22
10-2. Instruction of troubleshooting
Indoor unit
operates. Outdoor
unit doesn’t
Outdoor unit
operates in
only Test
Run
operation.
Outdoor unit
doesn’t
operate even
in Test Run
operation.
Check room
temperature
thermistor.
Refer to
“Check of
outdoor unit”
on page 26.
Indoor unit
doesn’t receive
the signal from
remote
controller.
Refer to “Check
of remote controller
and receiver P.C.
board” on page 25.
Operation Indicator lamp
on the indoor unit is
flashing on and off.
Indoor unit doesn’t
receive the signal from
remote controller.
Also, Operation Indicator
lamp doesn’t flash, when
the EMERGENCY
OPERATION switch is
pressed.
Refer to “Check of
indoor electronic control
P.C. board” on page 26.
Cause:indoor/outdoor unit
connecting
Trouble of mis-wiring
Trouble of the serial signal
Cause:Indoor unit
2-time-Room
temperature/Indoo
r coil thermistor
trouble
3-time-Indoor fan motor
trouble
Refer to
“How to check
mis-wiring and
signal error
(when outdoor unit
doesn’t work)”
on page 27.
❈
1
6-time flash
2.5-second OFF
Cause:outdoor unit
6-time-check the defrost
thermistor
E
D
B
Check room temperature
thermistor. Refer to“Test
point diagram and
voltage” on page 28.
Refer to
“Check of indoor
fan motor” on
page 25.
Check indoor coil
thermistor. Refer
to“Test point
diagram and
voltage” on page
28.
❈
1<The case of the trouble of the serial signal>
When the power is turned off and then turned on again, the
indication shows “the trouble of mis-wiring.”
2-time flash
2.5-second OFF
3-time flash
2.5-second OFF
Start
1-time flash
C
A
(
