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Malfunction indicator of outdoor unit
check points:
Out of step occurs once
the unit is powered on
N
Is stop time of the
compressor longer than
3 minutes?
Are the wires for the
compressor connected correctly? Is the
connection made in clockwise
direction?
N
Connect the
wires correctly
Replace the control
panel AP1
Y
If the fault is eliminated?
Replace the
compressor
End
Fault with outdoor unit)
Y
Is heat dissipation of the unit
Is the input voltage normal?
Y
charge volume of refrigerant
N
If the fault is eliminated?
Out of step occurs in
operation
Is the outdoor fan working
N
OFAN is connected correctly
normally?
Y
Y
N
N
abnormal?
Y
Is the
Y
too much?
N
Replace the control
panel AP1
Y
N
Replace the
compressor
End
Check if the fan terminal
Replace the fan
capacitor C1
Replace the
Improve the heat dissipation
outdoor fan
of the unit(eg. clean heat
exchanger, improve
ventilation, etc.)
Start the unit after input
volatge is normal
Charge refrigerant according
to the service manual
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