Trouble shooting 26
Forecast of Cause:
NO
OK
OK
OK
Outdoor unit - No Power
1. Power supply failure
2. External cause
3. Electrical components defective
Check Point 1 : Check installation condition
Isn’t the breaker down?
Check loose or removed connection cable.
>> If abnormal condition is found, correct it by referring to manual.
Check Point 2 :
Check external cause at indoor unit and outdoor unit (Voltage drop or noise)
Instant voltage drop of ----- Check if there is a abnomally large load in the same
power supply power supply system.
Momentary power failure ----- Check if there is a defective contact or leak current in
the power supply system.
Noise ----- Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check whether the ground connection is proper.
Check Point 3 : Check electrical components
If Check Point 1 ~ 3 do not improve the symptom, replace Main Filter PCB,
Inverter Filter PCB Main PCB, and Inverter PCB .
02-28
Check the voltage of power supply.
>> Check if AC198(AC220V-10%) - 264V(AC240V+10%) appears
at outdoor unit terminal , L1 - N, L2 - N, L3 - N.
Check Fuse F50 and F100 on Main PCB.
>> If Fuse is open, check loose terminal, and replace Fuse.
Check Fuse F602 on Main Filter PCB.
>> If Fuse is open, check loose terminal, and replace Fuse.
Check Varistor VA50 and VA51 on Main PCB.
>> If Varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power voltage and replace Main PCB.
Check Varistor VA601, and VA604 on Main Filter PCB.
>> If Varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power voltage and replace Main Filter PCB.
OK
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