Check Of Indoor Fan Motor - Mitsubishi Electric Mr.Slim MSZ09UN Service Manual

When OPERATION INDICATOR lamp flashes 3-time.
Indoor fan does not operate.

Check of indoor fan motor

G
No
Are lead wires connected?
Re-connect the lead wires.
Disconnect lead wires from connector (Fan motor).
Measure resistance between lead wires
Turn OFF the power supply.
Check connector (Fan motor) visually.
Yes
Is resistance 0 (short circuit) or ∞ (open circuit)?
Yes ( 0 or ∞ )
Repair or replace the indoor fan motor.
Is soldered point of the connector
No.1 and No.3 and then No.2 and No.3 (MSZ09UN).
{
No.1 and No.4 and then No.3 and No.4 (MSZ12UN).
MSZ12UN
No
(others)
MSZ09UN
No
49
No
correctly soldered?
Yes
Re-solder it.
}
Replace the indoor electronic con-
trol P.C. board.
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?
Yes