Only The Indoor Motor Fan Does Not Operate - Toshiba RAS-B10N3KV2-E Service Manual

(3) Only the indoor motor fan does not operate

<Primary check>
1. Is it possible to detect the power supply voltage (AC220–240V) between
2. Does the indoor fan motor operate in cooling operation?
(In heating operation, the indoor fan motor does not operate for approximately 10 minutes after it is turned
on, to prevent a cold air from blowing in.)
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 120 V
NO
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.
NO
Operation
stops
Is the rotation signal (DC+5 V
output between 2 (gray lead wire)
and 3 (brown lead wire) of the motor
connector (CN33) when rotating the
cross flow fan by hand in no operating
status? (1 pulse/one turn)
YES
Replace the control
P.C. board.
terminal, connecting
cable or power supply
NO
Does not found the short
wire about connecting
cable and power cord?
Repair the
NO
bearing of
the fan.
Motor control circuit failure
(IC31, Q301) or 12 V
Switching power supply failure.
Replace the P.C. board.
−
0 V)
NO
Replace the fan motor.
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71
FILE NO. SVM-12050
Q R
and on the terminal block?
Replace the P.C. board.
Does connecting
NO
cord completely?
YES
Replace connecting the
cable (or power cord),
thermal fuse and
terminal block.