Out Of Step Diagnosis For The Compressor - Gree GWC09QB-K3DNB2B Service Manual

Service Manual
5. Out of step diagnosis for the compressor (AP1 hereinafter refers to the control board of the outdoor unit)
Mainly detect:
Out of step occurs once the
compressor longer than
Are the wires for the compressor connected
correctly? Is connection sequence right?
Is the connection made in clockwise
Connect the
wires correctly
If the fault is eliminated?
Installation and Maintenance
unit is powered on.
Is stop time of the
3 minutes?
direction?
Replace the control
panel AP1
Replace the
compressor
End
Out of step occurs in
operation
Is the outdoor fan working
normally?
Is the outdoor unit blocked
by foreign objects?
Replace the
control panel AP1
If the fault is eliminated?
Replace the
compressor
End
Check if the fan terminal
OFAN is connected correctly
Remove foreign objects
Replace the fan
capacitor C1
Replace the
outdoor fan
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