Superheat is another excellent overview reference for system operation diagnosis.
manifold gauge set, a temperature tester, and a pressure-temperature chart for the refrigerant in the system. Connect the temperature tester sensor, or thermometer to the liquid line leaving the condenser and insulate it from ambient temperature. To determine the subcooling, take the saturated temperature and subtract the measured liquid line temperature from your temperature tester
Superheat is the term used to represent the amount of heat added to a refrigerant above its boiling point and is an excellent overview reference for checking system charge and performance. temperature-pressure chart for the refrigerant in the system. Close the handwheels on your manifold and loosely connect the tester sensor, or thermometer to the suction line at the condensing unit and insulate it from outdoor ambient temperature. calculate the superheat, take the measured suction line temperature from your temperature tester and subtract the converted saturation temperature.