Output Overcurrent Detection - Daikin FTX09NMVJU Service Manual

Troubleshooting

4.22 Output Overcurrent Detection

L5
Error Code
Method of Error An output overcurrent is detected by checking the current that flows in the inverter DC section.
Detection
Error Decision
Conditions
Supposed
Causes
99
A position signal error occurs while the compressor is running.
A rotation 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, the system is shut down.
Reset condition: Continuous run for about 11 minutes without any other error
Poor installation condition
Closed stop valve
Defective power module
Wrong internal wiring
Abnormal power supply voltage
Defective outdoor unit PCB
Power supply voltage is not as specified.
Defective compressor
SiUS091601E
Service Diagnosis