28
Yes
Check of remote controller and receiver P.C. board
B
Indoor unit operates by pressing the EMERGENCY OPERATION switch, but does not operate with the remote controller.
Replace the batteries.
Turn on a radio to AM and press switch on
the remote controller.
Is noise heard from radio?
Are there any fluorescent lights of
inverter or rapid-start type within
the range of 1m?
Replace the remote controller.
• Re-install the unit away from lights.
• Attach a filter on receiving part.
Switch on the remote controller.
Is LCD display on the remote con-
troller visible?
Remove batteries and then set them back.
Check if the unit operates with the remote
controller.
Yes
Does the unit operate with the
remote controller?
Yes
OK
No
(not clear)
Yes
No
No
No
w
Check the remote controller is exclusive for this air conditioner.
w
Replace the receiver P.C. board together with the indoor control P.C. board.
Replace the indoor electronic control P.C.
board with receiver.
Check of indoor electronic control P.C. board
C
Check both “parts side”
and “pattern side” of indoor
electronic control P.C.
board visually.
Replace the fuse.
Is fuse(F11) blown?
Be sure to check both fuse
and varistor in any case.
Replace the fan motor .
Trouble of the
indoor electronic
control P.C. board.
Is winding resistance
of fan motor 0
"
?
Is winding resistance
of vane motor 0
"
?
No
Yes
Replace the vane motor. .
No
Yes
Yes
Is varistor(NR11) burnt?
Replace the varistor.
Yes
Turn OFF the power supply.
Remove indoor fan motor connector CN211 and vane motor connector CN151
from the ELECTRONIC CONTROL P.C. board and turn on the power supply.
No
No
The unit doesn’t operate with the remote controller.
Also, the Operation Indicator lamp doesn’t light up
by pressing the EMERGENCY OPERATION switch.
No
Yes
Be sure to check both resistance.
The unit doesn’t operate with the remote controller.
Also, the POWER MONITOR lamp doesn’t light up by pressing the EMERGENCY OPERATION switch.
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