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(4) How to examine whether remote controller is good or bad
<Preliminary check>
1. Does setting (A/B) of the remote controller selection match with that indoor unit (switch panel) ?
NO
YES
Push the START/STOP button.
Does the transmission
indicator of remote
controller light?
Is there direct
sunlight on the
remote controller
sensor 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?
Push the RESET button at
the lower part with tip of
pencil, etc.
Replace the
P.C. board.
Replace the
remote controller.
Replace the
battery.
Normal
Remote controller
is failure.
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
NO
YES
Is the operation
enabled by setting
the TEMPORARY switch
at the air conditioner side
to COOL or AUTO?
Push the START/
STOP button
Item by symptom
Operation
Check Items
Considerable main cause
Measures