Low sump pressure - Ingersoll Rand Air Tools & Compressors

To troubleshoot the low sump pressure fault, check first the filter, suction line, and pump. Make sure the filter is clean, the suction line is clear, and the pump isn't seized. If these have all been checked and functioning properly, the next step is to check the differential pressure switch. This allows the pump to switch off when the sump pressure is too low or too high. If the differential pressure switch needs to be adjusted, look for the adjustment nut on the switch and for instructions on adjusting the switch in the owner's manual

Check ur belts or coupler.

Low unload sump. Would love to help but don't fully understand question. Gas as in air conditioning or refrigeration compressors low pressure (HP/LP) devise can be auto reset or if manual reset, will have a lever or button to push. If it happens often, you will need a refrigeration mechanic.

With an air compressor, make sure there is correct oil and at right level. Unless a big industrial type, there should only be a pressure regulator to control compressor electric motor. Nothing to reset. Good luck
Herman

check electrical connections orsee what the controller is saying

Engine is not getting enough oil to build the pressure. Either downpipe in sump is partially blocked or the oil pump is not good or oil filter is congested. I once opened the sump and guess what " Sump pipe was just screwed with one screw with a gap on other side causing the oil not being sucked properly". There is a pressure tester method just google it and try to find the bad oil circulation point.

this would be an expensive mistake

well with out a model number this is a tought one , but if your unit is less than 10 hp the low sump pressure is most likely caused by a dirty suction screen or worn out oil pump if its over 10 hp then low sump most likely is caused by a dirty inlet air filter

more info would help but if it is shutting down because of "low oil" then you can do one of two things but first make sure the oil is at the proper level
unplug the low oil safety switch...
fix it correctly
next time, let us know what kind of engine you have and model numbers of everything involved

Sump pressure is the back pressure created within the oil sump by pressure leaking past the piston rings. The pressure is usually very low due to the venting of the sump thru the oil sump vent (usually a tube or removable plug used for adding oil). If the vent was replaced with a plug, then pressure will be very high and cause oil leak. Higher sump pressure is also caused by adding too much oil into crank-case. If you are having other problems with compressor, post again. Good luck.

I think you have this posted in the wrong section, this is for car and truck problems. Please re-post in correct category.