Sharp AY-X36RU Service Manual page 20

AY-X36RU
AE-X36RU
High temperature and overload protection diagnosis (AP1: the control board of the outdoor unit)
7.
Mainly detect:
● Is outdoor ambient temperature in normal range?
● Are the outdoor and indoor fans operating normally?
● Is the heat dissipation environment inside and outside the unit is good?
Overheat and high
temperature protection
Is outdoor ambient temperature higher than 53?
N
20 minutes after the complete
unit is powered off.
Is heat dissipation of the indoor unit
and outdoor unit abnormal?
N
Does the outdoor fan work normally?
Y
Replace the
control panel AP1
End
Normal protection, please operate
it after the outdoor ambient temp-
Y
erature is normalized.
Improve the heat
Y
dissipation environ-
ment of the unit
1. Check if the fan terminal OFAN
is connected correctly
2. Measure the electric resistance
N
between any two fan terminal by
ohmmeter, check if the value of
electric resistance is less than
1KOhm.
Y
N
Replace the
outdoor fan
20