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11-5. Judgment of Trouble by Every Symptom
11-5-1. Indoor Unit (Including Remote Controller)
(1) Power is not turned on (Does not operate entirely)
<Primary check>
1. Is the supply voltage normal?
2. Is the normal voltage provided to the outdoor unit?
3. Is the crossover cable connected properly?
4. Is the fuse (F01) blown?
NO
Is OPERATION indicator flashing?
Is fuse (F01)
of indoor control
board blown?
NO
Is voltage
(DC5V, 12V and 15V)
indicated on rear of
indoor control
board nor mal?
NO
• Be sure to disconnect the motor connector CN36 after shut off the power supply, or it will be a cause of
damage of the motor.
Turn off power supply once, and
5 second later, turn it on again.
YES
Is it possible to turn on
A/C by pushing
[
] button
on remote controller?
YES
Unit operates normally.
YES
Does connection
YES
between PC Board
and reciver PCB
are connect properly?
Reconnect housing
Does transmission mark
NO
on remote controller flash
normally,and is its signal
transmitted properly?
YES
Point remote to digital
camera. Can see infrared
ray at sending LED
on camera monitor
when push [
] button?
YES
YES
Microcomputer
NO
- 79 -
Operation
Check Item
Considerable principle cause
Measures
Item by symptoms
NO
Remote controller is defective.
Refer to (5) "Troubleshooting
for remote controller".
NO
Replace remote control
is defective.
Replace main
P.C. board
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