Fujitsu AUXG18KVLA, Service Manual

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2-11. E: 39. Indoor unit power supply error for fan motor (Indoor
unit)
Indicator
Wired remote
controller
Error code E: 39
Detective actuator Indoor unit main PCB
• When a momentary power cut off
• When do not start fan motor
Forecast of cause
External cause
Connector connection failure
Main PCB failure
Check point 1. Check external cause at indoor 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 sup-
ply 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.
↓
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.
↓
Check point 3. Replace main PCB
If check point 1 to 2 do not improve the symptom, change main PCB.
↓
End
2-11. E: 39. Indoor unit power supply error for fan motor (Indoor unit)
- (03-18) -
2. Troubleshooting with error code
TROUBLESHOOTING TROUBLESHOOTING