12

MENU
ITEM STATUS TEMP PRESSURES SETPOINTS INPUTS OUTPUTS CONFIG ALARMS ALARMS HIST RUNTIMES
0 Default display Evaporator water Discharge pressure, Cooling setpoint 1 Contact 1: remote on/off SUB-MENU: SUB-MENU: Number of active Historic alarm code 1 SUB-MENU:
entering temp. circuit A Outputs 1 User Configuration alarms/resets Runtimes
[OUTPUTS1] [USEr]
1 Active modes Evaporator water Suction pressure, Cooling setpoint 2 Contact 2: remote SUB-MENU: SUB-MENU: Active alarm code 1** Historic alarm code 2 SUB-MENU:
leaving temp. circuit A setpoint Outputs 2 Service Configuration Maintenance
4.5 - Menu tree structure

[OUTPUTS2] [SErviCE]
2 Chiller occupied/ Condenser water Oil pressure, Heating setpoint Contact 3: remote - SUB-MENU: Active alarm code 2** Historic alarm code 3 -
unoccupied entering temperature compressor A1 heating/cooling Factory Configuration
[FACtorY]
3 Minutes left Condenser water Oil pressure, Condensing setpoint Contact 4: remote heat - - Active alarm code 3** Historic alarm code 4 -
leaving temperature compressor A2 reclaim operation
4 Cooling/heating Heat reclaim water Oil differential pressure, Heat reclaim setpoint Demand limit selection - - Active alarm code 4** Historic alarm code 5 -
selection entering temperature compressor A1
5 Heat reclaim selection Heat reclaim water Oil differential pressure, Demand limit Water flow control and - - Active alarm code 5** Historic alarm code 6 -
leaving temperature compressor A2 setpoint in % customer interlock
6 Unit capacity in % Saturated discharge Economizer A1 Cooling mode ramp Evaporator pump fault - - - Historic alarm code 7 -
temperature, circuit A pressure detection
7 Capacity circuit A in % Saturated suction Economizer A2 Heating mode ramp Water flow control, - - - Historic alarm code 8 -
temperature, circuit A pressure condenser
8 Capacity circuit B in % Gas discharge Discharge pressure, Cooling - threshold Control box thermostat - - - Historic alarm code 9 -
temperature, circuit A circuit B for zero reset and phase reversal
interlock control
9 Present demand limit Discharge superheat, Suction pressure, Cooling - threshold Oil level, circuit A - - - Historic alarm code 10 -
in % circuit A circuit B for max. reset
10 Present lag limit in % Temperature motor A1 Oil pressure, Cooling - max. reset Oil level, circuit B - - - - -
compressor B1 value
11 Setpoint in local Temperature motor A2 Oil pressure, Heating - threshold External 0-10 V d.c. signal - - - - -
control compressor B2 for zero reset
12 Setpoint occupied/ Saturated discharge Oil differential pressure, Heating - threshold Compressor current A1 - - - - -
unoccupied mode temperature, circuit B compressor B1 for max. reset
13 Active setpoint Saturated suction Oil differential pressure, Heating - max. reset Compressor current A2 - - - - -
temperature, circuit B compressor B2 value
14 Control point Gas discharge Economizer B1 - Compressor current B1 - - - - -
temperature, circuit B pressure
15 Controlled water Discharge superheat, Economizer B2 - Compressor current B2 - - - - -
temperature circuit B pressure
16 Condensing point Temperature motor B1 Remote discharge - Total compressor - - - - -
pressure, circuit A operating current
17 Heat reclaim indicator, Temperature motor B2 Remote discharge - - - - - - -
circuit A pressure, circuit B
18 Heat reclaim indicator, Outdoor temperature Heat reclaim pressure, - - - - - - -
circuit B circuit A
19 - Water loop Heat reclaim pressure, - - - - - - -
temperature, master/ circuit B
slave assembly
NOTE: The items in brackets show what is displayed on the user interface. ** Displayed if the alarm exists
- Not in use
4.5.1 - Description of the Information menu
INFORMATION MENU (3)
ITEM FORMAT UNITS DESCRIPTION
0 Automatic display mode. It cycles through the following displays:

±nn.n °C 1: Controlled water temperature: temperature of the water that the unit tries to maintain at the control point.
2: Unit operating type
LOFF - Local Off
L-On - Local On
L-Sc - Local On - based on unit clock.
CCn - CCN Control.
rEM - Remote Control
MASt - Master unit
3: Unit status
OFF - Off: Unit is stopped and not authorised to start.
rEADY - Ready: Unit is authorised to start
dELAY - Delay: Unit is in delay at start-up. This delay is active after the unit has been switched on. The delay can be
configured in the User Configuration menu.
StOPPing - Stopping: Unit is currently stopping.
running - On: Unit is running or authorised to start.
triPout - Fault shutdown.
OvErridE - Limit: The operating conditions do not allow total unit operation.
4. Unit occupied/unoccupied status
OCCUPIEd - Occupied: Unit in occupied mode
UNOCCUPIEd - Unoccupied: Unit in unoccupied mode
5. Heating/cooling operating mode
COOL - Cooling: Unit operates in cooling mode
HEAT - Heating: Unit operates in heating mode
rECLAIM - Cooling: Unit is in auto cooling and heat reclaim demand is active
6. Alarm mode
ALArM - Alarm: Unit is totally stopped because of failure.
ALErt - Alert: Unit is in failure but not completely stopped.
7. Master/Slave status
MAStEr - Master: The master/slave control is active and the unit is the master
SLAvE - Slave: The master/slave control is active and the unit is the slave
1 [1] nn - Active mode codes. Each active mode is displayed in turn. This Item is masked when nil. Pressing the enter button when a mode
code is displayed causes a character text expansion to be scrolled accross the four-digit display. See the description in the following
table

2 [2] - This item indicates the current chiller occupied/unoccupied mode.

occu Occupied
unoc Unoccupied
Forc The value is displayed in turn with ‘Forc’ when the unit is in CCN control and if this variable if forced through CCN.
3 nn.n minutes Start-up delay. This item indicates the minutes left before the unit can be started. This delay at start-up is always active after the
unit has been switched on. The delay can be configured in the User Configuration 1 menu.
4 [2] - Heating/cooling on selection: This item is accessible in read/write, if the unit is in local control mode. It is only displayed, if the unit
is in LOFF, L-On or L-Sc operating type. Displayed for heat pumps.
HEAt - Heating mode selection
COOL - Cooling mode selection
5 [2] Heat reclaim mode selection: This item is accessible in read/write, if the unit is in local control mode. It is only displayed, if the unit
is in LOFF, L-On or L-Sc operating type. Displayed for air-cooled or water-cooled units with a condenser water valve.
YES - Heat reclaim mode selection, use of heat reclaim condensing setpoint.
NO - Normal cooling mode selection, use of standard condensing setpoint
6 Nnn % Total active capacity of unit.
7 nnn % Total active capacity of circuit A.
8 [2] nnn % Total active capacity of circuit B.
9 [2] nnn Present demand limit. This is the authorised operating capacity of the unit. See section 5.8.
Forc % The value is displayed in turn with ‘Forc’ when the unit is in CCN control and if this variable if forced through CCN.
10 nnn % Present lag chiller demand limit. Displayed when the master/slave control is selected.
11 [2] - Setpoint select in local mode. This point is read/write accessible. Displayed only when the unit is LOFF, L-On or L-Sc operating type.
SP-1 SP-1 = cooling setpoint 1
SP-2 SP-2 = cooling setpoint 2
AUtO AUtO = active setpoint depends on schedule 2 (setpoint selection schedule). See section 5.7.1 & 4.5.7.6.
12 [2] - Setpoint occupied mode.
occu Occupied: cooling setpoint 1 is active
unoc Unoccupied: cooling setpoint 2 is active
Forc The value shall be displayed in turn with ‘Forc’ when the unit is in CCN control and if this variable if forced through CCN.
13 ±nn.n °C Active setpoint. This is the current cooling/heating setpoint: it refers to cooling/heating setpoint 1 or 2.
14 ±nn.n Control point. This is the setpoint used by the controller to adjust the temperature of the leaving or entering water (according to
Forc °C configuration).
Control point = active setpoint + reset. See section 5.7
The value is displayed in turn with ‘Forc’ when the unit is in CCN control and if this variable if forced through CCN.
15 ±nn.n °C Controlled water temperature. Water temperature that the unit tries to maintain at the control point.
16 ±nn.n °C Condensing setpoint. The value is displayed in turn with ‘Forc’ if the unit is in CCN mode and this parameter is forced by CCN.
Forc °C
17 n Heat reclaim function indicator, circuit A (see heat reclaim section)
18 n Heat reclaim function indicator, circuit B (see heat reclaim section)
Legend
1 This item is masked when nil.
2 This item is displayed in certain unit configurations only.
3 Access to this menu is read-only except for item 10 that can be forced when the unit is in Local operating type.

13
DESCRIPTION OF OPERATING MODES (ITEM 1 OF THE INFORMATION MENU)
MODE # MODE NAME DESCRIPTION
7 Delay at start-up active The delay at start-up operates after the unit has been switched on. If the delay has not expired, the mode is active.
The delay is configured in the User1 configuration menu.
8 2nd cooling setpoint active The second cooling setpoint is active. See section 5.7.1
9 Setpoint reset active In this mode, the unit uses the reset function to adjust the leaving or entering water temperature setpoint. See
section 5.7.2.
10 Demand limit active In this mode, the capacity at which the unit is allowed to operate is limited. See section 5.8.
11 Ramp loading active Ramp loading is active. In this mode, the controlled high or low water temperature value (in °C/min) in heating mode
is limited to a preset value in order to prevent compressor overload. The ramp function must be configured (see
User1 configuration menu). The ramp values can be modified (see setpoint menu).
12 Low entering water temperature The unit is in heating mode and the temperature of the evaporator leaving water is lower than the lesser of the two
protection in heating mode cooling setpoints. A capacity stage is removed. This mode only applies to heat pumps.
13,14 Low suction temperature protection 13 = circuit A & 14 = circuit B. Protection for evaporator suction low temperature circuit is active. In this mode,
circuit capacity is not authorised to rise if the unit is in cooling mode, and saturated suction temperature in the
circuit is lower than the frost protection threshold.
15,16 Low discharge superheat protection 15 = circuit A & 16 = circuit B.
In this mode the circuit capacity is not authorised to rise.
17,18 High pressure protection 17 = circuit A & 18 = circuit B. The circuit is in high pressure protection mode because the HP protection threshold
has been exceeded. The circuit capacity is not authorised to rise and any slave compressor can be stopped in
order to prevent a high pressure break.
19,20 High current protection 19 = circuit A & 20 = circuit B. Circuit capacity is not allowed to rise, as the compressor has reached the high
current protection threshold and could be shut down.
21 Heat reclaim active Circuit A or circuit B operates in heat reclaim mode and not in standard cooling mode (pumpdown phase is activated).
22 Evaporator heater active Mode active if risk of frost exists.
23 Evaporator pump reversal active Two evaporator water pumps installed on the unit and pump reversal is active. See section 5.3
24 Periodic evaporator pump start-up The unit is shut down and is started every day at 14:00 hours for 2 seconds. This function must be configured in the
User1 menu. See sections 5.3 and 4.5.7.3.
25 Low night-time capacity Unit capacity is limited. The period when this mode starts, as well as the limited capacity in night-time mode are
controlled in Costomer 1 menu.
26 Unit under SM control Unit is under control of a System Manager (FSM or CSM III).
27 Master/slave link active Unit is connected to a secondary unit by a master slave link and either:
- the unit is configured as a master and this master is operating, or
- the unit is configured as a slave and this slave is operating.

4.5.2 - Description of the Temperatures menu 4.5.3 - Description of the Pressures menu

TEMPERATURES MENU [2] PRESSURES MENU [2]

ITEM FORMAT UNITS COMMENTS ITEM FORMAT UNITS COMMENTS
0 ±nn.n °C Evaporator entering water temperature 0 nnnn kPa Discharge pressure circuit A
1 ±nn.n °C Evaporator leaving water temperature 1 nnnn kPa Suction pressure circuit A
2[1] ±nn.n °C Condenser entering water temperature 2 nnnn kPa Oil pressure compressor A1
3[1] ±nn.n °C Condenser leaving water temperature 3[1] nnnn kPa Oil pressure compressor A2
4[1] ±nn.n °C Reclaim condenser entering water temperature 4 nnnn kPa Differential oil pressure compressor A1
5[1] ±nn.n °C Reclaim condenser leaving water temperature 5[1] nnnn kPa Differential oil pressure compressor A2
6 ±nn.n °C Saturated discharge temperature circuit A 6 nnnn kPa Economizer pressure A1
7 ±nn.n °C Saturated suction temperature circuit A 7[1] nnnn kPa Economizer pressure A2
8 ±nn.n °C Discharge gas temperature circuit A 8 nnnn kPa Discharge pressure circuit B
9 ±nn.n °C Discharge superheat temperature circuit A 9 nnnn kPa Suction pressure circuit B
10 ±nn.n °C Motor temperature A1 10 nnnn kPa Oil pressure compressor B1
11[1] ±nn.n °C Motor temperature A2 11[1] nnnn kPa Oil pressure compressor B2
12 ±nn.n °C Saturated discharge temperature circuit B 12 nnnn kPa Differential oil pressure compressor B1
13 ±nn.n °C Saturated suction temperature circuit B 13[1] nnnn kPa Differential oil pressure compressor B2
14 ±nn.n °C Discharge gas temperature circuit B 14 nnnn kPa Economizer pressure B1
15 ±nn.n °C Discharge superheat temperature circuit B 15[1] nnnn kPa Economizer pressure B2
16 ±nn.n °C Motor temperature B1 16[1] nnnn kPa Remote discharge pressure, circuit A
17[1] ±nn.n °C Motor temperature B2 17[1] nnnn kPa Remote discharge pressure, circuit B
18 ±nn.n °C Outdoor temperature 18[1] nnnn kPa Pumpdown pressure, heat reclaim, circuit A
19[1] ±nn.n °C Water loop temperature, master/slave assembly 19[1] nnnn kPa Pumpdown pressure, heat reclaim, circuit B
Legend Legend
1 This item is displayed in certain unit configurations only 1 This item is displayed in certain unit configurations only.
2 Access to this menu is read-only. 2 Access to this menu is read-only

14
4.5.4 - Description of the Setpoints menu

SETPOINTS MENU [2]

ITEM FORMAT UNITS RANGE COMMENTS
0 ±nn.n °C See table below This item lets you display and modify Cooling setpoint 1*
1 ±nn.n °C See table below This item lets you display and modify Cooling setpoint 2*
2 nnn °C See table below This item lets you display and modify Heating setpoint*, only displayed for heat pumps.
3 [1] nnn °C See table below This item lets you display and modify the condensing setpoint*. It is used by the control to regulate the
fan stages or a variable-speed fan (air-cooled units) or the condenser water valve control (water-cooled
units), if the unit is not in heat reclaim mode.
4 [1] nnn °C See table below This item lets you display and modify the heat reclaim setpoint*. As item 3, this is used for condensing
setpoint control.
5 nnn % 0 to 100 Capacity limit setpoint. Limitation by volt-free contact. This item is used to define the maximum
capacity that the unit is authorised to use, if the capacity limit contact activate the limit. See section 5.8.
6 [1] ±nn.n °C/min 0.1 to 1.1 Cooling ramp loading rate. This parameter is only accessible if the ramp function is validated in the User
Configuration 1 menu. This item refers to the maximum rate of temperature rise in °C in the water heat
exchanger in cooling mode. When capacity loading is effectively limited by the ramp, mode 11 is active.
7 [1] ±nn.n °C/min 0.1 to 1.1 Heating ramp loading rate. This parameter is only accessible if the ramp function is validated in the User
Configuration 1 menu. This item refers to the maximum rate of temperature drop in °C in the water heat
exchanger in heating mode. When capacity loading is effectively limited by the ramp, mode 11 is active.
8 [1] ±nn.n [3] See table below Zero reset threshold, cooling mode**
9 [1] ±nn.n [3] See table below Full reset threshold, cooling mode**
10 [1] ±nn.n °C See table below Full reset value, cooling mode**
11 [1] ±nn.n [3] See table below Zero reset threshold, heating mode**
12 [1] ±nn.n [3] See table below Full reset threshold, heating mode**
13 [1] ±nn.n °C -16 to 16 Full reset value, heating mode**

Legend
1 This item is displayed in certain unit configurations only.
2 All points contained in this table can be modified.
* Those setpoints can be used for entering or leaving water temperature control. By default the unit controls the evaporator entering fluid temperature.
Leaving fluid temperature control requires a parameter modification in the Service Configuration menu.
** These parameters are only accessible when reset based on OAT or delta T has been selected in the User Configuration 1 menu. See section 4.5.7.3.

Setpoint description control for control for

leaving water entering water
Cooling Minimum setpoint
- Water 3.3°C 9.3°C
- Medium Brine -10°C -4°C
- Low Brine -20°C -14°C
Maximum setpoint
Heating* Maximum setpoint MCT - 4.0 K MCT - 10.0 K

Note:
Three setpoint reset configuration modes can be selected in the Customer 1
menu:
1 Reset using an external 0-10 V d.c. signal
2 Reset using Delta T
3 Reset by external temperature sensor (air-cooled units only)
The items with zero reset or maximum reset are based on these three modes.
* MCT = Maximum Condensing Temperature (depending on the application)

15
4.5.5 - Description of the Inputs menu

INPUTS MENU [2]

ITEM FORMAT UNITS COMMENTS
0 OPEn/CLoS - Remote contact 1 status
This contact is used to start (contact closed) and stop (contact open) the chiller. It is only valid, if the unit is in the remote operating
control (rEM) mode.
1 OPEn/CLoS - Remote contact 2 status
This contact is used to select a cooling only setpoint, if the unit is in cooling mode and in the remote operating control (rEM) type.
Contact open = csp1
Contact closed = csp2
2[1] OPEn/CLoS - Remote contact 3 status
This contact is used to select the heating or cooling mode, only if the unit is in the remote operating control type.
Contact open: unit in cooling mode
Contact closed: unit in heating mode
3[3] OPEn/CLoS - Remote contact 4 status
This contact is used to select the second condensing setpoint or the heat reclaim mode (for a heat reclaim unit), only if the unit is
in the remote operating control type.
Contact open = unit uses the normal condensing setpoint and is in normal mode (no heat reclaim)
Contact closed = unit uses the heat reclaim setpoint and is in heat reclaim mode.
4 OPEn/CLoS - Remote contact 5 status*
If this contact is closed, it permits limiting the unit demand, based on the demand limit setpoint, if the demand limit method by
contact has been selected.
5 OPEn/CLoS - Water flow contact status* and customer interlock control
Opening of this contact shuts the unit off or prevents its start-up and generates an alarm. It is used to control the water circulation.
6[1] OPEn/CLoS - Water pump operation status. If the contact opens when the evaporator pump has received a command to operate, this trips a
pump failure alarm.
7[1] OPEn/CLoS - Condenser water flow control. Controls the condenser water circulation.
8[1] OPEn/CLoS - Control box thermostat and phase reversal interlock status. Opening of this contact shuts the unit off or prevents its start-up
and generates an alarm.
9 OPEn/CLoS - Oil level, circuit A
10 OPEn/CLoS - Oil level, circuit B
11 0 - 10 Volts External signal
12 nnn Amp. Compressor A1 current
13[1] nnn Amp. Compressor A2 current
14[1] nnn Amp. Compressor B1 current
15[1] nnn Amp. Compressor B2 current
16 nnnn Amp. Total compressor operating current

Legend
1 This item is displayed in certain unit configurations only
2 Access to this menu is read-only
* Active in all operating types
See section 3.4

16
4.5.6 - Description of the Outputs/Tests menu

4.5.6.1 - General
This menu displays the status of the controller outputs. More-
over, when the machine is fully stopped (LOFF) the outputs
can be activated for manual or automatic tests (the access to the
tests is password controlled).

4.5.6.2 - Menu description

OUTPUTS STATUS AND TESTS MENU [2] [3]
ITEM FORMAT UNITS DESCRIPTION
0 This item returns you to the previous menu.
1 Compressor status
- b1 = compressor A1
- b2 = compressor A2
- b3 = compressor B1
- b4 = compressor B2
The compressor status cannot be forced
2 [1] Loader status
- b1 = loader 1 circuit A
- b2 = loader 2 circuit A
- b3 = loader 1 circuit B
- b4 = loader 2 circuit B
This item permits display of the loader status in circuits A or B. It also permits independent testing. In test mode the direction
arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.
3 [1] tEST Motor cooling valve status/test circuit A
- b1 = main valve compressor A1
- b2 = additional valve or economizer compressor A1
- b3 = main valve compressor A2
- b4 = additional valve or economizer compressor A2
This item permits display of the motor cooling valve status in circuit A. It also permits independent testing. In test mode the
direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.
4 [1] tEST Motor cooling valve status/test circuit B
- b1 = main valve compressor B1
- b2 = additional valve or economizer compressor B1
- b3 = main valve compressor B2
- b4 = additional valve or economizer compressor B2
This item permits display of the motor cooling valve status in circuit B. It also permits independent testing. In test mode the
direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force authorisation of each output.
5 tEST % Motor cooling valve cycle status/test, circuit A
Only for units with economizer
6 tEST % Motor cooling valve cycle status/test, circuit B
Only for units with economizer
7 tESt Oil solenoid valve status/test
- b1 = oil solenoid valve compressor A1
- b2 = oil solenoid valve compressor A2
- b3 = oil solenoid valve compressor B1
- b4 = oil solenoid valve compressor B2
This item permits display of the different compressor valves.
It also permits independent testing. In test mode the direction arrows permit successive display of 0001, 0010, 0100 and 1000,
so as to in turn force authorisation of each output.
8 tESt Refrigerant shut-off valve status/test
Only for units with evaporator heater
- b1 = Shut-off valve, circuit A
b2 = Shut-off valve, circuit B
-
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each heater output.
9 tESt Oil heater output status/test, circuits A and B
- b1 = oil heater, circuit A
- b2 = oil heater, circuit B
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each heater output.
10 tESt Oil pump output status/test, circuits A and B
- b1 = oil pump, circuit A
b2 = oil pump, circuit B
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each oil pump
output.
Legend
1 This item is displayed in certain unit configurations only
2 A test is only possible if the units are in local off mode and if all compressors have stopped
3 The password is only valid for the test. ‘Test’ is displayed during the test, alternating with the item number

17
OUTPUTS STATUS 2 AND TESTS MENU [2] [3]
ITEM FORMAT UNITS DESCRIPTION
0 This item returns you to the previous menu.
1 [1] tESt 0-8 Fan contactor status/test, circuit A
This item permits display of the number of fan stages. It also permits them to be tested in a sequentially. In test mode the
direction arrows permit successive display from 0 to 8, so as to authorise the forcing the outputs.
2 [1] tESt 0-8 Fan contactor status/test, circuit B
This item permits display of the number of fan stages. It also permits them to be tested in a sequentially. In test mode the
direction arrows permit successive display from 0 to 8, so as to authorise the forcing the outputs.
3 tESt Alarm command status/test
- b1 = alarm circuit A
- b2 = alarm circuit B
In test mode the direction arrows permit successive display of 01 and 10, so as to in turn force authorisation of each alarm
output.
4 tESt % EXV position, circuit A
In the test mode the direction arrows permit forcing the valve to its fully open position.
5 tESt % EXV position, circuit B
In the test mode the direction arrows permit forcing the valve to its fully open position.
6 [1] tESt % Variable speed fan, circuit A or condenser water valve position in %
7 [1] tESt % Variable speed fan, circuit B or condenser water valve position in %
8 On - Evaporator water pump No. 1 command status. Not displayed if unit does not control a pump.
Stop - On: the pump operates
tESt - Stop: the pump has stopped
FAIL - Forc: This item is only displayed if the unit is in local off mode (LOFF). Selecting this item permits energising the pump
Good - without delay and for an unlimited period. The pump continues to operate, until any key on the user interface is pressed: it
Forc - is then immediately switched off. If the unit is in CCN control mode, the pump status is displayed alternately with ‘Forc’ if its
status is forced by CCN.
During the test phase, pump supply is energised for 10 seconds only. When the test has finished, the following display
appears:
- Fail: displayed if the test has failed, because the pump is not started
- Good: displayed if the test succeeds
9 On - Evaporator water pump No. 2 command status. Not displayed if unit does not control a pump.
OFF - On: the pump operates
tESt - Stop: the pump has stopped
FAIL - Forc: This item is only displayed if the unit is in local off mode (LOFF). Selecting this item permits energising the pump
Good - without delay and for an unlimited period. The pump continues to operate, until any key on the user interface is pressed: it
Forc - is then immediately switched off. If the unit is in CCN control mode, the pump status is displayed alternately with ‘Forc’ if its
status is forced by CCN.
During the test phase, pump supply is energised for 10 seconds only. When the test has finished, the following display
appears:
- Fail: displayed if the test has failed, because the pump is not started
- Good: displayed if the test succeeds
10On - Condenser pump status/test
OFF - On: the pump operates
tESt Stop: the pump has stopped
FAIL Forc: This item is only displayed if the unit is in local off mode (LOFF). Selecting this item permits energising the pump
Good without delay and for an unlimited period. The pump continues to operate, until any key on the user interface is pressed: it
Forc is then immediately switched off. If the unit is in CCN control mode, the pump status is displayed alternately with ‘Forc’ if its
- status is forced by CCN.
During the test phase, pump supply is energised for 10 seconds only. When the test has finished, the following display
appears:
- Fail: displayed if the test has failed, because the pump is not started
- Good: displayed if the test succeeds
11[1] nn Evaporator heater and heat reclaim condenser status
- b1 = evaporator heater
- b2 = heat reclaim condenser heater
12[1] tESt % Condenser water valve position in heat reclaim mode
13[1] Solenoid valve status/test, heat reclaim function
- b1 = heat reclaim coil shutoff solenoid valve, circuit A
- b2 = heat reclaim coil drain solenoid valve, circuit A
- b3 = heat reclaim coil shutoff solenoid valve, circuit B
- b4 = heat reclaim coil drain solenoid valve, circuit B
In test mode the direction arrows permit successive display of 0001, 0010, 0100 and 1000, so as to in turn force
authorisation of each output.
14 YES Used only for local interface
no Cause all diodes and blocks to light up or flash, to verify that they are operating correctly
tESt
Legend
1 This item is displayed in certain unit configurations only
2 A test is only possible if the units are in local off mode and if all compressors have stopped
3 The password is only valid for the test. ‘Test’ is displayed during the test, alternating with the item number

18
4.5.6.3 - Manual tests 4.5.7.2 - Password
This function allows the user to test the outputs individually, if A password must be entered in order to access the test function
the machine is completely shut down (LOFF). To carry out a or to modify a configuration. It is automatically requested, if
manual test use the arrow keys to access the output to be tested necessary: ‘EntEr PASS’ is displayed on the 4-digit display and
and press the Enter key (longer than 2 seconds) to activate the the configuration menu LED flashes, indicating that the modifi-
modification mode. The password is automatically requested, if cation mode is active. Press the arrow keys until the value ‘11’
it has not previously been verified. The Outputs/Test LED on is displayed on the 4-digit display. Press Enter to validate this.
the user interface begins to flash. Enter the desired test value and The configuration menu LED stops flashing. If the password is
again press Enter to start the test. ‘TESt’ is displayed on the 4- correct, ‘Good’ is displayed. If the password is incorrect,
digit display alternately with the value tested. The Outputs/Test ‘PASS incorrEct’ is displayed. The User password has a default
LED stops flashing. Press the Enter key or an arrow key to stop value of 11.
the test.
This value can be modified through the Service configuration.
4.5.7 - Description of the Configuration menu The password can be entered if the unit is fully stopped, other-
wise ‘ACCES dEniEd’ (access denied) will be displayed on the
4.5.7.1- General 4-digit display. The controller automatically deactivates the
This menu can be used to display and modify all configurations: password after 5 minutes without activity (i.e. no buttons
Factory, Service and User. Only the User Configuration can be pressed) or after powering up.
modified by the end-user. The Factory, Service and master/slave
configurations are not described in this document. A configura-
tion can only be modified if the unit is fully stopped (LOFF).

The menus User 1 [USEr 1] and User 2 [USEr 2] are password-

protected. The other menus are directly accessible, except if
item 6 of the User 1 menu (password for all configurations) has
been validated.

SUB-MENU USER CONFIGURATION

ITEM USER 1 USER 2 DATE SCHEDULE 1 SCHEDULE 2 HOLIDAYS BROADCAST
[USER1] [USER2]* [dAtE]* [ScHEduLE 1 MEnu]* [ScHEduLE 2 MEnu]* [HOLidAy MEnu]* [BrodCASt]*
0 Return to previous Return to previous Return to previous Return to previous Return to previous Return to previous menu Return to previous menu
menu menu* menu menu menu
1 Circuit selection Periodic pump Hour* SUB-MENU: SUB-MENU: SUB-MENU: Broadcast acknowledger
start-up* Period 1 [PErIod 1] Period 1 [PErIod 1] Holidays 1 [HOLidAy 1] selection
2 Circuit capacity Night mode - start Day of the week* SUB-MENU: SUB-MENU: SUB-MENU: Broadcast activation
increase sequence hour* Period 2 [PErIod 2] Period 2 [PErIod 2] Holidays 2 [HOLidAy 2]
3 Ramp selection* Night mode - end Day and month* SUB-MENU: SUB-MENU: SUB-MENU: Outdoor temperature
hour* Period 3 [PErIod 3] Period 3 [PErIod 3] Holidays 3 [HOLidAy 3] broadcast bus
4 Start-up delay* Night mode - Year* SUB-MENU: SUB-MENU: SUB-MENU: Outdoor temperature
demand limit in % Period 4 [PErIod 4] Period 4 [PErIod 4] Holidays 4 [HOLidAy 4] broadcast element
5 Water pump selection Number clock 1* - SUB-MENU: SUB-MENU: SUB-MENU: Start month daylight
Period 5 [PErIod 5] Period 5 [PErIod 5] Holidays 5 [HOLidAy 5] saving time
6 Water pump changover Number clock 2* - SUB-MENU: SUB-MENU: SUB-MENU: Start day daylight saving
delay* Period 6 [PErIod 6] Period 6 [PErIod 6] Holidays 6 [HOLidAy 6] time
7 Automatic reset CCN address * - SUB-MENU: SUB-MENU: SUB-MENU: Start hour daylight
selection* Period 7 [PErIod 7] Period 7 [PErIod 7] Holidays 7 [HOLidAy 7] saving time
8 Demand limit selection CCN bus* - SUB-MENU: SUB-MENU: SUB-MENU: Minutes to add
Period 8 [PErIod 8] Period 8 [PErIod 8] Holidays 8 [HOLidAy 8]
9 Voltage corresponding - - - - SUB-MENU: End month daylight
to 100% of demand Holidays 9 [HOLidAy 9] saving time
limit
10 Voltage corresponding - - - - SUB-MENU: End day daylight saving
to 0% of demand limit Holidays 10 [HOLidAy 10] time
11 Extended display - - - - SUB-MENU: End hour daylight saving
selection Holidays 11 [HOLidAy 11] time
12 Password for all user - - - - SUB-MENU: Minutes to subtract
configurations Holidays 12 [HOLidAy 12]
13 Software version - - - - SUB-MENU: -
number Holidays 13 [HOLidAy 13]
14 Total compressor - - - - SUB-MENU: -
current limit Holidays 14 [HOLidAy 14]
15 - - - - - SUB-MENU: -
Holidays 15 [HOLidAy 15]
16 - - - - - SUB-MENU: -
Holidays 16 [HOLidAy 16]
* Only displayed if configuration requires.

19
4.5.7.3 - Description of the User 1 Configuration sub-menu

USER 1 CONFIGURATION SUB-MENU [2]

ITEM FORMAT UNITS DEFAULT COMMENTS
0 USEr MEnu - - When selected this item authorises return to the previous menu.
1 [1] 0/1/2 0 Lead circuit selection
0 = automatic based on the number of start-ups and the operating hours of each circuit
1 = lead circuit A
2 = lead circuit B
2 [1] 0/1 - 0 Circuit capacity increase sequence
0 = equal charge for both circuits
1 = priority charge on one circuit
3 [1] YES/no - no Ramp loading select. For units with more than one compressor per circuit.
Yes = ramp enabled
No = ramp disabled
This configuration enables the ramp to be activated for heating or cooling (depending on configuration): the
maximum rate (in °C/min) of temperature drop or rise for the heat exchanger water (leaving or entering, upon
configuration). Ramp setting value can be configured in the Setpoint menu.
4 1 to 15 min 1 Delay at start-up. This value is reinitialised after power-up or when both circuits are halted by local, remote
or CCN command. No compressor will be started up until this pause has expired. However, the evaporator
pump command will be activated immediately. The safety lockout loop will not be checked until the pause
has expired.
5 0/1/2/3/4 - 0 Pump sequence select
0 = no pump
1 = one pump only
2 = two pumps with auto rotation
3 = pump #1 manual select
4 = pump #2 manual select
If the auto sequence is selected, the pump change-over occurs when the rotation delay is elapsed. If the
manual sequence is selected then, the selected pump is used in priority. Change-over occurs if one pump
fails.
6 [1] 24 to 3000 hours 48 Pump changeover delay. Displayed if auto pump sequence is selected. This parameter is used for pump
auto-rotation: the control tries to limit the pump run time difference to the pump changeover delay value.
Change-over between pumps occurs when this difference becomes greater than the configured pump
changeover delay.
7 0/1/2/3 - 0 Automatic reset selection. Permits activation of automatic reset type
0 = none
1 = 0-10 V d.c. reference voltage
2 = temperature difference
3 = outdoor temperature
8 0/1/2 - 0 Demand limit selection
0 = demand limit not selected
1 = demand limit by contact
2 = demand limit by external signal 0-10 V d.c.
9 [1] 0 to 10 Volts 0 Voltage corresponding to 100% of the demand limit
10 [1] 0 to 10 Volts 0 Voltage corresponding to 0% of the demand limit
11 «YES/no» - yes Extended menu select
Yes = menu description available
No = menu description not available
This item authorises activating or inhibiting the menu item expanded display.
12 «YES/no» - no Password for all User Configurations
Yes = password required for all User Configurations (Date, Time Schedule, Broadcast)
No = password require for User menu only
When this item is validated, the User Password will be required for all configurations accessible by the User.
13 nn.n - - Software version number
This item shows the number of the software version used by this controller. Access is read only.
14 nnnn Amp 1500 Total compressor current limit
This item is used to set the maximum limit for the total compressor running current (see paragraph “Pro-
Dialog Plus control operations/Limiting the unit running current”)
Legend
1 This item is masked when not used.
2 Access to menu is read/write.

21
4.5.7.4 - Description of the User 2 Configuration sub-menu

USER 1 CONFIGURATION SUB-MENU

ITEM FORMAT UNITS DEFAULT COMMENTS
0 USEr 2 Menu When selected this item authorises return to the previous menu.
1[1] YES/no - no Periodic pump quick-start of the water pump(s)
Yes = the pump is started periodically when the unit is manually stopped.
No = periodic pump start is disabled
When the unit is manually stopped (e.g. during the winter season) the pump is started each day at 14.00
hours for 2 seconds. If two pumps are available, pump #1 is started on odd days and pump #2 on even days.
2 [1] n1n2n3 n4 Night control mode - start time*
00:00 to 23:59 - 00:00 Authorises entering the time of day at which the night control mode starts. During this period the fan runs at
low speed (to reduce fan noise) if permitted by operating conditions, and unit capacity is limited to the
maximum night values.
3 [1] n1n2n3 n4 Night control mode - end time*
00:00 to 23:59 - 00:00 Authorises entering the time of day at which the night control mode ends.
4 [1] 0 to 100 % - Night mode demand limit value.
Authorises configuration of the maximum capacity authorised during the night mode.
5 [1] 0 or 65 to 99 - 0 Schedule 1 clock number (for unit on/off schedule, see section 4.5.7.6).
0 = schedule in local operating mode
65 to 99 = schedule in CCN operating mode
6 [1] 0 or 65 to 99 - 0 Schedule 2 clock number (schedule for setpoint selection, see section 4.5.7.6).
0 = schedule in local operating mode
65 to 99 = schedule in CCN operating mode
7 [1] 1 to 239 - 1 CCN element address.
No two network elements can have the same element number and bus number at the same time.
8 [1] 0 to 239 - 0 CCN bus number.
No two network elements can have the same element number and bus number at the same time.
* n1n2: hours (00 to 23). The first time the Enter button is continuously pressed, the first two characters in the 4-digit display flash so that hours can be adjusted.
n3n4: minutes (00 to 59). Continuous pressing of the Enter key again causes the last two characters to flash so that minutes can be adjusted.

4.5.7.5 - Description of Date and Time configuration sub- 4.5.7.6 - Description of the Time Schedules sub-menus
menu The control provides two timer programs. If the CCN/clock
board is not installed, the two schedules are permanently in
DATE & TIME CONFIGURATION SUB-MENU
occupied mode.
ITEM FORMAT COMMENTS
0 dAtE MEnu When selected this item authorises return to the
previous menu. The first timer program (schedule #1) provides a means to
1 n1n2n3n4 Current time setting. automatically switch the unit from an occupied mode to an
00:00 to 23:59 n1n2: hours (00 to 23). The first time the Enter button is unoccupied mode: the unit is started during occupied periods.
continuously pressed, the first two characters in the
4-digit display flash so that hours can be adjusted.
n3n4: minutes (00 to 59). Continuous pressing of the The second timer program (schedule #2) provides a means to
Enter key again causes the last two characters to automatically switch (when auto mode is selected) the active
flash and minutes can be adjusted.
2 Current day of week setting.
setpoint from an occupied setpoint to an unoccupied setpoint.
«Mon» Monday Cooling or heating setpoint 1 is used during occupied periods.
«tUe» Tuesday Cooling setpoint 2 is used during unoccupied periods. For
«uEd» Wednesday
«tHu» Thursday additional information on setpoint activation see section 5.7.1.
«FrI» Friday
«SAt» Saturday
«Sun» Sunday Each schedule consists of eight time periods set by the
3 n1n2n3n4 Current day and month setting. operator. These time periods can be flagged to be in effect or
01:01 to 31:12 n1n2:day (01 to 31). The first time the Enter button is not in effect on each day of the week plus a holiday period (see
continuously pressed, the first two characters in the
4-digit display flash so that day can be adjusted. section 4.5.7.7 on public holidays). The day begins at 00.00
n3n4:month (01 to 12). Continuous pressing of the hours and ends at 24.00 hours.
Enter key again causes the last two characters to
flash so that month can be adjusted.
4 nnnn Current year setting.
Program is in unoccupied mode unless a schedule time period is
in effect. If two periods overlap and are both active on the same
day, the occupied mode takes priority over the unoccupied
period.

Each of the eight periods can be displayed and changed with the
aid of a sub-sub-menu. The table below shows how to access the
period configuration. Method is the same for the time schedule
#1 or the time schedule #2.

22
6.4 - Alarm codes

The following list gives a complete description of each alarm code and its possible cause.
Alarm Description Why was this alarm Action taken by the control Reset type Probable cause
code generated?
1 Evaporator entering fluid thermistor failure Thermistor outside range Unit shut down Auto, if the temperature Thermistor or wiring fault or
-40 to 118°C measured by the sensor cable/wire damaged
becomes normal again
2 Evaporator leaving fluid thermistor failure Ditto Unit shut down Ditto Ditto
3 Condenser entering fluid thermistor failure Ditto None, simple message Ditto Ditto
4 Condenser leaving fluid thermistor failure Ditto None in cooling mode Ditto Ditto
Unit shut down in heating mode
5 Condenser entering fluid thermistor failure Ditto None, simple message Ditto Ditto
6 Condenser leaving fluid thermistor failure Ditto None Ditto Ditto
7 Outdoor temperature sensor fault Ditto Reset based on deactivated Ditto Ditto
outdoor sensor
8 CHWS (master/slave) fluid thermistor fault Ditto Master/slave function Ditto Ditto
deactivated
9 Compressor A1, discharge gas sensor Ditto Compressor A1 shut down Ditto Thermistor, solenoid, motor
cooling or wiring fault
10 Compressor A2, discharge gas sensor Ditto Compressor A2 shut down Ditto Ditto
11 Compressor B1, discharge gas sensor Ditto Compressor B1 shut down Ditto Ditto
12 Compressor B2, discharge gas sensor Ditto Compressor B2 shut down Ditto Ditto
13 External 0-10 V dc signal fault Signal outside range 1- Loadshed: not used Ditto Defective input or wiring fault
2- Demand limit: deactivated
14 Discharge pressure transducer failure, Measured signal = 0 V dc Circuit A shut down Ditto Defective transducer, wiring fault
circuit A
15 Discharge pressure transducer failure, Ditto Circuit B shut down Ditto Ditto
circuit B
16 Suction pressure transducer failure, crt A Ditto Circuit A shut down Ditto Ditto
17 Suction pressure transducer failure, crt B Ditto Circuit B shut down Ditto Ditto
18 Oil pressure transducer failure, compr A1 Ditto Compressor A1 shut down Ditto Ditto
19 Oil pressure transducer failure, compr A2 Ditto Compressor A2 shut down Ditto Ditto
20 Oil pressure transducer failure, compr B1 Ditto Compressor B1 shut down Ditto Ditto
21 Oil pressure transducer failure, compr B2 Ditto Compressor B2 shut down Ditto Ditto
22 Economizer A1 transducer failure Ditto Circuit A shut down for unit Ditto Ditto
with economizer. Otherwise
compressor A1 shut down.
23 Economizer A2 transducer failure Ditto Compressor A2 shut down Ditto Ditto
24 Economizer B1 transducer failure Ditto Circuit B shut down for unit Ditto Ditto
with economizer. Otherwise
compressor B1 shut down.
25 Economizer B2 transducer failure Ditto Compressor B2 shut down Ditto Ditto
26 Pressure sensor failure - coil pump down Ditto Circuit A remains in cooling Ditto Ditto
circuit A mode
27 Pressure sensor failure - coil pump down Ditto Circuit B remains in cooling Ditto Ditto
circuit B mode
28 Fault in the motor cooling valve position Ditto None Ditto Ditto
sensor, circuit A
29 Fault in the motor cooling valve position Ditto None Ditto Ditto
sensor, circuit B
30 Loss of communication with SCPM A1 SCPM A1 board does not Compressor A1 shut down Ditto Wiring fault, incorrect address or
board respond defective board
31 Loss of communication with SCPM A2 SCPM A2 board does not Compressor A2 shut down Ditto Ditto
board respond
32 Loss of communication with SCPM B1 SCPM B1 board does not Compressor B1 shut down Ditto Ditto
board respond
33 Loss of communication with SCPM B2 SCPM B2 board does not Compressor B2 shut down Ditto Ditto
board respond
34 Loss of communication with EXV board 4xDO board associated with Unit shut down Ditto Ditto
the EXV does not respond
35 Loss of communication with fan board #1 4xDO board controlling the Unit shut down if number of fan Ditto Ditto
first four fan stages does stages by circuit is lower than
not respond three. Otherwise circuit A shut
down.
36 Loss of communication with fan board # 2 4xDO board controlling the Circuit B shut down Ditto Ditto
fan stages of circuit B does
not respond
37 Loss of communication with auxiliary Board does not respond Unit shut down if heating mode Automatic Bus wiring fault, incorrect
board type 1 has been selected. address or defective board
38 Loss of communication with heat reclaim Analogue board does not Unit shut down if heat reclaim Automatic if board is Auxiliary board faulty
or respond mode is selected. again detected Faulty connection
evaporator heater board
39 ‘CCN/clock board’ fault CCN/clock board is no Unit shut down Ditto Defective CCN/clock board
longer detected
40** Control box thermostat fault or phase Sensor overheated Unit shut down Auto if the same alarm Badly ventilated control box
reversal has not tripped the same
day

32
Alarm Description Why was this alarm Action taken by the control Reset type Probable cause
code generated?
41 Unit emergency stop CCN command to stop the unit Unit shut down CCN/Automatic Control network
received
42 Initial factory configuration required All factory parameters are 0 Unit cannot start Auto No factory configuration
43-n Illegal initial factory configuration Bad factory configuration Ditto Ditto Factory configuration error
43-1 Compr A capacity too high
43-2 Compr B2 configured and compressor
B1 absent
43-3 Fan configured for a water-cooled
condenser
43-4 Fans not configured
43-5 Heat reclaim option configured and
reclaim sensors configured
44 Discharge pressure circuit A too high SCT>loadshed threshold. Max. Circuit A shut down Auto in the 10mn that Transducer/high pressure switch
satur. condensing pressure follow or fan circuit defective, water flow
(mct_sp) if only one capacity obstructed in the condenser,
stage remains in operation water entering temperature or
condenser air too high
45 Discharge pressure circuit B too high SCT>loadshed threshold. Max. Circuit B shut down Ditto Ditto
satur. condensing pressure
(mct_sp) if only one capacity
stage remains in operation
46 Oil solenoid failure, compressor A1 Oil pressure differential >17kPa Compressor A1 not authorised Auto if the same alarm Oil valve defective
during the period following to start has not tripped the same
pump start-up and before day
opening of the oil solenoid (see
prelubrication)
47 Oil solenoid failure, compressor A2 Ditto Compressor A2 not authorised Ditto Ditto
to start
48 Oil solenoid failure, compressor B1 Ditto Compressor B1 not authorised Ditto Ditto
to start
49 Oil solenoid failure, compressor B2 Ditto Compressor B2 not authorised Ditto Ditto
to start
50 Pre-start oil pressure, compressor A1 Oil pump does not sufficiently Compressor A1cannot start Ditto Low oil level, oil pump, oil
increase the pressure during solenoid or oil transducer failure
several prelubrication cycles
51 Pre-start oil pressure, compressor A2 Oil pump does not sufficiently Compressor A2 cannot start Ditto Ditto
increase the pressure during
several prelubrication cycles
52 Pre-start oil pressure, compressor B1 Oil pump does not sufficiently Compressor B1 cannot start Ditto Ditto
increase the pressure during
several prelubrication cycles
53 Pre-start oil pressure, compressor B2 Oil pump does not sufficiently Compressor B2 cannot start Ditto Ditto
increase the pressure during
several prelubrication cycles
54 Oil level circuit A low Oil level control contact open Circuit A shut down Manual Oil level detector defective, oil
during operation quantity insufficient
55 Oil level circuit B low Oil level control contact open Circuit B shut down Manual Ditto
during operation
56 Low saturated suction temp, circuit A SST under defrost theshold* for Circuit A shut down Auto if the same alarm Low refrigerant charge, filter drier
3 minutes has not tripped the same obstructed, expansion valve and
day transducer defective, low water
flow, low evaporator water
temperature
57 Low saturated suction temp, circuit B SST under defrost threshold* for Circuit B shut down Ditto Ditto
3 minutes
58 High saturated suction temp, circuit A After 90 seconds of operation if Circuit A shut down Manual Expansion valve, liquid level
SST > 12.8°C & EXV < 1% sensor or transducer defective,
high evaporator temp.
59 High saturated suction temp, circuit B After 90 seconds of operation if Circuit B shut down Manual Ditto
SST > 12.8°C & EXV < 1%
60 Low discharge superheat, circuit A Superheat <2.8 K for 10 minutes Circuit A shut down Auto if the same alarm Thermistor, transducer, EXV or
has not tripped the same economizer defective
day
61 Low discharge superheat, circuit B Superheat <2.8 K for 10 minutes Circuit B shut down Ditto Ditto
62 Max. oil pressure difference, (Discharge pressure - oil Compressor A1 shut down Manual Obstructed oil filter, oil solenoid or
compressor A1 pressure) >340 kPa for more shut-off valve blocked, or manual
than 6 seconds oil valve closed
63 Max. oil pressure difference, (Discharge pressure - oil Compressor A2 shut down Manual Ditto
compressor A2 pressure) >340 kPa for more
than 6 seconds
64 Max. oil pressure difference, (Discharge pressure - oil Compressor B1 shut down Manual Ditto
compressor B1 pressure) >340 kPa for more
than 6 seconds
65 Max. oil pressure difference, (Discharge pressure - oil Compressor B2 shut down Manual Ditto
compressor B2 pressure) >340 kPa for more
than 6 seconds
66 Loss of commuincation with System The unit is controlled by a Unit returns to autonomous Auto Defective CCN BUS wiring or
Manager System Manager (Flotronic or operating mode system module failure
Chiller) and communication with
this module is lost for more than
two minutes
67 Loss of communication with master or The master/slave link is broken Unit returns to autonomous Auto Defective CCN BUS wiring or loss
slave unit due to a loss of communication operating mode of supply
between the two units for more
than 2 minutes

33
Alarm Description Why was this alarm Action taken by the control Reset type Probable cause
code generated?
68 Low oil pressure compr A1 Oil pressure differential below Compressor A1 shut down Auto if the same alarm Low condenser air or water
the setpoint (dynamically has not tripped the same temperature, oil filters obstructed,
calculated) for 15 seconds day oil valve blocked, oil solenoid and
oil pressure transducer defective
69 Low oil pressure compr A2 Oil pressure differential below Compressor A2 shut down Ditto Ditto
the setpoint (dynamically
calculated) for 15 seconds
70 Low oil pressure compr B1 Oil pressure differential below Compressor B1 shut down Ditto Ditto
oil setpoints 1 or 2 (see alert
criteria for low oil pressure and
setpoint)
71 Low oil pressure compr B2 Oil pressure differential below Compressor B2 shut down Auto if the same alarm Ditto
the setpoint (dynamically has not tripped the same
calculated) for 15 seconds day
72 Evaporator frost protection 1 - Evaporator EWT or LWT Unit shut down. Evaporator Ditto Defective thermistor, low water
below defrost setpoint pump and if applicable heater flow
2 - On units equipped with an start-up, if unit has shut down
evaporator heater, heater air-cooled units)
operates for more than 15
minutes but does ot heat the
evaporator
73 Condenser frost protection, circuit A For water-cooled units and fluid Unit shut down. Condenser Automatic Discharge pressure transducer
type = water, if SCT<1,1°C pump start-up, if unit has shut defective, refrigerant leak or low
down condenser water temperature
74 Condenser frost protection, circuit B For water-cooled units and fluid Unit shut down. Condenser Automatic Ditto
type = water, if SCT<1,1°C pump start-up, if unit has shut
down
75 Evaporator water flow control failure 1 - Control not closed, before Unit shut down. Pump shut Manual Evaporator pump control or water
end of the start-up delay or down flow switch failure
open during operation
2 - Pump shut down for 2 mins
and water flow contact closed
76 Condenser water flow loss Water flow switch (water-cooled Unit shut down Manual Condenser pump, low water flow,
units) not closed during the water flow switch
minute after start-up
77 High current, compressor A1 Current higher than threshold Compressor A1 shut down Auto after 10 mn delay Operation above the compressor
value detected capacity
78 High current, compressor A2 Ditto Compressor A2 shut down Ditto Ditto
79 High current, compressor B1 Ditto Compressor B1 shut down Ditto Ditto
80 High current, compressor B2 Ditto Compressor B2 shut down Ditto Ditto
81 Pump 1 fault Evaporator water pump contact Unit shut down Manual Pump overheat or bad pump
open, when the pump has connection
received a command to run
82 Pump 2 fault Ditto Ditto Manual Ditto
83 Heat reclaim mode fault, circuit A 1. Interlock not closed 1 minute Circuit A remains in cooling Manual 1. Water flow switch defective.
after condenser pump start-up mode 2. Leak or heat reclaim shutoff or
or open during heat reclaim drain solenoid valve open.
operation
2. More than two consecutive
pumpdown sequences not
successful.
84 Heat reclaim mode fault, circuit B Ditto Circuit B remains in cooling Manual Ditto
mode
85 Water flow fault, heat reclaim Water flow detector (water- Unit remains in cooling mode Manual Ditto
condenser cooled units) not closed for one
minute
86-nn Master/slave configuration fault Bad master/slave configuration Master/slave control not Auto/manual for heating/ Master/slave configuration error
allowed cooling mode fault
87-n Maintenance alert A maintenance alert is active None Manual
87-1 Charge too low
87-2 Water loop too low
87-3 Air filter maintenance delay elapsed
87-4 Pump 1 maintenance delay elapsed
87-5 Pump 2 maintenance delay elapsed
87-6 Water filter maintenance delay elapsed

34
Alarm Function Description Action Reset Note
1xx Defect compressor A1 See SCPM subcodes below See SCPM subcodes below Manual
2xx Defect compressor A2 See SCPM subcodes below See SCPM subcodes below Manual
3xx Defect compressor B1 See SCPM subcodes below See SCPM subcodes below Manual
4xx Defect compressor B2 See SCPM subcodes below See SCPM subcodes below Manual

SCPM subcodes (XX)

Alarm Function Description Action Reset Note
01 High motor temperature SCPM detects high motor temperature, if Compressor shut down Manual Solenoid, cooling motor
temperature is higher than 110°C for 10 defect, low refrigerant
seconds charge. Wiring, motor
temperature sensor or
SCPM board fault
02 Motor temperature sensor SCPM measures a temperature outside the Ditto Manual Thermistor, solenoid,
-40°C to 118°C temperature range motor cooling or wiring
fault
03 High pressurestat tripped HPS port to SCPM module open Ditto Manual Lack of condenser water
flow. Condenser valve
blocked, fan circuit fault,
high condenser entering
air or water temperature
04 High motor current Ditto Manual Operation outside the
compressor capacity.
Configuration block badly
perforated, motor fault
05 Rotor blocked SCPM detects high current, based on MTA Ditto Manual Load too high
rating
06 Ground current fault SCPM detects ground current (2.5 +2/- 0 Ditto Manual Ground current fault on
amps) motor winding, wiring fault
07 Current drop in one SCPM measures a current drop > = 65% Ditto Manual Motor fault, wiring fault
phase L1
08 Current drop in one SCPM measures a current drop > = 65% Ditto Manual Motor fault, wiring fault
phase L2
09 Current drop in one SCPM measures a current drop > = 65% Ditto Manual Motor fault, wiring fault
phase L3
10 Current imbalance >14% SCPM measures a current imbalance None, simple message Manual, if threshold alarm Loss of power supply,
between phases as more than 14% for 25 is validated. Otherwise wiring fault, loose terminal,
minutes auto reset. core defective
11 Current imbalance >18% SCPM measures a current imbalance Compressor shut down, Ditto Poor power supply, loose
between phases of more than 18% for 25 if threshold alarm is terminal, core defective
minutes validated.
12 No motor current SCPM module shows less than 10% of the Shut down Manual Power supply interrupted,
MTA for more than 3 seconds fuse(s) blown, wiring fault,
core defective
13 Star-delta start-up Compressor shut down Manual Defective connector
14 Contactor failure SCPM detects 10% of the MTA for 10 Unit shut down Manual Defective/blocked
seconds after shutdown of the compressor contactor
contactor. Oil solenoid still has supply.
15 Compressor shut-down Circuit shut down Manual Contact stuck
not possible
16 Current phase reversal SCPM detects a current phase reversal via Compressor shut down Manual Supply phases or cables
the core reversed, core wiring
reversed after replacement
17 Configuration block fault SCPM detects a reading fault at the block Compressor shut down Manual Configuration block on
SCPM board badly
perforated or badly placed.
Defective board.
Legend
* Defrost threshold = 1,1°C for water or for the lowest cooling setpoint less 4,4°C for brine or low brine.
** This safety circuit is controlled by two contacts, 16A and 16B, which are connected in series internally. If there is only a single control box there is a jumper
on 16B, otherwise 16B controls the control box safety of the circuit. If one of the two contacts 16A and 16B is open, the whole unit is in fault status.
SCPM: Compressor protection module
FSM: Flotronic System ManagerTM
CSM: Chiller System Manager
MTA: Compressor Must Trip Amperes

35