OB274-36
Check of indoor fan motor
A
Indoor fan does not operate.
Turn OFF the power supply.
Check connector (Fan motor) visually.
Repair or replace the indoor fan motor.
Disconnect lead wires from connector (Fan motor).
Measure resistance between lead wires No.1 and No.3 and then No.2 and No.3 (MS09)
Are lead wires connected?
Re-connect the lead
wires.
Is soldered point of the connector
correctly soldered?
Replace the indoor electronic con-
trol P.C. board.
Re-solder it.
Is resistance 0 (short circuit) or (open circuit)?
Yes ( 0 or )
No
(others)
Yes
No
Yes
No
{
}
No.1 and No.4 and then No.3 and No.4 (MS12/15/17)
MS12/15/17
MS09
Insert screwdriver into air outlet and
rotate indoor fan (motor) slowly for
1 revolution or more, and measure
voltage between CN 121
1
-
2
.
Does voltage repeat 0V DC
and more than 5V DC?
Yes
No
