AH-A129E
AU-A129E
20
TROUBLESHOOTING OF A CONTROL CIRCUIT
measure the secondary voltage
of transformer.
YES
NO
YES
NO
The machine does not function
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.
Is the measured value
approx. 20.6 Vac ?
Replace the PWB with a new
one.
Is the 2.5A fuse
open circuit ?
Replace the fuse and varistor
with new ones.
Replace the transformer with
a new one.