Service technicians often multitask and find themselves working on more than one refrigeration or air conditioning system at a time. Many times, with today’s digital service tools, a technician will remotely monitor the system for the proper operating parameters like evaporator and condensing pressures, evaporator superheat, and condenser subcooling after servicing the system.
Figure 1 shows a student service technician setting up an ammeter and Bluetooth high- and low-side pressure gauges on a compressor after fixing a leak near the liquid line solenoid valve and charging refrigerant to a glass door reach-in freezer inside a building at Ferris State University in Big Rapids, Michigan.