YES
NO
NO
YES
The machine does not function
at all with remote controller
Push button "O/I" on the
wireless remote controller.
Is transmitting
indicator of the remote
controller active ?
Is indicator lamp of
indoor unit proper ?
Replace the
PWB with a
new one.
Does beep sound
from the indoor unit ?
Does connector
CN103 connect in place ?
Using a tester,
measure the voltage
between terminals
of resistor R30
on the PWB ass'y.
Push the button
"O/I".
Are batteries of the
wireless remote controller
good ?
Replace the batteries
with new ones.
Replace the wireless
remote controller.
When the signal is
received, does the voltage
change ?
Replace the PWB with a new
one.
PWB is normal.
Inspect the outdoor unit.
NO
YES
YES
NO
YES
Replace the display unit
with a new one.
Connect the
connector
properly.
NO
YES
NO
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