compressor is commanded ON. If the compressor feedback
the control box. indicates a feedback regular expression of 11*00*11*0 during any
given 16-sec. time period, the alert is tripped. In regular expres-
Wiring Error sion notation X* means any number of occurrences of X (includ-
A wiring error might not allow the compressor to start. ing 0 occurrences). For the expression 11*00*11*0, read as at
To check out alerts T051-T057: least 1 ON state, followed by at least 1 OFF state, followed by at
least one ON state, followed by one OFF state. (In the given ex-
1. Turn on the compressor in question using Service Test pression, 1 is ON, 0 is OFF.) When this occurs, the control turns
mode. If the compressor does not start, then most likely off the compressor and a manual reset is required.
the problem is one of the following: HPS open, open inter-
nal protection, circuit breaker trip, incorrect safety wiring, POSSIBLE CAUSES
or incorrect compressor wiring. Typically this failure will indicate that the high pressure switch
2. If the compressor does start, verify it is rotating in the cor- (HPS) is chattering. The HPS is in series with the 24 VAC that is
rect direction. providing power to the on-board relay (which in turn is powering
the coil of the compressor contactor). It is possible for the HPS to
IMPORTANT: Prolonged operation in the wrong direction can reset faster than the control can detect it reliably (without experi-
damage the compressor. Correct rotation can be verified by a encing nuisance trips), thus the need for chattering compressor
gage set and looking for a differential pressure rise on start-up. logic. Note that the HPS also has chattering logic applied to it.

94
A060 (Cooler Leaving Fluid Thermistor Failure) T110 (Circuit A Loss of Charge)
If the sensor reading is outside the range of –40 to 245°F (–40 to T111 (Circuit B Loss of Charge)
118°C) then the alarm will occur. The cause of the alarm is usually Alert codes T110 and T111 are for circuits A and B, respectively.
a faulty thermistor, a shorted or open thermistor caused by a wir- These alerts occur when the compressor is OFF and the discharge
ing error, or a loose connection. Failure of this thermistor will shut pressure is less than 26 psig.
down the entire unit.
T112 (Circuit A High Saturated Suction Temperature)
A061 (Cooler Entering Thermistor Failure)
T113 (Circuit B High Saturated Suction Temperature)
If the sensor reading is outside the range of –40 to 240°F (–40 to
116°C) then the alarm will occur. The cause of the alarm is usually Alert codes T112 and T113 occur when compressors in a circuit
a faulty thermistor, a shorted or open thermistor caused by a wir- have been running for at least 5 minutes and the circuit saturated
ing error, or a loose connection. Failure of this thermistor will shut suction temperature is greater than 70°F (21.1°C). The high satu-
down the entire unit. rated suction alert is generated and the circuit is shut down.
T068, T069 (Circuit A,B Compressor Return Gas Tempera- T114 (Circuit A Low Suction Superheat)
ture Thermistor Failure) T115 (Circuit B Low Suction Superheat)
This alert occurs when the compressor return gas temperature sen- Alert codes T114 and T115 occur when the superheat of a circuit
sor is outside the range of –40 to 240°F (–40 to 116°C). Failure of is less than 5°F (2.8°C) for 5 continuous minutes. The low super-
this thermistor will shut down the appropriate circuit. heat alert is generated and the circuit is shut down.
T073 (Outside Air Temperature Thermistor Failure) T116 (Circuit A Low Cooler Suction Temperature)
This alert occurs when the outside air temperature sensor is out- T117 (Circuit B Low Cooler Suction Temperature)
side the range of –40 to 240°F (–40 to 116°C). Failure of this Alert codes T116 and T117 are for circuits A and B, respectively.
thermistor will disable any elements of the control which require These alerts are generated if the capacity stages are reduced three
its use. times without a 30 minute interval between capacity reductions
T074 (Space Temperature Thermistor Failure) due to operating mode 7 or mode 8.
This alert occurs when the space temperature sensor is outside the T118 (High Discharge Gas Temperature Alert)
range of –40 to 245°F (–40 to 118°C). Failure of this thermistor A118 (High Discharge Gas Temperature Alarm)
will disable any elements of the control which requires its use. The
cause of the alert is usually a faulty thermistor in the T55 or T58 This alert or alarm occurs for units which have the digital com-
device, a shorted or open thermistor caused by a wiring error, or a pressor installed on circuit A. If discharge gas temperature is
greater than 268°F (131.1°C), the circuit will be shut off. The alert
loose connection.
will reset itself when discharge temperature is less than 250°F
T077 (Circuit A Saturated Suction Temperature exceeds (121.1°C). If this alert occurs 3 times within a day, the A118 alarm
Cooler Leaving Fluid Temperature) will be generated and the alarm must be reset manually. The cause
T078 (Circuit B Saturated Suction Temperature exceeds of the alert is usually low refrigerant charge or a faulty thermistor.
Cooler Leaving Fluid Temperature) T126 (Circuit A High Head Pressure)
Alert codes T077 and T078 occur when a compressor in a circuit T127 (Circuit B High Head Pressure)
has been running and the saturated suction temperature is greater
than the cooler leaving water temperature for 5 minutes. The alert Alert codes T126 and T127 are for circuits A and B, respectively.
is generated and the circuit is shut down. The alert automatically These alerts occur when the appropriate saturated condensing
temperature is greater than the operating envelope shown in
resets when the saturated suction temperature is less than the leav-
ing water temperature minus 1°F (0.5°C). Fig. 28 or 29. Prior to the alert, the control will shut down one
compressor on a circuit if that circuit’s saturated condensing tem-
T090 (Circuit A Discharge Pressure Transducer Failure) perature is greater than the maximum SCT minus 5°F (2.7°C). If
T091 (Circuit B Discharge Pressure Transducer Failure) SCT continues to rise to greater than the maximum SCT, the alert
Alert codes T090 and T091 are for circuits A and B, respective- will occur and the circuit’s remaining compressor will shut down.
ly. These alerts occur when the pressure is outside the range of The cause of the alarm is usually an overcharged system, high out-
0.0 to 667.0 psig. A circuit cannot run when this alert is active. door ambient temperature coupled with dirty outdoor coil, non-
Use the scrolling marquee to reset the alert. The cause of the condensables, faulty condenser fan motor, plugged filter drier, or a
alert is usually a faulty transducer, faulty 5-v power supply, or a faulty high-pressure switch.
loose connection. T133 (Circuit A Low Suction Pressure)
T092 (Circuit A Suction Pressure Transducer Failure) T134 (Circuit B Low Suction Pressure)
T093 (Circuit B Suction Pressure Transducer Failure) Alert codes T133 and T134 are for circuits A and B, respectively.
Alert codes T092 and T093 are for circuits A and B, respective- These alerts are generated if one of the two following conditions is
ly. These alerts occur when the pressure is outside the range of satisfied: the circuit suction pressure is below 34 psig (234.4 kPa)
0.0 to 420.0 psig. A circuit cannot run when this alert is active. for 8 seconds, or the suction pressure is below 23 psig (158.6 kPa).
Use the scrolling marquee to reset the alert. The cause of the The cause of this alert may be low refrigerant charge, plugged liq-
alert is usually a faulty transducer, faulty 5-v power supply, or a uid line filter drier, or sticking EXV. Check head pressure opera-
loose connection. tion. If not equipped, consider adding low ambient temperature
head pressure control.
T094 (Discharge Gas Thermistor Failure)
Add wind baffles if required.
This alert occurs for units which have the digital compressor in-
stalled on circuit A. If discharge gas temperature is open or short- A140 (Reverse Rotation Detected)
ed, the circuit will be shut off. The alert will reset itself when dis- A test is made once, when compressor is energized, for suction
charge temperature is less than 250°F (121.1°C). The cause of the pressure change on the first activated circuit. The unit control de-
alert is usually low refrigerant charge or a faulty thermistor. termines failure as follows:
1. The suction pressure of both circuits is sampled 5 seconds
before the compressor is brought on, right when the com-
pressor is brought on, and 5 seconds afterwards.

95
2. The rate of suction pressure change from 5 seconds before T173 (Energy Management Module Communication Failure)
the compressor is brought on to when the compressor is This alert indicates that there are communications problems with
brought on is calculated. the energy management. All functions performed by the EMM
3. The rate of suction pressure change from when the will stop, which can include demand limit, reset and capacity in-
compressor is brought on to 5 seconds afterwards is put. The alarm will automatically reset.
calculated. T174 (4 to 20 mA Cooling Set Point Input Failure)
4. With the above information, the test for reverse rotation is This alert indicates a problem has been detected with cooling set
made. If the suction pressure change 5 seconds after com- point 4 to 20 mA input. The input value is either less than 2 mA or
pression is greater than the suction pressure change 5 sec- greater than 22 mA.
onds before compression – 1.25, then there is a reverse T175 (Loss of Communication with the AUX Board)
rotation error.
This alarm indicates that there are communications problems with
This alarm will disable mechanical cooling and will require manu- the AUX board. All functions performed by the AUX board will
al reset. stop, which can include digital scroll unloader operation and low
A150 (Unit is in Emergency Stop) ambient head pressure control. The alarm will automatically reset.
If the CCN emergency stop command is received, the alarm is T176 (4 to 20 mA Reset Input Failure)
generated and the unit will be immediately stopped. This alert indicates a problem has been detected with reset 4 to
If the CCN point name “EMSTOP” in the system table is set to 20 mA input. The input value is either less than 2 mA or greater
emergency stop, the unit will shut down immediately and broad- than 22 mA. The reset function will be disabled when this occurs.
cast an alarm back to the CCN, indicating that the unit is down. T177 (4 to 20 mA Demand Limit Input Failure)
This alarm will clear when the variable is set back to “enable.” This alert indicates a problem has been detected with demand lim-
A151 (Illegal Configuration) it 4 to 20 mA input. The input value is either less than 2 mA or
An A151 alarm indicates an invalid configuration has been en- greater than 22 mA. The reset function will be disabled when this
tered. The following are illegal configurations. occurs.
• Invalid unit size has been entered. A179 (Fan VFD Communication Failure)
• Fluid is water with ICE making configured. This alarm indicates that there are communications problems be-
• Incorrect AUX board installed with Motormaster config- tween MBB and fan VFD. When this alarm occurs, the chiller will
shut down. Reset is automatic when all alarms are cleared.
ured (AUX 1 must be used).
• Incorrect AUX software version (must be 3.0 or higher). A189 (Cooler Pump Auxiliary Contacts Inputs Miswired)
A152 (Unit Down Due to Failure) This alarm indicates that Pump 1 auxiliary contacts are closed
when Pump 2 output is energized or Pump 2 auxiliary contacts are
Both circuits are off due to alerts and/or alarms. Reset is automatic closed when Pump 1 output is energized. When this alarm occurs,
when all alarms are cleared. This alarm indicates the unit is at 0% both pump outputs are turned off. Reset is automatic when all
capacity. alarms are cleared.
T153 (Real Time Clock Hardware Failure) T190 (Cooler Pump 1 Aux Contacts Failed to Close at Start-Up)
A problem has been detected with MBB real time clock hardware. This alert indicates that Pump 1 auxiliary contacts did not close
Try resetting the power and check the indicator lights. If the alarm within 26 seconds after Pump 1 was started. When this alert oc-
continues, the board should be replaced. curs, Pump 1 will be turned off. Pump 2 will be started if avail-
A154 (Serial EEPROM Hardware Failure) able. Manual reset is required for this alert.
A problem has been detected with the EEPROM on the MBB. Try T191 (Cooler Pump 2 Aux Contacts Failed to Close at Start-Up)
resetting the power and check the indicator lights. If the alarm This alert indicates that Pump 2 auxiliary contacts did not close
continues, the board should be replaced. within 26 seconds after Pump 2 was started. When this alert oc-
T155 (Serial EEPROM Storage Failure Error) curs, Pump 2 will be turned off. Pump 1 will be started if avail-
A problem has been detected with the EEPROM storage on the able. Manual reset is required for this alert.
MBB. Try resetting the power and check the indicator lights. If the T192 (Cooler Pump 1 Failed to Provide Flow at Start-Up)
alert continues, the board should be replaced. This alert indicates that Pump 1 did not provide flow to close flow
A156 (Critical Serial EEPROM Storage Failure Error) switch within 60 seconds after Pump 1 was started. When this
A problem has been detected with the EEPROM storage on the alert occurs, Pump 1 will be turned off. Pump 2 will be started if
MBB. Try resetting the power and check the indicator lights. If the available. Manual reset is required for this alert.
alarm continues, the board should be replaced. T193 (Cooler Pump 2 Failed to Provide Flow at Start-Up)
A157 (A/D Hardware Failure) This alert indicates that Pump 2 did not provide flow to close flow
A problem has been detected with A/D conversion on the boards. switch within 60 seconds after Pump 2 was started. When this
Try resetting the power and check the indicator lights. If the alarm alert occurs, Pump 2 will be turned off. Pump 1 will be started if
continues, the board should be replaced. available. Manual reset is required for this alert.
T170 (Loss of Communication with the Compressor Expan- T194 (Cooler Pump 1 Aux Contacts Opened During Normal
sion Module) Operation)
This alert indicates that there are communications problems with This alert indicates that Pump 1 auxiliary contacts open for 26 sec-
the compressor expansion module. All functions performed by the onds after initially made. When this alert occurs, all compressors
CXB will stop. The alarm will automatically reset. shut down and Pump 1 will be turned off. Pump 2 will be started if
available. Chiller will be allowed to run if Pump 2 starts success-
A172 (Loss of Communication with the EXV Board) fully. Manual reset is required for this alert.
This alarm indicates that there are communications problems with T195 (Cooler Pump 2 Aux Contacts Opened During Normal
the EXV board. The alarm will automatically reset. Operation)
This alert indicates that Pump 2 auxiliary contacts open for 26 sec-
onds after initially made. When this alert occurs, all compressors

96
shut down and Pump 2 will be turned off. Pump 1 will be started if When this alarm occurs, the chiller will be shut down. The pre-
available. Chiller will be allowed to run if Pump 1 starts success- alert (P201) will be reset automatically; the alarm (A201) will re-
fully. Manual reset is required for this alert. quire manual reset.
T196 (Flow Lost While Pump 1 Running) Possible Causes:
This alert indicates that cooler flow switch contacts open for 3 sec- If this condition is encountered, check the following items:
onds after initially made, when Pump 1 is running. When this alert • chilled water flow switch, for proper operation.
occurs, all compressors shut down and Pump 1 will be turned off.
Pump 2 will be started if available. Chiller will be allowed to run if • flow switch cable, for power and control.
Pump 2 starts successfully. Manual reset is required for this alert. • chilled water loop to be sure that it is completely filled
T197 (Flow Lost While Pump 2 Running) with water, and all air has been purged.
This alert indicates that cooler flow switch contacts open for 3 sec- • chilled water pump interlock circuit for proper operation.
onds after initially made, when Pump 2 is running. When this alert In units that do not control the chilled water pump, check the
occurs, all compressors shut down and Pump 2 will be turned off. Cooler Pump Shutdown Delay (ConfigurationOPT1 
Pump 1 will be started if available. Chiller will be allowed to run if PM.DY). The factory default is set to one minute. If the unit is sig-
Pump 1 starts successfully. Manual reset is required for this alert. naled to stop and the pumps are shutdown shortly after the com-
A198 (Cooler Pump 1 Aux Contacts Closed While Pump Off) mand, this alarm may trigger. Try setting the delay to 0. Look at
the system operation sequence to be sure that the unit has enough
This alert indicates that Pump 1 auxiliary contacts closed for 2 time to shut down, before the chilled water flow stops. Check the
minutes when pump state is off. When this alarm occurs, chiller is following items:
not allowed to start. Manual reset is required for this alarm, when
aux contact becomes open. • pump electrical circuit for power.
A199 (Cooler Pump 2 Aux Contacts Closed While Pump Off) • pump circuit breaker.
This alert indicates that Pump 2 auxiliary contacts closed for 2 • pump contactor, for proper operation.
minutes when pump state is off. When this alarm occurs, Chiller is • chilled water pump for proper operation; look for overload
not allowed to start. Manual reset is required for this alarm, when trips.
aux contact becomes open. • chilled water strainer for a restriction.
P200 Cooler Flow/Interlock Contacts Failed to Close at • all isolation valves are open completely.
Start-Up Pre-Alert
A202 (Cooler Pump Interlock Closed When Pump is Off)
A200 Cooler Flow/Interlock Contacts Failed to Close at
This alarm indicates that if the chiller is configured for cooler
Start-Up Alarm
pump control, the flow switch input is closed for 5 minutes while
These alarms will occur if the cooler flow switch/cooler pump in- the pump outputs are off. When this alarm occurs, the chiller will
terlock contacts failed to close within 1 minute after start-up, if shut down. Reset is automatic when auxiliary contact becomes
cooler pump control is enabled; or within 5 minutes after start-up, open.
if cooler pump control is not enabled. If the unit is equipped with
dual pumps, the second pump will be started and time allowed to T203 (Loss of Communication with Slave Chiller)
prove flow before the unit is alarmed. When this alarm occurs, the This alert indicates that the master chiller MBB loses communica-
chiller is not allowed to start. The alarm will require manual reset. tion with the slave chiller MBB. When this alert occurs, dual
If this condition is encountered, check the following items: chiller routine will be disabled; Master/Slave will run as stand-
alone chillers. Reset is automatic when all alerts are cleared.
• chilled water flow switch, for proper operation
T204 (Loss of Communication with Master Chiller)
• flow switch cable, for power and control
This alert indicates that the slave chiller MBB loses communica-
• chilled water loop to be sure that it is completely filled tion with the master chiller MBB. When this alert occurs, dual
with water, and all air has been purged chiller routine will be disabled; Master/Slave will run as stand-
• chilled water pump interlock circuit, for proper operation alone chillers. Reset is automatic when all alerts are cleared.
• pump electrical circuit for power T205 (Master and Slave Chiller with Same Address)
• pump circuit breaker This alert indicates that the master and slave chiller have the same
• pump contactor, for proper operation CCN address (CCN.A). When this alert occurs, dual chiller rou-
tine will be disabled; Master/Slave will run as stand-alone chillers.
• chilled water pump, for proper operation; look for overload Reset is automatic when all alerts are cleared.
trips
T206 High Leaving Chilled Water Temperature Alert
• chilled water strainer for a restriction
This alert will be generated if the unit is at 100% capacity for at
• all isolation valves are open completely least 60 seconds and the Leaving Water Temperature, LWT (Run
P201 Cooler Flow/Interlock Contacts Opened During Nor- StatusVIEW) is greater than the Control Point, CTPT (Run
mal Operation Pre-Alert StatusVIEW) plus the High Leaving Chilled Water Alert Limit,
A201 Cooler Flow/Interlock Contacts Opened During Nor- LCWT (ConfigurationOPT2).
mal Operation Alarm LWT > CTPT + LCWT
If the chilled water flow switch opens for at least three (3) seconds LCWT is field selectable from 2 to 60 ΔF (1.1 to 33.3 ΔC) and is
after initially being closed, a P201 Cooler Flow/Interlock Contacts defaulted at 60 ΔF (33.3 ΔC).
Opened During Normal Operation Pre-Alert will be generated for The unit will not generate this alert if Capacity, CAP (Run Status
the appropriate pump and the machine will stop. If available, the VIEW) is less than 100%. If the unit’s available capacity is less
other pump will be started. If flow is proven, the machine will be than 100%, this alert will not be generated.
allowed to restart. If after 5 minutes, the cooler flow switch/inter-
lock contacts do not close, the alarm will change to an A201 Cool- No action will be taken; this is an alert only.
er Flow/Interlock Contacts Opened During Normal Operation This alert will reset automatically if one of two conditions is met:
Alarm. 1. If the Leaving Water Temperature, LWT (Run Status 
VIEW) is less than the Control Point, CTPT (Run Sta-
tus VIEW) plus the High Leaving Chilled Water Alert

97
 Limit, LCWT (ConfigurationOPT2) minus 5°F “YES” for Strainer Maintenance Done (S.T.MN) item to clear the
(2.8°C).  alert. Reset is automatic when all alerts are cleared.
LWT < CTPT + LCWT – 5°F (2.8°C) T303 (Condenser Coil Maintenance Due)
2. If the Leaving Water Temperature, LWT (Run Sta- This alert indicates that Coil Service Countdown (C.L.DN) ex-
tusVIEW) is less than the Control Point, CTPT (Run pired. Complete the condenser coil cleaning and enter “YES” for
StatusVIEW).  Coil Maintenance Done (C.L.MN) item to clear the alert. Reset is
LWT < CTPT automatic when all alerts are cleared.
If this condition is encountered, check to be sure building load A412 (Variable Speed Fan Motor/Drive Failure)
does not exceed unit capacity. This alarm indicates that there is a variable speed fan motor/VFD
A207 (Cooler Freeze Protection) related alarm. See Tables 45 and 46 for details. When this alarm
This alarm indicates that cooler EWT or LWT is less than Brine occurs, chiller will shut down, or is not allowed to start. Reset is
Freeze (BR.FZ). When this alarm occurs, chiller will shut down; automatic when all alarms are cleared.
the cooler pump will continue to run a minimum of 5 minutes if T413 (Variable Speed Fan Motor/Drive Failure)
control enabled. Both EWT and LWT must be at least 6°F (3.3°C) This alert indicates that there is a variable speed fan motor/VFD
above the brine freeze point (BR.FZ) to clear the alarm. The alarm related alert See Tables 45 and 46 for details. When this alert oc-
will be cleared automatically for the first time, then manual reset curs, there is no impact to normal chiller operation. Reset is auto-
will be required thereafter. matic when all alerts are cleared.
A208 (EWT or LWT Thermistor Failure) T501, T502, T503 (Current Sensor Board Failure A xx Cir-
This alarm indicates that cooler EWT is less than LWT by 3°F for cuit A)
one minute after a circuit is started. When this alarm occurs, T505, T506, T507 (Current Sensor Board Failure B xx Cir-
chiller will shut down; the cooler pump will shut off if control en- cuit B)
abled. Manual reset will be required for this alarm. Alert codes T501-T503 are for compressors A1-A3, respectively,
T300 (Cooler Pump 1 Scheduled Maintenance Due) and T505-T507 are for compressors B1-B3, respectively. These
This alert indicates that Pump 1 Service Countdown (P.1.DN) ex- alerts occur when the output of the CSB is a constant high value.
pired. Complete Pump 1 maintenance and enter “YES” for Pump These alerts reset automatically. If the problem cannot be re-
1 Maintenance Done (P.1.MN) item to clear the alert. Reset is au- solved, the CSB must be replaced.
tomatic when all alerts are cleared. T950 (Loss of Communication with Water System Manager)
T301 (Cooler Pump 2 Scheduled Maintenance Due) This alert indicates that no communications have been received by
This alert indicates that Pump 2 Service Countdown (P.2.DN) ex- the MBB within 5 minutes of last transmission. When this alert
pired. Complete Pump 2 maintenance and enter “YES” for Pump occurs, WSM forces will be removed and chiller will run under its
2 Maintenance Done (P.2.MN) item to clear the alert. Reset is au- own control. Reset is automatic when all alerts are cleared.
tomatic when all alerts are cleared. A951 (Loss of Communication with Chillervisor System
T302 (Strainer Blowdown Scheduled Maintenance Due) Manager)
This alert indicates that Strainer Service Countdown (S.T.DN) ex- This alarm indicates that no communications have been received
pired. Complete the strainer blowdown maintenance and enter by the MBB within 5 minutes of last transmission. When this
alarm occurs, CSM forces will be removed and chiller will run un-
der its own control. Reset is automatic when all alarms are cleared.

98
 APPENDIX A — DISPLAY TABLES

Run Status Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAYa ITEM DESCRIPTION COMMENT

AUTO VIEW OF RUN STATUS
EWT XXX.X°F Entering Fluid Temp
LWT XXX.X°F Leaving Fluid Temp
SETP XXX.X°F Internal Active Setpoint
CTPT XXX.X°F Control Point
LOD.F XXX Load/Unload Factor
0=Service Test
1=Off Local
2=Off CCN
3=Off Time
STAT Control Mode 4=Off Emrgcy
5=On Local
6=On CCN
7=On Time
8=Ht Enabled
9=Pump Delay
VIEW
LD.PM Lead Pump
OCC YES/NO Occupied
LS.AC YES/NO Low Sound Active
MODE YES/NO Override Modes in Effect
CAP XXX Percent Total Capacity
STGE X Requested Stage
ALRM XXX Current Alarms & Alerts
TIME XX.XX Time of Day 00:00-23:59

MNTH XX Month of Year 1 - 12 (1 = January,

2 = February, etc.)
DATE XX Day of Month 01-31
YEAR XX Year of Century
C. TON XXX.X TONS Total Available Capacity
UNIT RUN HOUR AND START
HRS.U XXXX HRS Machine Operating Hours
RUN STR.U XXXX Machine Starts
HR.P1 XXXX HRS Pump 1 Run Hours
HR.P2 XXXX HRS Pump 2 Run Hours
CIRC AND COMP RUN HOURS
HRS.A XXXX HRS Circuit A Run Hours
HRS.B XXXX HRS Circuit B Run Hours See Note
HR.A1 XXXX HRS Compressor A1 Run Hours
HOUR HR.A2 XXXX HRS Compressor A2 Run Hours
HR.A3 XXXX HRS Compressor A3 Run Hours
HR.B1 XXXX HRS Compressor B1 Run Hours See Note
HR.B2 XXXX HRS Compressor B2 Run Hours See Note
HR.B3 XXXX HRS Compressor B3 Run Hours See Note
COMPRESSOR STARTS
ST.A1 XXXX Compressor A1 Starts
ST.A2 XXXX Compressor A2 Starts
STRT ST.A3 XXXX Compressor A3 Starts
ST.B1 XXXX Compressor B1 Starts See Note
ST.B2 XXXX Compressor B2 Starts See Note
ST.B3 XXXX Compressor B3 Starts See Note
NOTE(S):
a. If the unit has a single circuit, the Circuit B items will not appear in the display.

99
 APPENDIX A — DISPLAY TABLES (CONT)
Run Status Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAYa ITEM DESCRIPTION COMMENT

PREVENTIVE MAINTENANCE
PUMP PUMP MAINTENANCE
SI.PM XXXX HRS Pump Service Interval Default: 8760
P.1.DN XXXX HRS Pump 1 Service Countdown
P.2.DN XXXX HRS Pump 2 Service Countdown
P.1.MN YES/NO Pump 1 Maintenance Done User Entry
P.2.MN YES/NO Pump 2 Maintenance Done User Entry
PMDT PUMP MAINTENANCE DATES
P.1.M0 MM/DD/YY HH:MM
P.1.M1 MM/DD/YY HH:MM
P.1.M2 MM/DD/YY HH:MM
P.1.M3 MM/DD/YY HH:MM
P.1.M4 MM/DD/YY HH:MM
P.2.M0 MM/DD/YY HH:MM
P.2.M1 MM/DD/YY HH:MM
P.2.M2 MM/DD/YY HH:MM
P.2.M3 MM/DD/YY HH:MM
P.2.M4 MM/DD/YY HH:MM
STRN STRAINER MAINTENANCE
PM
SI.ST XXXX HRS Strainer Srvc Interval Default: 8760
S.T.DN XXXX HRS Strainer Srvc Countdown
S.T.MN YES/NO Strainer Maint. Done User Entry
ST.DT STRAINER MAINTENANCE DATES
S.T.M0 MM/DD/YY HH:MM
S.T.M1 MM/DD/YY HH:MM
S.T.M2 MM/DD/YY HH:MM
S.T.M3 MM/DD/YY HH:MM
S.T.M4 MM/DD/YY HH:MM
COIL COIL MAINTENANCE
SI.CL XXXX HRS Coil Cleaning Srvc Int Default: 8760
C.L.DN XXXX HRS Coil Service Countdown
C.L.MN YES/NO Coil Cleaning Maint.Done User Entry
CL.DT COIL MAINTENANCE DATES
C.L.M0 MM/DD/YY HH:MM
C.L.M1 MM/DD/YY HH:MM
C.L.M2 MM/DD/YY HH:MM
C.L.M3 MM/DD/YY HH:MM
C.L.M4 MM/DD/YY HH:MM
SOFTWARE VERSION NUMBERS
MBB CESR131460-XX-XX XX-XX is version number
EXV CESR131172-XX-XX XX-XX is version number
AUX1 CESR131333-XX-XX XX-XX is version number
VERS
EMM CESR131174-XX-XX XX-XX is version number
MARQ CESR131171-XX-XX XX-XX is version number
NAVI CESR130227-XX-XX XX-XX is version number
CXB CESR131173-XX-XX XX-XX is version number
NOTE(S):
a. If the unit has a single circuit, the Circuit B items will not appear in the display.

100
 APPENDIX A — DISPLAY TABLES (CONT)
Service Test Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTIONa COMMENTb

To enable Service Test mode, move
Enable/Off/Remote Control switch to
TEST Service Test Mode
OFF. Change TEST to ON.
Move switch to ENABLE
OUTPUTS
EXV.A XXX% EXV% Open
EXV.B XXX% EXV% Open
Size 010-030: Fan 1
Size 035-060: Fan 3
FAN1 ON/OFF Fan 1 Relay Size 070-090: Fan 5
Size 100-115: Fan 7
Size 130-150: Fan 9
Size 018-030: Fan 2
FAN2 ON/OFF Fan 2 Relay Size 035-060: Fans 1, 2
Size 070-150: Fan 1
Size 055, 060: Fan 4
FAN3 ON/OFF Fan 3 Relay Size 070-090: Fan 6
Size 100-150: Fans 2, 4
FAN4 ON/OFF Fan 4 Relay Size 070-150: Fan 3
Size 070-090: Fan 2
FAN5 ON/OFF Fan 5 Relay Size 100-115: Fan 5
Size 130-150: Fan 7
OUTS
Size 080-090: Fan 4
Size 100: Fan 8
FAN6 ON/OFF Fan 6 Relay Size 115: Fans 6, 8
Size 130-150: Fans 8, 10
FAN7 ON/OFF Fan 7 Relay Size130-150: Fan 5
FAN8 ON/OFF Fan 8 Relay Size 150: Fan 6
V.HPA XXX% Var Head Press% Circuit A
V.HPB XXX% Var Head Press% Circuit B
CLP.1 ON/OFF Cooler Pump Relay 1
CLP.2 ON/OFF Cooler Pump Relay 2
DIG.P XXX% Compressor A1 Load Percent Digital Scroll option only
CL.HT ON/OFF Cooler/Pump Heater
CCH.A ON/OFF Crankcase Heater Circuit A
CCH.B ON/OFF Crankcase Heater Circuit B
RMT.A ON/OFF Remote Alarm Relay
CIRCUIT A COMPRESSOR TEST
CC.A1 ON/OFF Compressor A1 Relay
DIG.P XXX% Compressor A1 Load Percent Digital Scroll option only
CMPA
CC.A2 ON/OFF Compressor A2 Relay
CC.A3 ON/OFF Compressor A3 Relay
MLV ON/OFF Minimum Load Valve Relay
CIRCUIT B COMPRESSOR TEST
CC.B1 ON/OFF Compressor B1 Relay See Note
CMPB
CC.B2 ON/OFF Compressor B2 Relay See Note
CC.B3 ON/OFF Compressor B3 Relay See Note
NOTE(S):
a. If the unit has a single circuit, the Circuit B items will not appear in the display.
b. Refer to Fig. 30 on page 35 for condenser fan layout.

101
 APPENDIX A — DISPLAY TABLES (CONT)
Temperature Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAYa ITEM DESCRIPTION COMMENT

ENTERING AND LEAVING UNIT TEMPERATURES
CEWT XXX.X°F Cooler Entering Fluid
CLWT XXX.X°F Cooler Leaving Fluid
UNIT
OAT XXX.X°F Outside Air Temperature
SPT XXX.X°F Space Temperature
DLWT XXX.X°F Lead/Lag Leaving Fluid
TEMPERATURES CIRCUIT A
SCT.A XXX.X°F Saturated Condensing Tmp
SST.A XXX.X°F Saturated Suction Temp
CIR.A
RGT.A XXX.X°F Compr Return Gas Temp
D.GAS XXX.X°F Discharge Gas Temp Digital Scroll option only
SH.A XXX.X ΔF Suction Superheat Temp
TEMPERATURES CIRCUIT B
SCT.B XXX.X°F Saturated Condensing Tmp See Note
CIR.B SST.B XXX.X°F Saturated Suction Temp See Note
RGT.B XXX.X°F Compr Return Gas Temp See Note
SH.B XXX.X ΔF Suction Superheat Temp See Note
NOTE(S):
a. If the unit has a single circuit, the Circuit B items will not appear in the display.

Pressures Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAYa ITEM DESCRIPTION COMMENT

PRESSURES CIRCUIT A
PRC.A DP.A XXX.X PSIG Discharge Pressure
SP.A XXX.X PSIG Suction Pressure
PRESSURES CIRCUIT B
PRC.B DP.B XXX.X PSIG Discharge Pressure See Note
SP.B XXX.X PSIG Suction Pressure See Note
NOTE(S):
a. If the unit has a single circuit, the Circuit B items will not appear in the display.

Set Points Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION RANGE COMMENT

COOLING SET POINTS
CSP.1 XXX.X°F Cooling Set Point 1 –20 to 70 Default: 44°F
COOL CSP.2 XXX.X°F Cooling Set Point 2 –20 to 70 Default: 44°F
CSP.3 XXX.X°F ICE Set Point –20 to 32 Default: 32°F
OAT.L XXX.X°F OAT Lockout Temp –20 to 120 Default: –20°F
HEAD PRESSURE SET POINTS
H.DP XXX.X°F Head Set Point 85 to 120 Default: 95°F
F.ON XXX.X°F Fan On Set Point Read Only Default: 95°F
HEAD
F.OFF XXX.X°F Fan Off Set Point Read Only Default: 72°F
B.OFF XX.X°F Base Fan Off Delta Temp 10 to 50 Default: 23°F
F.DLT XX.X ΔF Fan Stage Delta 0 to 50 Default: 15°F
BRINE FREEZE SET POINT
FRZ
BR.FZ XX.X°F Brine Freeze Point –20 to 34 Default: 34°F

102
 APPENDIX A — DISPLAY TABLES (CONT)
Inputs Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAYa ITEM DESCRIPTION COMMENT

GENERAL INPUTS
STST STRT/STOP Start/Stop Switch
FLOW ON/OFF Cooler Flow Switch
PM.F.1 ON/OFF Cooler Pump 1 Interlock
PM.F.2 ON/OFF Cooler Pump 2 Interlock
GEN.I
HT.RQ ON/OFF Heat Request
DLS1 ON/OFF Demand Limit Switch 1
DLS2 ON/OFF Demand Limit Switch 2
ICED ON/OFF Ice Done
DUAL ON/OFF Dual Set Point Switch
CIRCUIT INPUTS
FKA1 ON/OFF Compressor A1 Feedback
FKA2 ON/OFF Compressor A2 Feedback
CRCT FKA3 ON/OFF Compressor A3 Feedback
FKB1 ON/OFF Compressor B1 Feedback See Note
FKB2 ON/OFF Compressor B2 Feedback See Note
FKB3 ON/OFF Compressor B3 Feedback See Note
4-20 MA INPUTS
DMND XX.X mA 4-20 mA Demand Signal
4-20
RSET XX.X mA 4-20 mA Reset Signal
CSP XX.X mA 4-20 mA Cooling Set Point
NOTE(S):
a. If the unit has a single circuit, the Circuit B items will not appear in the display.

103
 APPENDIX A — DISPLAY TABLES (CONT)
Outputs Mode and Sub-Mode Directory
SUB-MODE ITEM DISPLAYa ITEM DESCRIPTION COMMENT
GENERAL OUTPUTS
FAN1 ON/OFF Fan 1 Relay
FAN2 ON/OFF Fan 2 Relay
FAN3 ON/OFF Fan 3 Relay
FAN4 ON/OFF Fan 4 Relay
FAN5 ON/OFF Fan 5 Relay
FAN6 ON/OFF Fan 6 Relay
GEN.O FAN7 ON/OFF Fan 7 Relay
FAN8 ON/OFF Fan 8 Relay
V.HPA XXX.X% Fan Speed Circuit A
V.HPB XXX.X% Fan Speed Circuit B See Note
C.WP1 ON/OFF Cooler Pump Relay 1
C.WP2 ON/OFF Cooler Pump Relay 2
CLHT ON/OFF Cooler/Pump Heater
MLV.R ON/OFF Minimum Load Valve Relay
OUTPUTS CIRCUIT A EXV
EXV.A XXX.X% EXV% Open
APPR XX.X ΔF Circuit A Approach
AP.SP XX.X ΔF Approach Setpoint
X.SH.R XX.X ΔF SH Reset at Max Unl-Dig
S.SH.R XXX.X% Digload to Start SH RST
A.EXV SH_R XX.X ΔF Amount of SH Reset
OVR.A XX EXVA Override
SPH.A XX.X ΔF Suction Superheat Temp
ASH.S XX.X ΔF Active Superheat Setpt
AMP.S XX.X ΔF Active Mop Setpt
PLM.A XXX.X% Cir A EXV Position Limit
SPR.1 XXX.X°F Spare 1 Temperature
OUTPUTS CIRCUIT A EXV
EXV.B XXX.X% EXV% Open
APPR XX.X ΔF Circuit B Approach
AP.SP XX.X ΔF Approach Setpoint
OVR.B XX EXVB Override
B.EXV
SPH.B XX.X ΔF Suction Superheat Temp
ASH.S XX.X ΔF Active Superheat Setpt
AMP.S XX.X ΔF Active Mop Setpt
PLM.B XXX.X% Cir B EXV Position Limit
SPR.2 XXX.X°F Spare 2 Temperature
OUTPUTS CIRCUIT A
CC.A1 ON/OFF Compressor A1 Relay
DPE.R XXX.X% Comp A1 Load Percent
CIR.A
CC.A2 ON/OFF Compressor A2 Relay
CC.A3 ON/OFF Compressor A3 Relay
CCH.A ON/OFF Crankcase Heater Circ A
OUTPUTS CIRCUIT B
CC.B1 ON/OFF Compressor B1 Relay See Note
CIR.B CC.B2 ON/OFF Compressor B2 Relay See Note
CC.B3 ON/OFF Compressor B3 Relay See Note
CCH.B ON/OFF Crankcase Heater Circ B See Note
NOTE(S):
a. If the unit has a single circuit, the Circuit B items will not appear in the display.

104
 APPENDIX A — DISPLAY TABLES (CONT)
Configuration Mode and Sub-Mode Directory
SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT
DISPLAY CONFIGURATION
TEST ON/OFF Test Display LEDs
METR ON/OFF Metric Display Off = English On = Metric
Default: 0
DISP 0 = English
LANG X Language Selection 1 = Espanol
2 = Francais
3 = Portuguese
PAS.E ENBL/DSBL Password Enable Default: Enable
PASS XXXX Service Password Default: 1111
UNIT CONFIGURATION
SIZE Unit Size
SZA.1 XX TONS Compressor A1 Size
SZA.2 XX TONS Compressor A2 Size
SZA.3 XX TONS Compressor A3 Size Automatically configured depen-
SZB.1 XX TONS Compressor B1 Size dent on unit size.
SZB.2 XX TONS Compressor B2 Size
SZB.3 XX TONS Compressor B3 Size
SH.SP XX.X ΔF Suction Superheat Setpt Default: 9°F
FAN.S XX Number of Fans Dependent on Unit Size
UNIT EXV YES/NO EXV Module Installed Default: Yes
A1.TY YES/NO Compressor A1 Digital Default: No
Default: 7
MAX.T XX SEC Maximum A1 Unload Time Max = 12 (010,015)
Max = 10 (011,016-150)
YES, if unit produced on or after
FN.SQ YES/NO CONDFAN SEQ for SSN 2214 2214 (WWYY)
NO, if unit produced before 2214
(WWYY)
Unit Nameplate Voltage
VLTS XXX Unit Voltage 60 Hz - 208, 230, 380, 460, 575
50 Hz - 400
Low Sound Fan = 8
F.POL X Num Poles in Fan Metal Fan = 6
UNIT OPTIONS 1 HARDWARE
FLUD X Cooler Fluid Default: Water
1 = Water
2 = Medium Temperature Brine
MLV.S YES/NO Minimum Load Valve Select Default: No
CSB.E ENBL/DSBL CSB Boards Enable Default: Enable
CPC ON/OFF Cooler Pump Control Default: Off
PM1E YES/NO Cooler Pump 1 Enable
PM2E YES/NO Cooler Pump 2 Enable
PM.P.S YES/NO Cooler Pmp Periodic Strt Default: No
PM.SL X Cooler Pump Select Default: Automatic
0 = Automatic
1 = Pump 1 Starts first
2 = Pump 2 Starts first
PM.DY XX MIN Cooler Pump Shutdown Dly 0 to 10 minutes, Default: 1 min.
PM.DT XXXX HRS Pump Changeover Hours Default: 500 hours
OPT1
ROT.P YES/NO Rotate Cooler Pumps Now User Entry
Default: 0
PMP.O X Cooler Pump Operation 0 = Auto
1 = Continuous
PM.HT XX.X°F Pump High Temp Cut Off Default: 95°F
Range: 95 - 125°F
EMM is automatically configured
EMM YES/NO EMM Module Installed to Yes when an option requiring
the EMM is configured.
CND.T X Cnd HX Typ:0=RTPF 1=MCHX
MOPS XX.X°F EXV MOP Set Point Default: 50°F
Range: 40 - 80°F
Default: 9.0°F
APPR XX.X°F Config Approach Set Point
Range: 5 - 40°F
Default: 1
EXV.T X EXV Type 1 = Standard
0 = Optional (not supported)

105
 APPENDIX A — DISPLAY TABLES (CONT)
Configuration Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

UNIT OPTIONS 2 CONTROLS
Default: 0
CTRL X Control Method 0 = Enable/Off/Remote Switch
2 = Occupancy
3 = CCN Control
Default: 1
LOAD X Loading Sequence Select 1 = Equal
2 = Staged
Default: 1
1 = Automatic
LLCS X Lead/Lag Circuit Select 2 = Circuit A Leads
3 = Circuit B Leads
Default: 60°F
LCWT XX.X ΔF High LCW Alert Limit
Range: 2 to 60°F

DELY XX Minutes Off Time Default: 0 Minutes

OPT2 Range: 0 to 15 Minutes
ICE.M ENBL/DSBL Ice Mode Enable Default: Disable
LS.MD X Low Sound Mode Select Default: 0
0 = Mode Disable
1 = Fan Noise Only
2 = Fan/Compressor Noise
LS.ST 00:00 Low Sound Start Time Default: 00:00
LS.ND 00:00 Low Sound End Time Default: 00:00
Default: 100%
LS.LT XXX% Low Sound Capacity Limit
Range: 0 to 100%
0 = ALTS & ALRMS
ALR.C X Alarm Relay Usage 1 = Alarms Only
2 = OFF
SER.T ENBL/DSBL Service Trio Enable
CCN NETWORK CONFIGS

CCNA XXX CCN Address Default: 1

Range: 0 to 239
Default: 0
CCNB XXX CCN Bus Number Range: 0 to 239
CCN
Default: 3
1 = 2400
BAUD X CCN Baud Rate 2 = 4800
3 = 9600
4 =19,200
5 =38,400

106
 APPENDIX A — DISPLAY TABLES (CONT)
Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT
CIR A EXV CONFIGURATION
Default: 25%
EXV.L XX% EXV Opening at Low LWT Range: 0 to 50%
Default: 10°F
LWT.L XX°F LWT for EXV Min Opening Range: –20 to 40°F
Default: 50%
EXV.H XX% EXV Opening at High LWT Range: 0 to 70%
Default: 35°F
LWT.H XX°F LWT for EXV Max Opening Range: 20 to 70°F
XXX.X% EXV CIRC.A Min Position Default: 2
MIN.A Range: 0 to 100
Default:a
RNG.A XXXXX STEP EXVA Steps in Range Range: 0 to 65535
XXXXX EXVA Steps Per Second Default: 150
SPD.A Range: 0 to 65535
X.XX% EXVA Fail Position In% Default: 0
POF.A Range: 0 to 100
Default: 0
MIN.A XXXXX STEP EXVA Minimum Steps Range: 0 to 65535
XXXXX STEP EXVA Maximum Steps Default:a
MAX.A Range: 0 to 65535
XXX.X% EXVA Overrun Steps Default: 167
OVR.A Range: 0 to 65535
EXV.A XXX.X% EXV CIRC.A Start Position
A.ST.P

X EXVA Stepper Type Default: 1

TYP.A 0 = UNIPOLAR, 1 = BIPOLAR
XXX.X°F High SCT Threshold Default: 115
H.SCT Range: 50 to 140
Default: 10
X.PCT XX.X% Open EXV X% on 2nd COMP Range: 0 to 30
XX.X% Move EXV X% on DISCRSOL Default: 5
X.PER Range: 0 to 30
XXX.X% Pre-Open EXV - Fan Adding Default: 10
A.PCT Range: 0 to 100
Default: 10
M.PCT XXX.X% Pre-Close EXV - Fan Sub Range: 0 to 100
XXX SEC Pre-Close EXV - Lag Shut Default: 10
S.PCT Range: 0 to 100
Default: 10
DELY XXX SEC Lag Start Delay Range: 0 to 100
Default: 6
L.DL.T XXX SEC Low SH Delta T - EXV Move Range: 0 to 240
XX.X F EXV Rate Threshold Default: 0.2F
SHR.T Range: –1.0 to 1.0F
Default: 1.0%
L.EX.M X.X% Low SH Override EXV Move Range: 0.4 to 3.0%
CIR B EXV CONFIGURATION
Default: 2%
MIN.B XXX.X% EXV Circ.B Min Position Range:0 to 100
Default:a
RNG.B XXXXX STEP EXVB Steps in Range Range: 0 to 65535
Default: 150
SPD.B XXXXX EXVB Steps Per Second Range: 0 to 65535
Default: 0
POF.B XXX.X% EXVB Fail Position in % Range: 0 to 100
EXV.B
Default: 0
MIN.B XXXXX STEP EXVB Minimum Steps Range: 0 to 65535
Default:a
MAX.B XXXXX STEP EXVB Maximum Steps Range: 0 to 65535
Default: 167
OVR.B XXX STEP EXVB Overrun Steps Range: 0 to 65535
Default: 1
TYP.B X EXVB Stepper Type 0 = UNIPOLAR, 1 = BIPOLAR

NOTE(S):
a. Sizes 010-020 and 035-045, default is 1596. Sizes 025,030, 050-060, default is 2500. Sizes 070-100 A circuit, default is 2785, and 100 B circuit - 150, default is 3690.

107
 APPENDIX A — DISPLAY TABLES (CONT)
Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT
MOTORMASTER
Default: 0
MMR.S X Motormaster Select 0 = NONE
1 = LOW AMBIENT
2 = GREENSPEED
Default: 1
P.GAN XX.X Head Pressure P Gain Range: 1 to 4
MM
Default: 0.1
I.GAN XX.X Head Pressure I Gain Range: -20 to 20
Default: 0.0
D.GAN XX.X Head Pressure D Gain GREENSPEED = 1.0
Range: -20 to 20
Default: 5.0
MIN.S XXX.X% Minimum Fan Speed Range: 0 to 100
RESET COOL TEMP
Default: 0
0 = No Reset
1 = 4 to 20 mA Input
CRST X Cooling Reset Type
2 = Outdoor Air Temperature
3 = Return Fluid
4 = Space Temperature

MA.DG XX.XΔF 4-20 - Degrees Reset Default: 0.0 ΔF

Range: -30 to 30 ΔF

RM.NO XXX.X°F Remote - No Reset Temp Default: 125°F

Range: 0 to 125°F

RM.F XXX.X°F Remote - Full Reset Temp Default: 0°F

Range: 0 to125°F

RM.DG XX.X ΔF Remote - Degrees Reset Default: 0.0 ΔF

Range: -30 to 30 ΔF

RT.NO XXX.XΔF Return - No Reset Temp Default: 10.0 ΔF

Range: 0 to 125°F

RT.F XXX.XΔF Return - Full Reset Temp Default: 10.0 ΔF

Range: 0 to 125°F

RT.DG XX.X ΔF Return - Degrees Reset Default: 0.0 ΔF

Range: -30 to 30 ΔF
Default: 0
0 = None
DMDC X Demand Limit Select 1 = Switch
2 - 4 to 20 mA Input
3 = CCN Loadshed
RSET Default: 100%
DM20 XXX% Demand Limit at 20 mA Range: 0 to 100%
Default: 0
SHNM XXX Loadshed Group Number Range: 0 to 99
Default: 0%
SHDL XXX% Loadshed Demand Delta
Range: 0 to 60%
Default: 60 minutes
SHTM XXX MIN Maximum Loadshed Time
Range: 0 to 120 minutes
Default: 80%
DLS1 XXX.X% Demand Limit Switch 1
Range: 0 to 100%
Default: 50%
DLS2 XXX.X% Demand Limit Switch 2
Range: 0 to 100%
LLEN ENBL/DSBL Lead/Lag Chiller Enable Default: Disable
MSSL SLVE/MAST Master/Slave Select Default: Master

SLVA XXX Slave Address Default: 0

Range: 0 to 239
Default: Master Leads
0 = Master Leads
LLBL X Lead/Lag Balance Select 1 = Slave Leads
2 = Automatic
Default: 168 hours
LLBD XXX HRS Lead/Lag Balance Delta Range: 40 to 400 hours
Default: 5 minutes
LLDY XXX MIN Lag Start Delay Range: 0 to 30 minutes
Default: Yes (cannot be
PARA YES Parallel Configuration changed)

108
 APPENDIX A — DISPLAY TABLES (CONT)
Configuration Mode and Sub-Mode Directory (cont)
SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT
SETPOINT AND RAMP LOAD
Default: 0
0 = Single
CLSP X Cooling Set Point Select 1 = Dual Switch
2 = Dual CCN Occupied
3 = 4 to 20 mA Input (requires EMM)
SLCT RL.S ENBL/DSBL Ramp Load Select Default: Enable
Default: 1.0
CRMP X.X°F Cooling Ramp Loading Range: 0.2 to 2
Default: 1
SCHD XX Schedule Number Range: 1 to 99
Default: 1
Z.GN X.X Deadband Multiplier Range: 1 to 4
SERVICE CONFIGURATION
EN.A1 ENBL/DSBL Enable Compressor A1
EN.A2 ENBL/DSBL Enable Compressor A2
EN.A3 ENBL/DSBL Enable Compressor A3
SERV
EN.B1 ENBL/DSBL Enable Compressor B1
EN.B2 ENBL/DSBL Enable Compressor B2
EN.B3 ENBL/DSBL Enable Compressor B3
REV.R ENBL/DSBL Reverse Rotation Enable Default: Enabled
BROADCAST CONFIGURATION
T.D.BC ON/OFF CCN Time/Date Broadcast Default: Off
BCST OAT.B ON/OFF CCN OAT Broadcast Default: Off
G.S.BC ON/OFF Global Schedule Broadcst Default: Off
BC.AK ON/OFF CCN Broadcast Ack’er Default: Off

109
 APPENDIX A — DISPLAY TABLES (CONT)
Time Clock Mode and Sub-Mode Directory
SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT
TIME OF DAY
TIME
HH.MM XX.XX Hour and Minute Military (00:00 - 23:59)
MONTH, DATE, DAY, AND YEAR
1 - 12 (1 = January,
MNTH XX Month of Year
2 = February, etc.)
DATE DOM XX Day of Month Range: 01 -31
DAY X Day of Week 1 - 7 (1 = Monday,
2 = Tuesday, etc.)
YEAR XXXX Year of Century
DAYLIGHT SAVINGS TIME
STR.M XX Month Default: 4 Range 1- 12
STR.W X Week Default: 1 Range 1- 5
STR.D X Day Default: 7 Range 1- 7
DST MIN.A XX Minutes to Add Default: 60 Range 0 - 99
STP.M XX Month Default: 10 Range 1- 12
STP.W XX Week Default: 5 Range 1- 5
STP.D XX Day Default: 7 Range 1- 7
MIN.S XX Minutes to Subtract Default: 60 Range 0 - 99
HOL.L LOCAL HOLIDAY SCHEDULES
HOLIDAY SCHEDULE 01
MON XX Holiday Start Month
HD.01
DAY XX Start Day
LEN XX Duration (days)
HOLIDAY SCHEDULE 02
1 - 12 (1 = January,
MON XX Holiday Start Month
HD.02 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 03

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.03 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 04
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.04
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 05
1 - 12 (1 = January,
MON XX Holiday Start Month
HD.05 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 06
MON XX Holiday Start Month 1 - 12 (1 = January,
HD.06 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 07
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.07
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 08
1 - 12 (1 = January,
MON XX Holiday Start Month
HD.08 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)

110
 APPENDIX A — DISPLAY TABLES (CONT)
Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

HOLIDAY SCHEDULE 09

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.09 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 10

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.10 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 11

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.11 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 12

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.12 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 13
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.13
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 14
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.14
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 15
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.15
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 16
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.16
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 17
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.17
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 18
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.18
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 19
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.19
DAY XX Start Day 01-31
LEN XX Duration (days)

111
 APPENDIX A — DISPLAY TABLES (CONT)
Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

HOLIDAY SCHEDULE 20

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.20 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 21

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.21 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 22

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.22 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 23

MON XX Holiday Start Month 1 - 12 (1 = January,

HD.23 2 = February, etc.)
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 24
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.24
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 25
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.25
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 26
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.26
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 27
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.27
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 28
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.28
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 29
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.29
DAY XX Start Day 01-31
LEN XX Duration (days)
HOLIDAY SCHEDULE 30
1 - 12 (1 = January,
MON XX Holiday Start Month 2 = February, etc.)
HD.30
DAY XX Start Day 01-31
LEN XX Duration (days)

112
 APPENDIX A — DISPLAY TABLES (CONT)
Time Clock Mode and Sub-Mode Directory (cont)
SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT
SCH.N 0 Schedule Number
SCH.L LOCAL OCCUPANCY SCHEDULE
OCCUPANCY PERIOD 1
OCC.1 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.1 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.1 YES/NO Monday In Period
TUE.1 YES/NO Tuesday In Period
PER.1 WED.1 YES/NO Wednesday In Period
THU.1 YES/NO Thursday In Period
FRI.1 YES/NO Friday In Period
SAT.1 YES/NO Saturday In Period
SUN.1 YES/NO Sunday In Period
HOL.1 YES/NO Holiday In Period
OCCUPANCY PERIOD 2
OCC.2 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.2 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.2 YES/NO Monday In Period
TUE.2 YES/NO Tuesday In Period
PER.2 WED.2 YES/NO Wednesday In Period
THU.2 YES/NO Thursday In Period
FRI.2 YES/NO Friday In Period
SAT.2 YES/NO Saturday In Period
SUN.2 YES/NO Sunday In Period
HOL.2 YES/NO Holiday In Period
OCCUPANCY PERIOD 3
OCC.3 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.3 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.3 YES/NO Monday In Period
TUE.3 YES/NO Tuesday In Period
PER.3 WED.3 YES/NO Wednesday In Period
THU.3 YES/NO Thursday In Period
FRI.3 YES/NO Friday In Period
SAT.3 YES/NO Saturday In Period
SUN.3 YES/NO Sunday In Period
HOL.3 YES/NO Holiday In Period
OCCUPANCY PERIOD 4
OCC.4 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.4 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.4 YES/NO Monday In Period
TUE.4 YES/NO Tuesday In Period
PER.4 WED.4 YES/NO Wednesday In Period
THU.4 YES/NO Thursday In Period
FRI.4 YES/NO Friday In Period
SAT.4 YES/NO Saturday In Period
SUN.4 YES/NO Sunday In Period
HOL.4 YES/NO Holiday In Period
OCCUPANCY PERIOD 5
OCC.5 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.5 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.5 YES/NO Monday In Period
TUE.5 YES/NO Tuesday In Period
PER.5 WED.5 YES/NO Wednesday In Period
THU.5 YES/NO Thursday In Period
FRI.5 YES/NO Friday In Period
SAT.5 YES/NO Saturday In Period
SUN.5 YES/NO Sunday In Period
HOL.5 YES/NO Holiday In Period

113
 APPENDIX A — DISPLAY TABLES (CONT)

Time Clock Mode and Sub-Mode Directory (cont)

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

OCCUPANCY PERIOD 6
OCC.6 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.6 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.6 YES/NO Monday In Period
TUE.6 YES/NO Tuesday In Period
PER.6 WED.6 YES/NO Wednesday In Period
THU.6 YES/NO Thursday In Period
FRI.6 YES/NO Friday In Period
SAT.6 YES/NO Saturday In Period
SUN.6 YES/NO Sunday In Period
HOL.6 YES/NO Holiday In Period
OCCUPANCY PERIOD 7
OCC.7 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.7 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.7 YES/NO Monday In Period
TUE.7 YES/NO Tuesday In Period
PER.7 WED.7 YES/NO Wednesday In Period
THU.7 YES/NO Thursday In Period
FRI.7 YES/NO Friday In Period
SAT.7 YES/NO Saturday In Period
SUN.7 YES/NO Sunday In Period
HOL.7 YES/NO Holiday In Period
OCCUPANCY PERIOD 8
OCC.8 XX:XX Period Occupied Time Military (00:00 - 23:59)
UNC.8 XX:XX Period Unoccupied Time Military (00:00 - 23:59)
MON.8 YES/NO Monday In Period
TUE.8 YES/NO Tuesday In Period
PER.8 WED.8 YES/NO Wednesday In Period
THU.8 YES/NO Thursday In Period
FRI.8 YES/NO Friday In Period
SAT.8 YES/NO Saturday In Period
SUN.8 YES/NO Sunday In Period
HOL.8 YES/NO Holiday In Period
SCHEDULE OVERRIDE
OVR.T X HRS Timed Override Hours Default: 0 Range 0-4 hours
OVR
OVR.L X HRS Override Time Limit Default: 0 Range 0-4 hours
T.OVR YES/NO Timed Override User Entry

114
 APPENDIX A — DISPLAY TABLES (CONT)
Operating Mode and Sub-Mode Directory
SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT
MODES CONTROLLING UNIT
MD01 ON/OFF CSM Controlling Chiller
MD02 ON/OFF WSM Controlling Chiller
MD03 ON/OFF Master/Slave Control
MD05 ON/OFF Ramp Load Limited
MD06 ON/OFF Timed Override in effect
MD07 ON/OFF Low Cooler Suction TempA
MD08 ON/OFF Low Cooler Suction TempB
MD09 ON/OFF Slow Change Override
MD10 ON/OFF Minimum OFF time active
MD13 ON/OFF Dual Set Point
MD14 ON/OFF Temperature Reset
MD15 ON/OFF Demand/Sound Limited
MODE
MD16 ON/OFF Cooler Freeze Protection
MD17 ON/OFF Low Temperature Cooling
MD18 ON/OFF High Temperature Cooling
MD19 ON/OFF Making Ice
MD20 ON/OFF Storing Ice
MD21 ON/OFF High SCT Circuit A
MD22 ON/OFF High SCT Circuit B
MD23 ON/OFF Minimum Comp. On Time
MD24 ON/OFF Pump Off Delay Time
MD25 ON/OFF Low Sound Mode
MDAO ON/OFF Circuit A Trio Oil MGMT
MDBO ON/OFF Circuit B Trio Oil MGMT
MD.OL ON/OFF OAT Lockout in effect

Alarms Mode and Sub-Mode Directory

SUB-MODE ITEM DISPLAY ITEM DESCRIPTION COMMENT

CURRENTLY ACTIVE ALARMS
CRNT AXXX
Alarms are shown as AXXX
TXXX Current Alarms 1-25
Alerts are shown as TXXX
PXXX
RCRN YES/NO Reset All Current Alarms
ALARM HISTORY
HIST AXXX Alarms are shown as AXXX
TXXX Alarm History 1-20
PXXX Alerts are shown as TXXX

115
 APPENDIX B — CCN TABLES
CCN DISPLAY TABLES — A_UNIT (General Unit Parameters)
DESCRIPTION VALUE UNITS POINT NAME FORCIBLE
Control Mode 0 = Test STAT N
1 = Local Off
2 = CCN Off
3 = Clock Off
4 = Emergency Stop
5 = Local On
6 = CCN On
7 = Clock On
8 = Heat Enabled
9 = Pump Delay
Occupied No/Yes OCC N
CCN Chiller Start/Stop CHIL_S_S Y
Low Sound Active No/Yes LSACTIVE N
Alarm State Normal/Alert/Alarm ALM N
Active Demand Limit 0 to 100 % DEM_LIM Y
Override Modes in Effect No/Yes MODE N
Percent Total Capacity 0 to 100 % CAP_T N
Requested Stage 0 to 99 STAGE N
Internal Active Set Point –20 to 70 F SP N
Control Point –20 to 70 F CTRL_PNT Y
Entering Fluid Temp snnn.n F EWT N
Leaving Fluid Temp snnn.n F LWT N
Emergency Stop Enable/Emstop Enable EMSTOP Y
Minutes Left for Start 00:00 to 15:00 minutes MIN_LEFT N
PUMPS
Cooler Pump Relay 1 Off/On COOLPMP1 N
Cooler Pump Relay 2 Off/On COOLPMP2 N
Cooler Pump 1 Interlock Open/Close PMP1_FBK N
Cooler Pump 2 Interlock Open/Close PMP2_FBK N
Cooler Flow Switch Open/Close COOLFLOW N
Lead Pump No Pump/Pump 1/Pump 2 LEADPUMP N
Rotate Cooler Pumps Now No/Yes ROT_PUMP Y
Heat/Cool Select Heat/Cool HC_SEL N
Total Available Capacity 0-200.0 Tons CALCTONS Y

CCN DISPLAY TABLES — CIRCA_AN (Circuit A Analog Parameters)

DESCRIPTION VALUE UNITS POINT NAME
CIRCUIT A ANALOG VALUES
Percent Total Capacity 0-100 % CAPA_T
Percent Available Cap. 0-100 % CAPA_A
Discharge Pressure nnn.n PSIG DP_A
Suction Pressure nnn.n PSIG SP_A
Head Setpoint nnn.n °F HSP
Saturated Condensing Tmp snnn.n F TMP_SCTA
Saturated Suction Temp snnn.n F TMP_SSTA
Average SST last 15 sec snnn.n F SSTA_AVG
Instantaneous SSTA snnn.n F TMPISSTA
EXV% Open nnn % EXV_A
Var Head Press Output A nnn.n milliamps VHPA_ACT
Compr Return Gas Temp nnn.n F TMP_RGTA
Discharge Gas Temp nnn.n °F DISGAS
Suction Superheat Temp nnn.n F SH_A
Spare 1 Temperature nnn.n °F SPR1_TMP

116
 APPENDIX B — CCN TABLES (CONT)
CCN DISPLAY TABLES — CIRCADIO (Circuit A Discrete Inputs/Outputs)
DESCRIPTION VALUE UNITS POINT NAME
CIRC. A DISCRETE OUTPUTS
Compressor A1 Relay Off K_A1_RLY
Comp A1 Unload Time 0 sec A1UNLTME
Compressor A2 Relay Off K_A2_RLY
Compressor A3 Relay Off K_A3_RLY
Minimum Load Valve Relay Off MLV_RLY
Crankcase Heater Circ A On CCHA
CIRC. A DISCRETE INPUTS
Compressor A1 Feedback Off K_A1_FBK
Compressor A2 Feedback Off K_A2_FBK
Compressor A3 Feedback Off K_A3_FBK

CCN DISPLAY TABLES — CIRCB_AN (Circuit B Analog Parameters)

DESCRIPTION VALUE UNITS POINT NAME FORCIBLE
CIRCUIT B ANALOG VALUES
Percent Total Capacity 0-100 % CAPB_T N
Percent Available Cap. 0-100 % CAPB_A N
Discharge Pressure nnn.n PSIG DP_B N
Suction Pressure nnn.n PSIG SP_B N
Head Setpoint nnn.n °F HSP N
Saturated Condensing Tmp snnn.n F TMP_SCTB N
Saturated Suction Temp snnn.n F TMP_SSTB N
EXV% Open nnn % EXV_B N
Var Head Press Output B nnn.n milliamps VHPB_ACT N
Compr Return Gas Temp nnn.n F TMP_RGTB N
Suction Superheat Temp nnn.n F SH_B N
Spare 2 Temperature nnn.n °F SPR2_TMP N

CCN DISPLAY TABLES — CIRCBDIO (Circuit B Discrete Inputs/Outputs)

DESCRIPTION VALUE UNITS POINT NAME
CIRC. B DISCRETE OUTPUTS
Compressor B1 Relay Off K_B1_RLY
Compressor B2 Relay Off K_B2_RLY
Compressor B3 Relay Off K_B3_RLY
Minimum Load Valve Relay Off MLV_RLY
Crankcase Heater Circ B On CCHB
CIRC. B DISCRETE INPUTS
Compressor B1 Feedback Off K_B1_FBK
Compressor B2 Feedback Off K_B2_FBK
Compressor B3 Feedback Off K_B3_FBK

117
 APPENDIX B — CCN TABLES (CONT)
CCN DISPLAY TABLES — OPTIONS (Unit Parameters)
DESCRIPTION VALUE UNITS POINT NAME
FANS
Fan 1 Relay Off FAN_1
Fan 2 Relay Off FAN_2
Fan 3 Relay Off FAN_3
Fan 4 Relay Off FAN_4
Fan 5 Relay Off FAN_5
Fan 6 Relay Off FAN_6
Fan 7 Relay Off FAN_7
Fan 8 Relay Off FAN_8
Cooler/Pump Heater Off COOL_HTR
UNIT ANALOG VALUES
Cooler Entering Fluid snnn.n F COOL_EWT
Cooler Leaving Fluid snnn.n F COOL_LWT
Average Entering Fluid snnn.n F EWTAVG
Average Leaving Fluid snnn.n F LWTAVG
Lowest LWT in 15 Seconds snnn.n F LWTLOW
Lead/Lag Leaving Fluid snnn.n F DUAL_LWT
TEMPERATURE RESET
4-20 mA Reset Signal nn.n mA RST_MA
Outside Air Temperature snnn.n F OAT
Space Temperature snnn.n F SPT
DEMAND LIMIT
4-20 mA Demand Signal nn.n mA LMT_MA
Demand Limit Switch 1 Off DMD_SW1
Demand Limit Switch 2 Off DMD_SW2
CCN Loadshed Signal 0 = Normal DL_STAT
1 = Redline
2 = Loadshed
MISCELLANEOUS
Heat Request On HEAT_REQ
Dual Setpoint Switch On DUAL_IN
Cooler LWT Setpoint snnn.n F LWT_SP
Ice Done Off ICE_DONE

CCN CONFIGURATION TABLES — UNIT (Unit Configuration)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
Unit Size nnn tons SIZE
Compressor A1 Size nnn tons SIZE_A1
Compressor A2 Size nnn tons SIZE_A2
Compressor A3 Size nnn Automatically configured tons SIZE_A3
Compressor B1 Size nnn dependent on unit size tons SIZE_B1
Compressor B2 Size nnn tons SIZE_B2
Compressor B3 Size nnn tons SIZE_B3
Suction Superheat Setpt nn.n 9.0 F SH_SP
Number of Fans n Dependent on unit size FAN_TYPE
Compressor A1 Digital? No/Yes No CPA1TYPE
Maximum A1 Unload Time nn 12 sec MAXULTME
Unit Produced On or After 2214? No/Yes Yes FAN_SEQ
Unit Voltage nnn Unit dependent 200, 230, volts UNITVOLT
380, 400, 460, 575
Num Poles in Fan Motor 8 8 FANPOLES

118
 APPENDIX B — CCN TABLES (CONT)
CCN CONFIGURATION TABLES — OPTIONS1 (Options 1 Configuration)
DESCRIPTION VALUE DEFAULT UNITS POINT NAME
Cooler Fluid 1 = Water, 2 = Med. Brine 1 FLUIDTYP
Minimum Load Vlv Select No/Yes No MLV_FLG
CSB Board Enable Dsable/Enable Enable CSB_ENA
Cooler Pump Control Off/On Off CPC
Cooler Pmp Continuous ON No/Yes No PUMPOPER
Pump High Temp Cut Off 95 to 125 95.0 °F PUMPHTCO
Cooler Pump 1 Enable No/Yes No PMP1_ENA
Cooler Pump 2 Enable No/Yes No PMP2_ENA
Cooler Pmp Periodic Strt No/Yes No PUMP_PST
Cooler Pump Select 0 = Automatic, 1 = Pump 1, 2 = Pump 2 0 PMP_SLCT
Cooler Pump Shutdown Dly 0 to 10 1 minutes PUMP_DLY
Pump Changeover Hours 10 to 2000 500 hours PMP_DLTA
EMM Module Installed No/Yesa No EMM_BRD
Cnd HX Typ: 0=RTPF 1=MCHX 0/1 1 COILTYPE
EXV MOP Set Point nn.n 50 °F MOP_SP
Config Approach Setpoint nn.n 9.0 °F IAPPROSP
EXV Type 0 = Optional, 1 = Standard 1 EXVTYPE
NOTE(S):
a. EMM is automatically configured to Yes when an option requiring the EMM is configured.

CCN CONFIGURATION TABLES — OPTIONS2 (Options 2 Configuration)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
Control Method 0 = Switch 0 CONTROL
2 = Occupancy
3 = CCN
Loading Sequence Select 1 = Equal Loading 1 SEQ_TYP
2 = Staged Loading
Lead/Lag Circuit Select 1 = Automatic 1 LEAD_TYP
2 = Circuit A Leads
3 = Circuit B Leads
Cooling Setpoint Select 0 = Single 0 CLSP_TYP
1 = Dual, remote switch controlled
2 = Dual CCN occupancy
3 = 4-20 mA input
Ramp Load Select Enable/Dsable Enable RAMP_EBL
Heat Cool Select Cool/Heat Cool HEATCOOL
High LCW Alert Limit 2 to 60 60.0 F LCW_LMT
Minutes off time 0 to 15 0 min DELAY
Deadband Multiplier 1.0 to 4.0 1.0 Z_GAIN
Ice Mode Enable Enable/Dsable Dsable ICE_CNFG
Low Sound Mode Select 0 = Disabled 0 LS_MODE
1 = Fan only
2 = Capacity/Fans
Low Sound Start Time 00:00 to 23:59 00:00 LS_START
Low Sound End Time 00:00 to 23:59 00:00 LS_END
Low Sound Capacity Limit 0 to 100 100 % LS_LIMIT
Alarm Relay Usage 0 = Alts & Alrms 0 ALRMCNFG
1 = Alarms Only
2 = Off
Service Trio Enable Enable/Dsable Dsable SER_TRIO

CCN CONFIGURATION TABLES — SCHEDOVR (Timed Override Setup)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
Schedule Number 0 to 99 1 SCHEDNUM
Override Time Limit 0 to 4 0 hours OTL
Timed Override Hours 0 to 4 0 hours OVR_EXT
Timed Override No/Yes No TIMEOVER

119
 APPENDIX B — CCN TABLES (CONT)
CCN CONFIGURATION TABLES — RESETCON (Temperature Reset and Demand Limit)
DESCRIPTION VALUE DEFAULT UNITS POINT NAME
COOLING RESET
Cooling Reset Type 0 = No Reset 0 CRST_TYP
1 = 4-20 mA input
2 = External temp – OAT
3 = Return Fluid
4 = External temp - SPT
4-20 MA RESET
4-20 – Degrees Reset –30 to 30 0.0 F 420_DEG
REMOTE RESET
Remote – No Reset Temp 0 to 125 125.0 F REM_NO
Remote – Full Reset Temp 0 to 125 0.0 F REM_FULL
Remote – Degrees Reset –30 to 30 0.0 F REM_DEG
RETURN TEMPERATURE RESET
Return – No Reset Temp 0 to 125 10.0 F RTN_NO
Return – Full Reset Temp 0 to 125 0.0 F RTN_FULL
Return – Degrees Reset –30 to 30 0.0 F RTN_DEG
DEMAND LIMIT
Demand Limit Select 0 = None 0 DMD_CTRL
1 = External switch input
2 = 4-20 mA input
3 = Loadshed
Demand Limit at 20 mA 0 to 100 100 % DMT20MA
Loadshed Group Number 0 to 99 0 SHED_NUM
Loadshed Demand Delta 0 to 60 0 % SHED_DEL
Maximum Loadshed Time 0 to 120 60 minutes SHED_TIM
Demand Limit Switch 1 0 to 100 80 % DLSWSP1
Demand Limit Switch 2 0 to 100 50 % DLSWSP2

CCN CONFIGURATION TABLES — DUALCHIL (Dual Chiller Configuration Settings)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
LEAD/LAG
Lead/Lag Chiller Enable Enable/Dsable Dsable LL_ENA
Master/Slave Select Master/Slave Master MS_SEL
Slave Address 0 to 239 2 SLV_ADDR
Lead/Lag Balance Select 0 = None 0 LL_BAL
Lead/Lag Balance Delta 40 to 400 168 hours LL_BAL_D
Lag Start Delay 0 to 30 5 minutes LL_DELAY
Parallel Configuration Yes Yes PARALLEL

CONFIGURATION DISPLAY TABLES

TABLE DISPLAY NAME RANGE DEFAULT UNITS POINT NAME

ALARMDEF/ Alarm Routing Control 0 or 1 for each position 00000000 ALRM_CNT
ALARMS01 Alarm Equipment Priority 0-7 4 EQP_TYP
Comm Failure Retry Time 1-240 10 min RETRY_TM
Realarm Time 1-255 30 min RE_ALARM
Alarm System Name 8 chars CHILLER ALRM_NAM
BRODEFS/ CCN Time/Date Broadcast Yes/No No CCNBC
BROCASTS CCN OAT Broadcast Yes/No No OATBC
Global Schedule Broadcast Yes/No No GSBC
CCN Broadcast Ack’er Yes/No No CCNBCACK
Daylight Savings Start:
Month 1 to 12 3 month STARTM
Week 1 to 5 2 week STARTW
Day 1 to 7 7 day STARTD
Minutes to Add 0 to 90 60 min MINADD
Daylight Savings Start:
Month 1 to 12 11 month STOPM
Week 1 to 5 1 week STOPW
Day 1 to 7 7 day STOPD
Minutes to Add 0 to 90 60 min MINSUB

120
 APPENDIX B — CCN TABLES (CONT)
CCN CONFIGURATION TABLES — DISPLAY (Marquee Display SETUP)
DESCRIPTION VALUE DEFAULT UNITS POINT NAME
Service Password nnnn 1111 PASSWORD
Password Enable Enable/Disable Enable PASS_EBL
Metric Display Off/On Off DISPUNIT
Language Selection 0 = ENGLISH 0 LANGUAGE
1 = FRANCAIS
2 = ESPANOL
3 = PORTUGUES

CCN CONFIGURATION TABLES — EXVACONF (EXV Circuit A Configuration)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
EXV Opening at Low LWT nnn.n 25 % EXV_Y1
LWT for EXV Min Opening nnn.n 10 F LWT_X1
EXV Opening at High LWT nnn.n 50 % EXV_Y2
LWT for EXV Max Opening nnn.n 35 F LWT_X2
EXV Circ. A Min Position nnn.n 2 % EXVAMINP
EXVA Steps in Range nnnnn 2500 steps EXVARANG
EXVA Steps Per Second nnnnn 150 EXVARATE
EXVA Fail Position In % nnnn.nn 0 % EXVAPOSF
EXVA Minimum Steps nnnnn 0 steps EXVAMINS
EXVA Maximum Steps nnnnn 2500 steps EXVAMAXS
EXVA Overrun Steps nnnnn 167 steps EXVAOVRS
EXVA Stepper Type nnn 1 EXVATYPE
High SCT Threshold nnn.n 115 F HIGH_SCT
Open EXV X% on 2nd comp nnn.n 10 % EXV_HSCT
Move EXV X% on DISCRSOL nnn.n 5 % EXVDISCR
Pre-Open EXV Fan Adding nnn.n 10 % EXV_AFAN
Pre-Close EXV Fan Sub nnn.n 10 % EXV_MFAN
Pre-Close EXV Lag shut nnn.n 10 % EXV_SLAG
Lag Start Delay nnn 10 sec DELAYLAG
SH Reset Maximum nnn.n 11 ^F MAXSHRST
Cap at SH Offset Maximum nnn.n 25 % SHRSTBGN
SH Rate Threshold nnn.n 0.2 ^F SHR_THR
Low SH DeltaT EXV Move nnn 60 sec LSH_DL_T
Low SH Override EXV Move nnn.n 1 % LSH_EXVM

CCN CONFIGURATION TABLES — EXVBCONF (EXV Circuit B Configuration)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
EXV Circ. B Min Position nnn.n 2 % EXVBMINP
EXVB Steps in Range nnnnn 2500 steps EVXBRANG
EXVB Steps Per Second nnnnn 150 EXVBRATE
EXVB Fail Position in % nnnn.nn 0 % EXVBPOSF
EXVB Minimum Steps nnnnn 0 steps EXVBMINS
EXVB Maximum Steps nnnnn 2500 steps EXVBMAXS
EXVB Overrun Steps nnnnn 167 steps EXVBOVRS
EXVB Stepper Type nnn 1 EXVBTYPE

CCN CONFIGURATION TABLES — MM_CONF (Motormaster Configuration)

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
Motormaster Select 0 = NONE 0 = NONE MM_SLCT
1 = LOW AMBIENT
2 = GREENSPEED
Head Pressure P Gain nnn.n 1.0 HP_PGAIN
Head Pressure I Gain nnn.n 0.1 HP_IGAIN
Head Pressure D Gain LOW AMBIENT 0.0 0.0 HP_DGAIN
GREENSPEED 1.0
Minimum Fan Speed nnn.n 5.0 % MIN_VHP

121
 APPENDIX B — CCN TABLES (CONT)
CCN SERVICE TABLES — SERVICE
DESCRIPTION VALUE DEFAULT UNITS POINT NAME
SERVICE
Brine Freeze Point nnn.n 34.0 F BRN_FRZ
Pump Service Interval nnnnn 876.0 hours SI_PUMPS
COMPRESSOR ENABLE
Enable Compressor A1 Disable/Enable Dependent on unit size ENABLEA1
Enable Compressor A2 Disable/Enable Dependent on unit size ENABLEA2
Enable Compressor A3 Disable/Enable Dependent on unit size ENABLEA3
Enable Compressor B1 Disable/Enable Dependent on unit size ENABLEB1
Enable Compressor B2 Disable/Enable Dependent on unit size ENABLEB2
Enable Compressor B3 Disable/Enable Dependent on unit size ENABLEB3
Reverse Rotation Enable Disable/Enable Enable REVR_VER

CCN SETPOINT TABLES — SETPOINT

DESCRIPTION VALUE DEFAULT UNITS POINT NAME
COOLING
Cooling Setpoint 1 14 to 70 44.0 F CSP1
Cooling Setpoint 2 14 to 70 44.0 F CSP2
ICE Setpoint 14 to 32 32.0 F CSP3
RAMP LOADING
Cooling Ramp Loading 0.2 to 2.0 1.0 CRAMP
Brine Freeze Point –20 to 34 34.0 F BRN_FRZ
Head Setpoint 85 to 120 95.0 F HSP
Fan On Set Point 95.0 F FANONSP
Fan Off Set Point 72.0 F FANOFFSP
Fan Stage Delta 0 to 50 15.0 F FSTGDLTA
Base Fan Off Delta Temp 10 to 50 23.0 F B_FANOFF
OAT Lockout Temp –28.9 to 48.9 –20 F OAT_LOCK

CCN MAINTENANCE TABLES — CIRA_EXV

DESCRIPTION VALUE UNITS POINT NAME
EXV % Open nnn % EXV_A
Circuit A Approach nnn.n delta F CIRA_APP
Approach Setpoint nnn.n delta F APPRA_SP
EXVA Override nnnnn EXVAOVRR
Suction Superheat Temp nnn.n delta F SH_A
Active Superheat Setpt nn.n delta F ACTSH_SP
Active MOP Setpt nn.n delta F ACMOP_SP
Cir A EXV Position Limit nnn % PLMA

CCN MAINTENANCE TABLES — CIRB_EXV

DESCRIPTION VALUE UNITS POINT NAME
EXV % Open nnn % EXV_B
Circuit B Approach nnn.n delta F CIRB_APP
Approach Setpoint nnn.n delta F APPRB_SP
EXVB Override nnnnn EXVBOVRR
Suction Superheat Temp nnn.n delta F SH_B
Active Superheat Setpt nn.n delta F ACTSH_SP
Active MOP Setpt nn.n delta F ACMOP_SP
Cir B EXV Position Limit nnn % PLMB

122
 APPENDIX B — CCN TABLES (CONT)
CCN MAINTENANCE TABLES — STRTHOUR
DESCRIPTION VALUE UNITS POINT NAME
Machine Operating Hours nnnnnn hours HR_MACH
Machine Starts nnnnnn CY_MACH
Circuit A Run Hours nnnnnn hours HR_CIRA
Compressor A1 Run Hours nnnnnn hours HR_A1
Compressor A2 Run Hours nnnnnn hours HR_A2
Compressor A3 Run Hours nnnnnn hours HR_A3
Circuit B Run Hours nnnnnn hours HR_CIRB
Compressor B1 Run Hours nnnnnn hours HR_B1
Compressor B2 Run Hours nnnnnn hours HR_B2
Compressor B3 Run Hours nnnnnn hours HR_B3
Circuit A Starts nnnnnn CY_CIRA
Compressor A1 Starts nnnnnn CY_A1
Compressor A2 Starts nnnnnn CY_A2
Compressor A3 Starts nnnnnn CY_A3
Circuit B Starts nnnnnn CY_CIRB
Compressor B1 Starts nnnnnn CY_B1
Compressor B2 Starts nnnnnn CY_B2
Compressor B3 Starts nnnnnn CY_B3
PUMP HOURS
Pump 1 Run Hours nnnnnn hours HR_PUMP1
Pump 2 Run Hours nnnnnn hours HR_PUMP2

CCN MAINTENANCE TABLES — CURRMODS

DESCRIPTION VALUE POINT NAME
CSM controlling Chiller On/Off MODE_1
WSM controlling Chiller On/Off MODE_2
Master/Slave control On/Off MODE_3
Ramp Load Limited On/Off MODE_5
Timed Override in effect On/Off MODE_6
Low Cooler Suction TempA On/Off MODE_7
Low Cooler Suction TempB On/Off MODE_8
Slow Change Override On/Off MODE_9
Minimum OFF time active On/Off MODE_10
Dual Setpoint On/Off MODE_13
Temperature Reset On/Off MODE_14
Demand/Sound Limited On/Off MODE_15
Cooler Freeze Protection On/Off MODE_16
Low Temperature Cooling On/Off MODE_17
High Temperature Cooling On/Off MODE_18
Making ICE On/Off MODE_19
Storing ICE On/Off MODE_20
High SCT Circuit A On/Off MODE_21
High SCT Circuit B On/Off MODE_22
Minimum Comp. On Time On/Off MODE_23
Pump Off Delay Time On/Off MODE_24
Low Sound Mode On/Off MODE_25
Circuit A Trio Oil Mgmt On/Off MD_A_OIL
Circuit B Trio Oil Mgmt On/Off MD_B_OIL
OAT Lockout in effect On/Off MD_OATL

123
 APPENDIX B — CCN TABLES (CONT)
CCN MAINTENANCE TABLES — VFD1
DESCRIPTION VALUE UNITS POINT NAME
Unit Voltage 460 Volts UNITVOLT
Num Poles in Fan Motor 8 FANPOLES
Fan Control Select 0 MM_SLCT
VFD1 Comm Fail Count 0 VF1CFAIL
Danfoss VFD Command 0 % VFD1CMD
Danfoss VFD Status Word 0 VFD1STAT
Danfoss VFD Voltage 0 Volts VFD1VLTS
Danfoss VFD Freq HZ 0 VFD1_HZ
Danfoss VFD Power 0 kW VFD1_PWR
Danfoss VFD Freq Percent 0 % VFD1_PCT
Danfoss VFD Speed RPM 0 VFD1_RPM

CCN MAINTENANCE TABLES — ALARMS

DESCRIPTION VALUE POINT NAME
Active Alarm #1 AXXX or TXXX ALARM01C
Active Alarm #2 AXXX or TXXX ALARM02C
Active Alarm #3 AXXX or TXXX ALARM03C
Active Alarm #4 AXXX or TXXX ALARM04C
Active Alarm #5 AXXX or TXXX ALARM05C
Active Alarm #6 AXXX or TXXX ALARM06C
Active Alarm #7 AXXX or TXXX ALARM07C
Active Alarm #8 AXXX or TXXX ALARM08C
Active Alarm #9 AXXX or TXXX ALARM09C
Active Alarm #10 AXXX or TXXX ALARM10C
Active Alarm #11 AXXX or TXXX ALARM11C
Active Alarm #12 AXXX or TXXX ALARM12C
Active Alarm #13 AXXX or TXXX ALARM13C
Active Alarm #14 AXXX or TXXX ALARM14C
Active Alarm #15 AXXX or TXXX ALARM15C
Active Alarm #16 AXXX or TXXX ALARM16C
Active Alarm #17 AXXX or TXXX ALARM17C
Active Alarm #18 AXXX or TXXX ALARM18C
Active Alarm #19 AXXX or TXXX ALARM19C
Active Alarm #20 AXXX or TXXX ALARM20C
Active Alarm #21 AXXX or TXXX ALARM21C
Active Alarm #22 AXXX or TXXX ALARM22C
Active Alarm #23 AXXX or TXXX ALARM23C
Active Alarm #24 AXXX or TXXX ALARM24C
Active Alarm #25 AXXX or TXXX ALARM25C

CCN MAINTENANCE TABLES — VERSIONS

DESCRIPTION VERSION VALUE
EXV CESR131172- nn-nn
AUX CESR131333- nn-nn
MBB CESR131460- nn-nn
EMM CESR131174- nn-nn
MARQUEE CESR131171- nn-nn
NAVIGATOR CESR130227- nn-nn
CXB CESR131173- nn_nn

124
 APPENDIX B — CCN TABLES (CONT)
CCN MAINTENANCE TABLES — LOADFACT
DESCRIPTION VALUE UNITS POINT NAME
CAPACITY CONTROL
Load/Unload Factor snnn.n SMZ
Control Point snnn.n F CTRL_PNT
Entering Fluid Temp snnn.n F EWT
Leaving Fluid Temp snnn.n F LWT
Ramp Load Limited On/Off MODE_5
Slow Change Override On/Off MODE_9
Cooler Freeze Protection On/Off MODE_16
Low Temperature Cooling On/Off MODE_17
High Temperature Cooling On/Off MODE_18
Minimum Comp. On Time On/Off MODE_23
CCN MAINTENANCE TABLES — PM-PUMP
DESCRIPTION VALUE UNITS POINT NAME
Pump Service Interval nnnnnn hours SI_PUMPS
Pump 1 Service Countdown nnnnnn hours P1_CDOWN
Pump 1 Maintenance Done Yes/No P1_MAINT
Pump 2 Service Countdown nnnnnn hours P2_CDOWN
Pump 2 Maintenance Done Yes/No P2_MAINT
Pump 1 Maintenance Date mm/dd/yy hh:mm PMP1_PM0
Pump 1 Maintenance Date mm/dd/yy hh:mm PMP1_PM1
Pump 1 Maintenance Date mm/dd/yy hh:mm PMP1_PM2
Pump 1 Maintenance Date mm/dd/yy hh:mm PMP1_PM3
Pump 1 Maintenance Date mm/dd/yy hh:mm PMP1_PM4
Pump 2 Maintenance Date mm/dd/yy hh:mm PMP2_PM0
Pump 2 Maintenance Date mm/dd/yy hh:mm PMP2_PM1
Pump 2 Maintenance Date mm/dd/yy hh:mm PMP2_PM2
Pump 2 Maintenance Date mm/dd/yy hh:mm PMP2_PM3
Pump 2 Maintenance Date mm/dd/yy hh:mm PMP2_PM4
CCN MAINTENANCE TABLES — PM-STRN
DESCRIPTION VALUE UNITS POINT NAME
Strainer Srvc Interval nnnnnn hours SI_STRNR
Strainer Srvc Countdown nnnnnn hours ST_CDOWN
Strainer Maint. Done Yes/No ST_MAINT
Strainer Maint. Date mm/dd/yy hh:mm STRN_PM0
Strainer Maint. Date mm/dd/yy hh:mm STRN_PM1
Strainer Maint. Date mm/dd/yy hh:mm STRN_PM2
Strainer Maint. Date mm/dd/yy hh:mm STRN_PM3
Strainer Maint. Date mm/dd/yy hh:mm STRN_PM4
CCN MAINTENANCE TABLES — PM-COIL
DESCRIPTION VALUE UNITS POINT NAME
Coil Cleaning Srvc Inter nnnnnn hours SI_COIL
Coil Service Countdown nnnnnn hours CL_CDOWN
Coil Cleaning Maint.Done Yes/No CL_MAINT
Coil Cleaning Maint.Date mm/dd/yy hh:mm COIL_PM0
Coil Cleaning Maint.Date mm/dd/yy hh:mm COIL_PM1
Coil Cleaning Maint.Date mm/dd/yy hh:mm COIL_PM2
Coil Cleaning Maint.Date mm/dd/yy hh:mm COIL_PM3
Coil Cleaning Maint.Date mm/dd/yy hh:mm COIL_PM4

125
 APPENDIX B — CCN TABLES (CONT)
CCN MAINTENANCE TABLES — TESTMODE
DESCRIPTION VALUE UNITS POINT NAME
Service Test Mode On/Off NET_CTRL
Compressor A1 Relay On/Off S_A1_RLY
Compressor A2 Relay On/Off S_A2_RLY
Compressor A3 Relay On/Off S_A3_RLY
Compressor A4 Relay On/Off S_A4_RLY
Compressor B1 Relay On/Off S_B1_RLY
Compressor B2 Relay On/Off S_B2_RLY
Compressor B3 Relay On/Off S_B3_RLY
Compressor B4 Relay On/Off S_B4_RLY
Fan 1 Relay On/Off S_FAN_1
Fan 2 Relay On/Off S_FAN_2
Fan 3 Relay On/Off S_FAN_3
Fan 4 Relay On/Off S_FAN_4
Fan 5 Relay On/Off S_FAN_5
Fan 6 Relay On/Off S_FAN_6
Fan 7 Relay On/Off S_FAN_7
Fan 8 Relay On/Off S_FAN_8
Cooler Pump Relay 1 On/Off S_CLPMP1
Cooler Pump Relay 2 On/Off S_CLPMP2
Comp A1 Unload Time nn sec S_A1ULTM
Minimum Load Valve Relay On/Off S_MLV
Remote Alarm Relay On/Off S_ALM
EXV % Open nn % S_EXV_A
EXV % Open nn % S_EXV_B
CCN MAINTENANCE TABLES — RUNTEST
DESCRIPTION VALUE UNITS POINT NAME
Percent Total Capacity nnn % CAPA_T
Percent Available Cap. nnn % CAPA_A
Discharge Pressure nnn.n psig DP_A
Suction Pressure nnn.n psig SP_A
Head Setpoint nnn.n F HSP
Saturated Condensing Tmp nnn.n F TMP_SCTA
Saturated Suction Temp nnn.n F TMP_SSTA
Compr Return Gas Temp nnn.n F TMP_RGTA
Discharge Gas Temp nnn.n F DISGAS
Suction Superheat Temp nnn.n ^F SH_A
Compressor A1 Relay On/Off K_A1_RLY
Compressor A2 Relay On/Off K_A2_RLY
Compressor A3 Relay On/Off K_A3_RLY
Minimum Load Valve Relay On/Off MLV_RLY
Compressor A1 Feedback On/Off K_A1_FBK
Compressor A2 Feedback On/Off K_A2_FBK
Compressor A3 Feedback On/Off K_A3_FBK
Percent Total Capacity nnn % CAPB_T
Percent Available Cap. nnn % CAPB_A
Discharge Pressure nnn.n psig DP_B
Suction Pressure nnn.n psig SP_B
Head Setpoint nnn.n F HSP
Saturated Condensing Tmp nnn.n F TMP_SCTB
Saturated Suction Temp nnn.n F TMP_SSTB
Compr Return Gas Temp nnn.n F TMP_RGTB
Suction Superheat Temp nnn.n ^F SH_B
Compressor B1 Relay On/Off K_B1_RLY
Compressor B2 Relay On/Off K_B2_RLY
Compressor B3 Relay On/Off K_B3_RLY

126
 APPENDIX B — CCN TABLES (CONT)
CCN MAINTENANCE TABLES — RUNTEST (cont)
DESCRIPTION VALUE UNITS POINT NAME
Minimum Load Valve Relay On/Off MLV_RLY
Compressor B1 Feedback On/Off K_B1_FBK
Compressor B2 Feedback On/Off K_B2_FBK
Compressor B3 Feedback On/Off K_B3_FBK
Fan 1 Relay On/Off FAN_1
Fan 2 Relay On/Off FAN_2
Fan 3 Relay On/Off FAN_3
Fan 4 Relay On/Off FAN_4
Fan 5 Relay On/Off FAN_5
Fan 6 Relay On/Off FAN_6
Fan 7 Relay On/Off FAN_7
Fan 8 Relay On/Off FAN_8
Outside Air Temperature nnn.n F OAT
Space Temperature nnn.n F SPT
Cooler Pump Relay 1 On/Off COOLPMP1
Cooler Pump Relay 2 On/Off COOLPMP2
Cooler Pump 1 Interlock Open/Closed PMP1_FBK
Cooler Pump 2 Interlock Open/Closed PMP2_FBK
Cooler Entering Fluid nnn.n F COOL_EWT
Cooler Leaving Fluid nnn.n F COOL_LWT
Compressor A1 Size nnn tons SIZE_A1
Compressor A2 Size nnn tons SIZE_A2
Compressor A3 Size nnn tons SIZE_A3
Compressor B1 Size nnn tons SIZE_B1
Compressor B2 Size nnn tons SIZE_B2
Compressor B3 Size nnn tons SIZE_B3
Cooler Flow Switch On/Off COOLFLOW

CCN MAINTENANCE TABLES — DUALCHIL

DESCRIPTION VALUE UNITS POINT NAME
Dual Chiller Link Good? Yes/No DC_LINK
Master Chiller Role Stand Alone,
Lead Chiller, MC_ROLE
Lag Chiller
Slave Chiller Role Stand Alone,
Lead Chiller, SC_ROLE
Lag Chiller
Lead Chiller Ctrl Point snnn.n F LEAD_CP
Lag Chiller Ctrl Point snnn.n F LAG_CP
Control Point snnn.n F CTRL_PNT
Cool EnteringFluid-Slave snnn.n F COOLEWTS
Cool Leaving Fluid-Slave snnn.n F COOLLWTS
Cooler Entering Fluid snnn.n F COOL_EWT
Cooler Leaving Fluid snnn.n F COOL_LWT
Lead/Lag Leaving Fluid snnn.n F DUAL_LWT
Percent Avail.Capacity 0-100 % CAP_A
Percent Avail.Cap.Slave 0-100 % CAP_A_S
Lag Start Delay Time hh:mm LAGDELAY
Load/Unload Factor snnn.n SMZ
Load/Unload Factor-Slave snnn.n SMZSLAVE
Lead SMZ Clear Commanded Yes/No LEADSMZC
Lag SMZ Clear Commanded Yes/No LAG_SMZC
Lag Commanded Off? Yes/No LAG_OFF
Dual Chill Lead CapLimit 0-100 % DCLDCAPL
Dual Chill Lag CapLimit 0-100 % DCLGCAPL

127
 APPENDIX C — FACTORY SETTINGS FOR PUMP AND MANUAL STARTERS
30RAP UNIT SIZE PUMP SIZE PUMP OPTIONa UNIT VOLTAGE OVERLOAD SETTING
208/230-60 4.6
380-60 2.6
1.5 HP 2, 9
460-60 2.2
575-60 1.7
208/230-60 9.1
380-60 5.2
3 HP 3, 4, B, C
460-60 4.3
575-60 3.3
208/230-60 14.5
380-60 8.1
010-060 5 HP 5, 6, D, F
460-60 6.7
575-60 5.3
208/230-60 21.3
380-60 12.0
7.5 HP 7, G
460-60 10.0
575-60 8.1
208/230-60 28.8
380-60 16.1
10 HP Z, H
460-60 13.2
575-60 10.6
208/230-60 9.1
380-60 5.2
1, C
460-60 4.3
575-60 3.3
3 HP
208/230-60 10.5
380-60 5.9
6, J
460-60 4.8
575-60 3.8
208/230-60 14.5
380-60 8.1
2,D (070-130)
460-60 6.7
575-60 5.3
208/230-60 17.7
380-60 9.3
5 HP 2,D (150-ton only)
460-60 8.2
575-60 6.2
208/230-60 14.5
380-60 8.1
7,K
460-60 6.7
070-150 575-60 5.3
208/230-60 21.3
380-60 12.0
3,F (070-130)
460-60 10.0
575-60 8.1
208/230-60 25.3
380-60 14.1
7.5 HP 3,F (150-ton only)
460-60 11.6
575-60 9.3
208/230-60 21.3
380-60 12.0
8,L
460-60 10.0
575-60 8.1
208/230-60 28.8
380-60 16.1
10 HP 4,9,G,M
460-60 13.2
575-60 10.6
208/230-60 42.2
380-60 24.2
15 HP 5,B,H,N
460-60 19.6
575-60 16.1

NOTE(S):
a. Identified by 12th digit in unit model number.

128
 APPENDIX D — BACNET COMMUNICATION
The following section is used to configure the UPC Open control-
ler which is used when the BACnet1 communication option is
selected. The UPC Open controller is mounted in the main control 9 0
box per unit components arrangement diagrams.

1
7 8

2 34
10's
TO ADDRESS THE UPC OPEN CONTROLLER

6
5

The user must give the UPC Open controller an address that is 9 0

1
unique on the BACnet network. Perform the following procedure

7 8

2 34
1's
to assign an address:

6
5
1. If the UPC Open controller is powered, pull the screw ter-
minal connector from the controller’s power terminals
labeled Gnd and HOT. The controller reads the address Fig. B — Address Rotary Switches
each time power is applied to it.
2. Using the rotary switches (see Fig. A and B), set the con- BACNET DEVICE INSTANCE ADDRESS
troller’s address. Set the Tens (10’s) switch to the tens digit The UPC Open controller also has a BACnet Device Instance ad-
of the address, and set the Ones (1’s) switch to the ones dress. This Device Instance MUST be unique for the complete
digit. BACnet system in which the UPC Open controller is installed.
The Device Instance is auto generated by default and is derived by
As an example in Fig. B, if the controller’s address is 25, point the adding the MAC address to the end of the Network Number. The
arrow on the Tens (10’s) switch to 2 and the arrow on the Ones Network Number of a new UPC Open controller is 16101, but it
(1’s) switch to 5.
can be changed using i-Vu® Tools or BACView device. By de-
fault, a MAC address of 20 will result in a Device Instance of
1. Third-party trademarks and logos are the property of their respective 16101 + 20 which would be a Device Instance of 1610120.
owners.

BT485
Terminator

BACnet
Connection
(BAS Port) Power LED

Tx1 LED

Rx1 LED

Tx2 LED

Rx2 LED BACnet

Baud Rate
DIP Switches
8
67 9
EIA-485 10
01
45

Jumpers 23
Address
8
67 9 Rotary
1
01
45

23
Switches

Run LED

Error LED

Fig. A — UPC Open Controller

129
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)
CONFIGURING THE BAS PORT FOR BACNET MS/TP
Use the same baud rate and communication settings for all con-
trollers on the network segment. The UPC Open controller is fixed
at 8 data bits, No Parity, and 1 Stop bit for this protocol’s commu-
nications.
If the UPC Open controller has been wired for power, pull the
screw terminal connector from the controller’s power terminals la-
beled Gnd and HOT. The controller reads the DIP Switches and
jumpers each time power is applied to it.
Set the BAS Port DIP switch DS3 to “enable.” Set the BAS Port
DIP switch DS4 to “E1-485.” Set the BMS Protocol DIP switches
DS8 through DS5 to “MSTP.” See Table A.
Fig. C — DIP Switches
Table A — SW3 Protocol Switch Settings for MS/TP Wire the controllers on an MS/TP network segment in a daisy-
DS8 DS7 DS6 DS5 DS4 DS3
chain configuration. Wire specifications for the cable are 22 AWG
(American Wire Gage) or 24 AWG, low-capacitance, twisted,
Off Off Off Off On Off
stranded, shielded copper wire. The maximum length is 2000 ft.
Verify that the EIA-485 jumpers below the CCN Port are set to Install a BT485 terminator on the first and last controller on a net-
EIA-485 and 2W. work segment to add bias and prevent signal distortions due to
The example in Fig. C shows the BAS Port DIP Switches set for echoing. See Fig. A, D, and E.
76.8k (Carrier default) and MS/TP. To wire the UPC Open controller to the BAS network:
Set the BAS Port DIP Switches DS2 and DS1 for the appropriate 1. Pull the screw terminal connector from the controller’s BAS
communications speed of the MS/TP network (9600, 19.2k, Port.
38.4k, or 76.8k bps). See Fig. C and Table B. 2. Check the communications wiring for shorts and grounds.
Table B — Baud Selection Table 3. Connect the communications wiring to the BAS port’s screw
BAUD RATE DS2 DS1 terminals labeled Net +, Net -, and Shield.
9,600 Off Off NOTE: Use the same polarity throughout the network segment.
19,200 On Off 4. Insert the power screw terminal connector into the UPC Open
38,400 Off On controller’s power terminals if they are not currently con-
76,800 On On nected.
WIRING THE UPC OPEN CONTROLLER TO THE MS/TP 5. Verify communication with the network by viewing a module
NETWORK status report. To perform a module status report using the
The UPC Open controller communicates using BACnet on an BACview keypad/display unit, press and hold the “FN” key
MS/TP network segment communications at 9600 bps, 19.2 kbps, then press the “.” key.
38.4 kbps, or 76.8 kbps.

Fig. D — Network Wiring

130
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)

Fig. E — BT485 Terminator Installation

To install a BT485 terminator, push the BT485 terminator on to and a tougher outer jacket than the SmokeGard1 specification, and
the BT485 connector located near the BACnet connector. it is appropriate for use in applications where the user is concerned
NOTE: The BT485 terminator has no polarity associated with it. about abrasion. The Halar jacket is also less likely to crack in ex-
tremely low temperatures.
To order a BT485 terminator, contact your Carrier representative.
NOTE: Use the specified type of wire and cable for maximum sig-
MS/TP WIRING RECOMMENDATIONS nal integrity.
Recommendations are shown in Tables C and D. The wire jacket
and UL temperature rating specifications list two acceptable alter- 1. Third-party trademarks and logos are the property of their respective
natives. The Halar1 specification has a higher temperature rating owners.

Table C — MS/TP Wiring Recommendations

SPECIFICATION RECOMMENDATION
CABLE Single twisted pair, low capacitance, CL2P, 22 AWG (7x30), TC foam FEP, plenum rated cable
CONDUCTOR 22 or 24 AWG stranded copper (tin plated)
INSULATION Foamed FEP 0.015 in. (0.381 mm) wall 0.060 in. (1.524 mm) O.D.
COLOR CODE Black/White
TWIST LAY 2 in. (50.8 mm) lay on pair 6 twists/foot (20 twists/meter) nominal
SHIELDING Aluminum/Mylar shield with 24 AWG TC drain wire
SmokeGard Jacket (SmokeGard PVC) 0.021 in. (0.5334 mm) wall 0.175 in. (4.445 mm) O.D.
JACKET
Halar Jacket (E-CTFE) 0.010 in. (0.254 mm) wall 0.144 in. (3.6576 mm) O.D.
DC RESISTANCE 15.2 Ohms/1000 feet (50 Ohms/km) nominal
CAPACITANCE 12.5 pF/ft (41 pF/meter) nominal conductor to conductor
CHARACTERISTIC IMPEDANCE 100 Ohms nominal
WEIGHT 12 lb/1000 feet (17.9 kg/km)
SmokeGard 167°F (75°C)
UL TEMPERATURE RATING
Halar -40 to 302°F (-40 to 150°C)
VOLTAGE 300 Vac, power limited
LISTING UL: NEC CL2P, or better
LEGEND
AWG — American Wire Gage
CL2P — Class 2 Plenum Cable
DC — Direct Current
FEP — Fluorinated Ethylene Polymer
NEC — National Electrical Code
O.D. — Outside Diameter
TC — Tinned Copper
UL — Underwriters Laboratories

131
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)
Table D — Open System Wiring Specifications and Recommended Vendors
WIRING SPECIFICATIONS RECOMMENDED VENDORS AND PART NUMBERS
CONNECT AIR CONTRACTORS
WIRE TYPE DESCRIPTION INTERNATIONAL BELDEN RMCORP WIRE AND CABLE
22 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide for W221P-22227 — 25160PV CLP0520LC
MS/TP specifications.
NETWORK
(RS-485) 24 AWG, single twisted shielded pair, low capacitance, CL2P,
TC foam FEP, plenum rated. See MS/TP Installation Guide W241P-2000F 82841 25120-OR —
for specifications.
RNET 4 conductor, unshielded, CMP, 18 AWG, plenum rated. W184C-2099BLB 6302UE 21450 CLP0442
LEGEND
AWG — American Wire Gage
CL2P — Class 2 Plenum Cable
CMP — Communications Plenum Rated
FEP — Fluorinated Ethylene Polymer
TC — Tinned Copper

LOCAL ACCESS TO UPC OPEN CONTROLLER The factory default settings for CCN Element and CCN Bus num-
The user can use a BACview6 handheld keypad display unit or the ber are 1 and 0 respectively.
Virtual BACview software as a local user interface to an Open If modifications to the default Element and Bus number are re-
controller. These items let the user access the controller network quired, both the ComfortLink and UPC Open configurations must
information. These are accessory items and do not come with the be changed.
UPC Open controller. The following configurations are used to set the CCN Address and
The BACview6 unit connects to the local access port on the UPC Bus number in the ComfortLink controller. These configurations
Open controller. See Fig. F. The BACview software must be run- can be changed using the scrolling marquee display or accessory
ning on a laptop computer that is connected to the local access port Navigator handheld device.
on the UPC Open controller. The laptop will require an additional Configuration→CCN→CCN.A (CCN Address)
USB link cable for connection. Configuration→CCN→CCN.B (CCN Bus Number)
See the BACview Installation and User Guide for instructions on The following configurations are used to set the CCN Address and
connecting and using the BACview6 device. Bus Number in the UPC Open controller. These configurations
To order a BACview6 Handheld (BV6H), contact your Carrier can be changed using the accessory BACview6 display.
representative. Navigation: BACview→CCN
CONFIGURING THE UPC OPEN CONTROLLER’S PROP- Home: Element Comm Stat
ERTIES Element: 1
Bus: 0
The UPC Open device and ComfortLink controller must be set to
the same CCN Address (Element) number and CCN Bus number.

Fig. F — BACview6 Device Connection

132
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)
If the UPC Open is used with the chiller application of Lead/Lag/ the baud rate the more solid the LEDs become. See Fig. A for lo-
Standby, all chillers and UPC Open’s CCN element numbers must cation of LEDs on the UPC Open module.
be changed to a unique number in order to follow CCN specifica-
tions. In this application, there can only be a maximum of 3 UPC REPLACING THE UPC OPEN BATTERY
Open controllers on a CCN bus. The UPC Open controller’s 10-year lithium CR2032 battery pro-
For the CCN Alarm Acknowledger configuration, the UPC Open vides a minimum of 10,000 hours of data retention during power
defaults to CCN Acknowledger. If a Chiller Lead/Lag/Standby ap- outages.
plication is being used, then the Carrier technician must change
the configuration to only one CCN Acknowledger on the IMPORTANT: Power must be ON to the UPC Open when re-
CCN bus. placing the battery, or the date, time, and trend data will be lost.
For the CCN Time Broadcaster configuration, the UPC Open de-
faults to CCN Time Broadcaster. If Chiller Lead/Lag/Standby ap- Remove the battery from the controller, making note of the bat-
plication is used, then the Carrier technician must change the con- tery’s polarity. Insert the new battery, matching the battery’s polar-
figuration to only one CCN Time Broadcaster on the CCN bus. ity with the polarity indicated on the UPC Open controller.

TROUBLESHOOTING NETWORK POINTS LIST

If there are problems wiring or addressing the UPC Open control- The points list for the controller is shown in Table G.
ler, contact your Carrier representative. Refer to Appendix B for additional information on CCN point
name.
COMMUNICATION LEDS
The LEDs indicate if the controller is communicating with the de-
vices on the network. See Tables E and F. The LEDs should re-
flect communication traffic based on the baud rate set. The higher

Table E — LED Status Indicators

LED STATUS
Lights when power is being supplied to the controller. The UPC Open controller is protected by internal solid-state polyswitches on
POWER the incoming power and network connections. These polyswitches are not replaceable and will reset themselves if the condition that
caused the fault returns to normal.
RX Lights when the controller receives data from the network segment; there is an Rx LED for Ports 1 and 2.
TX Lights when the controller transmits data to the network segment; there is a Tx LED for Ports 1 and 2.
RUN Lights based on controller status. See Table F.
ERROR Lights based on controller status. See Table F.

Table F — Run and Error LEDs Controller and Network Status Indication
RUN LED ERROR LED STATUS
2 flashes per second Off Normal
2 flashes per second 2 flashes, alternating with Run LED Five minute auto-restart delay after system error
2 flashes per second 3 flashes, then off Controller has just been formatted
2 flashes per second 1 flash per second Controller is alone on the network
2 flashes per second On Exec halted after frequent system errors or control programs halted
5 flashes per second On Exec start-up aborted, Boot is running
5 flashes per second Off Firmware transfer in progress, Boot is running
7 flashes per second 7 flashes per second, alternating with Run LED Ten second recovery period after brownout
14 flashes per second 14 flashes per second, alternating with Run LED Brownout

133
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)
Table G — Network Points List

POINT DESCRIPTION CCN POINT READ/ UNITS DEFAULT RANGE BACNET BACNET
NAME WRITE VALUE OBJECT ID OBJECT NAME
4-20 mA Demand Signal LMT_MA R mA AV:36 lmt_ma_1
4-20 mA Reset Signal RST_MA R °F AV:33 rst_ma_1
Active Demand Limit DEM_LIM R/W % 100 0 - 100 AV:2 dem_lim_1
Active Setpoint SP R °F AV:4 sp_1
1 = Normal
Alarm State ALM R 2 = Alert MSV:1 alm_msv_1
3 = Alarm
Available Cap Nominal Tons CALCTONS R TONS 0 - 200 AV:84 calctons_1
CCN Chiller CHIL_S_S R/W Start Start/Stop BV:4 chil_s_s_1
Circuit A Run Hours HR_CIRA R hr AV:59 hr_cira_1
Circuit A Starts CY_CIRA R AV:67 cy_cira_1
Circuit B Run Hours HR_CIRB R hr AV:63 hr_cirb_1
Circuit B Starts CY_CIRB R AV:71 cy_cirb_1
Coil Cleaning Maint.Done CL_MAINT R/W No Yes/No BV:54 cl_maint_1
Coil Cleaning Srvc Inter SI_COIL R/W hr 8760 0 - 65535 AV:50 si_coil_1
Coil Service Countdown CL_CDOWN R hr AV:49 cl_cdown_1
Comp A1 Unload Time A1UNLTME R AV:78 a1unltme_1
Compr Return Gas Temp TMP_RGTA R °F AV:20 tmp_rgta_1
Compr Return Gas Temp TMP_RGTB R °F AV:28 tmp_rgtb_1
Compressor A1 Feedback K_A1_FBK R BV:16 k_a1_fbk_1
Compressor A1 Relay K_A1_RLY R BV:13 k_a1_rly_1
Compressor A1 Run Hours HR_A1 R hr AV:60 hr_a1_1
Compressor A1 Starts CY_A1 R AV:68 cy_a1_1
Compressor A2 Feedback K_A2_FBK R BV:17 k_a2_fbk_1
Compressor A2 Relay K_A2_RLY R BV:14 k_a2_rly_1
Compressor A2 Run Hours HR_A2 R hr AV:61 hr_a2_1
Compressor A2 Starts CY_A2 R AV:69 cy_a2_1
Compressor A3 Feedback K_A3_FBK R On/Off BV:18 k_a3_fbk_1
Compressor A3 Relay K_A3_RLY R On/Off BV:15 k_a3_rly_1
Compressor A3 Run Hours HR_A3 R hr 0-9999 AV:62 hr_a3_1
Compressor A3 Starts CY_A3 R 0-9999 AV:70 cy_a3_1
Compressor B1 Feedback K_B1_FBK R BV:22 k_b1_fbk_1
Compressor B1 Relay K_B1_RLY R BV:19 k_b1_rly_1
Compressor B1 Run Hours HR_B1 R hr AV:64 hr_b1_1
Compressor B1 Starts CY_B1 R AV:72 cy_b1_1
Compressor B2 Feedback K_B2_FBK R BV:23 k_b2_fbk_1
Compressor B2 Relay K_B2_RLY R BV:20 k_b2_rly_1
Compressor B2 Run Hours HR_B2 R hr AV:65 hr_b2_1
Compressor B2 Starts CY_B2 R AV:73 cy_b2_1
Compressor B3 Feedback K_B3_FBK R On/Off BV:24 k_b3_fbk_1
Compressor B3 Relay K_B3_RLY R On/Off BV:21 k_b3_rly_1
Compressor B3 Run Hours HR_B3 R hr 0-9999 AV:66 hr_b3_1
Compressor B3 Starts CY_B3 R 0-9999 AV:74 cy_b3_1
1 = Switch
Control Method CONTROL R 3 = Occupancy MSV:5 control_msv_1
4 = CCN
LEGEND
R — Read
W — Write

134
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)
Table G — Network Points List (cont)

POINT DESCRIPTION CCN POINT READ/ UNITS DEFAULT RANGE BACNET BACNET
NAME WRITE VALUE OBJECT ID OBJECT NAME
1 = Test
2 = Local Off
3 = CCN Off
4 = Clock Off
Control Mode STAT R 5 = Emergency Stop AV:8 stat_1
6 = Local On
7 = CCN On
8 = Clock On
9 = Heat Enabled
10 = Pump Delay
Control Point CTRL_PNT R/W °F 44.0 -20 - 70 AV:5 ctrl_pnt_1
Cooler Entering Fluid COOL_EWT R °F AV:30 cool_ewt_1
Cooler Flow Switch COOLFLOW R BV:11 coolflow_1
Cooler Freeze Protection MODE_16 R BV:42 mode_16_1
Cooler Leaving Fluid COOL_LWT R °F AV:31 cool_lwt_1
Cooler LWT Setpoint LWT_SP R °F AV:38 lwt_sp_1
Cooler Pump 1 Interlock PMP1_FBK R BV:9 pmp1_fbk_1
Cooler Pump 2 Interlock PMP2_FBK R BV:10 pmp2_fbk_1
Cooler Pump Relay 1 COOLPMP1 R BV:7 coolpmp1_1
Cooler Pump Relay 2 COOLPMP2 R BV:8 coolpmp2_1
Cooler Pump Select PMP_SLCT R/W AV:40 pmp_slct_1
Cooler Pump Shutdown Dly PUMP_DLY R/W min 1 0 - 10 AV:41 pump_dly_1
Cooler/Pump Heater COOL_HTR R BV:59 cool_htr_1
Cooling Ramp Loading CRAMP R/W 1.0 0.2 - 2.0 AV:56 cramp_1
1 = No Reset
2 = 4-20mA Input
3 = External Temp-
Cooling Reset Type CRST_TYP R OAT MSV:7 crst_typ1_msv_1
4 = Return Fluid
5 = External Temp-
SPT
Cooling Setpoint 1 CSP1 R/W °F 44.0 -20 - 70 AV:53 csp1_1
Cooling Setpoint 2 CSP2 R/W °F 44.0 -20 - 70 AV:54 csp2_1
CSM Controlling Chiller MODE_1 R BV:30 mode_1_1
Demand Level 1 R/W % AV:80 dmv_lvl_1_perct_1
Demand Level 2 R/W % AV:81 dmv_lvl_2_perct_1
Demand Level 3 R/W % AV:82 dmv_lvl_3_perct_1
1 = None
2 = External Sw.
Demand Limit Select DMD_CTRL R Input MSV:8 dmd_ctrl_msv_1
3 = 4-20mA Input
4 = Loadshed
Demand Limit Switch 1 DMD_SW1 R BV:25 dmd_sw1_1
Demand Limit Switch 2 DMD_SW2 R BV:26 dmd_sw2_1
Demand/Sound Limited MODE_15 R BV:41 mode_15_1
Discharge Gas Temp DISGAS R °F AV:15 disgas_1
Discharge Pressure DP_A R psig AV:13 dp_a_1
Discharge Pressure DP_B R psig AV:23 dp_b_1
Dual Setpoint MODE_13 R BV:39 mode_13_1
Dual Setpoint Switch DUAL_IN R BV:29 dual_in_1
Element Comm Status R BV:2999 element_stat_1
Emergency Stop EMSTOP R/W Enabled Enabled/Emstop BV:6 emstop_1
Entering Fluid Temp EWT R °F AV:6 ewt_1
EXV% Open EXV_A R % AV:18 exv_a_1
EXV% Open EXV_B R % AV:27 exv_b_1
LEGEND
R — Read
W — Write

135
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)
Table G — Network Points List (cont)

POINT DESCRIPTION POINT NAME READ/ UNITS DEFAULT RANGE BACNET BACNET
WRITE VALUE OBJECT ID OBJECT NAME
Fan Relay 1 FAN_1 R BV:60 fan_1_1
Fan Relay 2 FAN_2 R BV:61 fan_2_1
Fan Relay 3 FAN_3 R BV:62 fan_3_1
Fan Relay 4 FAN_4 R BV:63 fan_4_1
Fan Relay 5 FAN_5 R BV:64 fan_5_1
Fan Relay 6 FAN_6 R BV:65 fan_6_1
Fan Relay 7 FAN_7 R BV:66 fan_7_1
Fan Relay 8 FAN_8 R BV:67 fan_8_1
Head Setpoint HSP R °F AV:29 hsp_1
Heat Request HEAT_REQ R BV:28 heat_req_1
High SCT Circuit A MODE_21 R BV:47 mode_21_1
High SCT Circuit B MODE_22 R BV:48 mode_22_1
High Temperature Cooling MODE_18 R BV:44 mode_18_1
Ice Done ICE_DONE R BV:27 ice_done_1
Ice Setpoint CSP3 R/W °F 32.0 -20 - 32 AV:55 csp3_1
1 = Automatic
Lead Pump LEADPUMP R 2 = Pump 1 MSV:9 leadpump_msv_1
3 = Pump 2
4 = No Configuration
1 = Automatic
Lead/Lag Circuit Select LEAD_TYP R 1 2 = Circuit A Leads AV:43 lead_typ_1
3 = Circuit B Leads
Lead/Lag Leaving Fluid DUAL_LWT R °F AV:32 dual_lwt_1
Leaving Fluid Temp - Prime
LWT R °F AV:7 lwt_1
Variable
Loading Sequence Select SEQ_TYPE R AV:77 seq_type_1
Low Cooler Suction Temp A MODE_7 R BV:35 mode_7_1
Low Cooler Suction Temp B MODE_8 R BV:36 mode_8_1
Low Sound Active LSACTIVE R BV:2 lsactive_1
Low Sound Mode MODE_25 R BV:51 mode_25_1
Low Temperature Cooling MODE_17 R BV:43 mode_17_1
Machine Operating Hours HR_MACH R hr AV:57 hr_mach_1
Machine Starts CY_MACH R AV:58 cy_mach_1
Making ICE MODE_19 R BV:45 mode_19_1
Master/Slave Control MODE_3 R BV:32 mode_3_1
Minimum Comp. On Time MODE_23 R BV:49 mode_23_1
Minimum Load Valve Relay MLV_RLY R BV:79 mlv_rly_1
Minimum OFF Time Active MODE_10 R BV:38 mode_10_1
Minutes Off Time DELAY R/W min 0 0 - 15 AV:42 delay_1
Minutes Left for Start MIN_LEFT R min 00:00-15:00 AV:34 min_left_1
Occupancy Status OCC R BV:2008 occ_status
Outdoor Air Temperature OAT R/W °F AV:1003 oat_1
Override Modes in Effect MODE R BV:5 mode_1
Percent Available Cap. CAPA_A R % AV:12 capa_a_1
Percent Available Cap. CAPB_A R % AV:22 capb_a_1
Percent Total Capacity CAP_T R % AV:3 cap_t_1
Percent Total Capacity CAPA_T R % AV:11 capa_t_1
Percent Total Capacity CAPB_T R % AV:21 capb_t_1
Pump 1 Maintenance Done P1_MAINT R/W No Yes/No BV:52 p1_maint_1
Pump 1 Run Hours HR_PUMP1 R hr AV:75 hr_pump1_1
Pump 1 Service Countdown P1_CDOWN R hr AV:46 p1_cdown_1
Pump 2 Maintenance Done P2_MAINT R/W No Yes/No BV:53 p2_maint_1
Pump 2 Run Hours HR_PUMP2 R hr AV:76 hr_pump2_1
Pump 2 Service Countdown P2_CDOWN R hr AV:47 p2_cdown_1
Pump Changeover Hours PMP_DLTA R/W hr 500 10 - 2000 AV:39 pmp_dlta_1
Pump Off Delay Time MODE_24 R BV:50 mode_24_1
Pump Service Interval SI_PUMPS R/W hr 8760 0 - 65535 AV:48 si_pumps_1
Ramp Load Limited MODE_5 R BV:33 mode_5_1
Requested Stage STAGE R AV:9 stage_1
LEGEND
R — Read
W — Write

136
 APPENDIX D — BACNET COMMUNICATION OPTION (CONT)
Table G — Network Points List (cont)

POINT DESCRIPTION POINT NAME READ/ UNITS DEFAULT RANGE BACNET BACNET
WRITE VALUE OBJECT ID OBJECT NAME
Rotate Cooler Pumps Now ROT_PUMP R/W No No/Yes BV:12 rot_pump_1
Saturated Condensing Tmp TMP_SCTA R °F AV:16 tmp_scta_1
Saturated Condensing Tmp TMP_SCTB R °F AV:25 tmp_sctb_1
Saturated Suction Temp TMP_SSTA R °F AV:17 tmp_ssta_1
Saturated Suction Temp TMP_SSTB R °F AV:26 tmp_sstb_1
Slow Change Override MODE_9 R BV:37 mode_9_1
Storing ICE MODE_20 R BV:46 mode_20_1
Strainer Maint. Done ST_MAINT R/W No Yes/No BV:55 st_maint_1
Strainer Srvc Countdown ST_CDOWN R hr AV:52 st_cdown_1
Strainer Srvc Interval SI_STRNR R/W hr 8760 0 - 65535 AV:51 si_strnr_1
Suction Pressure SP_A R psig AV:14 sp_a_1
Suction Pressure SP_B R psig AV:24 sp_b_1
Suction Superheat Temp SH_A R °^F AV:44 sh_a_1
Suction Superheat Temp SH_B R °^F AV:45 sh_b_1
System Cooling Demand Level R AV:9006 cool_demand_level_1
System Demand Limiting R BV:83 dem_lmt_act_1
Temperature Reset MODE_14 R BV:40 mode_14_1
Timed Override In Effect MODE_6 R BV:34 mode_6_1
User Defined Analog 1 R/W sq m AV:2901 user_analog_1_1
User Defined Analog 2 R/W sq m AV:2902 user_analog_2_1
User Defined Analog 3 R/W sq m AV:2903 user_analog_3_1
User Defined Analog 4 R/W sq m AV:2904 user_analog_4_1
User Defined Analog 5 R/W sq m AV:2905 user_analog_5_1
User Defined Binary 1 R/W sq m BV:2911 user_binary_1_1
User Defined Binary 2 R/W sq m BV:2912 user_binary_2_1
User Defined Binary 3 R/W sq m BV:2913 user_binary_3_1
User Defined Binary 4 R/W sq m BV:2914 user_binary_4_1
User Defined Binary 5 R/W sq m BV:2915 user_binary_5_1
Var Head Press Output VHP_ACT R mA AV:19 vhp_act_1
WSM Controlling Chiller MODE_2 R BV:31 mode_2_1
LEGEND
R — Read
W — Write

137
 APPENDIX E — MAINTENANCE SUMMARY
AND LOG SHEETS
30RAP WEEKLY MAINTENANCE LOG

NOTE: To avoid injury to personnel and damage to equipment or

property when performing maintenance listed in this maintenance
log, use good judgment, follow safe practices, and adhere to the
safety considerations/information as outlined in preceding sections
of this Controls, Start-Up, Operation, Service, and Troubleshooting
document.
Plant ___________________________
Machine Model No. ________________

CHECK OPERATOR
DATE OIL LEVEL ALARMS / REMARKS
FAULTS INITIALS

NOTE: Equipment failures caused by lack of adherence to the Maintenance Interval Requirements are not covered under warranty.

138
 APPENDIX E — MAINTENANCE SUMMARY AND LOG SHEETS (CONT)
30RAP Monthly Maintenance Log

NOTE: To avoid injury to personnel and damage to equipment or property when performing
maintenance listed in this maintenance log, use good judgment, follow safe practices, and
adhere to the safety considerations/information as outlined in preceding sections of this Con-
trols, Start-Up, Operation, Service, and Troubleshooting document.
MONTH 1 2 3 4 5 6 7 8 9 10 11 12
DATE / / / / / / / / / / / / / / / / / / / / / / / /
OPERATOR

UNIT SECTION ACTION UNIT ENTRY

Check Oil Level yes/no
COMPRESSOR Leak Test yes/no
Check Crankcase Heater If Equipped yes/no
Inspect and Clean Cooler yes/no Every 3 - 5 Years
Inspect Cooler Heater amps
COOLER Leak Test yes/no
Record Water Pressure Differential (PSI) PSI
139

Inspect Water Pumps yes/no

Leak Test yes/no
CONDENSER
Inspect and Clean Condenser Coil yes/no
General Cleaning and Tightening Connections yes/no Annually
Check Pressure Transducers yes/no
CONTROLS
Confirm Accuracy of Thermistors yes/no
Check Chilled Water Flow Switch Operation yes/no
General Tightening and Cleaning Connections yes/no Annually
STARTER
Inspect All Contactors yes/no
Check Refrigerant Charge yes/no
SYSTEM Verify Operation of EXVs and Record Position 0-100%
Record System Superheat deg. F
NOTE: Equipment failures caused by lack of adherence to the Maintenance Interval Requirements are not covered under warranty.
 APPENDIX E — MAINTENANCE SUMMARY AND LOG SHEETS (CONT)
30RAP Seasonal Shutdown Log
MONTH 1 2 3 4 5 6 7 8 9 10 11 12
DATE / / / / / / / / / / / / / / / / / / / / / / / /
OPERATOR

UNIT SECTION ACTION ENTRY

Isolate and Drain Cooler
COOLER
Add Glycol for Freeze Protection
CONTROLS Do Not Disconnect Control Power
NOTE: Equipment failures caused by lack of adherence to the Maintenance Interval Requirements are not covered under warranty.
140
 INDEX
4 to 20 mA demand limiting 50 Configuring return temperature reset 48 Fault codes 71
Input 39 Control box 9-11 Field servicing instructions 55
Reset 47 Control box maintenance 75 Filter drier 61
Accessory Navigator display module 7 Control components 54 General power failure 76
Adjusting the backlight brightness 7 Control methods and cooling set points 39 Head pressure control 34
Adjusting the contrast 7 Control module communication 27 Heater cable 62
Actual start-up 51 Controls 7-50 Heating operation 40
Advanced scroll temperature protection 85 Conventions used in this manual 3 HEVCF. See High-efficiency variable con-
Alarm and alert codes table 77-82 Cooler 60 denser fans.
Alarm control 29 Cooler entering fluid sensor 30 High-efficiency fan drive parameters 37
Alarm routing control 30 Cooler flow rates and loop volumes 52 High-efficiency variable condenser fans
Alarm equipment priority 29 Cooler freeze protection 34 (HEVCF)
Alarm routing control 29 Cooler freeze-up protection 62 Alarm/alert details 84
Alarms and alerts 92 Cooler leaving fluid sensor 30 Common alarms 83
Alarm system name 29 Cooler pump Fans 37
AUX. See Auxiliary (AUX) board. Control 41 Parameters reset at chiller power cycle 38
Auxiliary (AUX) board 27 Operation 41 High-pressure switch 62
Inputs 28 Sequence of operation 41 Factory settings 62
Outputs 28 Cooling load satisfied 76 Hydronic package 41, 74
BACnet communication option 128-136 Cooling set point select 39 Ice mode 39
Basic controls usage 4 Copeland compressor troubleshooting 86 Kriwan motor protection wiring 86
Board addresses 27 CoreSense communication module Lead/lag determination 32
Brazed-plate cooler heat exchanger DIP switch settings 88 Loading sequence select 32
Cleaning 60 DIP switch settings for Kriwan retrofit 87 Loss-of-cooler flow protection 31
Replacement 60 LED flash codes 89 Low-ambient operation 53
Capacity control 31 Motor protection wiring 88 Low saturated suction 85
Capacity control overrides 32 Motor thermistor plug 88 Low saturated suction protection 34
Carrier comfort network Mounting 88 Low sound fan 69
Carrier Comfort Network (CCN) inter- Crankcase heater 51, 59, 60 Low sound mode operation 40
face 29 Detail under compressor 60 Main base board (MBB) 26
CCN communications bus wiring to op- CSB. See Current Sensor Board. Output relays 28
tional space sensor RJ11 connector 30 Current sensor board (CSB) 27 Thermistor designations 28
CCN control 38 CXB. See Compressor Expansion Board. Maintenance 75
CCN tables 114-126 Deadband multiplier 32, 34 Recommended schedule 75
CCN wiring diagram 27 Demand limit 49 Summary and log sheets 137-139
CCN. See Carrier Comfort Network (CCN) Configuring 50 MBB. See Main Base Board (MBB).
Interface. Digital compressor configuration 50 Microchannel heat exchanger (MCHX) con-
Charge adjustment for brine operation 52 Digital scroll denser coil maintenance and cleaning
Check refrigerant charge 52 Operation 50 recommendations 61
Check refrigerant feed components 61 Option 49 Minimum cooler flow rates 52
Check unit safeties 62 Disassembly and assembly of EXV motor 57 Minimum load control 34
Chilled fluid proof-of-flow switch open 76 Discharge temperature thermistor 30 Minimum load valve 61
Chilled water flow switch 67 Display tables 97-113 Minutes left for start 32
Communication failure retry time 29 Dual chiller configuration tables 44-46 Minutes off time 32
Complete unit stoppage and restart 76 Dual leaving water temperature sensor 30 Moisture-liquid indicator 61
Component drawings 8 Dual leaving water thermistor well 43 Motormaster V controller 37, 70
Component location figures 58, 59 Electronic components 54 Buttons and mode display 73
Compressor expansion board (CXB) 27 Electronic expansion valve 31, 54 Configuration 71
Output relays 28 Cable connections to EXV module 55 Drive programming 73
Status inputs 28 Cutaway figure 54 EPM chip 73
Compressor failure alerts 92-96 Externally powered demand limit 49 General operation 71
Compressor motor sensor harness installa- EXV board 27 Loss of CCN communications 73
tion figure 87 Replacement 55 Program parameters for operating modes
Compressor replacement 57 Steps 54 72
Compressor return gas temperature sensor 30 Troubleshooting Procedure 54 Replacing defective modules 74
Compressor safeties 85 Valve motor replacement 56 Wiring 70
Condenser coil maintenance and cleaning Emergency on/off switch 27 Motor overload protection 86
recommendations 75 EMM. See Energy Management Module Motor protection module 90
Condenser fan layout 35 (EMM). No integral pump — dual external pump
Condenser fans 68 Enable/off/remote contact switch 27 control 41
Configuring and operating dual chiller con- Energy management module (EMM) 27, 31 Occupancy schedule 38
trol 43 EXV. See Electronic Expansion Valve. Oil charge 60
Configuring outdoor air and space tempera- Fan drive operation 37 Open 24-V control circuit breaker(s) 76
ture reset table 47 Fan stages 36 Operating envelope 35

141
Operating limitations 52 Replacement modules 74 Temperature reset 43
Operating modes 6 Replacing thermistors 62 Thermistor/temperature sensor check 62
Operation of machine based on control meth- Round tube plate fin condenser coil mainte- Thermistor connections to main base board
od and cooling set point selection settings nance and cleaning recommendations 61 67
38 Safety considerations 2 Thermistor failure 76
Operation sequence 53 Scrolling marquee display 4 Thermistors 62
Outdoor-air temperature reset 48 Menu structure 5 Thermistor temperatures vs. resistance/volt-
Outdoor-air temperature sensor 30 Sensors 29 age drop 63-66
Part load data percent displacement, standard Cooler leaving fluid sensor 30 Thermistor well 67
units with minimum load valve 33 Service 54-75 Troubleshooting 76-96
Pressure relief devices 61 Service Test 40 Unit enable-off-remote contact switch is off
Pressure transducers 62, 67 Sight glass location 51 76
Troubleshooting 67 Space temperature reset 48 Unit sizes 4
Pre-start-up 51 Space temperature sensor wiring 30 Unit torque specification 59
Pump and manual starters, factory settings Standard chilled fluid temperature control — Voltage 53
127 no reset 49 Winter shutdown 62
Pump performance check 75 Start-up and operation 51-53 Wiring
Re-alarm time 29 Start-up checklist CL-1 Control 13, 15, 17, 19, 21, 23, 25
Recommended minimum cool down time af- Strainer 68 Power 12, 14, 16, 18, 20, 22, 24
ter compressor is stopped 85 System check 51
Remote space temperature sensor 30 Temperature limits 53

© 2023 Carrier

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300229-01 Printed in U.S.A. Form 30RAP-8T Pg 142 3-23 Replaces: 30RAP-7T
 START-UP CHECKLIST FOR 30RAP LIQUID CHILLER
(REMOVE AND USE FOR JOB FILE)

NOTE: To avoid injury to personnel and damage to equipment or property

when completing the procedures listed in this start-up checklist, use good
judgment, follow safe practices, and adhere to the safety considerations/
information as outlined in preceding sections of this Controls, Start-Up,
Operation, Service, and Troubleshooting document.
I. Project Information
Job name ___________________________________________________________________________________
Installing contractor ____________________________________________________________________________
Address _____________________________________________________________________________________
Sales office __________________________________________________________________________________
City ____________________State_____ Zip ______
Start-up performed by __________________________________________________________________________
Unit
Model ______________________________________________________________________________________
Serial ______________________________________
II. Preliminary Equipment Check (To Be Performed By Installing Contractor)
Is there any physical damage? (Y/N) _______
If yes, was it noted on the freight bill, and has a claim been filed with the supplier? (Y/N) _______
DESCRIPTION
Unit is installed level as per the installation instructions. (Y/N) _______
Power supply agrees with the unit nameplate. (Y/N) _______
Electrical power wiring is installed properly. (Y/N) _______
Unit is properly grounded. (Y/N) _______
Electrical circuit protection has been sized and installed properly. (Y/N) _______
All terminals are tight. (Y/N) _______
All plug assemblies are tight. (Y/N) _______
Remove shipping brackets from compressors. (Y/N) _______
Chilled Water System Check (to be performed by installing contractor)
System has been properly cleaned and filled. (Y/N) _______
All chilled water valves are open. (Y/N) _______
All piping is connected properly. (Y/N) _______
All air has been purged from the system. (Y/N) _______
Chilled water pump is operating with the correct rotation. (Y/N) _______
Chilled water pump controlled by chiller. (Y/N) _______
Chilled water pump starter interlocked with chiller. (Y/N) _______
Integrated 40 mesh y strainer clean. (Y/N) _______
Water loop volume greater than minimum requirements. (See Table 30.) (Y/N) _______
Proper loop freeze protection provided to _____ °F (°C). (Y/N) _______ 
Antifreeze type _____________________ concentration __________%.
Cooler Freeze Protection
If outdoor ambient is below 32°F (0°C) then complete the next three items to provide cooler freeze protection to
–20°F (–29°C). (Refer to winter shutdown for proper cooler winterization procedure.)
Glycol concentrations above 30% may require a flow switch recalibration.
Outdoor piping wrapped with electric heater tape, insulated and operational. (Y/N) _______
Cooler heaters installed and operational. (Y/N) _______
Crankcase heaters (if equipped) are securely attached, operational, and energized 
to remove any liquid from the compressor. (Y/N) _______
SIGNATURE REQUIRED
Preliminary start-up complete.
Installing/mechanical contractor _______________________________________ Date____________

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Catalog No. 04-53300229-01 Printed in U.S.A. Form 30RAP-8T Pg CL-1 3-23 Replaces: 30RAP-7T
 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -- - - - - - - - - - - - - - - - - - - -
III. Unit Start-Up (Qualified individuals only. Factory start-up recommended.)
Design Information

CAPACITY CEAT EWT LWT FLUID TYPE FLOW RATE P.D.

1. All cables and thermistors have been inspected for crossed wires. (Y/N) _______
2. All thermistors are fully inserted into wells. (Y/N) _______
3. Compressor oil level is correct. (Y/N) _______
4. Verify crankcase heaters (if equipped) have been energized for 24 hours. (Y/N) _______
5. Verify compressor mounting bolt torque is 7-10 ft-lb (9.5-13.5 n-m). (Y/N) _______
6. Leak check unit. locate, repair and report any refrigerant leaks. (Y/N) _______
7. Voltage is within unit nameplate range. (Y/N) _______
8 Control transformer primary connection set for proper voltage. (Y/N) _______
9. Control transformer secondary voltage =

10. Check voltage imbalance: A-B A-C B-C

CUT ALONG DOTTED LINE

Average Voltage = (A-B + A-C + B-C)/3
Maximum Deviation From Average Voltage =
Voltage Imbalance = ____________% (Max. Deviation/average Voltage) X
100
Voltage Imbalance Less Than 2%.  YES  NO
(Do not start chiller if voltage imbalance is greater than 2%. Contact local utility for assistance.)

11. Verify cooler flow rate.  YES  NO

Pressure Entering Cooler ________ psig (kPa)
Pressure Leaving Cooler ________ psig (kPa)
Cooler Pressure Drop ________ psig (kPa)
Psig X 2.31 ft/psi = ________ ft of water
kPa X 0.334 m/psi ________ m of water
Cooler Flow Rate ________ gpm (l/s)
(See Cooler Pressure Drop Curves from Installation Instructions)

12. Flow switch operation checked.  YES  NO

Start and Operate Machine. Complete the Following:

CUT ALONG DOTTED LINE

1. Complete component test.  YES  NO

2. Check refrigerant and oil charge.  YES  NO

3. Record compressor motor current.  YES  NO

4. Record configuration settings.  YES  NO

5. Record operating temperatures and pressures.  YES  NO

6. Provide operating instructions to owner’s personnel. Instruction Time ________ hours.

CL-2
III. Unit Start-Up (cont)
Operating Data:
Record the following information from the pressures and temperatures modes when machine is in a stable operat-
ing condition:
Pressure/Temperature
CIRCUIT A CIRCUIT B
DISCHARGE PRESSURE DP.A DP.B
SUCTION PRESSURE SP.A SP.B
SATURATED CONDENSING TEMP SCT.A SCT.B
SATURATED SUCTION TEMP SST.A SST.B
RETURN GAS TEMPERATURE RGT.A RGT.B
LIQUID LINE TEMPERATURE*
DISCHARGE LINE TEMPERATURE*
*Readings taken with a digital thermometer.

COOLER EWT EWT

COOLER LWT LWT
OUTDOOR-AIR TEMPERATURE OAT
CONTROL POINT CTPT
PERCENT TOTAL CAPACITY CAP
LEAD/LAG LEAVING FLUID DLWT (DUAL CHILLER CONTROL ONLY)

Compressor Running Current — All readings taken at full load.

COMPRESSOR MOTOR CURRENT L1 L2 L3
COMPRESSOR A1
COMPRESSOR A2
COMPRESSOR A3
COMPRESSOR B1
COMPRESSOR B2
COMPRESSOR B3

CONDENSER FAN MOTOR CURRENT L1 L2 L3

FAN MOTOR 1
FAN MOTOR 2
FAN MOTOR 3
FAN MOTOR 4
FAN MOTOR 5
FAN MOTOR 6
FAN MOTOR 7
FAN MOTOR 8
FAN MOTOR 9
FAN MOTOR 10

COOLER PUMP MOTOR CURRENT L1 L2 L3

COOLER PUMP 1
COOLER PUMP 2

RECORD SOFTWARE VERSIONS

MODE — RUN STATUS
Press Enter and Escape keys simultaneously to obtain software versions.

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

MBB CESR-131460- _ _-_ _
EXV CESR-131172- _ _-_ _
AUX1 CESR-131333- _ _-_ _
VERS EMM CESR-131174- _ _-_ _
MARQ CESR-131171- _ _-_ _
NAVI CESR-131227- _ _-_ _
CXB CESR-131173- _ _-_ _

CL-3
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III. Unit Start-Up (cont)

Press Escape key to display “UNIT.” Record configuration settings below.

UNIT (Configuration Settings)

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

UNIT CONFIGURATION
SIZE UNIT SIZE XXX
SZA.1 COMPRESSOR A1 SIZE XX TONS
SZA.2 COMPRESSOR A2 SIZE XX TONS
SZA.3 COMPRESSOR A3 SIZE XX TONS
SZB.1 COMPRESSOR B1 SIZE XX TONS
SZB.2 COMPRESSOR B2 SIZE XX TONS
SZB.3 COMPRESSOR B3 SIZE XX TONS
UNIT
SH.SP SUPERHEAT SETPOINT XX.X F

CUT ALONG DOTTED LINE

FAN.S FAN STAGING SELECT XX
EXV EXV MODULE INSTALLED YES/NO
A1.TY COMPRESSOR A1 DIGITAL? YES/NO
MAX.T MAXIMUM A1 UNLOAD TIME XX SEC
FN.SQ CONDFAN SEQ FOR SSN 2214 YES/NO
VLTS UNIT VOLTAGE XXX
F.POL NUM POLES IN FAN X

Press Escape key to display “UNIT.” Press down arrow key to display “OPT1”.
Press Enter key. Record configuration information below.

OPTIONS1 (Options Configuration)

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

CUT ALONG DOTTED LINE

UNIT OPTIONS 1 HARDWARE
FLUD COOLER FLUID X
MLV.S MINIMUM LOAD VALVE SELECT YES/NO
CSB.E CSB BOARDS ENABLE ENBL/DSBL
CPC COOLER PUMP CONTROL ON/OFF
PM1E COOLER PUMP 1 ENABLE YES/NO
PM2E COOLER PUMP 2 ENABLE YES/NO
PM.P.S COOLER PMP PERIODIC STRT YES/NO
PM.SL COOLER PUMP SELECT X
OPT1 PM.DY COOLER PUMP SHUTDOWN DLY XX MIN
PM.DT PUMP CHANGEOVER HOURS XXXX HRS
ROT.P ROTATE COOLER PUMPS NOW YES/NO
PMP.O COOLER PUMP OPERATION X
PM.HT PUMP HIGH TEMP CUT OFF XX.XF
EMM EMM MODULE INSTALLED YES/NO
CND.T CND HX TYP 0=RTPF 1=MCHX 0/1
MOPS EXV MOP SET POINT XX
APPR CONFIG APPROACH SETPOINT XX
EXV.T EXV Type X

CL-4
III. Unit Start-Up (cont)

Press Escape key to display “OPT1”. Press down arrow key to display “OPT2”.
Press Enter KEY.
Record configuration information below.

OPTIONS2 (Options Configuration)

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

UNIT OPTIONS 2 CONTROLS
CTRL CONTROL METHOD X
LOAD LOADING SEQUENCE SELECT X
LLCS LEAD/LAG CIRCUIT SELECT X
LCWT HIGH LCW ALERT LIMIT XX.X F
DELY MINUTES OFF TIME XX
OPT2 ICE.M ICE MODE ENABLE ENBL/DSBL
LS.MD LOW SOUND MODE SELECT X
LS.ST LOW SOUND START TIME 00:00
LS.ND LOW SOUND END TIME 00:00
LS.LT LOW SOUND CAPACITY LIMIT XXX %
ALR.C ALARM RELAY USAGE X
SER.T SERVICE TRIO ENABLE ENBL/DSBL

Press Escape key to display “OPT2”. Press down arrow key to display “CCN”.
Press Enter key.
Record configuration information below.
CCN (CCN Network Configuration)

SUB-MODE ITEM ITEM EXPANSION DISPLAY ENTRY

CCNA CCN ADDRESS XXX
CCN CCNB CCN BUS NUMBER XXX
BAUD CCN BAUD RATE X

CL-5
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III. Unit Start-Up (cont)

Press Escape key to display “CCN”. Press down arrow key to display “EXV.A”.
Press Enter key.
Record configuration information below.
EXV.A (Circuit A EXV Configuration)

SUB-MODE ITEM ITEM EXPANSION DISPLAY ENTRY

EXV.L EXV OPENING AT LOW LWT XX%
LWT.L LWT FOR EXV MIN OPENING XX°F

EXV.H EXV OPENING AT HIGH LWT XX%

LWT.H LWT FOR EXV MAX OPENING XX°F

MIN.A EXV CIRC.A MIN POSITION XXX.X%

RNG.A EXVA STEPS IN RANGE XXXXX

CUT ALONG DOTTED LINE

SPD.A EXVA STEPS PER SECOND XXXXX

POF.A EXVA FAIL POSITION IN% X.XX%

MIN.A EXVA MINIMUM STEPS XXXXX

MAX.A EXVA MAXIMUM STEPS XXXXX

OVR.A EXVA OVERRUN STEPS XXX.X%

EXV.A A.ST.P EXV CIRC A START POS XXX.X%

TYP.A EXVA STEPPER TYPE 0,1

H.SCT HIGH SCT THRESHOLD XXX.X°F

X.PCT OPEN EXV X% ON 2ND COMP XX.X%

X.PER MOVE EXV X% ON DISCRSOL XX.X%

A.PCT PRE-OPEN EXV - FAN ADDING XXX.X%

M.PCT PRE-CLOSE EXV - FAN SUB XXX.X%

S.PCT PRE-CLOSE EXV - LAG SHUT XXX SEC

DELY LAG START DELAY XXX SEC

L.DL.T LOW SH DELTA T - EXV MOVE XXX SEC

CUT ALONG DOTTED LINE

SHR.T EXV RATE THRESHOLD XX.X F

L.EX.M LOW SH OVERRIDE EXV MOVE X.X%

Press Escape key to display “EXV.A”. Press down arrow key to display “EXV.B”.
Press Enter key.
Record configuration information below.
EXV.B (Circuit B EXV Configuration)

SUB-MODE ITEM ITEM EXPANSION DISPLAY ENTRY

MIN.B EXV CIRC.B MIN POSITION XXX.X%
RNG.B EXVB STEPS IN RANGE XXXXX STEP
SPD.B EXVB STEPS PER SECOND XXXXX
POF.B EXVB FAIL POSITION IN % XXX.X%
EXV.B
MIN.B EXVB MINIMUM STEPS XXXXX STEP
MAX.B EXVB MAXIMUM STEPS XXXXX STEP
OVR.B EXVB OVERRUN STEPS XXX STEP
TYP.B EXVB STEPPER TYPE 0,1

CL-6
III. Unit Start-Up (cont)

Press Escape key to display “EXV.B”. Press down arrow key to display “MM”.
Press Enter KEY.
Record configuration information below.

MM (Motormaster Configuration Settings)

SUB-MODE ITEM ITEM EXPANSION DISPLAY ENTRY

MMR.S MOTORMASTER SELECT X
P.GAN HEAD PRESSURE P GAIN XX.X
MM I.GAN HEAD PRESSURE I GAIN XX.X
D.GAN HEAD PRESSURE D GAIN XX.X
MIN.S MINIMUM FAN SPEED XXX.X%

Press Escape key to display “MM”. Press down arrow key to display “RSET”.
Press Enter key.
Record configuration information below.

RSET (Reset Configuration Settings)

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

RESET COOL TEMP
CRST COOLING RESET TYPE X
MA.DG 4-20 - DEGREES RESET XX.X ΔF
RM.NO REMOTE - NO RESET TEMP XXX.X°F
RM.F REMOTE - FULL RESET TEMP XXX.X°F
RM.DG REMOTE - DEGREES RESET XX.X ΔF
RT.NO RETURN - NO RESET TEMP XXX.X ΔF
RT.F RETURN - FULL RESET TEMP XXX.X ΔF
RT.DG RETURN - DEGREES RESET XX.X ΔF
DMDC DEMAND LIMIT SELECT X
DM20 DEMAND LIMIT AT 20 MA XXX %
RSET SHNM LOADSHED GROUP NUMBER XXX
SHDL LOADSHED DEMAND DELTA XXX %
SHTM MAXIMUM LOADSHED TIME XXX MIN
DLS1 DEMAND LIMIT SWITCH 1 XXX.X %
DLS2 DEMAND LIMIT SWITCH 2 XXX.X %
LLEN LEAD/LAG CHILLER ENABLE ENBL/DSBL
MSSL MASTER/SLAVE SELECT SLVE/MAST
SLVA SLAVE ADDRESS XXX
LLBL LEAD/LAG BALANCE SELECT X
LLBD LEAD/LAG BALANCE DELTA XXX HRS
LLDY LAG START DELAY XXX MIN
PARA PARALLEL CONFIGURATION YES/NO

CL-7
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III. Unit Start-Up (cont)

Press Escape key to display “RSET”. Press down arrow key to display “SLCT”.
Press Enter key.
Record configuration information below:

SLCT (Setpoint and Ramp Load Configuration)

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

SETPOINT AND RAMP LOAD
CLSP COOLING SETPOINT SELECT X
RL.S RAMP LOAD SELECT ENBL/DSBL
SLCT
CRMP COOLING RAMP LOADING X.X°F
SCHD SCHEDULE NUMBER XX
Z.GN DEADBAND MULTIPLIER X.X

CUT ALONG DOTTED LINE

Press Escape key several times to get to the mode level (blank display). 
Use the arrow keys to scroll to the set point LED. Press Enter to display setpoints.
Record configuration information below:

SETPOINT

SUBMODE ITEM ITEM EXPANSION DISPLAY ENTRY

COOLING SETPOINTS
CSP.1 COOLING SETPOINT 1 XXX.X°F
COOL
CSP.2 COOLING SETPOINT 2 XXX.X°F
CSP.3 ICE SETPOINT XXX.X°F
HEAD PRESSURE SETPOINTS
H.DP HEAD SET POINT XXX.X°F
F.ON FAN ON SET POINT XXX.X°F
HEAD
F.OFF FAN OFF SET POINT XXX.X°F

CUT ALONG DOTTED LINE

B.OFF BASE FAN OFF DELTA TEMP XX.X°F
F.DLT FAN STAGE DELTA XX.X ΔF
BRINE FREEZE SETPOINT
FRZ
BR.FZ BRINE FREEZE POINT XXX.X°F

CL-8
III. Unit Start-Up (cont)

Component Test
Use Escape/arrow keys to illuminate configuration led. Press Enter to display “DISP”. Press Enter again to dis-
play “TEST” followed by “OFF”. Press Enter to stop display at “OFF” and enter again so “OFF” display flashes.
“PASS” and “WORD” will flash if password needs to be entered. Press Enter to display password field and use
the Enter key for each of the four password digits. Use arrow keys if password is other than standard. At flashing
“OFF” display, press the up-arrow key to display “ON” and press Enter. All LED segments and mode LEDs will
light up. Press Escape to stop the test. Press Escape to return to the “DISP” display. Press the Escape key again
and use the arrow keys to illuminate the service test LED. Press Enter to display “TEST”. Press Enter to stop dis-
play at “OFF” and enter again so “OFF” flashes. Press the up-arrow key and Enter to enable the manual mode.
Press Escape and display now says “TEST” “ON”. Refer to the table below.
Service Test Mode and Sub-Mode Directory
KEYPAD ITEM COMPLETED
SUB-MODE ENTRY ITEM DISPLAY EXPANSION COMMENT (YES/NO)
ON/OFF SERVICE TEST MODE To Enable Service Test Mode, move
ENTER Enable/Off/Remote Control switch to
TEST OFF. Change TEST to ON. Move
switch to ENABLE.
OUTS OUTPUTS AND PUMPS
ENTER
EXV.A xxx% EXV% OPEN

EXV.B xxx% EXV% OPEN

FAN1 ON/OFF FAN 1 RELAY Condenser fan contactor 1

FAN2 ON/OFF FAN 2 RELAY Condenser fan contactor 2

FAN3 ON/OFF FAN 3 RELAY Condenser fan contactor 3

FAN4 ON/OFF FAN 4 RELAY Condenser fan contactor 4

FAN5 ON/OFF FAN 5 RELAY Condenser fan contactor 5

FAN6 ON/OFF FAN 6 RELAY Condenser fan contactor 6

FAN7 ON/OFF FAN 7 RELAY Condenser fan contactor 7

FAN8 ON/OFF FAN 8 RELAY Condenser fan contactor 8

V.HPA xx VAR HEAD PRESS% CIRCUIT A

V.HPB xx VAR HEAD PRESS% CIRCUIT B

CLP.1 ON/OFF COOLER PUMP RELAY 1

CLP.2 ON/OFF COOLER PUMP RELAY 2

COMPRESSOR A1 LOAD Digital Scroll option only

DIG.P xxx
PERCENT

CL.HT ON/OFF COOLER/PUMP HEATER

CCH.A ON/OFF CRANKCASE HEATER CIRCUIT A

CCH.B ON/OFF CRANKCASE HEATER CIRCUIT B

RMT.A ON/OFF REMOTE ALARM RELAY

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the
display.

CL-9
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III. Unit Start-Up (cont)

Service Test Mode and Sub-Mode Directory (cont)

KEYPAD ITEM COMPLETED
SUB-MODE ITEM DISPLAY COMMENT
ENTRY EXPANSION (YES/NO)
CIRCUIT A COMPRESSOR TEST
ENTER CC.A1 ON/OFF COMPRESSOR A1 RELAY

DIG.P XXX% COMP A1 UNLOAD PERCENT Digital Scroll option only

CMPA
CC.A2 ON/OFF COMPRESSOR A2 RELAY

CC.A3 ON/OFF COMPRESSOR A3 RELAY

MLV ON/OFF MINIMUM LOAD VALVE RELAY

CIRCUIT B COMPRESSOR TEST

ENTER CC.B1 ON/OFF COMPRESSOR B1 RELAY See Note
CMPB CC.B2 ON/OFF COMPRESSOR B2 RELAY See Note

CUT ALONG DOTTED LINE

CC.B3 ON/OFF COMPRESSOR B3 RELAY See Note

NOTE: If the unit has a single circuit, the Circuit B items will not appear in the display.

CUT ALONG DOTTED LINE

CL-10
COMMENTS:

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________________________________________________________________________________________

________________________________________________________________________________________

________________________________________________________________________________________

SIGNATURES:

START-UP CUSTOMER
TECHNICIAN ____________________________ REPRESENTATIVE ____________________________

DATE ___________________________________ DATE________________________________________

CL-11
 © 2023 Carrier

Catalog No. 04-53300229-01 Printed in U.S.A. Form 30RAP-8T Pg CL-12 3-23

Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Replaces: 30RAP-7T
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CUT ALONG DOTTED LINE CUT ALONG DOTTED LINE