Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
21
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
Power supply is not connected.
Circuit breaker tripping caused by leakage of electricity.
Input voltage is too low.
Defect of main PC-board.
The unit stops after running for
a while
The inlet or outlet of ODU or IDU is blocked by obstacle.
Poor cooling effect
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).
Poor heating effect
The filter is dirty.
Door or window is open.
Setting temperature is too low.
Refrigerant is insufficient (e.g. refrigerant leakage).
Indoor fan doesn’t start
up during heating
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.
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.
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