Gree GWH09ACC-K6DN A1 A/I Service Manual page 79

(5) Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit)
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Out of step occurs once the
unit is powered on.
No
Is stop time of the
compressor longer than
3 minutes?
Are the wires for the compressor connected
correctly? Is connection sequence right?
Is the connection made in clockwise
direction?
No
Connect the
wires correctly
Replace the control
panel AP1
Yes
If the fault is eliminated?
Replace the
compressor
76
Yes
Yes
No
End
Out of step occurs in
operation
No
Is the outdoor fan working
normally?
Yes
Yes
Is the outdoor unit blocked
by foreign objects?
No
Replace the
control panel AP1
If the fault is eliminated?
No
Replace the
compressor
End
Check if the fan terminal
OFAN is connected correctly
Remove foreign objects
Yes
Installation and Maintenance
Service Manual
Replace the fan
capacitor C1
Replace the
outdoor fan