Hello,
I bought a new 220 v.power protector,it has 3 inlets and 3 outlets.
It is for my central air unit.
But, I have only 2 wires power.
What should I do?
I can not return the protector.
Thanks in advance.

Try to maybe sell it to someone . A central air system should be hard wired straight and directly into a disconnect that is wired directly into the main breaker box with a double pole breaker that is for the ac only