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NO
YES
Press the START/STOP button.
Does the transmission
indicator of remote
controller light?
There is no beep from
the indoor unit.
The operation lamp of
the air conditioner main
unit does not light.
Is there direct
sunlight on the
receptor of the
air conditioner?
Avoid direct
sunlight.
Is there any
thyristor
fluorescent light
near by?
Keep the air
conditioner away
from thyristor
fluorescent light.
Is operation
possible when the
transmitter is moved
nearer to the infrared
signal receiver of the
air conditioner?
Battery life
Can any signal tone
be heard in a transistor
radio when transmitting
within 5cm distance
from the radio?
Does the
transmission
indicator light?
Is there any
receiving sound
and operation?
Short-circuit ACL switch with
a coin or others at rear side
of remote controller.
Replace
P.C. board.
Replace the
battery.
Normal
Remote controller
is failure.
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Is Temporary Cool
operation possible when
keeping the temporary
switch of the air conditioner
main unit pushed for
10 seconds or more?
Push the START/
STOP button
Item by symptom
Operation
Check Items
Considerable main cause
Measures
(5) How to examine whether remote controller is good or bad
• Does setting (A/B) of the remote controller selection match with that indoor unit?
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