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

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

< Check procedure >
Shut off the power
supply once.
Turn the power supply.
NO
Does the fan 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 P.C. board is defective.
Does AC 120V
or higher voltage apply
to between red and black
lead of fan motor?
YES
Shut off the power supply.
Does the cross 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 2 (black
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
P.C. board.
– 50 –
Does connecting
terminal, connecting
cable or power supply
NO
cord completely?
Does not found the short
wire about connecting
cable and power cord?
YES
Repair the
NO
bearing of
the fan.
Motor control circuit failure
(IC30, IC03) or 12V power
circuit failire (D03, Q03).
Replace the P.C. board.
NO
Replace the
fan motor
Replace the P.C. board.
NO
Thermal fuse operated
due to prevent
temperature rising cause
of incompleted connecting.
Replace connecting the
cable (or power cord),
thermal fuse and
terminal block.