INSTALLER’S GUIDE

CONDENSING UNITS

X DRIVE SERIES
Split System Air Conditioner 2-5 Tons R410A
Up to 18 SEER

Thank you very much for purchasing our product,

Before using your unit , please read this manual carefully and keep it for future reference.
The figure shown in this manual is for reference only and may be slightly different from the actual product.
 ALL PHASES OF THIS INSTALLATION MUST COMPLY WITH
NATIONAL, STATE AND LOCAL CODES
WARNING
IMPORTANT — This document is customer property and is to remain with this unit. Please return to service
information pack upon completion of work.
These instructions do not cover all variations in systems or provide for every possible contingency to be met in
connection with the installation. Should further information be desired or should particular problems arise which are
not covered sufficiently for the purchaser’s purposes, the matter should be referred to your installing dealer or local
distributor.

NOTE
The manufacturer recommends installing only approved matched indoor and outdoor systems. All of the manufacturer’s
split systems are AHRI rated only with TXV indoor systems. And the indoor units must be matched with TXV. Some of
the benefits of installing approved matched indoor and outdoor split systems are maximum efficiency, optimum
performance and the best overall system reliability.

CONTENTS
1 SAFETY 01

2 UNIT LOCATION CONSIDERATIONS

2.1 Unit Dimensions 02
2.2 Refrigerant Piping Limits 02
2.3 Location Restrictions 03

3 UNIT PREPARATION
3.1 Prepare the Unit for Installation 04

4 SETTING THE UNIT

4.1 Pad Installation 04

5 REFRIGERANT LINE CONSIDERATIONS

5.1 Refrigerant Line and Service Valve Connection Sizes 05
5.2 Required Refrigerant Line Length 05
5.3 Refrigerant Line Insulation 05
5.4 Reuse Existing Refrigerant Lines 05

6 REFRIGERANT LINE ROUTING

6.1 Precautions 05

7 REFRIGERANT LINE BRAZING

7.1 Braze the Refrigerant Lines 07
8 REFRIGERANT LINE LEAK CHECK
8.1 Check for Leaks 08

9 EVACUATION
9.1 Evacuate the Refrigerant Lines and Indoor Coil 08

10 SERVICE VALVES
10.1 Open the Service Valves 09

11 ELECTRICAL - LOW VOLTAGE

11.1 Low Voltage Maximum Wire Length 10
11.2 Low Voltage Hook-Up Diagrams 10
11.3 Thermostat Wiring Diagrams 10

12 ELECTRICAL - HIGH VOLTAGE

12.1 High Voltage Power Supply 14
12.2 High Voltage Disconnect Switch 14
12.3 High Voltage Ground 14

13 START UP
13.1 System Start Up 14

14 SYSTEM CHARGE ADJUSTMENT

14.1 Charging: Weigh-In Method 15
14.2 Subcooling Charging and Refrigerant Adjustment in Cooling
(Above 55°F Outdoor Temp.) 15

15 SYSTEM OPERATION AND TROUBLESHOOTING

15.1 Control Logic Description 18
15.2 Sensors (Thermistors /Pressure Transducer) 18
15.3 Pressure Equalizer Valve (PEV) 18
15.4 Defrost Description 18
15.5 Compressor Crankcase Heater Description 19
15.6 Reversing Valve Operation 19
15.7 Protection Functions 19
15.8 Fault Code Table 20
15.9 Parameter Point Check Table 21
15.10 Control Board Overviews 22
15.11 Error Code Troubleshooting 24
15.12 Temperature and Resistance Relationship Tables (for Sensors) 30
15.13 Temperature and Resistance Relationship Tables (for T5 Sensor) 31
1 SAFETY WARNING

Important - This document contains a wiring diagram and BRAZING REQUIRED!

service information. This is customer property and is to Failure to inspect lines or use proper service
remain with this unit. Please return to service information tools may result in equipment damage or
pack upon completion of work. personal injury. if using existing refrigerant lines
make certain that all joints are brazed, not
soldered.
CAUTION
This information is intended for use by
individuals possessing adequate backgrounds
of electrical and mechanical experience. Any CAUTION
attempt to repair a central air conditioning
product may result in personal injury and/or CONTAINS REFRIGERANT!
property damage. The manufacturer or seller
cannot be responsible for the interpretation of Failure to follow proper procedures can result in
this information, nor can it assume any liability in personal illness or injury or severe equipment
connection with its use. damage. Systems contain oil and refrigerant
under high pressure. Recover refrigerant to
relieve pressure before opening a system.

WARNING GROUNDING REQUIRED!

Failure to inspect or use proper service tools
HAZARDOUS VOLTAGE! may result in equipment damage or personal
Failure to follow this warning could result in injury. Reconnect all grounding devices. All parts
property damage, severe personal injury or of this product that are capable of conducting
death. Disconnect all electric power, Including electrical current are grounded. if grounding
remote disconnects before servicing. Follow wires, screws, straps, clips, nuts, or washers
proper lockout/tagout procedures to ensure the used to complete a path to ground are removed
power cannot be inadvertently energized. for service, they must be returned to their
original position and properly fastened.
REFRIGERANT OIL!
INDOOR UNIT REQUIRED!
Any attempt to repair a central air conditioning
product may result in property damage, severe The indoor unit must be matched with TXV. And
personal injury, or death. the model of TXV can be changed according to
These units use R-410A refrigerant which the system capacity.
operates at 50 to 70% higher pressures than
R-22. Use only R-410A approved service HOT SURFACE!
equipments. Refrigerant cylinders are painted a May cause minor to severe burning. Failure to
“Rose” color to indicate the type of refrigerant follow this caution could result in property
and may contain a “dip” tube to allow for chargi- damage or personal injury. Do not touch the top
ng of liquid refrigerant into the system. All of compressor.
R-410A systems with variable speed compress-
ors use a PVE oil (FV50S or equivalent) that
readily absorbs moisture from the atmosphere.
To limit this “hygroscopic” action, the system
should remain sealed whenever possible. If a
system has been open to the atmosphere for
WARNING
more than 4 hours, the compressor oil must be
This product can expose you to chemicals
replaced. Never break a vacuum with air and
including Lead and Lead components, which are
always change the driers when opening the
known to the State of California to cause cancer
system for component replacement.
and birth defects or other reproductive harm. For
more information go to www. P65Warnings.ca.
HIGH CURRENT LEAKAGE!
gov.
Failure to follow this warning could result in
property damage, severe personal injury, or
death. Earth connection is essential before
connecting electrical supply.
INFORMATION
SERVICE VALVES!
The manufacturer recommends installing only
Failure to follow this warning will result in abrupt approved matched indoor and outdoor systems.
release of system charge and may result in All of the manufacturer’s split systems are AHRI
personal injury and/or property damage. rated only with TXV indoor systems. Some of the
Extreme caution should be exercised when benefits of installing approved matched indoor
opening the Liquid Line Service valve. Turn and outdoor split systems are maximum
valve stem counterclockwise only until the stem efficiency, optimum performance and the best
contacts the rolled edge. No torque is required. overall system reliability.

01
2 UNIT LOCATION Maximum line equivalent length = 100 feet.

CONSIDERATIONS Maximum vertical equivalent length = 50 feet.

Use only the line diameters indicated in Table 2-2.

2.1 Unit Dimensions If the suction linesets are greater than 50 feet, do
not use a larger suction line than recommended.

Unit Dimensions
Models H x W x L (Inches)
24/36 24-15/16 x 29-1/8 x 29-1/8
48/60 33-3/16 x 29-1/8 x 29-1/8
Table 2-1

The unit’s weight values are on the cardboard box.

When mounting the outdoor unit on a roof, be sure the
roof will support the unit’s weight. Properly selected Standard Lineset
isolation is recommended to prevent sound or vibration Lineset 100' Max
transmission to the building structure. Line Length

50' Max
Line Lift

Figure 2-1
50' Max
Line Lift
2.2 Refrigerant Piping Limits

System Liquid Suction Total Equivalent Length - Feet

Capacity Line Line 25 50 75 100
Model
Inch O.D. Maximum Vertical Separation - Feet

3/4 Std. 25 50 45 40
2 Ton 3/8 * Figure 2-2
5/8 Opt. 25 50 45 40

5/8 Opt. 25 50 50 50
3 Ton 3/8 *
3/4 Std. 25 50 50 50

7/8 Std. 25 50 50 40
4 Ton 3/8 *
3/4 Opt. 25 50 50 40

7/8 Std. 25 50 50 40

5 Ton 3/8 * 3/4 Opt. 25 50 50 40

1 1/8 Opt. 25 40 N/A N/A

Table 2-2
* Standard line size is recommended;
N/A: Application not recommended;
Refrigerant charge: refer to Sec. 14

02
2.3 Location Restrictions
Ensure the top discharge area is unrestricted for at least
60 inches above the unit.
Do not locate outdoor unit near bedrooms since normal
operational sounds may be objectionable.
Position unit to allow adequate space for unobstructed
airflow, wiring, refrigerant lines, and serviceability.
Position the outdoor unit a minimum of 12" from any wall
or surrounding shrubbery to ensure adequate airflow.
24 inches clearance must be provided in front of the Min. 12" to
control box (access panels) and any other side requiring Shrubbery Min. 12" to
service. wall

Maintain a distance of 24 in. between units.

Position the unit where water, snow, or ice from roof or
overhang cannot fall directly on it.
Only use this unit in well-ventilated spaces and ensure
that there are no obstructions that could impede the
airflow into and out of the unit.
Figure 2-4
Do not install this unit in the following locations:
Locations with mineral oil.
Cold climate considerations (heat pump only)
Locations with saline atmospheres, such as seaside
locations.
NOTE
Locations with sulphurous atmospheres, such as
near natural hot springs. Precautions must be taken for units being
installed in areas where snow accumulation and
Where high voltage electricity is present, such as in
prolonged below-freezing temperatures occur.
certain industrial locations.
On vehicles or vessels, such as trucks or ferry
boats.
Units should be elevated 3-12 inches above the pad
Where exposure to oily or very humid air may occur, or rooftop, depending on local weather. This
such as kitchens. additional height will allow drainage of snow and ice
melted during defrost cycle prior to its refreezing.
In proximity to sources of electromagnetic radiation,
Ensure that drain holes in unit base pan are not
such as high-frequency transmitters or other high
obstructed, which could prevent the drainage of
strength radiation devices.
defrost water (Fig. 2-5).
If possible, avoid locations that are prone to snow
drifts. If not possible, a snow drift barrier should be
Avoid Installations installed around the unit to prevent a build-up of
Near Bedrooms snow on the sides of the unit.

Min. 60" Unrestricted

Min. 12"

Snow
Min. 12" to Min. 24" barrier
Shrubbery Unrestricted

Snow legs
Access Panel
3-12" Elevation

Pad

Figure 2-5
Figure 2-3

03
3 UNIT PREPARATION
3.1 Prepare the Unit for Installation
Check for damage and report promptly to the carrier
any damage found to the unit (Fig. 3-1).
The charge port can be used to ensure the refrigerant
charge has been retained during shipment.

Figure 4-1

See Section 2.1

for unit dimensions

Figure 3-1

4 SETTING THE UNIT

4.1 Pad Installation

When installing the unit on a support pad, such as a See Detail A
concrete slab, consider the following:
The pad must be at least 1-2” larger than the unit on
all sides.
The pad must be separated from any structure.
The pad must be level.
#7 X 3/8" Self-tapping screws
The pad must be high enough above grade to allow (Do not exceed 3/8" length screws!)
for drainage. Field-supplied brackets:
2" width, 1/16" thickness,
The pad location must comply with National, State, height as required.
and Local codes. Detail A

NOTE
These instructions are intended to provide a
method to tie-down a system to a cement slab as
a securing procedure for high wind areas. Check
local codes for tie-down methods and protocols.
1/4” Χ 1-1/2” Hex washer head concrete screws
(3/16” pilot hole needed. Pilot hole should be 1/4” deeper
than the fastener embedment)

Figure 4-2

04
5 REFRIGERANT LINE 5.4 Reuse Existing Refrigerant
CONSIDERATIONS Lines

5.1 Refrigerant Line and Service CAUTION

Valve Connection Sizes If using existing refrigerant lines, make certain
that all joints are brazed, not soldered.
Suction Line Liquid Line
Suction Line Liquid Line Connection Connection
Models
Dimensions in inches For retrofit applications, where the existing refrigerant
lines will be used, the following precautions should be
24/36 3/4 3/8 3/4 3/8
taken:
48/60 7/8 3/8 7/8 3/8 Ensure that the size of the refrigerant lines is correct.
Refer to Section 2.2 and Table 5-1.
Table 5-1 Ensure that the refrigerant lines are free of leaks,
acid, and oil.

5.2 Required Refrigerant Line

Length NOTE
The manufacturer recommends installing only
Determine required line length (Fig. 5-1). Refer to
approved matched indoor and outdoor systems.
Section 2.2.
All of the manufacturer’s split systems are AHRI
rated only with TXV indoor systems. The
benefits of installing approved matched indoor
and outdoor split systems are maximum
efficiency, optimum performance and the best
overall system reliability.

Line Length 6 REFRIGERANT LINE ROUTING

6.1 Precautions

Figure 5-1
NOTE
Take precautions to prevent noise within the
building structure due to vibration transmission
5.3 Refrigerant Line Insulation from the refrigerant lines. For example:

When the refrigerant lines have to be fastened to floor

NOTE
joists or other framing in a structure, use isolation
The Suction Line must always be insulated. DO type hangers.
NOT allow the Liquid Line and Suction Line to Isolation hangers should also be used when
come in direct (metal to metal) contact. refrigerant lines are run in stud spaces or enclosed
ceilings.
Where the refrigerant lines run through a wall or sill,
Suction Line
Liquid Line they should be insulated and isolated.
Isolate the lines from all ductwork.
Insulation
Minimize the number of 90º turns.

Comply with National, State, and Local codes

when isolating linesets from joists, rafters, walls,
or other structural elements.

Figure 5-2

05
 8 Feet Maximum

Joist/Rafter

Isolator

Side View
8 Feet Maximum
Lineset

Secure Suction Line from joists using isolators every 8 ft. Secure Liquid Line
directly to Suction Line using tape, wire, or other appropriate method every 8 ft.

Isolation From Joist/Rafter

Figure 6-1

8 Feet Maximum
Wall

Isolator

Linesets
Side View 8 Feet Maximum

Secure Suction Line using isolators every 8 ft. Secure Liquid Line directly to
Suction Line using tape, wire, or other appropriate method every 8 ft.

Isolation On Walls

Figure 6-2

Wall

Sealant
Ductwork

Insulation

Suction Line

Isolator

Lineset

DO NOT hang linesets from ductwork

Isolation Through Wall

Figure 6-3

06
7 REFRIGERANT LINE BRAZING 4. Wrap a wet rag around the valve body to avoid heat
damage and continue the dry nitrogen purge (Fig.
7-4).
7.1 Braze The Refrigerant Lines Braze the refrigerant lines to the service valves.

1. Remove caps or plugs. Use a deburring tool to Continue the dry nitrogen purge. Do not remove the
deburr the pipe ends. Clean both internal and wet rag until all brazing is completed.
external surfaces of the tubing using an emery cloth.

NOTE
Remove the wet rag before stopping the dry
nitrogen purge.

Figure 7-1

2. Remove the pressure tap cap from both service

Figure 7-4
valves.

5. Replace the pressure tap caps after the service

valves have cooled.

Figure 7-2

3. Purge the refrigerant lines and indoor coil with dry

nitrogen. Figure 7-5

This pipe
must have
a thimble

Figure 7-3

07
8 REFRIGERANT LINE LEAK 9 EVACUATION
CHECK
9.1 Evacuate the Refrigerant Lines
8.1 Check For Leaks and Indoor Coil
1. Pressurize the refrigerant lines and evaporator coil
to 150 PSIG using dry nitrogen. NOTE
Do not open the service valves until the
150 PSIG refrigerant lines and indoor coil leak check and
evacuation are complete.

1. Evacuate until the micron gauge reads no higher

than 350 microns, then close off the valve to the
vacuum pump.

0350
Microns

Figure 8-1 ON OFF

2. Check for leaks by using a soapy solution or bubbles

at each brazed location.

Figure 9-1

2. Observe the micron gauge. Evacuation is complete if

the micron gauge does not rise above 500 microns
in one (1) minute.
Once evacuation is complete, turn off the vacuum
pump and micron gauge, and close the valves on
the manifold gauge set.

1 MIN.
Figure 8-2

Figure 9-2

08
10 SERVICE VALVES Cap
5/16" Hex Wrench
10.1 Open the Service Valves for Suction Service Valve

3/16" Hex Wrench

WARNING Unit Side
of Service
for Liquid Service Valve
Valve
Extreme caution should be exercised when
opening the Liquid Line Service Valve. Turn Rolled Edge to
counterclockwise until the valve stem just Captivate Stem
touches the rolled edge. No torque is required. Hex Headed
Failure to follow this warning will result in abrupt Valve System
release of system charge and may result in
personal injury and /or property damage.

NOTE
Leak check and evacuation must be completed Service Port
before opening the service valves. The brazed
lineset valves should be used for leak checking
and vacuuming. Using the separate suction port
for this process will result in loss of charge. Figure 10-1

The Suction Service Valve must be opened first

BEFORE opening the Liquid Service Valve.

1. Remove Service Valve Cap (Fig. 10-1).

2. Fully insert hex wrench into the stem and back out
counterclockwise until valve stem just touches the
rolled edge (approximately five (5) turns.)
3. Replace the Valve Stem Cap to prevent leaks.
Tighten finger tight plus an additional 1/6 turn.
4. Repeat STEPS 1 - 3 for Liquid Service Valve.

09
11 ELECTRICAL - LOW VOLTAGE

11.1 Low Voltage Maximum Wire

Length
Table 11-1 defines the maximum total length of low
voltage wiring from the outdoor unit, to the indoor unit,
and to the thermostat.

24 Volts - Wire size Max. Wire Length

18 AWG 150 Ft.
16 AWG 225 Ft.
14 AWG 300 Ft.
Table 11-1

11.2 Low Voltage Hook-Up Diagrams

NOTES:
- Low voltage connection must be made inside the
outdoor unit control board access panel.
- There is no terminal block for low voltage connections,
wires must be spliced using field supplied wire nuts
- Field supplied wire nuts should be 22-16 gauge.
Control - Refer to unit wiring diagram for more information.
Board
Access
Panel

Figure 11-1 Low Voltage Unit Connections

11.3 Thermostat Wiring Diagrams

Be sure power supply agrees with equipment NOTE
nameplate.
Dashed lines in the following thermostat wiring
Power wiring and grounding of equipment must diagrams refer to optional wiring (wiring for
comply with local codes. Passive Dehumidification Function and/or
Electric Heat). For thermostat wiring please refer
Low voltage wiring must be No. 18 AWG minimum
to the Owner’s Manual of the thermostat.
conductor.
“- - - - - - - -” Field installed
Single-stage auxiliary heating supported by 2H B terminal to be connected with thermostat (O/B)
thermostat wiring. Reversing valve energizes in heating.

Two-stage auxiliary heating supported by 3H

thermostat
W1: The first stage of field installed electric auxiliary
heat.
W2: The second stage of field installed electric
auxiliary heat.
The outdoor unit W signal is connected to the electric
auxiliary heat or the first stage electric auxiliary heat.

10
 Support 3H and 2C thermostat

W/E

Y2

O/B
H/DH

WHITE/BLACK
YELLOW

YELLOW
PURPLE
BROWN

BROWN
TH E RM O S TAT

GREEN

WHITE

WHITE
GRAY

BLUE

BLUE
RED
Note: Any time the electric heat Dh B C G R Y1 Y2 W1 W2 C Y B W
elements are active, the indoor fan
will run in high stage.
INDOOR UNIT OUTDOOR UNIT

Figure 11-2

Wiring for 4H and 2C thermostat

W2

W/E

Y2

O/B

H/DH
WHITE/BLACK
YELLOW

YELLOW
PURPLE
BROWN

BROWN

THERMOSTAT
GREEN

WHITE

WHITE
GRAY

BLUE

BLUE
RED

Note: Any time the electric heat Dh B C G R Y1 Y2 W1 W2 C Y B W

elements are active, the indoor fan
will run in high stage. INDOOR UNIT OUTDOOR UNIT

Figure 11-3

11
 Wiring for 3H and 1C thermostat

W2

W/E

O/B
H/DH

WHITE/BLACK
YELLOW

YELLOW
PURPLE
BROWN

BROWN
THERMOSTAT

GREEN

WHITE

WHITE
GRAY

BLUE

BLUE
RED
Note: Because Y1 and Y2 are
jumped, the indoor fan will only run Dh B C G R Y1 Y2 W1 W2 C Y B W
in high stage.
INDOOR UNIT OUTDOOR UNIT
Note: Any time the electric heat
elements are active, the indoor fan
will run in high stage.

Figure 11-4

Wiring for 2H and 2C thermostat

Y2

O/B
H/DH
YELLOW

YELLOW
PURPLE
BROWN

BROWN

THERMOSTAT
GREEN
GRAY

BLUE

BLUE
RED

Note: Any time the electric heat Dh B C G R Y1 Y2 W1 W2 C Y B W

elements are active, the indoor fan
will run in high stage.
INDOOR UNIT OUTDOOR UNIT

Figure 11-5

12
 Wiring for 1H and 1C thermostat

O/B
H/DH

YELLOW

YELLOW
PURPLE
BROWN

BROWN
THERMOSTAT

GREEN
GRAY

BLUE

BLUE
RED
Note: Because Y1 and Y2 are Dh B C G R Y1 Y2 W1 W2 C Y B W
jumped, the indoor fan will only run
in high stage.
INDOOR UNIT OUTDOOR UNIT

Figure 11-6

Wiring for 2H and 1C thermostat

W/E

O/B
H/DH
WHITE/BLACK
YELLOW

YELLOW
PURPLE
BROWN

BROWN

THERMOSTAT
GREEN

WHITE

WHITE
GRAY

BLUE

BLUE
RED

Note: Because Y1 and Y2 are

jumped, the indoor fan will only run Dh B C G R Y1 Y2 W1 W2 C Y B W
in high stage.

Note: W1 and W2 are jumped, so

INDOOR UNIT OUTDOOR UNIT
Electric Heat will only function in
high stage.

Figure 11-7

13
12 ELECTRICAL - HIGH 12.3 High Voltage Ground
VOLTAGE
Ground the outdoor unit per National, State, and Local
code requirements.
12.1 High Voltage Power Supply

WARNING
LIVE ELECTRICAL COMPONENTS!
During installation, testing, servicing, and trouble
shooting of this product, it may be necessary to
work with live electrical components. Failure to
follow all electrical safety precautions when
exposed to live electrical components could
result in death or serious injury.

The high voltage power supply must match the

equipment nameplate (208/230V, 1PH, 60Hz). Figure 12-2

NOTE
13 START UP
Power wiring must comply with National, State,
and Local codes.
13.1 System Start Up
1. Ensure Sections 7, 8, 9, 10, 11, and 12 have been
Follow instructions on unit wiring diagram located on the
completed.
inside of the control box access panel and refer to wiring
diagram in this IOM.
2. Set System Thermostat to OFF.

12.2 High Voltage Disconnect

Switch
Install a separate disconnect switch at the outdoor unit.

Field supplied flexible electrical conduit must be used for

high voltage wiring.

Figure 13-1

3. Turn on disconnect to apply power to the indoor and

outdoor units.

ON

OFF
Figure 12-1

Figure 13-2

14
4. Upon initial unit installation, wait one (1) hour before New Installations — Calculating additional charge for
starting the unit if compressor crankcase heater is lineset greater than 15 ft.
used and the outdoor ambient temperature is below
70 ºF. 1. Total Line Length (ft) = _________(a)
2. Standard Lineset (ft) 15
= _________(b)
3. (a) minus (b) = _________(c)
4. Refrigerant Multiplier 0.6 oz/ft
= _________(d)
60 MIN. 5. Refrigerant Adder (c*d) = _________(e)*
*If lineset is less than 15 ft, (e) = 0

Sealed-System Repairs — Calculating total system

charge.
Figure 13-3
1. Total Line Length (ft) = _________(a)
5. Set system thermostat to ON. 2. Standard Lineset (ft) 15
= _________(b)
3. (a) minus (b) = _________(c)
4. Refrigerant Multiplier 0.6 oz/ft
= _________(d)
5. Refrigerant Adder (c*d) = _________(e)*
6. Factory Charge (namplate) = _________(f)
7. Total System Charge (e+f) = _________ -
*If lineset is less than 15 ft, (e) = 0

Figure 13-4 NOTE

The only mode approved for validating system
charge is while in Cooling "Force Mode".
Outdoor temperature must be between 55°F and
14 SYSTEM CHARGE 120°F with indoor temperature kept between
ADJUSTMENT 70°F and 80°F.

14.1 Charging: Weigh-In Method

14.2 Subcooling Charging And
Use weigh-in method the initial installation, or anytime a Refrigerant Adjustment In
system charge is being replaced. Weigh-in method can
also be used when power is not available to the Cooling
equipment site or operating conditions (indoor/outdoor (Above 55°F Outdoor Temp.)
temperatures) are not in range to verify with the
subcooling charging method.
1. Check the outdoor ambient temperatures.

Charge multiplier for

Subcooling (in cooling mode) is the only
interconnecting refrigerant recommended method of charging above 55ºF
Model Factory Charge
tube length outdoor ambient temperatures.

2 Ton 7 lbs 2 oz 0.6 oz/ft For outdoor ambient temperatures below 55ºF use
weigh-in charge method.
3 Ton 7 lbs 2 oz 0.6 oz/ft
4 Ton 10 lbs 3 oz 0.6 oz/ft
5 Ton 10 lbs 3 oz 0.6 oz/ft NOTE
Table 14-1 It is important to return in the spring or summer
to accurately charge the system in the cooling
mode when outdoor ambient temperature is
NOTE above 55ºF.

Power wiring must comply with National, State,

and Local codes.

15
 Outdoor Outdoor Compressor Frequency in Force Mode in Cooling
Temperature Temperature ODU Capacity 2TON 3TON 4TON 5TON
Above 55ºF Below 55ºF
Frequency (HZ) 56 76 56 66

Table 14-2
120ºF

55ºF 55ºF
20 MIN.

Outdoor Temp1 Outdoor Temp2 Figure 14-3

Figure 14-1
4. Calculate superheat value (According to Table 14-3)

For best results, the indoor temperature should be Measured Suction Line Temp = ________ºF
kept between 70ºF and 80ºF during the install. Measured Suction Line Pressure = _______ PSIG
Calculate superheat value = ________ºF

NOTE
80 ºF Check the superheat and select correct
subcooling according to superheat, refer to
70ºF Table 14-5. It is recommended to keep the
superheat at 10-18°F if a third party indoor unit is
used.

5. Calculate subcooling value (According to Table 14-4)

Measured Liquid Line Temp. = ________ºF
Indoor Temp
Measured Liquid Line Pressure = _______ PSIG
Figure 14-2 Calculate subcooling value = ________ºF

2. Ensure Sections 7,8,9,10,11,12 and 13 have been

completed.

3. Stabilize the system.

After starting the system in cooling mode, short
press “FORCE” button, and “ ” symbol should
appear. System may take 10 minutes to ramp up.
Operate the system for a minimum of twenty (20)
minutes.
Insulation

NOTE
Figure 14-4
After a twenty (20) minute stabilization period
operating at 100% capacity (i.e. once the
compressor reaches the frequency shown in NOTE
Table 14-2), maintain continuous operation while
adjusting refrigerant charge. After adjusting, If calculated subcooling value is lower than the
operate system for a minimum of five (5) minutes design subcooling value (Table 14-5), please
for system to stabilize, otherwise repeat step 3. add refrigerant. Repeat steps 3 through 5.

If the superheat is out of range, refer to

Troubleshooting section of this IOM.

16
Suction Final Superheat (°F) Connect gauges to refrigerant bottle and unit as
Temp 6 8 10 12 14 16 18 20 22 illustrated (Fig. 14-5).
(°F) Suction Gauge Pressure (PSI)
Purge all hoses.
40 105 101 97 93 89 86 82 78 75
42 109 105 101 97 93 89 86 82 78 Open tank.
44 114 109 105 101 97 93 89 86 82
Stop adding refrigerant when subcooling matches
46 118 114 109 105 101 97 93 89 86
the design value (Table 14-5).
48 123 118 114 109 105 101 97 93 89
50 128 123 118 114 109 105 101 97 93
52 133 128 123 118 114 109 105 101 97 NOTE
54 138 133 128 123 118 114 109 105 101
56 143 138 133 128 123 118 114 109 105 Recover refrigerant if the subcooling reading
58 148 143 138 133 128 123 118 114 109 from Table 14-4 is higher than the design value
60 153 148 143 138 133 128 123 118 114 (Table 14-5).
62 159 153 148 143 138 133 128 123 118
64 164 159 153 148 143 138 133 128 123
66 170 164 159 153 148 143 138 133 128
68 176 170 164 159 153 148 143 138 133
70 182 176 170 164 159 153 148 143 138
72 188 182 176 170 164 159 153 148 143
Table 14-3 R-410A Refrigerant chart - Final Superheat

Liquid Final Subcooling (°F)

Temp 6 7 8 9 10 11 12 13
(°F) Liquid Gauge Pressure (PSI)
55 173 176 179 182 185 188 191 195
60 188 191 195 198 201 204 208 211
65 204 208 211 215 218 221 225 229
70 221 225 229 232 236 239 243 247 Figure 14-5
75 239 243 247 251 255 259 262 266
80 259 262 266 270 275 279 283 287
85 279 283 287 291 295 300 304 309 7. Stabilize the system.
90 300 304 309 313 318 322 327 331 Wait 5 minutes for the system condition to stabilize
95 322 327 331 336 341 346 351 355 between adjustments.
100 346 351 355 360 365 370 376 381
105 370 376 381 386 391 397 402 407
110 397 402 407 413 418 424 430 435 NOTE
115 424 430 435 441 447 453 459 465
120 453 459 465 471 477 483 489 496 When the subcooling matches the design value
125 483 489 469 502 508 515 521 528
(Table 14-5), the system is properly charged.

Table 14-4 R-410A Refrigerant chart - Final Subcooling

Remove gauges.
Design Subcooling Replace service port caps to prevent leaks. Tighten
Model Subcooling/°F Superheat/°F finger tight plus an additional 1/6 turn.
10±2 10―18
24K/36K
8±2 7―10 8. Record System Information for reference (Table
8±2 9―18
48K 14-6).
6±2 7―9 Record system pressures and temperatures after
8±2 8―18 charging is complete.
60K
6±2 6―8
Description Value
Table 14-5
Outdoor model number
Note: Those values in first line are applicable for indoor units
with adjustable TXV or non-adjustable TXV. Measured Outdoor Ambient °F
Those values in second line are applicable for indoor Measured Indoor Ambient °F
units with non-adjustable TXV. Measured Liquid Line Temp °F
Measured Suction Line Temp °F
Liquid Gauge Pressure PSIG
Suction Gauge Pressure PSIG

6. Adjust refrigerant level to attain proper gauge Table 14-6

pressure.

NOTE
Add refrigerant if the subcooling reading from
Table 14-4 is lower than the designed value
(Table 14-5).

17
15 SYSTEM OPERATION AND 15.2 Sensors (Thermistors
TROUBLESHOOTING /Pressure Transducer)

15.1 Control Logic Description T3 = Outdoor Coil Temperature (Table 15-14)

— High/Low temperature protection
The variable speed system adopts the same 24VAC — Outdoor fan control (cooling mode)
control as any conventional heat pump.
— Defrost control (heating mode)
The compressor’s speed is controlled based on coil
pressures monitored by the unit's pressure T4 = Outdoor Ambient Temperature (Table 15-14)
transducer. To ensure stable and adequate
capacity, the compressor speed will modulate — Operating condition permission
relative to evaporator pressure during cooling — Defrosting condition permission
operation and relative to condensing pressure
during heating operation. The target pressure can — Outdoor fan control (heating mode)
automatically adjust based on compressor
operation so optimal capacity can be achieved. T5 = Compressor Discharge Temperature (Table
Target pressure can be manually adjusted (SW4) to 15-15)
achieve improved dehumidification and capacity — High/Low temperature protection
demands.
— Electronic Expansion Valve (EEV)
(ODU/heating mode only)

TF = Control board Temperature (Table 15-15)

— Inverter High Temperature Protection
SW4
Pressure transducer
ON
— Compressor frequency control
OFF 1 2 3 4
— Electronic Expansion Valve (EEV) control
(heating mode only)

Figure 15-1 — High pressure protection (heating mode)

— Low pressure protection (cooling mode)
Switch Description
ON Unused
SW4-1
OFF* Must be set at "OFF" position
ON Unused
SW4-2
OFF* Must be set at "OFF" position
ON Adaptive capacity output disabled
15.3 Pressure Equalizer Valve (PEV)
SW4-3
OFF* Adaptive capacity output enabled
Used to balance the pressure in the system before the
ON Accelerated cooling/heating
SW4-4 compressor starts up.
OFF* Normally cooling/heating
Table 15-1
*Factory Default

15.4 Defrost Description (Heat Pump Only)

Adaptive capacity function is a "self-learning
function" which allows a range of target coil
temperatures to adapt for better unit operation and The Demand Defrost Control (DDC) monitors the
reduced short cycling. ODU coil temperature using thermistor (T3). A
second thermistor (T4) monitors outdoor ambient
Accelerated cooling/heating function changes the temperature. Based on these parameters, as well
initial target coil temperature to provide "enhanced as accumulative run time and high pressure, the
comfort" by increasing unit capacity. DDC calculates proper initiation of defrost.

Any one of the below three conditions is required to

enter defrost:
1. The calculated temperature difference between
the outdoor temperature (T4) and the coil
temperature (T3) is called Delta T. After Delta T is
achieved and continues for 3 minutes.
— T4 ≥ 39°F, Delta T = 18°F
— T4 ≥ 30°F, Delta T = 16°F
— T4 ≥ 19°F, Delta T = 14°F
— When T4 < 19°F, T3 < 9°F, accumulative
compressor run time ≥ 80 minutes.

18
 2. After “Minimum Run Time” (MRT) is achieved. CCH operation energizes:
MRT is based on outdoor ambient temperature
1. First time line voltage is applied and compressor
(T4), for example:
discharge temperature T5 < 53.6°F.
— MRT is 4 hours when: T4 < 23°F
2. Compressor stops running for 3 hours (outdoor
— MRT is 2 hours when: 23°F ≤ T4 < 40°F ambient temperature T4 < 41°F OR compressor
discharge temperature T5 < 53.6°F).
3. After the high pressure saturation temperature
drops below 82°F for 20 minutes. CCH operation de-energizes:

Defrost will terminate once outdoor coil temperature 1. Compressor discharge temperature T5 ≥ 60.8°F.
(T3) reaches 64°F for a period of 1 minute or defrost 2. Compressor starts running.
time has exceeded 8 minutes.

Defrost Termination Settings (SW5) offers different

15.6 Reversing Valve Operation
defrost termination options for enhanced defrost for (Heat Pump Only)
different geographical and outdoor conditions.
Reversing valve energizes during heat mode and
de-energizes in cool mode.

NOTE
During a heat call on first time operation the unit
SW5 will run about 1 minute in cooling to build up
ON pressure for reversing valve to change.
OFF 1 2

Figure 15-2 15.7 Protection Functions

Outdoor coil temperature protection (T3)
Defrosting Choice SW5-1 SW5-2 Remarks
i. If T3 > 143.6°F, compressor is de-energized.
Operating time is Defrosting extended ii. If T3 < 129.2°F, compressor is energized.
ON
reduced by 10% for 60 seconds
Ambient temperature protection (T4)
OFF OFF OFF Default
i. If 40°F≤ T4<125°F, unit can operate in cooling.
Remarks Remarks Remarks ii. If 5°F ≤ T4 < 86°F, unit can operate in heating(heating mode).
iii. If T4 < 5°F, heat pump will provide 24V control
Table 15-2 to indoor unit energizing electric heat (if installed).
Manual Defrost: Discharge Temperature (DT) protection (T5)
1. The system must have a call for heat and have i. If DT > 239°F during cooling mode, the
been operating for a minimum of 8 minutes. compressor will stop.
2. Press “Force” button on inverter board for 6 ii. If DT < 194°F during cooling mode, the
seconds to begin forced defrost. compressor will restart.
iii. If DT > 221°F during heating mode, the
3. Wait approximately 40 seconds for defrost to compressor will stop.
initiate. iv. If DT < 167°F during heating mode, the
4. Once defrost initiates, the display will indicate compressor will restart.
“dF”. High Pressure (HP) protection (mechanical
5. Defrost test will terminate automatically, after open/close pressure switch)
which the display will indicate running speed. i. High Pressure Switch opens at P > 580 PSIG,
6. If a second defrost test is required, repeat steps the compressor and outdoor fan stop.
2-5 after 5 minutes. ii. High Pressure Switch closes at P < 435 PSIG,
the compressor and outdoor fan restart.

15.5 Compressor Crankcase Low Pressure (LP) protection

Heater Description i. If Low Pressure < 43.5 PSI for 5 minutes during
cooling mode, the compressor and outdoor fan
Refrigerant migration during the OFF cycle can result in will stop.The system will attempt to run again
noisy start-ups, therefore a CrankCase Heater (CCH) is after 6 minutes.
used to minimize refrigerant migration thereby ii. If condensing temp. Tc < outdoor ambient temp.
minimizing start-up noise and/or bearing “wash out”. All T4 during heating mode, the compressor and
CCHs must be installed on the lower half of the outdoor fan will stop.
compressor shell. Its purpose is to warm the compressor
during the OFF cycle, driving refrigerant from Control board temperature protection (TF)
compressor. After extended shutdown periods in cold i. If TF > 176°F, the compressor and outdoor fan
weather, it is recommended to allow CCH to be will stop.
energized for at least 12 hours prior to compressor ii. If TF < 154°F, the compressor and outdoor fan
operation by applying line voltage to heat pump with will restart.
thermostat OFF.

19
15.8 Fault Code Table

Code Fault Description (Sensor)

C3 The coil sensor is seated fault in cooling (T3)
E4 Temperature sensor fault (T3, T4, T5, TF)
E5 High/low voltage protection
E6 DC fan motor fault(Only applicable in 48K/60K)
E7 Compressor discharge sensor is seated fault (T5)
E9 EEPROM fault
H0 Communication fault in main control chip
H5* 5 times (P2) protection in 100 minutes, system lockout
H8 Pressure transducer fault (PT)
P0 Control board temperature protection (TF)
P1 High pressure switch protection (HPS)
P2 Low pressure protection in cooling or heating (PT)
P3 Compressor over current protection
P4 High compressor discharge temperature protection (T5)
P5 Condensor coil temperature protection in cooling (T3)
P8 DC fan motor hurricane/typhoon protection
PH Low discharge superheat protection
F1 High pressure switch protection (HPS)
L0-L9 The IPM module protection
AtL Ambient temperature Limited

System Protection Status Codes**

Forced operation mode

L Running indication under T3 limited condition
D Running indication under T5 limited condition
P Running indication under compressor ratio limited condition
F Running indication under TF limited condition
C Running indication under current limited condition
U Running indication under low voltage limited condition
A Running indication under return oil mode
dF Running indication under defrost mode(Heat Pump Only)

Table 15-3

* Fault requires hard restart

** If the first digit shown on the control board LED is one of the following protection codes (followed by two numerical digits which
show the current compressor frequency in Hz), the unit will continue to run but in a limited condition. The only exception is when
the system is in defrost mode, which only displays "dF" (without any numerical digits following).

20
15.9 Parameter Point Check Table
To display system parameters, press the “Check” button to index through the series of parameters available. The first time
you press the “Check” button, it will display the sequence, and after 1 second it will display the value of the parameter. If
you press the “Check” button again, it will display the next sequence. Refer to Figure 15-3 and 15-4 for check button
location on the control board.

Normal Status, last two digits will display under the following conditions
i. Unit not operating (Standby Mode); “outdoor ambient temperature”.
ii. Unit operating; displays “compressor operating frequency”.

After 20 seconds on same parameter, the display will revert back to normal status.

If a system protection is active, first digit will display “status code”.

No. Point check content Example Remark

0 Outdoor unit capacity H3 H3=3 ton
0 standby,
1 Outdoor unit mode 2 2 cooling,
3 heating(Heat Pump Only)
2 Outdoor unit set compressor speed (Hz) 66
3 T3 (outdoor coil temp.) (°F)
4 T4 (outdoor ambient temp.) (°F)
5 T5 (compressor discharge temp.) (°F)
6 Reserve
7 Reserve
8 Tf (module temp.) (°F)
9 Pe (evaporating pressure) (PSI) Low Suction Pressure
10 Pc (condensing pressure) (PSI) High Head Pressure

Tes target of the evaporating temp.

11
(only use for cooling mode) (°F)

12 Te (evaporating temp.) (°F)

Tcs target of the condensing temp.

13
(only use for heatling mode) (°F)

14 Tc (condensing temp.) (°F)

Target of the compressor discharge superheat

15
(only use for heating mode) (°F)

16 Compressor discharge superheat (°F)

17 Openings of EEV Heat Pump Only
18 Fan speed
19 Compressor current (A)
20 AC voltage of power input (V)
21 DC voltage (V) of compressor input
22 Continuous running time of the compressor (min)
23 Last fault code 00
24 Software version 01
25 Remark“--” -- --

Table 15-4

21
 （Heat Pump Only）

（Heat Pump Only）

Main Control Board for 48/60 ODU Model

19

18
17
21 16
24 23 22 20 15 No. Function description
1 Pressure equalizer valve port
2 Compressor crankcase heater port
3 Reversing valve port（Heat Pump Only）
14 4 Thermostat wire connections

25 13 5 EEV port（Heat Pump Only）

12 6 Reserve
11 7 TF reserve
10 8 T3 T4 sensor port
26 9
9 Pressure transducer port
8
27 10 T5 sensor port
7
28 11 Reserve
6 12 Reserve
5 13 Reserve
14 High pressure switch port
4
15 USB port
3
16 SW2 FORCE BUTTON
17 SW3 CHECK BUTTON
18 J2 Dip SWITCH: Select capacity
19 SW5 Dip SWITCH:Defrost logic settings
20 SW4 Dip SWITCH:Control logic settings
21 Reserve
22 IC20: EEPROM Chip
23 LED
24 IC14: Drive EEPROM Chip
29
2 25 ECM motor port
1 26 Compressor: W port
30
27 Compressor: V port
28 Compressor: U port
29 Power input
30 Power input

*The photo is provided for reference purposes only, Layout and components will vary according to the unit specification.

Figure 15-4

23
15.11 Error Code Troubleshooting
P5 (Condenser coil temperature (T3) protection in cooling)
Diagnosis Handling
Error Code Description (Sensor)
P1 High pressure switch (HPS) protection
NO
Check whether the service
Condenser coil temperature (T3) Open the service valves
P5 valves are open
protection in cooling
P3 Compressor over current protection YES

Table 15-5 Check whether T3 is normal

NO
according to Table 15-14
Replace the T3 sensor
(between temperature and
P1 (High pressure switch (HPS) protection)
resistance)
Diagnosis Handling YES

Check whether outdoor unit

NO YES
Check whether the service motor is abnormal or whether Replace the fan or
Open the service valve the outdoor condenser coil remove all the barriers
valves are open
is blocked

YES NO

Check whether there is short YES

Check whether the switch NO Reseat the wires
circuit in air outlet and inlet Do something to avoid air
wires are seated normally according to wiring
side return short circuit
diagram
NO
YES

Check whether the charge is

NO NO
Check whether high correct by subcooling accord- Adjust refrigerant charge
Replace high pressure ing to installation guide in
pressure switch is closed
switch charge mode when cooling

YES YES

Check whether indoor and NO Check whether there is NO

Exclude all fault reasons Adjust or repair the TXV
outdoor units are normal by normal throttle
and restart throttle
valve, filter and airflow

YES YES

Cooling mode refers to P5 Figure 15-6

Figure 15-5

24
 P3 (Compressor over current protection) P0 (Control board temperature (TF) protection)

Diagnosis Handling Diagnosis Handling

NO YES
Check whether the service Check for dust or debris
Open the service valve Clean all the dust and debris
valves are open blocking radiator

YES NO

Check whether outdoor unit Check whether the YES

YES Replace the fan or
motor is abnormal and the fastening screw of the Retighten the screw
outdoor condenser coil is remove all the barriers
module is loose
blocked
NO NO

NO Restart system and check NO

Check whether compressor Wire correctly according to whether the fan and motor Replace the fan and motor
wiring is normal the wiring diagram can operate normally

YES YES

Check whether compressor YES Operate system and check YES

insulation resistance is greater Replace the compressor whether there`s the same Operate normally
than 100KΩ fault

No YES

Restart system and check whether

the difference of high and low
NO Figure 15-8
Replace the compressor
pressure is more than 30 PSI after
compressor has run for 10 mins
Error Code Description
YES
Low pressure (PT) Protection in cooling
P2
Check whether the and heating
compressor current is more NO
Replace the board System lockup, 5 times (P2) protection in
than 15A for 2/3 ton and 20A H5
for 4/5 ton when protected 100 minutes

YES High compressor discharge temperature

P4
(T5) protection

Replace the compressor Table 15-7

Figure 15-7 P2 ( Low pressure (PT) Protection in cooling and heating)

H5 (System lockup, 5 times (P2) protection in 100 minutes)
Diagnosis Handling
Error Code Description
High module radiator temperature (TF)
P0
protection NO
Table 15-6 Are service valves opened? Open the service valves

YES

Do superheat and subcooling

NO
meet required values? (Refer
Adjust charge
to section 14 system charge
adjustment)
YES

Are the TXV, blower fan motor

NO
working properly? Is there any Fix all these and restart
blockage on filter? Are the EEV the system
and outdoor fan motor working
properly?
YES

Is the pressure transduce

working properly? Compare the NO
Replace the pressure
data between pressure
transducer
measurement and No 9 (cooling)
or No 10 (heating) values
(by press check button).
YES

Figure 15-9

25
 P4 (High compressor discharge temperature (T5) protection) Error Code Description
Diagnosis Handling Temperature sensor fault
E4
(T3, T4, T5, TF)
NO H8 Pressure transducer (PT) fault
Check whether the service
Open the service valve
valves are open
F1 High pressure switch (HPS) fault
YES

Check whether the T5 is Table 15-8

NO
normal according to Table
Replace the T5 sensor
15-15(between temperature
E4 (Temperature sensor fault (T3, T4, T5)
and resistance)
YES Diagnosis Handling

Check whether outdoor and Check whether sensor

YES NO
indoor unit motor is abnormal Replace the fan or T3/T4/T5 are seated Reseat the sensor
or whether coils(outdoor and remove all the barriers and normal according to wiring diagram
indoor) are blocked
NO YES

Check whether the charge is Unplug the sensor, check

NO NO
correct by subcooling whether the resistance of
Adjust the charge Replace the fault T3/T4
according to installation guide T3/T4 is in the range of
in charge mode when cooling sensor
Table 15-14
YES YES

Check whether the EEV/TXV is NO Re-power and check Unplug the sensor, Check
NO
normal for throttle again,if the same, replace whether the resistance of
Replace the fault T5
(wire seated .coil) the EEV/TXV. T5/Tf is in the range of
sensor
Table 15-15
YES YES

Check whether the compressor NO Check whether the display NO

is normal (abnormal noise, Replace the compressor shows the same error code Keep running
abnormal vibration) when re-powered on
YES YES
Note: Replace control board if display
jump from E4 to Herz
Figure 15-11
Figure 15-10

H8 (Pressure transducer (PT) fault)

Diagnosis Handling

Check whether pressure NO Wire according to the

transducer(PT) wiring are
diagram correctly
seated and normal

YES

Is the pressure transducer

NO
working properly? Compare Replace the pressure
the data between pressure transducer
measurement and No 9
(cooling) or No 10 (heating)
check point value
(by pressing check button)
YES

NO
Check whether there is the
Keep running
same fault

YES

Figure 15-12

26
 F1 (High pressure switch (HPS) fault E7 (Compressor discharge sensor (T5) is seated fault)
Diagnosis Handling Diagnosis Handling

Check whether compressor

NO NO
Check whether the service discharge sensor (T5) is Reseat the sensor to
Open the service valve
valves are open seated to the compressor discharge tube
discharge line
YES YES

Check whether high pressure NO Check whether the sensor of NO Wire according to the
Wiring according to the T3/T5 are connected
switch (HPS)wiring is seated wiring diagram correctly
diagram correctly according to wiring diagram
and normal

YES YES

Check whether the NO Check whether the resistance NO

resistance of HPS is close to Replace high pressure of T3/T5 is in the range of Replace the fault T3/T5
0KΩ switch Table 15-14 and Table 15-15 sensor

YES YES

NO Check whether there are NO

Check whether there is the Remove all the other
Keep running other heat sources around
same fault heat sources
T3/T5

YES YES

Figure 15-13 NO
Check whether there is the Keep running
same fault

Error Code Description

Condenser coil sensor (T3) is seated fault
C3 Figure 15-15
in cooling
Compressor discharge sensor (T5) is
E7
seated fault Error Code Description

Table 15-9 E6 DC fan motor fault(Only applicable in

48K/60K)
C3 (Condenser coil sensor (T3) is seated fault in cooling) Table 15-10
Diagnosis Handling
If the E6 error code appears occasionally, no action is
necessary. The system will restart automatically after 6
Check whether condenser NO
minutes.
coil sensor (T3) is seated Reseat the sensor to
to the condenser coil condenser coil
E6 (DC fan motor fault)
YES
Diagnosis Handling

Check whether the T3/T4 NO Wire according to the Check whether DC motor
sensors are connected wiring diagram correctly NO Reseat the wiring
wiring is reliably connected
according to wiring diagram according to
according to the wiring
wiring diagram
YES diagram
YES
Check whether the NO
Replace the fault
resistance of T3/T4 is in NO
T3/T4 sensor Check whether outdoor coil
the range of Table 15-14 Remove all the barriers
air return is blocked
YES
YES
Check whether there are NO
other heat sources around Remove all the other Check whether the voltage NO
T3/T4 heat sources between +15V&N is in the Replace the control board
range 14-18Vdc
YES
YES

Check whether there is the NO

Keep running NO
same fault Check whether there is the
Keep running
same fault
YES
YES

Figure 15-14 Figure 15-16

27
Error Code Description E5 (High/low voltage protection)
Diagnosis Handling
E9 EEPROM fault

Check whether the power NO

H0 Communication fault in main control chip Make sure the power
supply voltage is between
172-270V supply is within correct
range
E5 High/low voltage protection
YES

Table 15-11 Check whether the power

wires are connected firmly NO Replace the power supply
If error codes E9/H0/E5 appear occasionally and after and whether the power wires or connect the power
the system restarts and runs normally after the power supply wires diameter supply wires well
supply is re-established, no action is necessary. meets the requirements from
Otherwise the system must be checked. the manufacturer
YES

E9 (EEPROM fault) Restart to the power supply

NO
Diagnosis Handling and check whether the
Replace the control board
compressor operates
normally
NO YES
Check whether the wiring Reseat the wiring according
is connected normally to wiring diagram
Gauge and check whether
NO
there is 380V DC between
YES Replace the control board
the terminals P & N when
the compressor is running
Restart to power on and NO YES
Reseat the wiring according
check whether it is normal to wiring diagram
Check whether there is high YES Separate high-power
YES The fault is voltage equipment nearby equipment and power
supply
still present
No action is necessary. This
fault may be caused by strong NO
interference from the electric Replace the control board
grid. The system will recover
when the electric supply Figure 15-19
stabilizes.
Note: Refer to wiring diagram for P&N location

Figure 15-17

H0 (Communication fault in main control chip)

Diagnosis Handling

Check whether the wiring is

NO
connected normally Reseat the wiring according
to wiring diagram

YES

Restart to power on and NO

check whether it is normal Replace the control board

YES

No action is necessary. This

fault may be caused by strong
interference from the electric
grid. The system will recover
when the electric supply
stabilizes.

Figure 15-18

28
 Error Code Description Error Code Description

L0-L9 IPM module protection AtL Ambient Temperature Limited

Table 15-12 Table 15-13

When error codes L0-L9 appears occasionally, no action

is necessary. The system will restart automatically after 6 NOTE
minutes.
When the ambient temperature returns to within
the operating range, the system will recover
L0-L9 ( IPM module protection) automatically.
Diagnosis Handling

AtL (Ambient Temperature Limited)

NO
Check whether the service Diagnosis Handling
Open the service valves
valves are open

Check whether the ambient

YES YES
temperature is beyond the
Normal
range cooling: 40°F-120°F
NO Reseat the wiring heating: 5°F-86°F
Check whether the
compressor wiring is normal accordingto wiring NO
diagram

YES Check whether sensor T4 is NO

seated and normal (T4 for Reseat the sensor according
Heat Pump only) to wiring diagram
Check whether compressor NO
insulation resistance is Replace the compressor YES
greater than 100KΩ

YES Unplug the sensor, Check NO

whether the resistance of T4 Replace the fault T3/T4
is in the range of Table 15-14 sensor
Check whether the resistance NO
of compressor U/V/W are Replace the compressor YES
normal

YES
No action is necessary.
Try to restart the system.
Check whether there is the NO
Keep running
same fault
Figure 15-21
YES

Replace the board and NO

check whether there is the Keep running
same fault.

YES

YES Check whether there is NO

Keep running
normal throttle

Figure 15-20

29
15.12 Temperature and Resistance Relationship Tables (for Sensors)

TEMP F TEMP C RESISTANCE kΩ VOLTS DC TEMP F TEMP C RESISTANCE kΩ VOLTS DC

-5 -20.6 107.732 4.65 90 32.2 7.225 2.36
0 -17.8 93.535 4.60 95 35.0 6.401 2.21
5 -15.0 79.521 4.54 100 37.8 5.683 2.07
10 -12.2 67.795 4.47 105 40.6 5.057 1.93
15 -9.4 57.948 4.39 110 43.3 4.509 1.79
20 -6.7 49.652 4.30 115 46.1 4.028 1.67
25 -3.9 42.645 4.21 120 48.9 3.606 1.55
30 -1.1 36.710 4.10 125 51.7 3.233 1.43
40 4.4 27.386 3.86 130 54.4 2.902 1.32
45 7.2 23.732 3.73 135 57.2 2.610 1.22
50 10.0 20.610 3.59 140 60.0 2.350 1.13
55 12.8 17.939 3.45 145 62.8 2.119 1.04
60 15.6 15.648 3.30 150 65.6 1.914 0.96
65 18.3 13.681 3.15 155 68.3 1.731 0.88
70 21.1 11.987 2.99 160 71.1 1.574 0.82
75 23.9 10.527 2.83 165 73.9 1.416 0.75
80 26.7 9.265 2.67 170 76.7 1.276 0.68
85 29.4 8.172 2.52

Table 15-14 for T3, T4

30
15.13 Temperature and Resistance Relationship Tables (for T5 Sensor )

TEMP F TEMP C RESISTANCE kΩ VOLTS DC TEMP F TEMP C RESISTANCE kΩ VOLTS DC

-5 -20.6 600.134 4.93 140 60.0 13.643 3.14
0 -17.8 505.551 4.92 145 62.8 12.359 3.03
5 -15 427.463 4.91 150 65.6 11.214 2.91
10 -12.2 362.739 4.89 155 68.3 10.227 2.80
15 -9.4 308.891 4.87 160 71.1 9.308 2.68
20 -6.7 265.398 4.85 165 73.9 8.485 2.56
25 -3.9 227.481 4.83 170 76.7 7.746 2.45
30 -1.1 195.601 4.80 175 79.4 7.105 2.34
35 1.7 168.707 4.77 180 82.2 6.504 2.23
40 4.4 146.695 4.74 185 85.0 5.963 2.13
45 7.2 127.258 4.70 190 87.8 5.474 2.02
50 10.0 110.707 4.66 195 90.6 5.032 1.92
55 12.8 96.572 4.61 200 93.3 4.645 1.83
60 15.6 84.465 4.56 205 96.1 4.280 1.73
65 18.3 74.411 4.51 210 98.9 3.949 1.64
70 21.1 65.408 4.45 215 101.7 3.648 1.56
75 23.9 57.634 4.39 220 104.4 3.383 1.48
80 26.7 50.904 4.32 225 107.2 3.133 1.40
85 29.4 45.258 4.24 230 110.0 2.904 1.32
90 32.2 40.152 4.16 235 112.8 2.694 1.25
95 35.0 35.699 4.08 240 115.6 2.503 1.18
100 37.8 31.807 3.99 245 118.3 2.334 1.12
105 40.6 28.398 3.89 250 121.1 2.172 1.06
110 43.3 25.506 3.80 255 123.9 2.024 1.00
115 46.1 22.861 3.70 260 126.7 1.888 0.95
120 48.9 20.529 3.59 265 129.4 1.767 0.90
125 51.7 18.47 3.48 270 132.2 1.651 0.85
130 54.4 16.708 3.37 275 135.0 1.544 0.80
135 57.2 15.085 3.26 280 137.8 1.446 0.76

Table 15-15 for T5

31
 PO W

LOW
RE S

TXV
VO L
UPP

STU
TAG
LY O

CK O
CON
E WIR
R HIG

PEN

SER
SYSTEM FAULTS

REF
TRO
WHA

ING

INEF

VICE
H VO

REF

OF N
.CIR
INEF

RES

REF
L BO
T TO

HPS
REV
RES

EEV
OR T

RES

.UND DIATOR

PT S
FICIE

T3 S
T4 S

T5 S
LTAG

EED

Tf SE R DEF.
.RES

VALV EAKING
.OVE
FICIE

O.D.R
ARD

SEN
OR C
OR C DEF.
O.D.A LOW
CHE

REV
HER

ENS
ENS

ENS
ENS
I.D.A

ERC
NT O

TO A
TRIC

NSO
E WIR

E LE
RCH
NT C
OR W .

SOR
A
CK M

I.D.F

L
OIL
OIL D
MOS

OR D
OR D

O
OR D
IRFL
IRF

HAR
.D.FA

DJU

R DE
TION

AKIN
ARG
OMP
INGS

DEF
RES
USE
ODE

TAT

OW

GE

EF.
EF.
EF.

EF.
ST
E

F.
S
N

.
C P S
Display shows nothing
H P S
C P P S S
System won't start SS
H P P S S
SYSTEM C P P P P S S S S
Capacity is insuffciency
H P P P P S S S S
C P
Display is not normal when running
H P
Cool when heating requirement H P S
C P P S P
P1 H P S P
C P P S S
P2/H5 H P P S S
C P P S P
P3 H P S P
C P P S S S
P5 H S
REFRIGER
C P P S
ANT P0 P P S
H
CIRCUIT C P S S
P4
H P S S
C P P S S
PH
H P P S
C3(T3 is seated fault) C P S
C S P
E7(T5 is seated fault) S P
H
C S
ATL(Ambient temp. beyond the license) S
H
C P P P P
E4
H P P P P
C P
H8
H P
C S P
F1
H P
C S P
E6 H S P
ELECTRIC C P
P6 H P
AL OR C
P8
CONTROL H
C S P
L0-L9 H S P
C P
E9 H P
C P
H0 H P
C P S
E5 H P S

Table 15-16

C-Cooling REV.-Reversing Valve

H-Heating PT-Pressure Transducer
P-Primary Causes T3-Outdoor coil temp. sensor
S-Secondary Causes T4-Ambient temp. sensor
Comp.-compressor T5-Comp. discharge temp. sensor
RES.-Restrictions Tf-Module radiator fin temp. sensor
REF.-Refrigeration HPS-High pressure switch
DEF.-Defective RES I.D. AIRFLOW -Perhaps failue of fan motor or fan capacitor or filter
CIR.-Circuit RES O.D. AIRFLOW -Perhaps failue of fan motor or fan capacitor or recirculation
EEV-Electronic expansion valve or blocking coil
RES O.D. RADIATOR-Perhaps failue of blocking radiator

32
16123000A31011 V1.0
印刷技术要求

材质 80g双胶纸
规格 210*297(双面)
颜色 黑白
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