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9 Troubleshooting
If your air conditioner is not working well, please check the following table first before asking for
service:
Phenomenon
The unit can't start
The unit stops after running
for a while
Poor cooling effect
Poor heating effect
Indoor fan doesn't start
up during heating
NOTE!
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.
Multi Variable Air Conditioners Duct Type Indoor Unit
Power supply is not connected.
Circuit breaker tripping caused by leakage of electricity.
Input voltage is too low.
Defect of main PC-board.
The inlet or outlet of ODU or IDU is blocked by obstacle.
The filter is dirty.
Too heavy heat load of room (e.g. too many people).
Door or windows is open.
Inlet and outlet of IDU are blocked.
Setting temperature is too high.
Refrigerant is insufficient (e.g. refrigerant leakage).
The filter is dirty.
Door or window is open.
Setting temperature is too low.
Refrigerant is insufficient (e.g. refrigerant leakage).
At starting, the IDU fan could not operate till the heat exchange become hot, for
preventing delivering the cool air.
At defrosting, the IDU fan stopped due to system switch to cooling mode for
preventing delivering the cool air, and resume operating after defrosting.
Troubleshooting
26
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