Daikin AT12BV1LS Pocket Manual page 55

Troubleshooting
5.2.14 Input Over Current Detection
Remote
Controller
Display
Outdoor
Unit LED
Display
Method of
Malfunction
Detection
Malfunction
Decision
Conditions
Supposed
Causes
54
E8
A 1 2
5 1
An input over-current is detected by checking the input
current value being detected by CT with the compressor
running.
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
3 4 4
4 1
Si10-417
Service Diagnosis