STATUS:
Entire unit stops working
CAUSE:
1 Failure in the card electrical jumper (Jumper).
SOLUTION:
Replace or replace jumper.
STATUS:
Cold: compressor for operation, while indoor unit is running
Heat: all loads for operation.
CAUSE:
Connection cable between indoor unit and outdoor unit 2.
2. Wiring inside the unit
3. Communication circuit of the indoor unit
4. Outdoor unit communication circuit.
SOLUTION:
Check that the communication cable is connected correctly in both units according to the color code / Replace the cable 2.
2. Replace damaged wiring
3. Replace inner board
4. Replace outer board.
STATUS:
Cold: compressor and outdoor. Unit stops running, while indoor fan runs;
Heat: compressor, outdoor fan and indoor fan stops running.
CAUSE:
1. Is refrigerant leaking?
2. Check if the gas valve and outdoor liquid valve The unit opens fully;
3. Is the capillary or electronic expansion valve blocked? 4.
4. Has the indoor unit evaporator temperature sensor fallen out?
5. Has the indoor unit evaporator temperature sensor fallen off?
6. If the cooling system is under high ambient humidity, is what caused a small temperature difference for heat exchange.
SOLUTION:
1. Repair the leak, vacuum and recharge refrigerant to the system.
2. Fully open the valves.
3. If the capillary is blocked, replace the part.
4. Accommodate the evaporator ambient temperature sensor.
5. Accommodate the condenser ambient temperature sensor.
6. Turn the equipment off for 20 min and turn it on again.
STATUS:
Cold: indoor fan runs, while compressor stops operation;
Heat: all loads stop running.
CAUSE:
1. Is refrigerant leaking?
2. Check if the gas valve and outdoor liquid valve The unit is fully opened;
3. Is the capillary or electronic expansion valve blocked? 4.
4. Has the indoor unit evaporator temperature sensor fallen out?
5. Has the indoor unit evaporator temperature sensor fallen off?
6. If the cooling system is under high ambient humidity, is what caused a small temperature difference for heat exchange.
SOLUTION:
1. Repair the leak, vacuum and recharge refrigerant to the system.
2. Fully open the valves.
3. If the capillary is blocked, replace the part.
4. Accommodate the evaporator ambient temperature sensor.
5. Accommodate the condenser ambient temperature sensor.
6. Turn the equipment off for 20 min and turn it on again.
STATUS:
Cold: compressor stops operation, while indoor fan runs.
Heat: all loads stop operation.
CAUSE:
1. COMP compressor terminal
2. Supply voltage
3. Compressor
4. Refrigerant charge quantity
SOLUTION:
1. Replace terminal.
2. If the circuit is restricted, repair and retest. If there are no restrictions and the component still does not work or does not work properly, replace it.
3. Replace compressor
4. Check pressures and set to specification.
STATUS:
The entire unit stops operating.
CAUSE:
1. Is the motor terminal loose?
2. Is the motor damaged?
3. Is the cable connected to the motor damaged?
4. Is the AP 1 control board of the indoor unit damaged?
5. Is the fan blocked?
SOLUTION:
1. Connect the terminal correctly.
2. Replace the evaporator unit motor.
3. Replace the evaporator unit motor.
4. Replace evaporator board.
5. Make sure that the fan is not blocked by a component that is out of place, arrange the component so that it does not obstruct the rotation of the fan.
Compressor High-Pressure Protection
Error display ODU mainboard LED displayer
Error judgment condition and method
It is judged through the action of a high-pressure switch. If the high-pressure switch is cut off, it is judged that
high-pressure is too high and the system stops operation for protection.
Possible reason:
■ Cut-off valve of ODU or IDU is not fully opened.
■ High-pressure switch is abnormal.
■ Outdoor or indoor fan is not working properly.
■ IDU filter or air duct is blocked (heating mode).
■ Ambient temperature is too high.
IPM module current protection
DC fan error
Discharge temperature sensor error
Outdoor fan IPM module protection
STATUS:
Entire unit stops working
CAUSE:
1 Failure in the card electrical jumper (Jumper).
SOLUTION:
Replace or replace jumper.
STATUS:
Cold: compressor for operation, while indoor unit is running
Heat: all loads for operation.
CAUSE:
Connection cable between indoor unit and outdoor unit 2.
2. Wiring inside the unit
3. Communication circuit of the indoor unit
4. Outdoor unit communication circuit.
SOLUTION:
Check that the communication cable is connected correctly in both units according to the color code / Replace the cable 2.
2. Replace damaged wiring
3. Replace inner board
4. Replace outer board.
STATUS:
Cold: compressor and outdoor. Unit stops running, while indoor fan runs;
Heat: compressor, outdoor fan and indoor fan stops running.
CAUSE:
1. Is refrigerant leaking?
2. Check if the gas valve and outdoor liquid valve The unit opens fully;
3. Is the capillary or electronic expansion valve blocked? 4.
4. Has the indoor unit evaporator temperature sensor fallen out?
5. Has the indoor unit evaporator temperature sensor fallen off?
6. If the cooling system is under high ambient humidity, is what caused a small temperature difference for heat exchange.
SOLUTION:
1. Repair the leak, vacuum and recharge refrigerant to the system.
2. Fully open the valves.
3. If the capillary is blocked, replace the part.
4. Accommodate the evaporator ambient temperature sensor.
5. Accommodate the condenser ambient temperature sensor.
6. Turn the equipment off for 20 min and turn it on again.
STATUS:
Cold: indoor fan runs, while compressor stops operation;
Heat: all loads stop running.
CAUSE:
1. Is refrigerant leaking?
2. Check if the gas valve and outdoor liquid valve The unit is fully opened;
3. Is the capillary or electronic expansion valve blocked? 4.
4. Has the indoor unit evaporator temperature sensor fallen out?
5. Has the indoor unit evaporator temperature sensor fallen off?
6. If the cooling system is under high ambient humidity, is what caused a small temperature difference for heat exchange.
SOLUTION:
1. Repair the leak, vacuum and recharge refrigerant to the system.
2. Fully open the valves.
3. If the capillary is blocked, replace the part.
4. Accommodate the evaporator ambient temperature sensor.
5. Accommodate the condenser ambient temperature sensor.
6. Turn the equipment off for 20 min and turn it on again.
STATUS:
Cold: compressor stops operation, while indoor fan runs.
Heat: all loads stop operation.
CAUSE:
1. COMP compressor terminal
2. Supply voltage
3. Compressor
4. Refrigerant charge quantity
SOLUTION:
1. Replace terminal.
2. If the circuit is restricted, repair and retest. If there are no restrictions and the component still does not work or does not work properly, replace it.
3. Replace compressor
4. Check pressures and set to specification.
STATUS:
The entire unit stops operating.
CAUSE:
1. Is the motor terminal loose?
2. Is the motor damaged?
3. Is the cable connected to the motor damaged?
4. Is the AP 1 control board of the indoor unit damaged?
5. Is the fan blocked?
SOLUTION:
1. Connect the terminal correctly.
2. Replace the evaporator unit motor.
3. Replace the evaporator unit motor.
4. Replace evaporator board.
5. Make sure that the fan is not blocked by a component that is out of place, arrange the component so that it does not obstruct the rotation of the fan.
Compressor High-Pressure Protection
Error display ODU mainboard LED displayer
Error judgment condition and method
It is judged through the action of a high-pressure switch. If the high-pressure switch is cut off, it is judged that
high-pressure is too high and the system stops operation for protection.
Possible reason:
■ Cut-off valve of ODU or IDU is not fully opened.
■ High-pressure switch is abnormal.
■ Outdoor or indoor fan is not working properly.
■ IDU filter or air duct is blocked (heating mode).
■ Ambient temperature is too high.
IPM module current protection
DC fan error
Discharge temperature sensor error
Outdoor fan IPM module protection
