29
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 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 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.
•
•
Replace indoor electronic control P.C.
board.
Does the unit operate with the remote
controller?
OK
Yes
No
(Not clear)
Replace the batteries. (Refer to 9-1.4.)
Press OPERATE/STOP (ON/OFF)
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 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.
•
•
Measure the voltage between power
monitor receiver SW P.C. board connec-
tor CN20A No.2(+) and No.3(-) when the
remote controller button is pressed.
Is the voltage approximate 4 V DC?
No
Yes
Replace indoor electronic control P.C.
board.
Replace power monitor receiver SW P.C. board.
MS-GF20/25/35VA
MS-GF50/60/80VA
OBH621A
