Multi Variable Air Conditioners Cassette Type Indoor Unit
22
8 Troubleshooting
The air conditioner is not expected to be serviced by users. Incorrect repair may cause electric
shock or fire, so please contact an authorized service center for professional service. The following
checks prior to contact may save your time and money.
The unit can’t start.
①
Power supply is not connected.
②
Circuit breaker tripping caused by leakage of electricity.
③
Input voltage is too low.
④
Defect of main PC-board.
The unit stops after running
for a while.
①
The inlet or outlet of ODU or IDU are blocked by obstacle.
②
Control loop is abnormal
③
Set the unit in cooling mode when outdoor ambient temperature is higher than
℃
Poor cooling effect.
①
The filter is dirty.
②
Too heavy heat load of room (e.g. too many people).
③
Door or windows is open.
④
Inlet and outlet of IDU are blocked.
⑤
Setting temperature is too high.
⑥
Refrigerant is insufficient (e.g. refrigerant leakage).
Poor heating effect.
①
②
Door or window is open.
③
Setting temperature is too low.
④
Refrigerant is insufficient (e.g. refrigerant leakage).
⑤
Outdoor ambient temperature is lower than -5
℃
.
⑥
Abnormality of control circuit.
Indoor fan doesn’t start up
during heating.
①
At starting, the IDU fan could not operate till the heat exchange become hot, for
preventing delivering the cool air.
②
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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