Fujitsu AS*A09LKC Service Instructions Manual page 47

Trouble shooting 23
Outdoor Unit - No Power
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.
OK
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
Momentary power failure ----- Check if there is a defective contact or leak current in
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.
OK OK
Check Point 3 : Check electrical components
Check the voltage of power supply.
>> Check if AC198(AC220V-10%) - 264V(AC240V+10%) appears
at outdoor unit terminal L - N.
OK
Check Fuse(F201) on terminal board.
>> If Fuse is open, check loose terminal, and replace Fuse.
Check Varistor on Filter PCB (VA1 - 2).
>> If Varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power voltage.
OK
If Check Point 1 ~ 3 do not improve the symptom, replace Inverter PCB,
Forecast of Cause:
1. Power supply failure
3. Electrical components defective
power supply system.
the power supply system.
2. External cause
02-25
NO