Service Manual

31
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 9-1.4.)
Press STOP/OPERATE (OFF/ON)
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 9-1.4.)
Check if the unit operates with the remote
controller.
Yes
No
Turn ON a radio to AM and press STOP/
OPERATE (OFF/ON) button on the remote
controller.
1
Is noise heard from radio?
Yes
No
Replace the remote controller.
Are there any uorescent lights of
inverter or rapid-start type within the
range of 3.28 ft.(1m)?
2
Yes
No
• Reinstall the unit away from lights.
•
Attach a lter on receiving part.
Replace the indoor electronic control
P.C. board. (Including the receiver)
MSZ-GL24NA
MSY-GL24NA
Does the unit operate with the remote
controller?
OK
Yes
No
(Not clear)
Replace the batteries. (Refer to 9-1.4.)
Press STOP/OPERATE (OFF/ON)
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 9-1.4.)
Check if the unit operates with the remote
controller.
Yes
No
Turn ON a radio to AM and press STOP/
OPERATE (OFF/ON) button on the remote
controller.
1
Is noise heard from radio?
Yes
No
Replace the remote controller.
Are there any uorescent lights of
inverter or rapid-start type within the
range of 3.28 ft.(1m)?
2
Yes
No
• Reinstall the unit away from lights.
•
Attach a lter on receiving part.
Measure the voltage between power moni-
tor receiver SW P.C. board connector CN20A
No.2(+) and No.3(-) when the remote controller
button is pressed. (Refer to 9-7.5.)
Is the voltage approximately 4 VDC?
No
Yes
Replace indoor electronic control P.C.
board.
Replace power monitor receiver SW P.C. board.
1 Look at the image of the signal transmitting section of
the remote controller through the monitor of a digital
camera or a camera phone. It is normal if the LED of
the signal transmitting section lights up when the STOP/
OPERATE (OFF/ON) button on the remote control-
ler is pressed. However, it may be difcult to see the
illuminated LED of the signal transmitting section with a
smartphone camera.
2 If the inverter uorescent light is turned on when the
room is cool, the unit may have difculty receiving the
signal from the remote controller or may not be able to
operate with it; if the inverter uorescent light is turned
on when the room is warm, the unit may be able to
operate with the remote controller.
1 Look at the image of the signal transmitting section of
the remote controller through the monitor of a digital
camera or a camera phone. It is normal if the LED of
the signal transmitting section lights up when the STOP/
OPERATE (OFF/ON) button on the remote control-
ler is pressed. However, it may be difcult to see the
illuminated LED of the signal transmitting section with a
smartphone camera.
2 If the inverter uorescent light is turned on when the
room is cool, the unit may have difculty receiving the
signal from the remote controller or may not be able to
operate with it; if the inverter uorescent light is turned
on when the room is warm, the unit may be able to
operate with the remote controller.
MSZ-GL06/09/12/15/18NA
MSY-GL09/12/15/18NA
OBH732C