Toshiba RAS-10S3AV-E Service Manual page 73

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?
Is fuse (F01)
of indoor control
board blown?
(DC 12V or 5V)
NO
indicated on
rear of indoor
control board
Is the
voltage
NO <Primary check>
across C08
or this problem
mesured
is one step short
DC 310V~340V?
of power P.C.
board block.
YES
Are DC 5V,
Turn off breaker
DC 12V
NO
once and turn it
supplied
on again after
to main
removing motor.
P.C. board?
YES
• Be sure to disconnect the motor connector CN10 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.
NO
Is OPERATION
lamp blinking?
YES
Is it possible to
turn on power
supply by pressing
[ ]
button
on remote
control?
YES
(DB01,C08,T01
YES
and IC02)
are defective.
NO
Is voltage
YES
normal?
Refer to
Are DC 5V,
or DC 12V
supplied
P.C. board?
Does
transmission
mark on
NO
remote control
flash normally,
and is its signal
transmitted
properly?
YES
Parts
short-circuit?
NO
to main
YES
– 72 –
FILE NO. SVM-15001
NO
Remote control is
defective.
Refer to (4)
"Troubleshooting for
Remote Control. "
Does
fan motor
connector YES
between 1
and
3
NO
Microcomputer
is defective.
Regulator IC
(IC02) or T01
are defective
Operation
Check item
Conceivable principle
cause
Measure
Item by symptoms
Unit operates
normally.
Replace main
P.C. board.
Replace motor
.