On-site Training

Electrical Troubleshooting for HVAC

  • 8:00am - 4:30pm

After an overview of electric terminology, the attendee will learn the operation of various electrical devices used in HVAC systems and the procedures for troubleshooting them.  It incorporates principles of relays and other switching mechanisms and covers the basic principles of reading schematic wiring diagrams.  The attendee will become familiar with HVAC electrical devices and circuits and will be able to use this knowledge to troubleshoot electrical controls and electrical systems in order to repair them.  This course has one lab exercise and several in which the instructor demonstrates troubles on commercial air conditioner/furnance system components.  The students work in groups of 2 or 3 using a schematic to identify faulty electrical components. Included also in this course:

  • Identifying basic electrical circuit terms, components and operation
  • Descripton of the function and operation of a circuit breaker, fuse and transformer.
  • Location, identification, and function of relay and motor starter parts, description of the operation of a relay and motor starter and identification of various relay types
  • Identification of various switch wiring arrangements and their operating characteristics.
  • Description of procedures for using various meters for troubleshooting circuits for opens, shorts and defective components.
  • Identifying the expected operation at each terminal of a thermostat
  • Identifying the expected operation at each terminal of a thermostat.
  • Identifying common symbols, demonstation of proper use of a legend and description of the operating sequence using schematic wiring diagram.
  • Demonstration of troubleshooting procedures to successfully isolate circuit problems using a refrigeration schematic wiring diagram.
  • Description of use of the black box method of troubleshooting P.C. boards
  • Description of the operation of various single-phase motors, the 3-phase motor, compressor motor starting relays and starters and motor testing procedures


Save 10%! Register by Feb 28 and pay $292.50

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