Mitsubishi Electric Mr. SLIM MSZ-FA25VA Technical Manual página 367

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
Check if the remote controller is exclusive for this air conditioner.
Press OPERATE/STOP (ON/OFF) button on the remote controller.
Is the LCD display on the the
remote controller visible?
Yes
Remove the batteries, then set them back
and press RESET button. (Refer to 9-1.4.)
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 9-1.4.)
(not clear)
Turn on a radio to AM and press
No
OPERATE/STOP (ON/OFF) button
on the remote controller.
Is noise heard from radio?
Yes
Are there any fluorescent lights of
inverter or of rapid-start type within
the range of 1m?
No
Replace the indoor electronic
control P.C. board.
Resolución de averías
No
Replace the remote controller.
Yes
● Reinstall the unit away from lights.
● Attach a filter on receiving part.
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