Toshiba RAS-10YAV-E Service Manual page 47

(3) Only the indoor fan does not operate
Turn off the
power supply.
Turn on the
power supply.
Does the fan
NO
stop in no operating
status?
YES
Start the operation
with low fan setting
in cool operation.
NO
Does the fan rotate?
YES
Change the setting of
cooling to high fan.
NO
Does the fan speed
become higher?
YES
Normal
Control board is defective.
Is the DC 35V
measured between
(red lead wire) and
1
(black lead wire)
2
of the motor connector
(CN10) ?
YES
Turn off the power supply.
Does the cross
NO
flow fan rotate
normally?
YES
Turn on the power supply.
Operation
stops
Is the rotation signal
(DC+5V 0V) output between
4 (blue lead wire) and (black
2
lead wire) of the motor connector
(CN10) when rotating the cross
flow fan by hand in no operating
status ? (2 pulses/one turn)
YES
Replace the
control board.
– 47 –
Replace the board.
Turn off the power supply,
NO
and turn it on after
removing the motor from
the board.
Repair the
bearing of the
cross flow fan.
Is the voltage of
DC35V measured
between 1 and 2 GND of
the motor connector
(CN10) ?
YES
NO
Replace the
fan motor.
Operation
Check Item
Considerable main cause
Measures
Item by symptom
NO
Replace
the board.