About Safety

About this Class

The most important part of an electric truck is the control that operates the electrical components. Knowledge of this control -how it works, and how it operates the other components -is vital to maintenance and service. This class is designed to teach you how the EV-T5 MOSFETs Control operates and how you can diagnose and troubleshoot problems with the control. The EV-T5 CONTROL is an electronic device that controls electrical power supplied to the vehicle drive motor to provide smooth power to move the truck and to minimize power drain from battery. The control consists of a Transistor unit and a contactor assembly unit. The Transistor unit monitors power demand of the truck and then responds by controlling the power applied to drive components. The contactor panel contains switching devices to direct heavy power loads to the drive motor and its components. Class Objectives

There are two primary objectives for this class. Upon completion of the manual and the class you will be able to: 1. Trace each sequence of operations on a basic wiring diagram as a way to demonstrate your understanding of the control and its operation 2. Make preliminary diagnosis of and troubleshoot problems related to the control and its components. These objectives are intended to give you a sound understanding of how the Control works and lay a groundwork for problem diagnosis and troubleshooting. Class Content

There are two major sections in this book that will be covered in the class; the Sequence of Operations and Troubleshooting. Sequence of Operations This section includes:

• a list of abbreviations used in the text and on the wiring diagram • a legend defining the symbols used on the diagrams • a list of the control sequence of operations • a wiring diagram for each sequence.