Check Of Indoor Fan Motor - Mitsubishi Electric Mr. Slim MSH09NW Service Manual

Check of indoor fan motor

A
Inodoor fan does not operate.
No
Are lead wires connected?
Reconnect the lead wires.
Disconnect lead wires from connector (Fan motor) on indoor electronic control P.C. board.
Measure resistance between lead wires
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 normal?
Yes
Resolder it.
}
Replace the indoor electronic con-
trol P.C. board.
Insert screwdriver into air outlet to
rotate indoor fan motor slowly for 1
revolution or over, and measure
voltage between YLW and GRY of
CN 121 .
Does voltage repeat 0V
DC and more than 5V?
No
Yes
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