13
8-3. Instruction of troubleshooting
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Indoor unit
doesn't receive
the signal from
remote controller.
OPERATION INDICATOR
lamp on the indoor unit is
flashing on and off.
w
Outdoor unit
operates
when the
EMERGENCY
OPERATION
switch is
pressed.
Outdoor unit
doesn't
operate
when the
EMERGENCY
OPERATION
switch is
pressed.
Indoor unit
operates when
EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate
when
EMERGENCY
OPERATION
switch is pressed.
Check the
room
temperature
thermistor.
Refer to 8-7.
"Test point
diagram and
voltage".
Refer to 8-6.
B
"Check of
remote controller
and receiver
P.C. board".
Power lamp
2-time flash
Cause:
Indoor unit
• Trouble of the room
temperature/
indoor coil
thermistor
Power lamp
3-time flash
Cause:
Indoor unit
• Trouble of the
indoor fan
motor
Check the room
temperature
thermistor and the
indoor coil thermistor.
Refer to 8-7.
"Test point diagram
and voltage".
Refer to 8-6.
A
"Check of
indoor fan
motor".
1. Check indoor /
outdoor
connecting wire.
2. Refer to 8-6.
C
"Check of indoor
electronic control
P.C. board and
indoor fan motor."
•Check the
wiring diagram
of the outdoor
unit.
•Check
outdoor fuse.
Power lamp
4-time flash
Cause:
Indoor unit
• Trouble of the
indoor control
system
Replace the
indoor
electronic
control P.C.
board.
w
If flashing of
operation indicator lamp cannot
be checked, it can be checked
with failure mode recall function.
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