Mitsubishi MS09NW Service Manual page 35

Check of receiver P.C. board
B
Indoor unit operates by pressing the Emergency operation switch, but does not operate with the remote controller.
Check the model name of remote
controller.
Is LCD display on remote con-
troller visible?
Yes
Remove batteries and then set them back.
Check if the unit operates with remote
controller.
Does the unit operate with remote
controller?
Yes
OK
Connect properly.
Connect properly
Replace Auto Restart Assy.
Reolace Micom P.C. board.
No
Replace batteries.(see page 31.)
(not clear)
No Turn a radio to AM and press switch on
remote controller.
Is noise heard from radio?
Are there any fluorescent lights of
inverter or rapid-start type within
the range of 3.28ft?
MS12/15/17NN
No
The connector connecting
Receiver P.C. board and Micom
P.C. board is properly fixed.
Replace Receiver P.C. board.
No
The unit receives signal of Operate
ON/OFF with remote controller,
and emits a beep tone.
END
No
The connecer of Auto Restart Assy
is properly fixed.
Replace Auto Restart Assy.
No The unit receives signal of Operate
ON/OFF with remote controller,
and emits a beep tone.
END
No The unit receives signal of Operate
ON/OFF with remote controller,
and emits a beep tone.
END
No
Yes
Yes
No
Yes
Yes
Yes
Yes
Yes
Replace remote controller.
Re-install the unit away from lights.
Attach a filter on receiving part.
MS09NW
35