Question about Ingersoll Rand 2545/7100 Electric Air Compressor Start Up Kit 32305898
I have a 3 1/2 HP air compressor. When the air tank is empry is will start and run until full, However, when you use the air and it automatically starts to keep the air pressure up, the motor either just hums, or comes on makes a couple of turns and trips the breaker switch. Can you help?
Usally there is a releaf valve that takes the pressure off the compressor while it is resting. If that pressure is not off when the drive piston starts the motor will overload and blow the the breaker or reset. Check for a releaf valve for when the unit has reached full pressure
Posted on Jun 16, 2009
I had the exact same problem. Mine was because I had several ounces of water in my tank. I drained the tank and now it works great. I have come across others that have fixed this problem by replacing one or all of these: Check Valve, Unloader Valve, or Pressure Switch. Hope this helps your are someone else with the same issue.
Posted on Feb 14, 2013
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Posted on Jan 02, 2017
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Sep 25, 2014 | Air Tools & Compressors
It sounds like the small valve that releases the pressure out of the main pipe that runs between the compressor and tank is not working once the tank is full and the motor automatically cuts off. You know this valve is working by the sound of a short spurt if air being released when the motor cuts off. Releasing this pressure means that the motor is able to restart easily because there is no load. If the valve is not releasing this air, the compressor is trying to start under full load which the motor is not capable of doing, hence the humming and popping of breakers due to a current overload as the motor tries to start. Motor burnout is possible if it keeps recurring.
This small release valve is attached to the Pressure control switch that switches the motor On & Off and usually has a small pipe going to it or is incorporated inside the Pressure Control Switch. If the valve appears to be working then it means that the Non-return valve on the input to the tank is not sealing properly and letting air back into the main pipe causing the compressor to start under load. Check both valves for correct operation and replace as necessary.
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