Electric crankcase heaters and electric heater elements (Figure SP-8-4, Views A and B) are typical examples of resistive loads encountered in HVAC equipment. Once a…
Category: Service Procedures
Once the source of an electrical problem has been isolated to a malfunctioning load or control circuit (Service Procedure SP-7), the next step in the…
Purpose – This procedure describes checks and measurements used when troubleshooting an electrical problem located in the load or control circuits o f HVAC equipment.…
For residential and light commercial users, an electric utility company supplies single-phase or three-phase power to users at voltages from 115 volts to 460 volts.…
Troubleshooting electrical problems in HVAC equipment may appear complex. However, electrical troubleshooting can be simplified if the unit’s electrical components are divided into functional groupings…
Purpose – This procedure describes the input voltage measurements commonly made when installing and/or servicing single-phase and three-phase powered HVAC equipment. Measurement o f the…