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Sharp AH-A07BE Service Manual page 25

Split system room air conditioners
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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 anodes of D1
and D2 on PWB ass'y.
Is the measured value
approx. 17.0 Vac ?
YES
Replace the PWB with a new
one.
measure the secondary voltage
of transformer.
NO
Is the 3.0A fuse down ?
YES
Replace the fuse and varistor
with new ones.
25
NO
Replace the ftransformer with
a new one.
AH-A07BE-C/09BE-C
AH-A07BE/09BE/12BE
AY-A07BE-C/09BE-C
AY-A07BE/09BE/12BE

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