Toshiba RAS-18N3AV2-E, Service Manual

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(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.)
1
Start to operate
A
indoor unit in cooling
operation at airflow
B
level “LOW”.
Turn off indoor unit and
remove connector from motor.
Then start to operate indoor
unit with remote controller.
Turn off indoor unit and remove
connector from motor.
Then push [ ] button
on remote controller to stop
flashing lamp on indoor unit.
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 connector (CN31)?
(Check this condition
within 15 seconds after
starting unit.)
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
connector (CN31)?
Is it possible to detect
DC 294–325V 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).
Is it possible to detect
DC 15V between
4
+
and
3
– of motor
connector (CN31).
Does indoor
fan operate?
Peplace main
P.C. board.
YES
YES
YES
YES
YES
YES
NO
NO
NO
NO
NO
NO
Turn off power
supply once, and
turn it on again.
Is it possible to detect
DC 1V or more between
5
+ and
3
– of
motor connector (CN31).
Does fan motor
continue to operate?
Peplace indoor
fan motor.
YES
YES
NO
NO
Does check
operation LED flash?
Does check connecting
cable or power supply
cord complely?
in terconnection cable
and terminal block
NO
NO
YES
Does check
5V at display unit?
Replace
display unit
Does check 5V
at main P.C board?
Reconnecting the
NO
NO
YES
YES
YES
2
FILE NO. SVM-12056
–
73
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