[Al Skierkiewicz]

Jalmos,
The pressure switch is not an accurate device and may not shut off the compressor until it reaches 120 psi or slightly more. If you are removing power before the compressor shuts itself off, try letting it run. If it should rise to 130 psi then disable the robot, bleed the system and check your wiring. The switch should connect back to the DSC but must not connect the red wire in the PWM cable if you are using one. As a second check, use an ohmeter or continuity checker and see if the pressure switch changes state at 120 psi +/-5 with the connector pulled out of the dsc. This most often occurs with a wiring error.