Out Of Step Diagnosis For The Compressor - Gree GWH12ACC-K6DNA1D 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:
●Is the system pressure too high?
●Is the input voltage too low?
Fault diagnosis process:
Out of step occurs once the
No
compressor longer than
Are the wires for the compressor connected
correctly? Is connection sequence right?
Is the connection made in clockwise
No
Connect the
wires correctly
Yes
If the fault is eliminated?
Installation and Maintenance
unit is powered on.
Is stop time of the
3 minutes?
Yes
direction?
Yes
Replace the control
panel AP1
No
Replace the
compressor
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
Replace the fan
capacitor C1
Replace the
outdoor fan
73