30
Indoor unit operates by pressing the emergency operation switch, but does not operate with the remote controller.
Check of remote controller,receiver P.C. board and indoor electronic control P.C. board
B
* Check if the remote controller is exclusive for this air conditioner.
Receiver
P.C. Board
CN301
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 10-1.4.)
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 fluorescent lights of
inverter or rapid-start type within
the range of 3.28 ft. (1 m)? *2
Yes
No
• Reinstall the unit away from lights.
•
Attach a filter on receiving part.
Replace the receiver P.C. board.
Assign a number of remote controller.
(Refer to 7-2.)
Check if the unit operates with the
remote controller.
Does the unit operate with
the remote controller?
Yes
No
OK
Measure the voltage between receiver P.C. board connector CN301 (+) and (-) when
the remote controller button is pressed.
Is the voltage approximately 4 V DC - 5 V DC?
No
Yes
Replace the indoor electronic
control 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 difficult to see the
illuminated LED of the signal transmitting section with a
smartphone camera.
*
2 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.
OBH802B
