Toshiba RAS-18SKP-ES - Troubleshooting for Indoor Unit

FILE NO. SVM-09036
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?
Operation
Measure
Item by symptoms
Check item
Conceivable principle
cause
– 56 −
"Troubleshooting for
Is DC 310-340V
Turn off power
supply once, and 5
second later, turn it
on again.
Is OPERATION
lamp blinking?
NO
YES
NO
NO
YES
YES
Is it possible to
turn on power
supply by
pressing
[ ]
button on remote
control?
Does
transmission
mark on
remote
control flash
normally, and
is its signal
transmitted
properly?
Remote control is
defective.
Refer to 9-9
Remote Control."
Part (C01, C02,
SG01, DB01, R09
R10, T01 and
IC10) are defective.
Is fuse (F01)
of indoor
control board
blown?
Is voltage (DC
12V or 5V)
indicated on
rear of indoor
control board
normal?
Microconlroler
defective.
Replace main P.C.
board.
across C03 ?
Turn off breaker
once and turn it
on again after
removing motor.
T01 or IC01 is
Replace motor.
YES
YES
NO
NO
NO
NO
YES
YES
YES
NO
NO
YES
Does the fan
motor
connector
between
and
1
3
short-
circuit?
Unit operates
normally.
defective.
Are DC 12V
across C27 ?
Are DC 12V
across C27 ?