OPERATING INSTALLATION MANUAL FOR AHU-KIT UNIT
25
8 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
℃
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
℃
.
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.
Notes:
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.
