EST3 Training Part 3: Troubleshooting & Wiring Essentials

In this episode, Anthony Richardson continues the EST3 Fire Alarm Training Series, focusing on troubleshooting, wiring, and understanding key components of the Edwards EST3 fire alarm system. He also shares real-world service stories, field tips, and essential tools for every technician.

Highlights

Troubleshooting Fundamentals:
Learn how to diagnose common issues like ground faults, open circuits, and missing resistors.

EST3 Panel Overview:
Understand the layout CPU, LEDs, relays, annunciators, amplifiers, and network connections.

5-Step Troubleshooting Process:
Identify messages, inspect wiring, test voltage, trace circuits, and replace faulty parts.

Live Ground Fault Demo:
Step-by-step explanation on using a multimeter to isolate and correct ground faults.

Key Components Explained:
ASU (Audio Source Unit), 3CPU, amplifiers, loop controllers, annunciators, and resistors.

Pro Tips:
Keep resistors intact, wire in daisy chains properly, and always remap devices after replacement.

Tools Mentioned

Multimeter

Screwdrivers, strippers, and impact drill

Laptop with EST3 programming software

Key Takeaway

Understanding how to read wiring diagrams, interpret faults, and use diagnostic tools is what separates good technicians from great ones. Practice, patience, and precision keep systems reliable and clients safe.