22
AY-X36RU
AE-X36RU
9.
Out of step diagnosis for the compressor (AP1: the control board of the outdoor unit)
Mainly detect:
● Whether the system pressure is too high?
● Whether the input voltage is too low?
Out of step occurs once the
unit is powered on.
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?
Connect the
wires correctly
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 any objects?
Replace the
control panel AP1
Replace the
compressor
End
Remove objects.
Replace the
outdoor fan
N
Y
Y
Y
Y
Y
Y
Y
N
N
N
N
N
N
Measure the
electric resistance between any two
fan terminal by ohmmeter, check if the value of
electric resistance is less than
1KOhm.
Is the problem fixed?
Is the problem fixed?