13
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote con-
troller.
●
Reinstall the unit away from lights.
●
Attach a filter on receiving part.
Switch on the remote controller
Is LCD display on remote controller
visible?
Replace the batteries.(Refer to 9-1..)
Remove batteries and then set them back and press
the RESET button. Check if the unit operates with
remote controller.
Does the unit operate with remote controller?
Turn on a radio to AM and press
switch on remote controller.
Is noise heard from radio?
Replace the remote controller.
Are there any fluorescent lights
of inverter or rapid-start type
within the range of 1m?
Measure the voltage between receiver P.C.board connector No.2(+)and No.1 when remote controller button is pressed.
Is the voltage approx. 4V DC?
No
(5V DC or 0V DC)
Replace the receiver.
No
(not clear)
Yes
Yes
No
OK
No
Yes
Yes
Yes
No
Replace the indoor
electronic control P.C. board.
No
w
Check if the remote controller is exclusive for this air conditioner.
Check of indoor electronic control P.C. board
C
The unit doesn’t operate with the remote controller.
Also, the OPERATION INDICATOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
Replace the fuse.
Trouble of the indoor electronic
control P.C. board.
Yes
No
No
Yes
Is fuse(F11)blown?
Be sure to check both fuse
and varistor in any case.
Is varistor(NR11)burnt?
Replace the varistor.
Check of remote controller and receiver P.C. board
B
Check both “parts side”and “pattern
side” of indoor electronic control P.C.
board visually.
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