Transportation Learning Center | Evaluated Learning Experience
1. Principles of Troubleshooting (250)
Transportation Learning Center, Silver Spring, Maryland, and approved locations.
66 combined hours: Course 1: 4 hours. Course 2: 20 hours. Course 3: 26 hours. Course 4: 16 hours.
Course 1 – 4: August 2012 - Present.
Course 1: Upon successful completion of the course, students will be able to: identify mechanical issues and successfully present technical solutions. Course 2: Explain the safety rules and differences in working safely with input and output devices; identify and describe the operation and functions of various control devices, sensors, switches, and indicators used in transit elevators and transit escalators; and electrically test switches, sensors, and solid-state devices for proper operation. Course 3: Explain common safety precautions and function(s) for variable frequency drive (VF drive); identify different areas of the VF drive and those areas which can be tested; describe the function(s) of a Programmable Logic Control (PLC) to electrical and electronic drive systems; identify proper method to check the main electrical disconnect power and to check the motor protection devices; locate and record the operating parameters for a given AC drive unit; describe practices for electrical testing, troubleshooting and safety the motors and drive systems; and list common drive faults codes and common causes of drive failures. Course 4: List locations and functions of all major components in a safety circuit on elevator electrical prints; read multiple page electrical prints and functions of ladder rungs in a ladder diagram; use a logic diagram for a transit elevator and transit escalator to explain the functionality of solid-state devices; identify common devices, symbols, and printreading symbols common to ANSI and ISO prints; interpret international symbols on wiring diagrams or schematics; identify universal set of Programmable Logic Control (PLC) symbols on a ladder diagram; list safety precautions when dealing with PLC programming and explain programming design; and describe the functions and locations of all major components within each programmed command.
Course 1 – 4: Instruction is offered via classroom through use of study guides, required and supplemental readings, quizzes, in lab or on-hands at work site(s), required interaction with instructor, and final exams.
Course 1 – 4: In the lower division baccalaureate/associate degree category, 5 semester hours in Mechanical Systems (8/17). Note: All four courses must be completed to gain access to the credit recommendation.