AE-X4M30PU
23
2) When one room is not cooled (other rooms are cooled)
Yes
Yes
No
Yes
No
No
No
Yes
No
No
Yes
Yes
Short circuit of the thermistor error
Open circuit of the thermistor error
Open circuit of serial signal line
Short circuit of serial signal line
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
61ºF(16ºC))
Is the timer lamp of the
indoor unit in the room
not cooled flashing ?
Check that the power
between the terminal
board "L1" and "L2" 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 expansion valve
(UNIT A)
or the expansion valve
(UNIT B)
or the expansion valve
(UNIT C)
or the expansion valve
(UNIT D)
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.
Is the resistance value of the ther-
mistor for
UNIT A (TH6), UNIT B
(TH7), UNIT C (TH8) or UNIT D
(TH9)
Summary of Contents for AE-X4M30PU
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