Output Overcurrent Detection - Daikin FTX20K(2)V1B Service Manual

Troubleshooting

4.22 Output Overcurrent Detection

L5
Error Code
An output overcurrent is detected by checking the current that flows in the inverter DC section.
Method of Error
Detection
 A position signal error occurs while the compressor is running.
Error Decision
 A rotation speed error occurs while the compressor is running.
Conditions
 An output overcurrent signal is fed from the output overcurrent detection circuit to the
 If the error repeats, the system is shut down.
 Reset condition: Continuous run for about 11 minutes without any other error
 Poor installation condition
Supposed
 Closed stop valve
Causes
 Defective power module
 Wrong internal wiring
 Abnormal power supply voltage
 Defective outdoor unit PCB
 Power supply voltage is not as specified.
 Defective compressor
77
microcomputer.
SiBE041525F
Service Diagnosis