Judgment Of Trouble By Every Symptom - Toshiba RAS-13UAV-E2 Service Manual

10-5. Judgment of Trouble by Every Symptom

10-5-1. Indoor unit (Including remote contro)
(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
NO
Is fuse (F01)
of indoor control
board blown?
NO
Is voltage
(DC12 V or 5 V)
NO
indicated on rear of
indoor control
board normal?
Is DC310-340 V
NO
supplied to
primary side of
short of power P.C. board block.
transfer switch?
YES
Are DC15 V, 12 V
NO Turn off breaker once
and 7 V supplied to
and turn it on again
secondary side of
after removing motor.
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.
5 second later, turn it on again.
Is OPERATION lamp flashing?
YES
Is it possible to turn on
power supply by pushing
[START/STOP] button
on remote control?
YES
Unit operates normally.
YES
Parts (R01, R04, DB01, C01,
C03, IC01 and T01) are defective.
YES
Refer to <Primary check>
or this problem is one step
Are DC15 V, 12 V
and 7 V supplied to
secondary side of
transfeor switch?
Does transmission mark
NO
on remote control flash
normally, and is its signal
transmitted properly?
YES
motor connector
between 1 and 2
short-circuit?
Microcomputer
is defective.
Transfer swith,
NO
IC (IC01) for
power supply or
fan motor is
defective.
YES
– 58 –
FILE NO. SVM-03008
Operation
Check Item
Considerable principle cause
Measures
Item by symptoms
NO
Remote control is defective.
Refer to (5) Troubleshooting
for remote control .
Does fan
YES
NO
Replace main
P.C. board
Replace motor.