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10-3. INSTRUCTION OF TROUBLESHOOTING
Start
Indoor unit operates.
Outdoor unit does
not operate.
Outdoor unit
Outdoor unit
operates only
does not
in Test Run
operate even
operation.
in Test Run
operation.
Check room
Refer to "How
temperature
to check
thermistor.
inverter/com-
Refer to 10-
pressor".
7. "Test point
diagram and
voltage".
Left lamp
Left lamp
Blink on and
2-time blink
off at 0.5-sec-
Cause:
ond intervals
Indoor unit
Cause:
• Trouble
Indoor/Outdoor
of room
unit
temperature
• Miswiring or
/ indoor coil
trouble of se-
thermistor
rial signal
Refer to 10-
Check room
6. "How to
temperature
check mis-
thermistor
wiring and
and indoor
serial signal
coil thermis-
error".
tor. Refer to
10-7."Test
point diagram
and voltage".
OBH838A
Indoor unit operates.
Outdoor unit does
not operate normally.
Indoor unit
Unit does not
operates, when
operate nor-
EMERGENCY
mal operation
OPERATION
in COOL or
switch is pressed.
HEAT mode.
Refer to
Refer to 10-6.
"Check of R.V.
"Check of remote
coil".
controller and
indoor elec-
tronic control P.C.
board".
Left lamp
Left lamp
3-time blink
4-time blink
Cause:
Cause:
Indoor unit
Indoor unit
• Trouble of
• Trouble
indoor fan
of indoor
motor
unit control
system
Refer to 10-
Replace the
6. "Check
indoor elec-
of indoor fan
tronic control
motor".
P.C. board.
Indoor unit does
OPERATION INDICATOR
not receive the
lamp on the indoor unit is
signal from re-
blinking ON and OFF.
mote controller.
Indoor unit does
not operate, when
EMERGENCY
OPERATION
switch is pressed.
1. Check indoor/out-
door connecting wire.
(Check if the power is
supplied to the indoor
unit.)
2. Refer to 10-6.
"Check
of indoor P.C. board
and indoor fan motor".
Left lamp
Left lamp
5-time blink
6-time blink
Cause:
Cause:
Outdoor unit
Outdoor unit
• Trouble of
• Outdoor
power sys-
thermistor in
tem abnor-
outdoor unit
mality
Refer to
Refer to
"How to
"Check of
check
outdoor ther-
inverter/com-
mistors".
pressor".
21
"Test Run operation" means the
operation within 30 minutes af-
ter EMERGENCY OPERATION
switch is pressed.
If blinking of OPERATION INDI-
CATOR lamp cannot be checked,
it can be checked with failure
mode recall function.
Refer to outdoor unit service manual.
Left lamp
Left lamp
7-time blink
14-time blink
Cause:
or more
Outdoor unit
Cause:
• Trouble of
Outdoor unit
outdoor con-
• Other ab-
trol system
normality
Replace the
Check "Flow
inverter P.C.
chart of the
board or
detailed
the outdoor
outdoor unit
electronic
failure mode
control P.C.
recall func-
board.
tion."
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