Trouble Shooting
Before ask for services, please first check your unit against the following. Air conditioner won't start.
Is power supply switch turned on?
Power supply switch is not set at ON.
Is city power supply normal?
Power failure?
Poor cooling or heating
Is leakage current breaker activated?
This is very dangerous, please disconnect power supply immediately and contact your dealer.
Are operation control | Is air filter too dirty? | Are there any obstacles in inlet | |
adjusted correctly |
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| or outlet grill? |
as specified? | Proper |
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temp |
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Are horizontal louvers at up | Any doors or windows left |
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position (in heating mode)? | open? |
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Poor cooling
Is there any direct sunlight in the room? 
Cold air blows out (in heating mode)
If there are unexpected heat sources in the room?
Too many people in the room?
Is air conditioner in standby condition in heating mode?
If your unit still can't work properly after above mentioned checks, or following problems occur, please stop it immediately and contact your dealer.
Fuses or circuit breakers often blow out.
Water comes out in cooling/dry operation. 
Operation is abnormal or sound is heard.
Failure description | Flash times of indoor |
| receiver board |
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Room temp. sensor abnormal | Power LED flashes 1 time |
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Indoor coil temp. sensor abnormal | Power LED flashes 2 times |
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Outdoor temp. sensor abnormal | Power LED flashes 3 times |
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Outdoor coil temp. sensor abnormal | Power LED flashes 4 times |
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Power LED flashes 5 times | |
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High / Low pressure abnormal or Comp. discharging protection malfunction | Power LED flashes 16 times |
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Communication malfunction between indoor and wired controller | Power LED flashes 8 times |
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Communication malfunction between indoor and outdoor abnormal | Power LED flashes 9 times |
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Temperature protection malfunction | Power LED flashes 13 times |
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