Service manual

70
14
Troubleshooting
Diagnostic Procedure for Check Code
Check code Operation cause
1. Outdoor unit power source error
[1F]
2. Inverter compressor circuit system error
Compressor break down
3. Inverter P.C. board error
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.
Confirm the power source supply.
Modify wiring connector.
Remove cause of overload.
No
Yes
Yes
No
No
Yes
Yes
No