Judgement Of Trouble By Every Symptom; Power Is Not Turned On (Does Not Operate Entirely) - Toshiba RAS-M10UKV-E3 Service Manual

10-5. Judgement of Trouble by Every Symptom

10-5-1. Indoor unit (Including remote controller)

(1) Power is not turned on (Does not operate entirely)

Is fuse (F01)
of indoor control
board blown?
(DC 12V or 5V)
NO
indicated on
rear of indoor
control board
Is DC
310 – 340V
NO
<Primary check>
suppalied to
or this problem
primary side of
is one step short
transfer switch?
of power P.C.
board block.
YES
Are DC 15V,
DC 12V and
Turn off breaker
DC 7V
NO
once and turn it
supplied to
on again after
secondary
removing motor.
side of
transfer
switch?
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
[START/STOP]
button on
remote control?
YES
(R04, C01,
YES
DB01, C03, R01
IC01 and T01)
are defective.
NO
Is voltage
YES
normal?
Refer to
Are DC 15V,
DC 12V or
supplied to
secondary
transfer
switch?
Does
transmission
mark on
NO
remote control
flash normally,
and is its signal
transmitted
properly?
YES
Parts
between 1
short-circuit?
Transfer switch,
DC 7V
NO
power supply or
side of
YES
– 85 –
NO
Remote control is
defective.
Refer to (5)
"Troubleshooting for
Remote Control."
Does
fan motor
connector YES
and 2
NO
Microcomputer
is defective.
IC (IC01) for
fan motor is
defective.
Operation
Check item
Conceivable principle
cause
Measure
Item by symptoms
Unit operates
normally.
Replace main
P.C. board.
Replace motor.