25
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 10-1.4.)
Press STOP/OPERATE (
MSZ-SF·VA-
E4
,
ER4
)/OPERATE/STOP (
Other models
) but-
ton on the remote controller.
Is LCD display on the remote controller
visible?
Remove the batteries, then put them back
and press RESET button. (Refer to 10-1.4.)
Check if the unit operates with the remote
controller.
Yes
No
Turn ON a radio to AM and press STOP/OP-
ERATE (
MSZ-SF·VA-
E4
,
ER4
)/OPERATE/
STOP (
Other models
) button on the remote
controller.
Is noise heard from radio?
Yes
No
Replace the remote controller.
Are there any f uorescent lights of
inverter or rapid-start type within the
range of 1 m.?
Yes
No
• Reinstall the unit away from lights.
• Attach a f lter on receiving part.
Yes
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 approximately 4 VDC - 5 VDC?
No
Replace the indoor electronic control P.C.
board.
Replace the receiver P.C board .
Is a signal transmitted from a remote
controller of a different device?
Yes
Stop the transmission of signal between
the different device and its remote control-
ler.
No
1
2
1
If the inverter fluorescent light is turned on when the room
is cool, the unit may have difficulty receiving the signal
from the remote controller or may not be able to operate
with it; if the inverter fluorescent light is turned on when
the room is warm, the unit may be able to operate with the
remote controller.
2
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 trans-
mitting section lights up when the STOP/OPERATE (
MSZ-
SF·VA-
E4
,
ER4
)/OPERATE/STOP (
Other models
) button
on the remote controller is pressed. However, it may be
diff cult to see the illuminated LED of the signal transmitting
section with a smartphone camera.
OBH555D
