[DavidGitz]

At your Regional, an inspector will perform the following check to ensure the Compressor is programmed and wired correctly:
Test 1:
Turn on the Robot. The Compressor should start. The Pressure gauge should increase to 120 psi. At 120 psi the Compressor should shut off.
Test 2:
Discharge System. The Compressor should start. Short the terminals of the pressure switch (meaning that it will never be an "open-circuit"). The Pressure gauge should increase to about 125 psi. At about this psi the relief valve should open venting any extra air.

This is the process they followed last year, although my psi numbers could be off slightly. I would verify this works for you guys to make sure all your wiring,programming and plumbing is good.