Toshiba RAS-M10U2MUVG-E Service Manual page 53

10-5. Judgment of Trouble by Every Symptom
10-5-1. 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?
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 (R01, R03,
Is fuse (F01) of R04, DB01, C01,
YES
C08, IC01, and
indoor control
board blown?
NO
Is the
voltage
Parts of power
NO
across C08
supply circuit are
measured
DC 310V~340V?
YES
Are DC 5V,
DC 12V NO
supplied to
main P.C.
board?
YES
• Be sure to disconnect the motor connector CN210 after shut off the power supply, or it will be a cause of
damage of the motor.
Does Does
transmission transmission
mark on mark on
NO
remote control remote control
flash normally, flash normally,
]
and is its signal and is its signal
transmitted transmitted
properly? properly?
YES
T01) are
defective.
defective
NO
Remote control is
defective.
Refer to (4)
"Troubleshooting for
Remote Control."
Does fan
motor
YES
connector
between
and short-
circuit?
NO
Microcomputer
is defective.
Parts are
defective
– 53 –
Operation
Check item
Conceivable
principle cause
Measure
Item by symptoms
Unit operates
normally.
Replace main P.C.
board.
Replace motor