Toshiba RAS-B10UFV-E Service Manual page 84

(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.
YES
Does fan motor
continue to operate?
NO
Start to operate
indoor unit in cooling
operation at airflow
level "LOW".
NO
Does indoor
fan operate?
YES
(Motor connection condition)
Is it possible to detect DC 15V
between
Change airflow level
to "HIGH".
detect DC 1V or more between
NO
Is it possible to
change airflow level
to "HIGH"?
YES
Fan motor
operates normally.
Is it possible to detect
NO
DC 1V or more between
+ and
– of
5 3
motor connector (CN301).
YES
Is it possible to detect
DC 310–340V between
+ and
– of motor
1 3
connector (CN301).
YES
+ and
– of
4 3
motor connector (CN301).
YES
Start to operate the
indoor unit in except
heating operation.
At this time, is it possible to
+ and
– of motor
5 3
connector (CN301)?
YES
YES
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 + and –
5 3
of motor connector
(CN301).
YES
NO
Turn off indoor unit and remove
connector from motor.
NO
Then push [ ] button
on remote controller to stop
flashing lamp on indoor unit.
Is it possible to detect
DC 15V between
and – of motor
3
connector (CN301).
YES
Turn off indoor unit and
NO
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
of motor connector (CN301)?
(Check this condition
within 15 seconds after
starting unit.)
YES
NO
– 84 –
Q R
and on the terminal block?
NO
+
4
NO
–
3
Peplace indoor
fan motor.
Peplace main
P.C. board.