Only Indoor Fan Motor Does Not Operate - Toshiba RAS-M10UKV-E3 Service Manual

(3) Only indoor fan motor does not operate.

<Preliminary check>
1 Is it possible to detect the power supply voltage (200 – 240V) between 1 and 2 on the terminal block?
2 Does the indoor fan motor operate in cooling operation?
(In heating operation, the indoor fan motor does not operate for
approximately 5 minutes after it is turned on, to prevent a cold air
from blowing in.)
Turn off power
supply once, and
turn it on again.
Does
YES
compressor
continue to
operate?
NO
Start to operate
indoor unit in
cooling operation
at airflow
level "LOW".
NO
Does indoor
fan operate?
YES
Change airflow
level to "High".
Is it possible to
NO
change airflow
level to "High"?
YES
Fan motor
operates normally.
Is it possible to detect
DC 1V or more between
5 and 3
d
of motor
e
connector (CN10).
YES
Is it possible to detect DC
310 – 340V between
1 and 3
d
of motor
e
connector (CN10).
YES
(Motor connection condition)
Is it possible to detect DC 15V
between 4 and 3
d
e
motor connector (CN10).
YES
Start to operate the
indoor unit. At this time, is it
possible to detect DC 1V or
more between 5e and 3d
of motor connector (CN10)?
Is it possible to rotate cross-
flow fan by hand properly?
Turn off indoor unit and rotate
cross-flow fan by hand when the
unit is on standby. At this time,
is it possible to detect DC 1V or
more between 5e and 3
of motor connector (CN10).
YES
NO
NO
Turn off indoor unit
and remove connector
from motor. Then press
START/STOP button
NO
on remote control to
stop blinking lamp on
of
indoor unit.
Is it possible to detect
DC 15V between 4
and 3
d
NO
connector (CN10).
Turn off indoor unit
and remove connector
from motor.
NO Then start to operate
indoor unit with
remote control.
Start to operate the indoor
NO
unit in except heating
operation. At this time, is it
d
possible to detect DC 1V
or more between 5e and
3d of motor connector
(CN10)? (Check this
condition within 15 seconds
after starting unit.)
– 87 –
NO
e
of motor
NO
YES
Operation
Check item
Conceivable principle
cause
Measure
Item by symptoms
Replace indoor
fan motor.
Replace main
P.C. board.
Replace bearing.