AHU-KIT
41
9 Troubleshooting
If your air conditioner is not working well, please check the following table first before asking
for service:
Phenomenon
Troubleshooting
The unit can’t start
①
No power supply.
②
Circuit breaker is tripped because of current leakage.
③
Circuit voltage is too low.
④
ON/OFF key sets at the stop position.
⑤
Failure in control system.
The unit stops after running for a while
①
Obstacle in front of the condenser.
②
Abnormal operation of the control system.
③
Outdoor temperature is higher than 43
℃
(109
℉
) when cooling
mode is used.
Poor cooling effect
①
Air filter is dirty or blocked.
②
Too many heating sources or people in the room.
③
Doors or windows are open.
④
Obstacle at the air intake and outlet of the unit.
⑤
Setting temperature is too high or refrigerant is insufficient (e.g.
refrigerant leakage).
⑥
Poor performance of the indoor temperature sensor.
Poor heating effect
①
Air filter is dirty or blocked.
②
Doors or windows are open.
③
Wrong temperature setting (too low).
④
Refrigerant leakage.
⑤
Outdoor temperature is lower than -5
℃
(23
℉
).
⑥
Abnormal operation of the control system.
Indoor fan doesn’t start up during
heating
①
Improper location of tube sensor.
②
The tube sensor inserts not well.
③
The wiring of tube sensor is broken.
④
Electricity leakage of capacitor.
NOTICE!
If air conditioner still fails to work normally after checking and handling as described above,
please stop using it immediately and contact local service center for assistance.
