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?
• Be sure to disconnect the motor connector CN3
4
after shut off the power supply, or it will be a cause of
damage of the motor.
NO
Turn off power supply once, and
5 second later, turn it on again.
Is OPERATION indicator flashing?
Is it possible to turn on
A/C by pushing
[ ] button
on remote controller?
Is voltage
(DC5V, 12V and 15V)
indicated on rear of
indoor control
board nor mal?
Does transmission mark
on remote controller flash
normally,and is its signal
transmitted properly?
Item by symptoms
Operation
Check Item
Considerable principle cause
Measures
Remote controller is defective.
Refer to (5) “Troubleshooting
for remote controller”.
Unit operates normally.
Replace main
P.C. board
Is fuse (F01)
of indoor control
board blown?
Microcomputer
is defective.
NO
NO
NO
NO
YES
YES
YES
YES
YES
Point remote to digital
camera. Can see infrared
ray at sending LED
on camera monitor
when push [ ] button?
Replace remote control
Reconnect housing
YES
Does connection
between PC Board
and reciver PCB
are connect properly?
NO
NO
YES
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