Only The Indoor Fan Does Not Operate - Toshiba RAS-10SKH-E Service Manual

9-3-7. Only the Indoor Fan does not Operate

< Preliminary checks >
Does it neither work in COOL or FAN ONLY operation?
< Check procedure >
Shut off the power
supply once.
Turn the power supply.
Does the fan
stop in no operating
status?
YES
Start the operation
with low fan setting
in cool operation.
Does the fan rotate?
YES
Change the setting of
cooling to high fan.
Does the fan speed
become higher?
YES
Normal
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.
NO
Control PC board is defective.
Is the voltage
measured DC35V
NO
between (red lead wire, +)
1
and (black lead wire, –)
2
of the motor connector
(CN10) ?
YES
Shut off the power supply.
Does the cross
flow fan rotate
normally?
YES
Turn on the power supply.
NO
Operation
stops
Is the rotation signal
(DC+5V-0V) output between
(blue lead wire) and
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
PC board.
Replace the PC board.
Shut off the power supply,
and turn it on after
NO
disconnecting the motor
connector (CN10)
the PC board.
Repair the
NO
bearing of
the drain fan.
Is the voltage of
DC35V measured
between 1 (red lead wire, +)
and 2 (black lead wire, –) of
the motor connector
4
(black
2
NO
Replace the
fan motor.
– 47 –
* from
NO
(CN10) ?
YES
Replace the
PC board.