28
10-2. 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.
Outdoor unit
operates in
only Test Run
operation.
Outdoor unit
doesn't
operate
even in
Test Run
operation.
Indoor unit
operates, when
the
EMERGENCY
OPERATION
switch is pressed.
Indoor unit
doesn't operate,
when the
EMERGENCY
OPERATION
switch is pressed.
Check room
temperature
thermistor.
Refer to
"Test point
diagram and
voltage" on
page 37.
Refer to
D
"Check of
outdoor unit"
on page 33.
Refer to
B
"Check of
remote controller
and receiver
P.C. board"
on page 31.
Flash on and
off at 0.5-
second
intervals
Cause:
Indoor/
Outdoor unit
• Mis-wiring
3-time flash
Cause:
Indoor unit
• Trouble of
indoor fan
motor
6-time flash
Cause:
Outdoor unit
• Trouble of
thermistor
in outdoor
unit
7-time flash
Cause:
Outdoor unit
• Trouble of
outdoor
control
system
Refer to
F
"How to check
mis-wiring
(When
outdoor unit
doesn't oper
ate)"
on page 35.
Refer to
A
"Check of
indoor fan
motor"
on page 31.
Refer to
H
"Check of
outdoor
thermistor"
on page 36.
Replace the
deicer
P.C. board.
10-time flash
Cause:
Outdoor unit
• Trouble of
low discharge
temperature
protection
Refer to
G
"Check of
LEV"
on page 36.
4-time flash
Cause:
Indoor unit
• Trouble of
indoor unit
control
system
Replace the
indoor
electronic
control
P.C. board.
1. Check indoor /
outdoor
connecting wire.
2. Refer to
C
"Check of indoor
electronic control
P.C. board"
on page 32.
Outdoor unit
doesn't
stop even
if indoor unit
stops.
Refer to
E
"Check of
outdoor unit"
on page 34.
w
1.
Indoor unit
operates.
Outdoor unit
doesn't operate
normally.
2-time flash
Cause:
Indoor unit
• Trouble of
room temp-
erature/
indoor coil
thermistor
Check room
temperature
thermistor
and indoor
coil thermis-
tor.
Refer to
"Test point
diagram and
voltage"
on page 37.
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