Purpose – The compressor is the heart of the cooling system. It creates the pressure difference that causes the refrigerant flow around the system. Compressor motors are one of the primary electrical loads used in cooling systems. Compressor checks and measurements are made mainly when troubleshooting the unit. Since compressors are expensive and their replacement can be time consuming, you want to be absolutely sure that a compressor is bad before replacing it. Compressor testing is also needed in order to isolate the fault to the compressor, compressor motor, or to a related component, such as a start or run capacitor, starting relay, etc.
