Obh621 - Mitsubishi Electric MS-GF20VA-E1 Service Manual

B Check of remote controller and indoor electronic control P.C. board
Check if the remote controller is exclusive for this air conditioner.
Press OPERATE/STOP (ON/OFF)
button on the remote controller.
Is LCD display on the remote controller
visible?
Yes
Remove the batteries, then set them back
and press RESET button. (Refer to 10-1.4.)
Check if the unit operates with the remote
controller.
Does the unit operate with the remote
controller?
Yes
OK

OBH621

Replace the batteries. (Refer to 10-1.4.)
No
(Not clear)
Turn ON a radio to AM and press OP-
ERATE/STOP (ON/OFF) button on the
No
remote controller.
Is noise heard from radio?
Yes
Are there any fl uorescent lights of
inverter or rapid-start type within the
range of 1 m.?
No
Replace indoor electronic control P.C.
board.
No
Yes
21
Replace the remote controller.
• Reinstall the unit away from lights.
• Attach a fi lter on receiving part.