Troubleshooting Si12-411A
186 Service Diagnosis
5.14 Input Over Current Detection
Remote
Controller
Display
E8
Outdoor Unit LED
Display
A
5
1
1
2
4
3
1
4
4
Method of
Malfunction
Detection
An input over-current is detected by checking the input current value being detected by CT with
the compressor running.
Malfunction
Decision
Conditions
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)
Supposed
Causes
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
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