Toshiba RAS-M10PKVP-E Service Manual page 100

(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.)
Turn off power
supply once, and
turn it on again.
Does fan motor
continue to operate?
NO
Start to operate
indoor unit in cooling
operation at airflow
level "LOW".
Is it possible to detect
NO
Does indoor DC 310–340V between
fan operate?
1
YES
(Motor connection condition)
Is it possible to detect DC 15V
between
motor connector (CN301)?
Change airflow level
to "HIGH".
At this time, is it possible to
detect DC 1V or more between
5
NO
Is it possible to
change airflow level
to "HIGH"?
YES
rotate cross-flow fan by
and rotate cross-flow
fan by hand when the
At this time, is it possible to
detect DC 1V or more
between
Fan motor
operates normally.
Is it possible to detect
YES
DC 1V or more between
+ and
– of
5 3
motor connector (CN301)?
YES
NO
+ and
– of motor
3
connector (CN301)?
YES
NO
+ and
– of
4 3
YES
Start to operate the
indoor unit in except
NO
heating operation.
+ and
– of motor
3
connector (CN301)?
YES
NO
Is it possible to
hand properly?
YES
Turn off indoor unit
NO
unit is on standby.
+ and –
5 3
of motor connector
(CN301)?
YES
– 100 –

and
NO
Turn off indoor unit and remove
connector from motor.
Then push START/STOP button
on remote controller to stop
flashing lamp on indoor unit.
Is it possible to detect
+
DC 15V between
4
and – of motor
3
connector (CN301)?
YES
Turn off indoor unit and
remove connector from motor.
Then start to operate indoor
unit with remote controller.
Start to operate the
indoor unit in except
heating operation.
At this time, is it possible
to detect DC 1V or more
+ and
between –
5 3
of motor connector (CN301)?
(Check this condition
within 15 seconds after
starting unit.)
YES
‚
on the terminal block?
Replace indoor
fan motor.
NO
Replace main
P.C. board.
NO
Replace
bearing.