SiBE12-908 Troubleshooting
Service Diagnosis 152
2.30 Output Overcurrent
Remote
Controller Display
L5
Method of
Malfunction
Detection
An output overcurrent 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.
The unit shuts down when the signal of output overcurrent is sent repeatedly from the output
overcurrent detection circuit to the microcomputer.
Clear condition: The unit continuously runs for about 11 minutes. (without fault)
Supposed
Causes
Overcurrent due to defective power transistor
Overcurrent due to wrong internal wiring
Overcurrent due to abnormal supply voltage
Overcurrent due to defective PCB
Detection error due to defective PCB
Overcurrent due to closed stop valve
Overcurrent due to defective compressor
Overcurrent due to poor installation condition
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