Table of Contents
Advertisement
9-3. 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 9-7.
pressor".
"Test point
diagram and
voltage".
Upper lamp
Upper lamp
Flash ON
2-time blink
and OFF at
Cause:
0.5-second
Indoor unit
intervals
• Trouble
Cause:
of room
Indoor/Outdoor
temperature
unit
/ indoor coil
• Miswiring or
thermistor.
trouble of se-
rial signal.
Refer to
Check room
9-6. "How
temperature
to check mis-
thermistor
wiring and
and indoor
serial signal
coil thermis-
error".
tor. Refer
to 9-7."Test
point diagram
and voltage".
OBH820A
Indoor unit operates.
Indoor unit does not
Outdoor unit does not
receive the signal from
operate normally.
remote controller.
Unit does not
Indoor unit
operate
operates, when
normally in
the emergency
COOL or
operation switch
HEAT mode
is pressed.
operation.
Refer to
Refer to 9-6.
"Check of R.V.
"Check of remote
coil".
controller and
indoor elec-
tronic control P.C.
board".
Upper lamp
Upper 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
Replace the
9-6. "Check
indoor elec-
of indoor fan
tronic control
motor".
P.C. board.
OPERATION INDICATOR
lamp on the indoor unit is
blinking ON and OFF.
Indoor unit does
not operate, when
the 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 9-6.
"Check
of indoor P.C. board
and indoor fan motor".
Upper lamp
Upper 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".
18
* "Test Run operation" means the
operation within 30 minutes after
the emergency operation switch
is pressed.
If blinking of OPERATION
INDICATOR lamp cannot be
checked, it can be checked with
failure mode recall function.
Refer to outdoor unit service
manual.
Upper lamp
Upper 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."
Advertisement
Table of Contents
