Read Sharp AE-XM24CR (serv.man11) Service Manual online
49
AY-XM7/9/12CR
AY-XPM7/9/12CR
AE-XM18/24CR
AY-XPM7/9/12CR
AE-XM18/24CR
2
Yes
Yes
No
Yes
No
No
No
Yes
No
No
Yes
Yes
Short circuit of the thermistor error
Open circuit of the thermistor error
Is the resistance value of the
thermistor for UNIT A (TH5),
UNIT B (TH6) or UNIT C (TH7)
Open circuit of serial signal line
Short circuit of serial signal line
When one room is not cooled (other rooms are cooled)
Is the timer lamp of the
indoor unit in the room
not cooled flashing ?
Press the OPERATION
button to start operating
the air-conditioner.
(Set the cooling mode
to 18˚C.)
Is the timer lamp of the
indoor unit in the room
not cooled flashing ?
Check that the power
between the terminal
board "N" and "1" of the
indoor unit is AC 230V.
Repair the wiring
between the units.
Replace the indoor
control PWB.
Replace the thermistor.
Check the failure
symptom with the failure
diagnosis mode.
Replace the outdoor control
PWB
or the exppansion valve (UNIT A)
or the exppansion valve (UNIT B)
or the exppansion valve (UNIT C)
Is the resistance value of the
winding in the fan motor
∞
?
(Between 1 and 3 of CN1)
Abnormal fan motor of
indoor unit
The thermal fuse is blown.
The motor is locked.
Replace the indoor fan motor.
Is the wiring between the
units connected by mistake
or broken ?
Repair the wiring between
the units.
Replace the indoor control PWB.
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