Help wanted with broken ac

Really hard to guess at these things....Really gotta put guages on it...real ones, to know what's happening. Sadly, too often, a can will get put into a system that does'nt need more. A compressor is a pump, and it can only pump vapor,,,it can not pump a liquid.... this action is also harder on it that too little refrigerant as well. There should be a low pressure switch, which will isolate the compressor from the system to protect it from running with low pressure. Maybe you can check it with a multimeter and see if that's happening. If it's kicking out due to high pressure, that's tearing the compressor up everytime it tries to spin. HTH, Lefty71