Output Overcurrent Detection - Daikin C-Series 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
Malfunction
Decision
Conditions
Supposed
Causes
88
A position signal error occurs while the compressor is running.
A speed error occurs while the compressor is running.
An output overcurrent signal is fed from the output overcurrent detection circuit to the
microcomputer.
If the error repeats 16 times, the system is shut down.
Reset condition: Continuous run for about 5 minutes without any other error
Poor installation condition
Closed stop valve
Defective power module
Wrong internal wiring
Abnormal supply voltage
Defective outdoor unit PCB
Defective compressor
SiBE07-618_C
Service Diagnosis