Check Of Indoor Fan Motor - Mitsubishi MS09NW Service Manual

Check of indoor fan motor

A
Inodoor fan does not operate.
No
Are lead wires connected?
Reconnect lead wires
Disconnect lead wires from connector (Fan motor) on indoor electronic control P.C. board.
Measure resistance between lead wires
34
Turn OFF power supply.
Check connector (Fan motor) visually.
Yes
Is resistance 0 (short circuit) or ∞ (open circuit)?
Yes ( 0 or ∞ )
Repair indoor fan motor.
No.1 and No.3 and then No.2 and No.3 (09NW)
{
No.1 and No.4 and then No.3 and No.4 (12/15/17NN)
12/15/17NN
No
(others)
09NW
No
Is soldered point nomal?
Yes
Resolder it.
}
Replace indoor electronic control
P.C. board.
Insert screwdriver into air outlet to
rotate indoor fan motor slowly for 1
revolution or over, and measure
voltage between CN 121 1 1 ~2 2 .
Does voltage repeat 0V
DC and more than 5V?
No
Yes