Mitsubishi Electric MSZ-G09SV-E1 Service Manual page 49

(How to check main parts)
G
Check of indoor fan motor.
Indoor fan does not operate.
Turn OFF the
power supply and
Yes
check the connector
CN 211 visually.
H
Check of remote controller and power monitor, receiver P.C. board.
Indoor unit operates by pressing the EMERGENCY OPERATION switch,
but does not operate with the remote controller.
W Check if the remote controller is exclusive for this air conditioner.
Switch on the
remote controller.
No
Is LED display on
(not clear)
remote controller
visible?
Yes
Remove batteries and set them back.
Check again if indoor unit operates
with remote controller.
Tune a radio in to
Does the unit
No
AM and press
operate with
OPERATE/STOP
remote
(ON/OFF) button
controller?
on remote
controller.
Yes
Ok
Disconnect lead wires from
CN 211 on indoor electronic
control P.C. board.
Measure resistance
between lead wire 1 and 3
and then 2 and 3.
CN211
3
2
Indoor electronic
1
control P.C. board
Replace batteries and
then press RESET
button.
See page 40.
Are there any
Is noise
fluorescent lights
Yes
heard from of inverter or
radio start type
the radio?
within 1 meter?
No
Replace the
Re-install the unit
remote
away from the lights.
controller.
Attach a filter on
receiving part.
Replace the
indoor fan motor.
Is resistance
0"(short circuit) or
∞(open circuit)?
Replace the
indoor
electronic
control P.C.
board.
Fan
motor
Replace the indoor
No
electronic control
P.C. board with
power monitor,
receiver P.C. board.
Yes
Power monitor,
receiver P.C. board
Remote
controller
49
Yes(0 or ∞)
No(othes)
LD101T
1 1
2 2
Indoor electronic
3 3
control P.C. board
4 4
5 5