33
Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller.
Check of remote controller, display receiver P.C. board and indoor control P.C. board
B
Check if the remote controller is exclusive for this air conditioner.
Replace the batteries and press the
reset button on the remote controller.
(Refer to 10-1.4.)
Press OPERATE/STOP (ON/OFF) button on the remote controller.
Is the display on the
remote controller visible?
No
Yes
Press the reset button on the
remote controller.
(Refer to 10-1.4.)
Turn on the radio and set it to AM.
Press the OPERATE/STOP (ON/OFF)
button on the remote controller. 1
Does the unit operate with
the remote controller?
No
Yes
OK
Is noise heard
from radio?
Yes
No
Replace the remote controller.
Is any remote control-
ler for other appliances
transmitting signals?
No
Yes
Stop transmitting signals
from the remote controller(s)
for other appliance(s).
Is the air condi-
tioner earthed?
No
Yes
Earth the air conditioner.
Is there any inverter
or rapid-start type
fluorescent light within
the range of 1 m? 2
Yes
●
Reinstall the air condi-
tioner away from the
fluorescent light.
●
Attach a glass filter on
the receiving part.
Press the OPERATE/STOP (ON/OFF) but-
ton on the remote controller, and measure
the voltage between CN301 (+) and (-)
on the display receiver P.C. board.
Is the voltage approximately
4 VDC to 5 VDC?
No
Replace the display receiver
P.C. board.
Replace the indoor electronic
control P.C. board.
No
2 If the inverter fluorescent light is turned on in a cool room, the signals trans-
mitted by the remote controller will be barely or not at all received.
If the room is warm, even if the inverter fluorescent light is turned on, the sig-
nals transmitted by the remote controller may be received successfully.
1 Look at the signal transmitting section of the remote controller with a digital
camera or a camera phone. If the LED on the signal transmitting section is
illuminated when the OPERATE/STOP (ON/OFF) button on the remote con-
troller is pressed, the remote controller is normal.
Yes
(not clear)
OB409E
