Input Over Current Detection - Daikin B-Series Service Manual

Si04-306E

4.10 Input Over Current Detection

E8
Remote
Controller
Display
Method of An input over-current is detected by checking the input current value being detected by CT with
Malfunction the compressor running.
Detection
Malfunction
Decision
Conditions
Supposed
Causes
Service Diagnosis
The following CT input with the compressor running continues for 2.5 seconds.
CT input : Above 20 A
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 compressor failure
Over-current due to defective power transistor
Over-current due to defective inverter main circuit electrolytic capacitor
Over-current due to defective outdoor unit PCB
Error detection due to outdoor unit PCB
Over-current due to short-circuit
Troubleshooting
121