Check Of Remote Controller And Receiver P.c. Board - Mitsubishi Electric MS-A09WA Service Manual

Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller.

Check of remote controller and receiver P.C. board

B
wCheck if the remote controller is exclusive for this air conditioner.
Switch ON the remote controller.
Is LCD display on the remote con-
troller visible?
Yes
Remove the batteries, then set them back
and press RESET button. (Refer to 8-1.4.)
Check if the unit operates with the remote
controller.
Does the unit operate with the
remote controller?
Yes
OK
No
Replace the batteries. (Refer to 8-1.4.)
(not clear)
No
Turn ON a radio to AM and press switch
ON the remote controller.
Is noise heard from radio?
Are there any fluorescent lights of
inverter or rapid-start type within
the range of 3.28ft.?
Replace the indoor electronic
control P.C. board.
No
Yes
Yes
No
17
Replace the remote controller.
Reinstall the unit away from lights.
Attach a filter on receiving part.