Output Overcurrent Detection - Daikin Super Multi NX FFQ25B8V1B Service Manual

SiBE121021_C

7.15 Output Overcurrent Detection

L5
Remote
Controller
Display
Outdoor Unit LED A
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
Service Diagnosis
j h h i h
1 2 3 4
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
Defective power transistor
Wrong internal wiring
Abnormal supply voltage
Defective outdoor unit PCB
Closed stop valve
Defective compressor
Poor installation condition
h
5
Troubleshooting for Outdoor Unit
355