Read Sharp AY-AP18 (serv.man12) Service Manual online
AY-AP18CS
AY-AP24CS
AE-A18CS
AE-A24CS
AY-AP24CS
AE-A18CS
AE-A24CS
18
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
switch on the indoor unit.
at all with remote controller and
switch 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. 17.5 Vac ?
Replace the PWB with a new
one.
one.
Is the WPE1
open circuit ?
Replace the fuse and varistor
with new ones.
with new ones.
Replace the transformer with
a new one.
a new one.
OK
FAIL
Check the cleaning
switch 2(1), the connector
CN9(8) and lead wires.
Replace the cleaning switch 2(1).
(or reset connector)
(or reset connector)
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