Troubleshooting SiE12-411
184 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