100
Alarm
Code
51
Abnormality of Current Sensor for Inverter
●
The alarm code is ashed on the 7-segment display of the outdoor unit.
●
The alarm code is displayed on the wired controller of the indoor unit.
★
If abnormal current detection occurs, the compressor stops. The operation automatically restarts after
three minutes. If this occurs again twice in the next 30 minutes, this alarm code is displayed.
Condition of Activation:
(1) Picking up circuit for inverter current is not central value before the compressor starts operation;
(2) Inverter secondary current is excessively low when the compressor starts operation.
Abnormal
Replace comp.
Restart operation.
No
Inverter PCB is faulty.
Replace it.
Compressor stops
immediately at low frequency.
“P7” indication appears
without compressor
operation.
How does
compressor operate
when restarted?
Is coil resistance
of comp. normal?
Yes
Replace inverter PCB .
Check inverter PCB .
Normal
Replace wiring for
inverter PCB .
TROUBLESHOOTING
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