Electrical Print Reading & Troubleshooting

Overview: The objective of this course is for each employee to gain the ability to “talk-through” and troubleshoot various wiring and line diagrams (relay logic) in order to isolate faulty inputs and/or outputs, replace them, and get the process back up and running.

  • The differences between a “wiring” and “line diagram” will be explained, along with the advantages and disadvantages.
  • The relationship between various input/output devices such as limit switches, contacts, relays, contactors, motor starters, etc.
  • How to troubleshoot line diagrams that contain start/stop motor control circuits and various input/output devices.
  • Why a “seal-in circuit” is used in a start/stop motor circuit and how “motor overloads” are used to protect the motor from damage will be thoroughly understood.
  • Once the ability to read existing electrical prints is achieved, the next level of instruction will be to develop line diagrams from word descriptions of processes to be controlled.

Numerous hands-on labs will involve the wiring and troubleshooting of various control circuits using DC power supplies, input devices such as inductive proximity switches, photo-electric sensors, selector switches, pushbuttons, and output devices such as contactors, relay coils, indicator lamps, etc. All wiring errors will be corrected by “talking” through the line diagram and re-wiring where necessary. The proper procedure in using a digital multi-meter to troubleshoot several control circuits will be thoroughly covered.