Output Overcurrent Detection - Daikin FTXS30HVJU Service Manual

Troubleshooting

4.22 Output Overcurrent Detection

L5
Remote
Controller
Display
Method of
An output overcurrent is detected by checking the current that flows in the inverter DC section.
Malfunction
Detection
 A position signal error occurs while the compressor is running.
Malfunction
 A speed error occurs while the compressor is running.
Decision
 An output overcurrent input is fed from the output overcurrent detection circuit to the
Conditions
 The system will be shut down if the error occurs 16 times.
 Clearing condition: Continuous run for about 5 minutes (normal)
 Overcurrent due to defective power transistor
Supposed
 Overcurrent due to wrong internal wiring
Causes
 Overcurrent due to abnormal supply voltage
 Overcurrent due to defective PCB
 Error detection due to defective PCB
 Overcurrent due to closed stop valve
 Overcurrent due to compressor failure
 Overcurrent due to poor installation condition
 Overcurrent due to outdoor unit fan lock
100
microcomputer.
SiUS04-924
Service Diagnosis