Output Over Current Detection - Daikin Super Multi NX C-Series Service Manual

Troubleshooting

5.22 Output Over Current Detection

L5
Remote
Controller
Display
Outdoor Unit LED
A
Display
Method of An output over-current is detected by checking the current that flows in the inverter DC section.
Malfunction
Detection
" A position signal error occurs while the compressor is running.
Malfunction
" A speed error occurs while the compressor is running.
Decision
" An output over-current input is fed from the output over-current detection circuit to the
Conditions
" 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 defective power transistor
Supposed
" Over-current due to wrong internal wiring
Causes
" 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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microcomputer.
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SiE12-411
Service Diagnosis