Sharp AY-X36RU Service Manual page 25

Communication malfunction: (AP1: the control board of the outdoor unit)
12.
Mainly detect:
● Is there any damage for the indoor unit mainboard communication circuit? Is communication circuit damaged?
● Detect the indoor and outdoor units connection wire and indoor and outdoor units inside wiring is connect well or not, if isthere
any damage?
The AP1 voltage
detection circuit
is at fault
Is the problem fixed?
Y
Y
Check wiring inside of
the indoor and outdoor
units
Y Are wires broken?
N
Check the communication
N
circuit of the outdoor unit
The communication
circuit is abnormal
N
Replace the main board
of the indoor unit
Start
Did the equipment operate
normally before the failure
occurs?
Y
Replace the main board
Y
AP1 of the outdoor unit
Is the problem fixed?
N
Y
End
25
N
Check the wiring of the indoor and
outdoor units with reference to the
wiring diagram
Is the connection right?
N
N
Correctly connect the
corresponding wires for
the indoor and outdoor
units with reference to
the wiring diagram
Is the problem fixed?
Y
AY-X36RU
AE-X36RU