Troubleshooting For Indoor Unit - Toshiba RAS-24SKP-ES2 Service Manual

9-6. Troubleshooting for Indoor unit

9-6-1. Power can not be turned on. (The unit does not operate at all.)
<Primar check>
(1) Is the supply voltage normal?
(2) Is the connection to the AC output OK?
(3) Is the fuse (F01) blown?
Is fuse (F01)
control board
Is voltage (DC
12V or 5V)
NO
indicated on
rear of indoor
control board
NO
Is DC 310-340V
across C03 ?
YES
Turn off breaker
NO
once and turn it
Are DC 12V
on again after
across C27 ?
removing motor.
YES
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
Part (C01, C02,
SG01, DB01, R09
YES
of indoor
R10, T01 and
IC10) are defective.
blown?
NO
YES
normal?
Are DC 12V
across C27 ?
Does
transmission
mark on
NO remote
NO
control flash
normally, and
is its signal
transmitted
properly?
YES
Does the fan
motor
connector
between
and 3 short-
circuit?
Microconlroler
defective.
NO T01 or IC01 is
defective.
YES
– 54 −
FILE NO. SVM-10049
Operation
Check item
Conceivable principle
cause
Measure
Item by symptoms
Remote control is
defective.
Refer to 9-9
"Troubleshooting for
Remote Control."
Unit operates
normally.
YES
1
NO
Replace main P.C.
board.
Replace motor.