Toshiba RAS-M22SKV-E Service Manual page 57

(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".
Does indoor fan operate?
YES
Is it possible to detect
DC 310–340V between
1 + and 3 – of motor
connector (CN31)?
(Motor connection condition)
Is it possible to detect DC 15V
between 4 + and 3 – of
motor connector (CN31)?
Change airflow level
to "HIGH".
Start to operate the indoor
unit in except heating operation.
At this time, is it possible to detect
DC 1V or more between
5 + and 3 – of motor
Is it possible to change
airflow level to "HIGH"?
YES
Is it possible to rotate cross-flow
fan by hand properly?
Fan motor
operates normally.
YES
NO
NO
YES
NO
YES
connector (CN31)?
YES
At this time, is it possible to detect
NO
DC 1V or more between 5 + and 3 –
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 5 + and 3 –
Is it possible to detect
DC 1V or more between
5 + and 3 – of motor
connector (CN31)?
YES
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 3 –
of motor connector (CN31)?
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.
of motor connector (CN31)?
(Check this condition within
15 seconds after starting unit.)
YES
NO
of motor connector (CN31)?
YES
– 57 –
and on the terminal block?
NO
Replace indoor
fan motor.
NO
Replace main
P.C. board.
NO
Replace
bearing.
NO