Output Overcurrent Detection - Daikin H 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
 A position signal error occurs while the compressor is running.
Malfunction
 A speed error occurs while the compressor is running.
Decision
 An output overcurrent signal is fed from the output overcurrent detection circuit to the
Conditions
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 5 minutes without any other error
 Poor installation condition
Supposed
 Closed stop valve
Causes
 Defective power module
 Wrong internal wiring
 Abnormal supply voltage
 Defective outdoor unit PCB
 Defective compressor
Service Diagnosis
microcomputer.
SiUS04-924_A
103