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11-2. Instruction of troubleshooting
Start
Indoor unit
operates.
Outdoor unit
doesn't
operate.
Outdoor unit
Outdoor unit
operates in
doesn't
only Test Run
operate
operation.
even in
Test Run
operation.
Check room
temperature
thermistor.
Refer to "Test point
diagram and
voltage" on page 36.
1. Troubleshooting check table
•The following indication applies regardless of shape of the indocator.
Flashing
Operation Indicator
Before taking measures, make sure that the symptom reappears, for accurate troubleshooting.
Self check table
Abnormal
NO.
point
Indoor coil
2-time flash
thermistor
1
Room
tempera-
ture ther-
2.5-second OFF
mistor
When the remote
controller is
pressed
or when the
EMERGENCY
OPERATION
switch is
pressed,
the fan doesn't
rotate, with
OPERATION
INDICATOR
lamp on.
Refer to D
Refer to A
"Check of
"Check of
outdoor unit"
indoor fan
on page 35.
motor" on
page 34.
· Flashing of the OPERATION INDICATOR lamp (on the left-hand side)
indicates possible abnormalities.
· The OPERATION INDICATOR lamp (on the left-hand side) is lighting during
normal operation.
Indication
Indoor unit
doesn't receive
the signal from
remote controller.
Indoor unit
operates, when
the EMERGENCY
OPERATION
switch is pressed.
Refer to B
"Check of
remote controller
and receiver
P.C. board"
on page 34.
Symptom
Detect method
Detect Indoor coil/room tem-
Outdoor unit
perature thermistor short or
does not run.
open circuit.
32
OPERATION
INDICATOR
lamp on the indoor
unit is flashing
on and off.
Indoor unit
2-time flash
doesn't operate,
Cause: Indoor unit
when the
• Trouble of room
EMERGENCY
temperature/ indoor
OPERATION
coil thermistor
switch is pressed.
Refer to C
Check room tempre-
"Check of indoor
ture thermistor and
electronic control
indoor coil thermistor
P.C. board"
Refer to "Test point
on page 35.
diagram and voltage"
on page 36.
Check point
Check resistance of thermistor.
Re-connect connector.
Check indoor electronic control P.C.board.
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