Toshiba RAS-18N3KV-E Service Manual page 74

(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
NO
Does check
operation LED flash?
YES
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
A
Is it possible to detect
DC 1V or more between
– of
+ and
3
5
motor connector (CN 31 ).
YES
NO
Does check connecting
cable or power supply
cord complely?
YES
NO
Does check
5V at display unit?
YES
Is it possible to detect
NO
DC 294–325V between
– of motor
+ and
1 3
connector (CN31).
YES
+ and – of
4
3
motor connector (CN31).
YES
Start to operate the
indoor unit in except
heating operation.
At this time, is it possible to
+ and – of motor
5 3
connector (CN31)?
YES
B
NO
Reconnecting the
in terconnection cable
and terminal block
Does check 5V
at main P.C board?
YES
Replace
display unit
Turn off indoor unit and remove
NO connector from motor.
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 (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.
At this time, is it possible
to detect DC 1V or more
between + and
5
of motor connector (CN31)?
(Check this condition
within 15 seconds after
starting unit.)
YES
– –
73
FILE NO. SVM-12071
and on the terminal block?
1
2
NO
NO
4 +
NO
–
3
Peplace indoor
fan motor.
Peplace main
P.C. board.