Only The Indoor Fan Does Not Operate - Toshiba RAS-13UKHP-ES3 Service Manual

9-5-7. Only the indoor fan does not operate

<Check procedure>
Heat Pump Model
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
NO
Control P.C. board is defective.
Does AC 120V
NO
or higher voltage apply
to between red and black
lead of fan motor?
Shut off the power supply.
Does the cross flow
fan rotate normally?
Turn on the power supply.
Operation
NO
stops
Is the rotation signal (DC+5V-0V)
output between
2
and (brown lead wire) of the motor
3
connector (CN11) when rotating
the cross flow fan by hand in no
operating status?
(1 pulse/one turn)
Replace the control
P.C. board.
NO
YES
Repair the
NO
bearing of
YES
(gray lead wire)
NO
YES
− 60 −
FILE NO. SVM-04001
Replace the P.C. board.
Does connecting
terminal, connecting
cable or power supply
cord completely?
Does not found the short
wire about connecting
cable and power cord?
YES
temperature rising cause
the fan.
of incompleted connecting.
Motor control circuit failure
(IC30, IC03, T01) or 12V power
circuit failure (D03, Q33).
Replace the P.C. board.
Replace the fan motor
the cable (or power cord),
NO
Thermal fuse operated
due to prevent
Replace connecting
thermal fuse and
terminal block.