Gree GWH07QA-K6DNC4A Service Manual page 114

4. Start-up failure (following AP1 for outdoor unit control board)
Mainly detect:
●Whether the compressor wiring is connected correct?
●Is compressor broken?
●Is time for compressor stopping enough?
Fault diagnosis process:
No
112
Power on the unit
Is stop time of the compressor
longer than 3 minutes?
Yes
Does startup fail?
Yes
Are the wires for the compressor connected
correctly? Is connection sequence right?
Yes
Replace the control panel AP1
If the fault is eliminated?
No
Replace the
compressor
End
No Restart it up after
3 minutes
Connect the wires as
No
per the connection
diagram
Yes
Service Manual
Installation and Maintenance