Service manual

Troubleshooting SiENBE12-522A
222 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
Malfunction is detected by checking the input current value.
Malfunction
Decision
Conditions
" The following condition continues for 2.5 seconds.
Input current ≥ 11A (typical value)
" The compressor halts if the error occurs, and restarts automatically after 3 minutes stand-by.
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