Toshiba RAS-M10PKVP-E Service Manual page 98

(3) Only the indoor motor fan does not operate
<Primary check>
1. Is it possible to detect the power supply voltage (AC220–240V) between • and , 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 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".
NO
Does indoor
fan operate?
YES
(Motor connection condition)
Is it possible to detect DC 15V
between
Change airflow level
to "HIGH".
At this time, is it possible to
detect DC 1V or more between
Is it possible to
NO
change airflow level
to "HIGH"?
YES
Fan motor
operates normally.
Is it possible to detect
YES
DC 1V or more between
and
motor connector (CN301)?
Is it possible to detect
NO
DC 310?340V between
and of motor
connector (CN301)?
YES
and of
motor connector (CN301)?
YES
Start to operate the
indoor unit in except
heating operation.
and of motor
connector (CN301)?
YES
Is it possible to
rotate cross-flow fan by
hand properly?
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
of motor connector
(CN301)?
YES
NO
of
YES
Turn off indoor unit and remove
NO
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
and of motor
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
between and
of motor connector (CN301)?
(Check this condition
within 15 seconds after
starting unit.)
YES
NO
NO
– 98 –
Replace indoor
fan motor.
NO
Replace main
P.C. board.
NO
Replace
bearing.