AYAP7FHR
4 – 1
AYAP7FHR
Service Manual
CHAPTER 4.
TROUBLESHOOTING
[1] TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT
measure the secondary voltage
of transformer.
YES
NO
YES
NO
The machine does not function
at all with remote controller and
switches on the indoor unit.
Using a tester, measure the
voltage between anodes of D1
and D2 on PWB ass'y.
Is the measured value
approx. 17.0 Vac ?
Replace the PWB with a new
one.
Is the FUSE1 fuse down ?
Replace the fuse and varistor
with new ones.
Replace the transformer with
a new one.
YES
NO
NO
YES
The machine does not function
with remote controller
Push button "OI" 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 R8
on the PWB ass'y.
Push the button "OI".
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
