Output Over Current Detection - Daikin D-Series Service Manual

Si12-619A
5.25

Output Over Current Detection

L5
Remote
Controller
Display
Outdoor Unit LED A
Display
Method of An output over-current is detected by checking the current that flows in the inverter DC section.
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Service Diagnosis
1 2 3 4
5 1 1 4
A position signal error occurs while the compressor is running.
A speed error occurs while the compressor is running.
An output over-current input is fed from the output over-current detection circuit to the
microcomputer.
The system will be shut down if the error occurs 16 times.
Clearing condition: Continuous run for about 5 minutes (normal)
Over-current due to defective power transistor
Over-current due to wrong internal wiring
Over-current due to abnormal supply voltage
Over-current due to defective PCB
Error detection due to defective PCB
Over-current due to closed stop valve
Over-current due to compressor failure
Over-current due to poor installation condition
1
Troubleshooting
251