Read Sharp AU-A18 (serv.man12) Service Manual online
AH-AP18CS
AH-AP24CS
AU-A18CS
AU-A24CS
AH-AP24CS
AU-A18CS
AU-A24CS
16
TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT
measure the secondary voltage
of transformer.
of transformer.
YES
NO
YES
NO
The machine does not function
at all with remote controller and
switches on the indoor unit.
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.
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.
one.
Is the WPE1 fuse down ?
Replace the fuse and varistor
with new ones.
with new ones.
Replace the transformer with
a new one.
a new one.
Click on the first or last page to see other AU-A18 (serv.man12) service manuals if exist.