24
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 OPERATE/STOP (ON/OFF)
button 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 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 1 m.?
Yes
No
Reinstall the unit away from lights.
Attach a
fi
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 approx. 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
Look at the image of the signal transmitting section of
the remote controller through the monitor of a digital
camera. It is normal if LED of the signal transmitting
section lights up when the OPERATE/STOP (ON/
OFF) button on the remote controller is pressed.
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
Stop the transmission of signal between
the different device and its remote control-
ler.
No
1
2
