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:
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.
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.
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.
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