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2626
B Check of remote controller and receiver P.C. board
Indoor unit operates by pressing EMERGENCY OPERATION switch, but does not operate with the remote controller.
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 9-1.4.)
Switch 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 switch
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 3.28 ft.?
Yes
No
Reinstall the unit away from lights.
Attach a fi lter on receiving part.
•
•
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. 4VDC?
No (5 or 0 VDC)
Replace the receiver P.C. board.
Replace the remote controller.
Yes