Compressor break down
Is the power source voltage
of the outdoor unit normal?
Does the voltage reduction
occur when the fixed-speed
compressor has been activated?
Is the wiring connection
on the inverter
P .C. board correct?
Is there an abnormal overload?
Check inverter P .C. board.
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code
[1F]
No
Yes
Yes
No
No
Yes
Yes
No
Operation cause
1. Outdoor unit power source error
2. Inverter compressor circuit system error
3. Inverter P .C. board error
64
Confirm the power source supply.
Modify wiring connector.
Remove cause of overload.