Daikin F-Series, Service Manual

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SiBE12-713 Troubleshooting
Service Diagnosis 269
5.24 Output Over Current Detection
Remote
Controller
Display
L5
Outdoor Unit LED
Display A
5
1
1
2
1
3
4
4
1
Method of
Malfunction
Detection An output over-current is detected by checking the current that flows in the inverter DC section.
Malfunction
Decision
Conditions
„
A position signal error occurs while the compressor is running.
„
A speed error occurs while the compressor is running.
„
An output over-current input is fed from the output over-current detection circuit to the
microcomputer.
„
The system will be shut down if the error occurs 16 times.
„
Clearing condition: Continuous run for about 5 minutes (normal)
Supposed
Causes
„
Over-current due to defective power transistor
„
Over-current due to wrong internal wiring
„
Over-current due to abnormal supply voltage
„
Over-current due to defective PCB
„
Error detection due to defective PCB
„
Over-current due to closed stop valve
„
Over-current due to compressor failure
„
Over-current due to poor installation condition