Once a switch or set of contactor/relay switched contacts (F ig u re SP-8-4) have been identified as the probable cause of an electrical problem…
Inductive loads include relay and contactor coils, compressor motors, and fan motors (Figure SP-8-4). They also include control transformers, solenoid valves, and some gas valves.…
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…
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.…