How does a screw compressor work?

A screw compressor can run loaded ('pumping air') or unloaded ('idle'). The inlet/loading valve opens and closes according to air demand. The inlet valve is controlled by a solenoid valve that supplies control air to the inlet/loading valve. Check solenoid valve coil and solenoid valve operation.

Why does my compressor trip on over temeprature?

If your compressor trips on over temeprature, it could be any of the following: Ambient temperature too high or not enough ventilation. A screw compressor can run loaded ('pumping air') or unloaded ('idle'). The inlet/loading valve opens and closes according to air demand.

How do I know if my oil separator is working?

Compressor does not unload. Check if pressure switch is correctly set and working. Check inlet valve and loading solenoid for good operation. If the safety valve is located before the oil separator, check differential pressure of oil separator. Oil in compressed air can have various causes: Water is a natural by product of air compression.

What causes oil in compressed air?

Oil in compressed air can have various causes: Water is a natural by product of air compression. There will always be water in compressed air, unless we remove it. Check the condensate trap for good operation. There should be water coming out every few minutes. If you open up the manual drain, there should only a little water be coming out.

How do I know if my air compressor is working?

If you have a compressed air dryer, check the dewpoint. Check the current draw with a current clamp meter. If the motor draws exeessive current: Try to turn the compressor by hand. It should be possible to turn it around. It should turn around smoothly, without any 'hickups' (be sure to completely shut down the air compressor!).