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Troubleshooting Guide Of Control Circuit - Sharp AH-N45DP2 Service Manual

Split system room air conditioners, indoor / outdoor units
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AH-N45DP2
AU-N45DP2
AH-N56DP2
AU-N56DP2

TROUBLESHOOTING GUIDE OF CONTROL CIRCUIT

The machine does not function
at all with remote controller and
switch on the indoor unit.
Check the cleaning
switch 2(1),CN9, CN8
and lead wires.
YES
Using a tester, measure the
voltage between anodes of D1
and D2 on PWB ass'y.
Is the measured value
approx. 17.5 Vac ?
YES
Replace the PWB with a new
one.
NO
Replace the cleaning switch 2(1).
(or reset connector)
measure the secondary voltage
of transformer.
NO
Is the WPE1
open circuit ?
YES
Replace the fuse and varistor
with new ones.
16
NO
Replace the transformer with
a new one.

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Ah-n56dp2Au-n45dp2Au-n56dp2