Read Sharp AU-A129 Service Manual online
AH-A129E
AU-A129E
AU-A129E
20
TROUBLESHOOTING OF A 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 meter, measure the
voltage between anodes of D1
and D2 on the PWB ass'y 1.
voltage between anodes of D1
and D2 on the PWB ass'y 1.
Is the measured value
approx. 20.6 Vac ?
Replace the PWB with a new
one.
one.
Is the 2.5A fuse
open circuit ?
Replace the fuse and varistor
with new ones.
with new ones.
Replace the transformer with
a new one.
a new one.
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