Judgement Of Trouble By Every Symptom - Toshiba RAS-M10NKV-E Service Manual

8-5. Judgement of Trouble by Every Symptom

8-5-1. Indoor unit (Including remote controller)
(1) Power is not turned on (Does not operate entirely)
For 10/13k
Is fuse (F01)
of indoor control
board blown?
Is voltage
(DC 12V or 5V)
NO
indicated on
rear of indoor
control board
normal?
Is the
Refer to
voltage
NO
<Primary check>
14~31.4V DC
or this problem
at C50?
is one step short
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
Parts
(R04, C01,
YES
DB01, C50, IC08
IC11 and T01)
are defective.
NO
YES
Are DC 5V,
or DC 12V
supplied
to main
P.C. board?
Does
transmission
mark on
NO NO
remote control
flash normally,
and is its signal
transmitted
properly?
YES
Does
fan motor
connector
between 1
and
short-circuit?
Microcomputer
is defective.
Regulator IC
NO
(IC08, IC11)
are defective
YES
– 38 –
FILE NO. SVM-05019
Remote control is
defective.
Refer to (5)
"Troubleshooting for
Remote Control. "
YES
3
NO
Replace main
P.C. board.
Replace motor
Operation
Check item
Conceivable principle
cause
Measure
Item by symptoms
Unit operates
normally.
.