English guide
Overview
An introduction to the electrical and electronic components that control and protect HVAC/R systems.
Safety first
The guide covers electrical components and basic diagnostic concepts.
- Disconnect power before working on components
- Capacitors may retain a charge after power is removed; discharge them safely
Components covered
The material introduces common components and their roles:
- Contactors, capacitors, transformers, and relays
- Diode bridge rectifiers, IPM / IGBT modules, and reactors
- Sensors, protection devices, and control-board components
- Main control, inverter, fan, communication, and input/output boards