My central vac is not working from any outlet.
I posting here which led me to the problem. The wires are disconnected
at the unit.
There are 2 wires coming from the unit and there are 3 wires coming out
of the wall.
When I shot the wires on the unit the vacuumm starts. I tried to
connect one of the 3 wires to the 2 wires from the unit but the vacuum
run contniously and I see a blue spark in the unit.

How do I connect the wires?
Thanks,

Praim