105
TROUBLESHOOTING
L4 Troubleshooting
Situation 1: L4 error is displayed immediately after the unit is switched on
L4
↓
Replace main PCB
Situation 2: L4 error is displayed after the compressor has been in operation for a period
of time and the compressor speed is over 60 rps
L4
↓
Compressor is over-current (1)
YES →
Replace the compressor
NO
↓
Replace main PCB
Notes:
1 Restart the unit, use clamp ammeter to measure the compressor current, if the current is normal it indicates
that the compressor is faulty, if the current is abnormal it indicates that the inverter PCB is faulty.
L5/L8/L9 Troubleshooting
L5 - L8 - L9
↓
The wire is not connected properly
YES →
Check the wire is connected properly
NO
↓
Inverter module PCB has a malfunction
YES
→
Replace the inverter module PCB
NO
↓
Replace the compressor
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