Fujitsu General AOHH30KMTB, Service Manual

Page: 61 / 162

2-20. E: 94. Trip detection (Outdoor unit)
Indicator
Indoor unit
Operation indicator 9 time flash
Timer indicator 4 time flash
Economy indicator Continuous flash
Error code E: 94
outdoor unit Refer to "Error code table (Outdoor unit)" on page 03-3
Detective actuator Outdoor unit
Inverter 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.
Main PCB
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)
Inverter PCB
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.
↓
End
2-20. E: 94. Trip detection (Outdoor unit)
- (03-25) -
2. Troubleshooting with error code
TROUBLESHOOTING TROUBLESHOOTING