Daikin AT12BV1LS Pocket Manual page 119

Troubleshooting
5.2.46 Output Over Current Detection
Remote
Controller
Display
Outdoor
Unit LED
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
118
L5
5 1
A 1 2
An output over-current is detected by checking the
current that flows in the inverter DC section.
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 4 1
3 4
Si10-417
Service Diagnosis