Fujitsu RCG24KVLA Service Instruction page 44

Trouble shooting 12
INDOOR UNIT Error Method:
Indoor unit power supply error
for fan motor
Detective Actuators:
Indoor unit Power Supply PCB
Forecast of Cause :
1. External cause
Check Point 1 : Check external cause at lndoor and Outdoor (Voltage drop or Noise)
Instant drop : Check if there is a large load electric apparatus in the same circuit.
Momentary power failure : Check if there is a defective contact or leak current in the power supply circuit.
Noise : Check if there is any equipment causing harmonic wave near electric line.
(Neon bulb or electric equipment that may cause harmonic wave)
Check the complete insulation of grounding.
OK
Check Point 2 : Check connection of Connector
Check if connector is removed.
Check erroneous connection.
Check if cable is open.
>>Upon correcting the removed connector or mis-wiring, reset the power.
OK
Check Point 3 : Replace Power supply PCB
If Check Point 1, 2 do not improve the symptom, replace Power supply PCB.
Indicate or Display:
Error code : 39
Detective details:
When a momentary power cut off.
When do not start fan motor.
2. Connection of connector failure
Outdoor unit : No indication
3. Power Supply PCB failure
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