Multi Variable Air Conditioners Ducted Type Indoor Unit
20
9 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.
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.
Poor cooling
① The filter is dirty.
② Too heavy a heat load of room(e.g. too many people in the room)
③ Door
s or windows are
open.
④ Inlet and outlet of IDU are blocked.
⑤ Temperature is set too high.
⑥ Refrigerant is low (e.g. refrigerant leakage)
Poor heating
① The filter is dirty.
② Doors or windows
are open.
③ Temperature is set too low.
④ Refrigerant is low (e.g. refrigerant leakage)
① At startup, the IDU fan will not operate until the heat exchanger (indoor coil)
becomes hot, to prevent cold air delivery.
② In Defrost, the IDU fan stops because the system temporarily switches to
the cooling mode, this prevents cold air deliverey, the fan will resume
operating after defrosting.
NOTICE!
If the air conditioner still fails to work normally after checking and handling as described
above, please stop using it immediately and contact a licensed HVAC technician for assistance.
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