Service manual

13
8-3. INSTRUCTION OF TROUBLESHOOTING
Indoor unit oper-
ates.
Outdoor unit
doesn't operate.
If blinking of OPERATION INDI-
CATOR lamp cannot be checked,
it can be checked with failure
mode recall function.
Indoor unit
doesn't receive
the signal from
remote controller.
OPERATION INDICATOR
lamp on the indoor unit is
fl ashing on and off.
Outdoor unit
operates only
in Test Run
operation.
Outdoor
unit doesn't
operate even
in Test Run
operation.
Indoor unit
operates, when
EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate,
when EMER-
GENCY OPERA-
TION switch is
pressed.
Check room
temperature
thermistor.
Refer to 8-7.
"Test point
diagram and
voltage".
• Check the
wiring diagram
of the outdoor
unit.
• Check
outdoor fuse.
Refer to 8-6.
"Check of remote
controller and
receiver P.C.
board".
1. Check indoor/outdoor
connecting wire.
2. Refer to 8-6. "Check
of indoor electronic
control P.C. board and
indoor fan motor".
Left lamp
2-time fl ash
Cause:
Indoor unit
• Trouble of room
temperature /
indoor coil ther-
mistor
Left lamp
3-time fl ash
Cause:
Indoor unit
• Trouble of in-
door fan motor
Left lamp
4-time fl ash
Cause:
Indoor unit
• Trouble of
indoor unit con-
trol system
Start
Check room
temperature
thermistor and
indoor coil ther-
mistor. Refer to
8-7. "Test point
diagram and
voltage".
Refer to 8-6.
"Check of indoor
fan motor".
Replace the
indoor electronic
control P.C.
board.
"Test Run operation" means
the operation within 30 minutes
after EMERGENCY OPERA-
TION switch is pressed.