Model (Btu/h)

Type

24K

36K

60K

Outdoor unit

●

●

●

Working Voltage

198V ~ 253V

Voltage Imbalance

Within a 3% deviation fromeach voltage at the mainterminal of outdoorunit

Starting Voltage

Higher than 85%of the Rated Voltage

Type

Mode

Outdoor operating temperature

maximum

minimum

DC-Inverter Split Air Conditioner

(Heat pumptype)

Cooling Operation

114.8℉ (46℃)

5℉ (-15℃)

Heating Operation

75℉ (24℃)

-13℉ (-25℃)

Model (Btu/h)

Outdoor Unit

24K

Outdoor unit

Power supply

Applicable voltage

ELB

Voltage(V)

PH

Frequency (Hz)

Umin (V)

Umax (V)

Nominal Current (A)

Nominal Sensitive

Current (mA)

24K

208/230

1

60

198

253

25

30

36K

208/230

1

60

198

253

35

30

60K

208/230

1

60

198

253

60

30

List of components

1

Compressor

7

Electronic expansion valve

2

Discharge temperature sensor

8

Stop valve (Liquid)

3

4-Way valve

9

Stopv valve (Gas)

4

Outdoor heat exchanger

10

One-way valve

5

Coil temperature sensor

11

Strainer

6

Ambient temperature sensor

12

Pressure sensor

Model

Refrigerant

precharged before shipment (oz.)

Total refrigerant pipe length

0ft.～25ft.

Long than 25ft.

24K

70.5

0

Xg = 0.38oz/ft ×(Total pipe length(ft.) -25)

36K

98.7

0

Xg = 0.38oz/ft ×(Total pipe length(ft.) -25)

60K

142.9

0

Xg = 0.60oz/ft ×(Total pipe length(ft.) -25)

Troubleshooting

Possible Reasons of Abnormality

How to Deal With

Air conditioner cannot start up

1. Power supplyfailure;
2. Trip of breaker or blow of fuse；
3. Power voltageis too low;
4. Improper setting of remote controller ;
5. Remote controller is short of power.

1. Check powersupply circuit;
2. Measure insulation resistance to ground to see if there is any leakage;

3. Check if there is a defective contact or leakcurrent in the power supply circuit;

4. Check andset remote controller again;

5. Change batteries.

The compressor starts or stops frequently

The air inletand outlet has been blocked.

Remove block obstacles.

Poor cooling/heating

1. The outdoorheat exchanger is dirty, such as condenser;
2. There are heating devicesindoors；

3. The air tightness is not enough, and people come in and outtoo frequently;

4. Block of outdoor heatexchanger;

5. Improper settingof temperature.

1. Clean the heat exchanger of the outdoor unit, such as condenser ;
2. Remove heatingdevices;
3. Keep certain air tightness indoors;
4. Remove blockobstacles;
5. Check and try to set temperature again.

Sound from deforming parts

During systemstarting or stopping, a sound might be heard. However, this is due to thermal deformation of plastic parts.

It is not abnormal, and the soundwill disappear soon.

Water leakage

1. Drainage pipe is blocked or broken;
2. Wrap of refrigerant pipe joint is not closed completely.

1. Change drainage pipe;
2. Re-wrap and make it tight.

Fault code

Fault description

Possible reasons for abnormality

How to deal with

Remarks

1

Outdoor ambient temperature sensor fault

1. The outdoor ambient temperature sensor is connected loosely;
2. The outdoor ambient temperature sensor fails to work;
3. The sampling circuit fails.

1. Reconnect the outdoor ambient temperature sensor;
2. Replace the outdoor ambient temperature sensor components;
3. Replace the outdoor control board components.

2

Outdoor coil temperature sensor fault

1.The outdoor coiltemperature sensor is connected loosely; 2.The outdoor coil temperature

sensor fails to work; 3.The sampling circuitfails.

1. Reconnect the outdoor coil temperature sensor;
2. Replace the outdoor coil temperature sensor components;
3. Replace the outdoor control board components.

3

The unitover-current turn off fault

1. Control boardcurrent sampling

circuit fails;

1. The currentis over highbecause the supply voltage is too low;
2. The compressor is blocked;
3. Overload in cooling mode;
4. Overload in heating mode.

1. Replace the electrical control board components;
2. Normal protection;
3. Replace the compressor;
4. Please see NOTE 3;
5. Please see NOTE 4.

4

EEprom Dataerror

1. EE components fails;
2. EE components control circuit fails;
3. EE components are inserted incorrectly.

1.Replace the EE components; 2.Replace the outdoor control

board components; 3.Reassemble the EE

components.

5

Cooling freezing protection (the indoor coil temperature is too low) or heating overload (indoor coil temperature is too high)

1. The indoorunit can notblow air normally;
2. The roomtemperature is too low in cooling mode or the room temperature is too high in heating;
3. The filter is dirty;
4. The ductresistance is toohigh to result in low air flow;
5. The setting fan speed is too low; 6.The indoor unit is not installed in accordance with the installation

standards, andthe air inletis too close to the air outlet .

1. Check whetherthe indoor fan, indoor fan motor and evaporator work normally;
2. Normal protection; 3.Clean the filter;
3. Check the volume control valve, duct length etc.;
4. Set thespeed with highspeed; 6.Reinstall the indoor unit

referring to the usermanual to change the distance between the indoor unit and the wall or ceiling.

7

The communication fault between the indoor unit and outdoor unit

1. The connection cable is connected improperly betweenthe indoor unit and outdoor unit;

2. The communication cable is connected loosely;

3. The communication cable fails; 4.The indoor control board fails; 5.The outdoor control board fails; 6.Communication circuit fuseopen; 7.The specification of

communication cable is incorrect.

1. Reconnect the connection cable referring to the wiring diagram;
2. Reconnect the communication cable;
3. Replace the communication cable;
4. Replace the indoor control board;
5. Replace the outdoor control board;
6. Check the communication circuit, adjust the DIP switch and the short-circuit fuse;
7. Choose suitable communication cable

referring to the user manual.

13

Compressor overheat protector device

1. The wiring of the overload protector is connected loosely.
2. The overload protector fails.
3. The refrigerant is not enough;
4. The installation pipe is much longer than the normal one, but extra refrigerant is not added ;
5. The expansion valve fails;
6. The outdoor control boardfails.

1. Reconnect thewiring of the overload protector;
2. Replace the overload protector;
3. Check the welding pointof the unit to confirm whether it is leakage, and then recharge the refrigerant;
4. Add the refrigerant;
5. Replace expansion valve;
6. Replace the outdoor control board.

14

The high pressure switch operation or the unit is turned off for high pressure protection

1. The wiringof the highpressure protector is connected loosely;
2. The highpressure protector fails;
3. The outdoor control board is abnormal;
4. Overload in cooling;
5. Overload in heating.

1. Reconnect thewiring of the high pressure protector;
2. Replace the high pressure protector;
3. Replace the outdoor control board;
4. Please referto NOTE 3;
5. Please referto NOTE 4.

Applied to models with high pressure  switch or pressure sensor

15

The low pressure switch protection or theunit is turnedoff for low pressure protection

1. The wiring of the low pressure switch is connected loosely;
2. The low pressure switchfails;
3. The refrigerant is not enough;
4. The expansion valve fails in heating mode;
5. The outdoor control board is abnormal.

1. Reconnect the wiring of the low pressure switch;
2. Replace the low pressure switch;
3. Check the welding point to confirm whether theunit leaks, and add some refrigerant;
4. Replace the expansion valve;
5. Replace the outdoor control board.

Applied to models with low pressure switch or pressure sensor

16

Overload protection

in cooling mode

System overload

Please referto NOTE 3.

17

Discharge temperature sensor fault

1. The wiring of the discharge

tempe-rature sensoris connected loosely;

1. The discharge temperature sensor fails;
2. The sampling circuit is abnormal.

1. Reconnect the wiring of the discharge temperature sensor;
2. Replace the discharge temperature sensor;
3. Replace the outdoor control board.

18

AC voltage is abnormal

1. The AC voltage>275V or <160V;
2. The AC voltage of sampling circuit on the driver board is abnormal.

1. Normal protection, please check the supply power;
2. Replace thedriver board.

19

Suction temperature sensor fault

1. The wiring of the suction tempe- rature sensor is connected loosely;
2. The suction temperature sensor fails;
3. The sampling circuit is abnormal.

1. Reconnect the wiring of the suction temperature sensor;
2. Replace the suction temperature sensor;
3. Replace the outdoor control board.

22

The defrosting sensor fault

1. The wiringof the defrosting sensor is connected loosely;
2. The defrosting sensor fails; 3.The sampling circuit is abnormal.

1. Reconnect thewiring of the defrosting sensor;
2. Replace the defrosting sensor;
3. Replace the outdoor control board.

43

High Pressure sensor fault

1. The wiring of the high-pressure pressure sensor connect is loose;
2. The high-pressure pressure sensor fails；
3. The sampling circuit of the high-

pressure pressure sensorfails.

1. Reconnect thewiring of the high-pressure pressure sensor;
2. Replace the high-pressure pressure sensor;
3. Replace theoutdoor control board.

45

IPM fault

There are many reasons for this failure. You can check the driver board fault LED to further analyze the faultcode of the drive boardand to learn aboutwhat leads to the fault and how to operate it. Specific information can be seen in table 5, table 6.

See attached "analysis of the driving board fault".

46

IPM and control board communication fault

1. The cablebetween the control board and the driver board is connected loosely;
2. The cablebetween the control board and the driver board fails;
3. The driver board fails； 4.The control board fails.

1. Reconnect the cable between the control board and the driver board;
2. Replace the communication cable between the control board and thedriver board;
3. Replace the driver board; 4.Replace the controlboard.

47

Too highdischarge temperature fault

1. The refrigerant of the unitis not enough;
2. The refrigerant of theunit is not enough due to that the installation pipe is longer;
3. Throttling service fails;
4. The outdoor ambient temperature is too high.

1. Check the welding point to confirm whether the unit has leakage point, and then add some refrigerant;
2. Add somerefrigerant referring to the installation usermanual;

3. Replace the throttling service (such as capillary, expansion valve);

4. Normal protection.

48

The outdoor DC fan motor fault (upper fan motor)

1. The connecting wiring of the up DC fan motor is loose;
2. The cord of theupper DC fan

motor fails;

1. The upper DC fan motor fails;
2. The drivecircuit of theupper DC fan motor fails;
3. The outdoor fan hasbeen blocked.

1. Reconnect the wiring of the up DC fan motor;

2. Replace the upper DC fan motor; 3.Replace the upper DC fan motor; 4.Replace the driver board of the

fan motor;

5.Check the outdoor fan and ensure the outdoor fan can run normally.

49

The outdoor DC fan motor fault (down fan motor)

1.The connecting wiring of the down DC fan motor is loose; 2.The cord of the downDC fan

motor fails;

1. The down DC fan motor fails;
2. The drivecircuit of the down DC fan motor fails;
3. The outdoorfan has been blocked.

1. Reconnect thewiring of the down DC fan motor;
2. Replace the down DC fan motor;
3. Replace the down DC fan motor;
4. Replace the driver boardof the fan motor;
5. Check the outdoor fan and ensure the outdoor fan can run normally.

91

The unitturn off due to the IPM

board overheating fault

1. The outdoor ambient temp.is too high;
2. The speed of the out fan

motor is too low if the fan motor is AC fan motor;

1. The outdoor unit is not installed in accordance with the standard;
2. The supply power is too low.

1. Normal protection;
2. Check the fan capacitor, and replace the fan capacitor if it is a failure;
3. Reinstalled the outdoor unit referring to the installation user manual;
4. Normal protection.

96

Lacking of refrigerant

The refrigerant of the unitis not enough.

Discharge the refrigerant and charge the refrigerant referring to the rating label.

97

4-way valve commutation failure fault

1. The connecting wiring of the 4- way valve coil is loose;
2. The 4-wayvalve coil fails; 3.The 4-way valve fails;

4.The driverboard of the 4-way valve fails.

1. Reconnect thewiring of the 4-way valve;
2. Replace the 4-way valvecoil;
3. Replace the 4-way valve;
4. Replace the driver boardof the way valve.

Overload in coolingmode

sr.

The root cause

Corrective measure

1

The refrigerant is excessive.

Discharge the refrigerant, and recharge

the refrigerantreferring to therating label.

2

The outdoor ambient temperature is too high.

Please use withinallowable temperature range

3

Short-circuit occurs in the air outlet and air inletof

the outdoor unit.

Adjust the installation of the outdoor unit

referring to the user manual.

4

The outdoor heat exchanger is dirty, such

as condenser.

Clean the heat exchanger of the outdoor unit,

such as condenser.

5

The speed of the outdoor fan motor is too low.

Check the outdoor fan motor and fan capacitor.

6

The outdoor fan is brokenor the outdoor fan

is blocked.

Check the outdoor fan.

7

The air inlet and outlet has beenblocked.

Remove the obstructions.

8

The expansion valveor the capillary fails.

Replace the expansion valve or the capillary.

Overload in heating mode

sr.

The root cause

Corrective measures

1

The refrigerant is excessive.

Discharge the refrigerant, and recharge

the refrigerantreferring to the rating label.

2

The indoor ambienttemperature is too high.

Please use it within allowable temperature range.

3

Short-circuit occurs in the air outlet and air

inlet of theindoor unit.

Adjust the installation of the indoor unit referring

to the user manual.

4

The indoor filter is dirty.

Clean the indoor filter.

5

The speed of the indoor fan motor is too low.

Check the indoor fan motor and fan capacitor.

6

The indoor fan is brokenor the outdoor fan

is blocked.

Check the indoor fan.

7

The air inlet and outlet has beenblocked.

Remove the obstructions.

8

The expansion valveor the capillary fails.

Replace the expansion valve or the capillary.

Fault

code

Fault description

Possible reasons for abnormality

How to deal with

1

Inverter DC voltageoverload fault

1. Power supplyinput is too high or too low;
2. Driver boardfault.

1. Check powersupply；
2. Change driverboard.

2

Inverter DC low voltage fault

3

Inverter AC currentoverload fault

4

Out-of-step detection

1. Compressor phaselost；
2. Bad driver board components；
3. The compressor insulation fault.

1. Check compressor wire connection;
2. Change the driver board;
3. Change compressor.

5

Loss phasedetection fault (speed pulsation)

6

Loss phasedetection fault (current imbalance)

7

Inverter IPM fault (edge)

1. System overload or current overload;
2. Driver boardfault;
3. Compressor oil shortage, serious wear of crankshaft ;
4. The compressor insulation fault.

1. Check thesystem.
2. Change the driver board;
3. Change the compressor;
4. Change the compressor.

8

Inverter IPM fault (level)

9

PFC_IPM IPM fault (edge)

10

PFC_IPM IPM fault (level)

11

PFC power detection of failure

1. The power supply is not stable;
2. Instantaneous poweroff;
3. Driver boardfailure.

1. Check the power supply.
2. No need to dealwith.
3. Change the driver board.

12

PFC overload current detection of failure.

1. System overload, current is too high;
2. Driver boardfails;
3. PFC fails.

1.Check the system; 2.Change the driverboard; 3.Change the PFC.

13

DC voltage detected abnormal .

1. Input voltageis too highor too low;
2. Driver boardfails.

1. Check the power supply;
2. Change the driver board.

14

PFC LOW voltagedetected failure.

15

AD offset abnormaldetected

failure.

Driver board fails.

Change the driverboard.

16

Inverter PWM logic set fault.

17

Inverter PWMinitialization failure

18

PFC_PWM logicset fault.

19

PFC_PWM initialization fault.

20

Temperature abnormal.

21

Shunt resistance unbalance

adjustment fault

22

Communication failure.

1. Communication wireconnection is not proper;
2. Driver boardfails;
3. Control boardfails.

1. Check the wiring;
2. Change the driver board;
3. Change the control board.

23

Motor parameters setting of failure

Initialization is abnormal.

Reset the power supply.

26

DC voltage mutation error

1. Power inputchanges suddenly
2. Driver boardfails.

1. Check power supply, to provide stable power supply;
2. Change driverboard.

27

D axis currentcontrol error

1. System overload, phase current is too high;
2. Driver boardfails.

1. Check systemto see if it works normally.
2. Check stopvalve to see if it is open;
3. Change the driver board.

28

Q axis currentcontrol error

1. System overloads, phase current is too high；
2. Driver boardfails.

1. Check systemto see if it works normally.
2. Check stopvalve to see if it is open;
3. Change the driver board.

29

Saturation errorof d axis current control integral

1. System overload suddenly;
2. Compressor parameter is not suitable;
3. Driver boardfails.

1. Check systemto see if it works normally.
2. Check stopvalve to see if it is open;
3. Change the driver board.

30

Saturation errorof q axis current control integral

1. System overload suddenly;
2. Compressor parameter is not suitable;
3. Driver boardfails.

1. Check systemto see if it works normally.
2. Check stopvalve to see if it is open;
3. Change the driver board.

35

EE data abnormal

Driver board EEPROMis abnormal

1. Change EEPROM；
2. Change the driver board.