In this simulation, we'll learn the fundamentals of three-way and four-way switches. We'll cover the mechanics and inner workings of a switch, the code and safety standards that apply, as well as some common configurations that you'll likely encounter. Using interactive simulations which give you feedback at each step of the way, this simulation will give you a chance to put into practice knowledge and concepts you learn about three-way and four-way switches.

In this course, you'll learn how to diagnose and repair 5 of the most common problems that occur with a toilet. Each lesson walks you through in a 3D simulation, with step by step guidance. The faults covered include a damaged wax ring, faulty fill valve, and a broken flapper. Learning is engaging and fun in this toilet troubleshooting course!

This is an assessment simulation, where you'll use the steps and skills you've learned and practiced on the Interplay platform to determine the fault and fix each scenario. Use the bottom tool bar to navigate around the environment, inspect components, access tools, and view diagrams. This is designed to mimic a real-world scenario, so there's no step by step guide giving you instructions for how to troubleshoot the scenario.

Knowledge of basic math skills is essential to all the trades. This course will introduce you to common fractions and how to read them. You'll also learn how to convert fractions, decimals and percent. In addition to that, you will be introduced to pressure, temperature, ratios and proportions.

Learn the mathematical relationship between volts, amps, and ohms using Ohm's Law. Then apply everything you've learned about combination circuits to diagnose what isn't working on a basic circuit in the Interplay Lab.

In this course, you will learn how to troubleshoot a major component of any HVAC system. There are a number of things that can go wrong on a motor. This course covers fuses, overloads, windings, capacitors, starting relays, and fan blades. It also dives into electrical meter ratings, voltage imbalances, and offers some quick temporary fixes for seized motors.

In this course you’re going to learn about the small pipes that transfer water to and from plumbing fixtures. It begins with a couple lessons discussing tailpieces and traps, exploring the many materials, types and applications. These lessons will teach you how to properly configure tubular pipes in addition to some common errors to avoid. After that, you’ll take a look at the supply side to learn about the various supply trim parts, including supply lines and shut off valves. This short course will help you to choose the right trim parts to make sure your fixture works effectively as it's intended to.

In this course on VRF System Overview, we will explore the key processes, the different types as well as the components of the Variable Refrigerant Flow system. Within this instructional video, you will be able to identify the three common types of VRF systems such as the Heat Recovery System. You will also be able to describe the heating and cooling distribution of the VRF System through its most utilized components and refrigerant phase changes.

In this course on VRF Outdoor Unit Maintenance, we will explore processes of the inspection and cleaning for a VRF Outdoor Unit during maintenance. With each scenario, you will be guided with simulation based steps to visually inspect and properly clean coils, fan blades as well as the area around the circuit board. You will also be simulating routine system checks for consistent peak performance of the VRF Outdoor Unit.

In this series of short simulations, you'll have the opportunity to perform various maintenance procedures on a walk-in freezer. These important procedures will ensure proper system performance as well as maintain energy efficiency. You'll gain experience with coil cleaning, measuring system pressures and performance electrical checks, checking for moisture in the compressor oil, as well as verifying proper operation of the defrost system.