Sharp AH-AP18CE - The Machine Does Not Function with Remote Controller

AY-AP18CE AY-AP24CE
AH-AP18CEAH-AP24CE
AE-A18CE AE-A24CE
AU-A18CE AU-A24CE
28
YES
NO
NO
YES
The machine does not function
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 ?
Using a tester,
measure the voltage
between terminals
of resistor R26
on the PWB ass'y.
Push the button "O/I".
Are batteries of the
wireless remote controller
proper ?
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
NO
YES
Replace the photo
detector unit with a new
one.
NO
YES