A “grounded compressor” or “compressor short to ground” means that an electrical winding inside the compressor has broken and hit the side of the compressor. This causes a direct short to ground, igniting the oil and causing a burnout. And, of course, the circuit breaker trips due to the sudden current surge.Click to see full answer. Just so, how do I know if my compressor is grounded? If you find all the ohm measurements are correct: Set your ohm meter to its highest range. Place on meter lead on the metal case of the condenser (make sure you scrape of any rust or paint to make sure good contact) Measure each pin to the ground. Any measurement that does not read infinite indicates a grounded winding. Similarly, what does a grounded motor mean? Electrical motor windings are normally insulated from all mechanical parts of the motor. Both methods effectively create a solid electrical connection directly to the stator laminations so that any insulation failure is grounded through the ground conductor attached to the motor by the end user. Secondly, what causes compressor burnout? Compressor burnout is a very specific mode of failure that may be caused by high temperatures in the motor windings or discharge area of the compressor. High temperatures break down the motor winding insulation, which may cause a loss of electrical resistance and result in a short to the ground or even an open winding.What causes compressor to fail?After floodback and slugging, Park said the major causes of compressor failure, in order of importance, include bad contactors, system leaks, dirty evaporators, dirty filters, dirty condensers, rapid loading/unloading, mis-wired/misadjusted controls, low superheat, and wrong oil for the system refrigerant.