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B Check of remote controller and indoor electronic control P.C. board
Check if the remote controller is exclusive for this air conditioner.
Does the unit operate with the remote
controller?
OK
Yes
No
(Not clear)
Replace the batteries. (Refer to 8-1.4.)
Press OPERATE/STOP (ON/OFF)
button on the remote controller.
Is LCD display on the remote controller
visible?
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.
Yes
No
Turn ON a radio to AM and press OP-
ERATE/STOP (ON/OFF) button on the
remote controller.
Is noise heard from radio?
Yes
No
Replace the remote controller.
Are there any fl uorescent lights of
inverter or rapid-start type within the
range of 3.28 ft.?
Yes
No
Reinstall the unit away from lights.
Attach a fi lter on receiving part.
•
•
Replace the indoor electronic control
P.C. board.
Measure the voltage between receiver
P.C. board connector CN301 No.2(+) and
No.3(-) when the remote controller button
is pressed.
Is the voltage approx. 4 VDC?
Replace the receiver P.C. board.
MSZ-A24NA
MSY-A24NA
MSZ-A09/12/15/17NA
MSY-A15/17NA
Yes
No (5 or 0 VDC)