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Check of remote controller and receiver P.C. board
B
Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller.
wCheck if the remote controller is exclusive for this air conditioner.
Yes
Replace the batteries. (Refer to 8-1.4.)
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 remote controller.
● Reinstall the unit away from lights.
● Attach a filter on receiving part.
Switch ON the remote controller.
Is LCD display on the remote con-
troller 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
Does the unit operate with the
remote controller?
Yes
OK
No
(not clear)
Yes
No
No
Replace the receiver 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. 4V DC?
Replace the indoor electronic control P.C.
board.
No (5V or 0V DC)
Yes
MSZ-A09/12/15/17NA
MSY-A15/17NA
MSZ-A24NA
MSY-A24NA
No
OB450B-1.qxp 07.5.14 4:13 PM Page 19