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Troubleshooting Of The Control Circuit - Sharp AY-A079E Service Manual

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TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT
The machine does not function
at all with remote controller and
switches on the indoor unit.
Using a tester, measure the
voltage between terminal " 1 "
and " 2 " of connector CN2 on
PWB ass'y.
Is the measured value
approx. 16.0 Vac ?
YES
Replace the PWB with a new
one.
measure the secondary voltage
of transformer.
NO
Is the 2.5A fuse down ?
YES
Replace the fuse and varistor
with new ones.
17
NO
Replace the ftransformer with
a new one.
AY/AE-A079E
AY/AE-A099E

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