Schematic Symbol Fundamentals and Translating What They Mean

Duration: 40 minutes


This HVACR technician program presents an overview of the fundamentals of schematic diagrams. With a firm understanding of the fundamentals of wiring diagrams and how symbols serve as a map of the electrical circuits in refrigeration and air conditioning systems, technicians can develop their troubleshooting skills. 

This program includes information on the fundamental concepts of atomic theory and the basics of current flow, along with information on how understanding and applying that knowledge helps technicians master the concept of tracing circuits, and to understand how switches operate in series with the loads the control.

In addition, this program also includes an interactive read-along resource guide, and a course exam consisting of multiple-choice questions and exercises that require the isolation and identification of specific circuits on a schematic diagram.

Videos contain closed captioning that can be turned on/off at the learner's convenience.

End of course review questions along with certificate of completion.



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Want to Purchase this Course for a Group?

Schools, training programs, RSES Chapters, etc., who would like to make bulk purchases of this course should contact Esco at 800-726-9696.

About Jim Johnson

Jim Johnson has been a full-time technician, as well as a full-time trade school and community college instructor and administrator, working in and around the refrigeration, HVACR, appliance, and facility maintenance fields since 1973. He has facilitated hundreds of training seminars, workshops and classes in the HVACR electrical and refrigeration areas alone, as well as many other workshops in other technical and non-technical areas.

His background includes a satellite training network for HVACR and appliance technicians, and the development and presentation of more than 75 video training programs. He has authored five textbooks and 10 technician handbooks. He has been a columnist for trade magazines for more than 20 years, including Indoor Comfort News, RSES Journal, ACHR News, ACHR News Extra Edition, HVACR Today, and Marcone World Magazine, providing monthly troubleshooting features and more than 500 feature articles. He is a member of RSES, Certified as a Residential and Light Commercial Air Balancing and Diagnostic Technician, and is certified in heat pumps. He also holds multiple certifications in combustion analysis and carbon monoxide safety.

He is a registered proctor for NATE exams, and his workshops, HVAC training videos, and e-book CD’s not only provide a simplified approach to learning about troubleshooting and servicing heating and air conditioning equipment, they also serve as an effective preparation for NATE certification exams.

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Want to See a Sample of Jim Johnson's Videos?