E: 94. Trip Detection (Outdoor Unit) - Fujitsu ABYG18KRTA Service Manual

2-26. E: 94. Trip detection (Outdoor unit)

Wired remote
Indicator
controller
Detective actuator Outdoor unit
Forecast of cause
Check point 1. Check the outdoor unit fan operation, heat-exchanger, ambient temperature
• No obstructions in air passages?
• Heat exchange fins clogged
• Outdoor unit fan motor check
• Ambient temperature not raised by the effect of other heat sources?
• Discharged air not sucked in?
Check point 2. Replace inverter PCB
If Check point 1 do not improve the symptom, change inverter PCB.
Check point 3. Replace main PCB
If Check point 1, 2 do not improve the symptom, change main PCB.
Check point 4. Replace compressor
If Check point 3 do not improve the symptom, change compressor.
2-26. E: 94. Trip detection (Outdoor unit)
Error code
Inverter PCB
Main PCB
Compressor
↓
↓
↓
↓
End
Protection stop by over-current generation after inverter
compressor start processing completed generated
consecutively 10 times.
NOTE: The number of generations is reset when the
compressor starts up.
Outdoor unit fan operation defective, foreign matter on
heat-exchanger, excessive rise of ambient temperature
Main PCB failure
Inverter compressor failure (lock, winding short)
- (03-30) -
E: 94
Inverter PCB
2. Troubleshooting with error code