Troubleshooting SiE12-411
198 Service Diagnosis
5.22 Output Over Current Detection
Remote
Controller
Display
L5
Outdoor Unit LED
Display
A 5 1 1 2 1 3 4 4 1
Method of
Malfunction
Detection
An output over-current is detected by checking the current that flows in the inverter DC section.
Malfunction
Decision
Conditions
" A position signal error occurs while the compressor is running.
" A speed error occurs while the compressor is running.
" An output over-current input is fed from the output over-current detection circuit to the
microcomputer.
" 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 defective power transistor
" Over-current due to wrong internal wiring
" Over-current due to abnormal supply voltage
" Over-current due to defective PCB
" Error detection due to defective PCB
" Over-current due to closed stop valve
" Over-current due to compressor failure
" Over-current due to poor installation condition
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