Fujitsu ACUH09LUAS1, Service Manual

Page: 78 / 153

2-25. E: 94. Trip detection (Outdoor unit)
Indicator
→ired remote
controller
Error code E: 94
Detective actuator Outdoor unit
Main PCB 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.
Compressor
Forecast of cause
Outdoor unit fan operation defective, foreign matter on
heat-exchanger, excessive rise of ambient temperature
Main PCB failure
Inverter compressor failure (lock, winding short)
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 main PCB
If Check point 1 do not improve the symptom, change main PCB.
Check point 3. Replace compressor
If Check point 2 do not improve the symptom, change compressor.
End
2-25. E: 94. Trip detection (Outdoor unit)
- (03-30) -
2. Troubleshooting with error code
TR
O
U
B
LESH
O
O
TI
N
G
TR
O
U
B
LESH
O
O
TI
N
G