About Derek S. Coleman

Reviewed by vending machine technicians · Last updated July 12, 2026

Meet the Author

Derek S. Coleman

Vending Machine Technician

15+ Years Field Experience · Crane & Dixie Narco Specialist

Background & Credentials

Derek S. Coleman is a certified vending machine technician with over 15 years of hands-on experience in commercial vending equipment repair and diagnostics. He specializes in Crane National, Crane National Vendor, Dixie Narco, AMS, Royal Vendors, and Vendo machines.

Throughout his career, Derek has diagnosed and repaired thousands of vending machine error codes across every major brand. His expertise spans control board electronics, refrigeration systems, coin mechanisms, bill validators, and product delivery systems.

Areas of Expertise

Why Trust This Site

Every error code published on Vending DTC Hub has been verified by Derek against original equipment manufacturer service manuals and validated through field experience. When a code has multiple possible causes, Derek documents the most likely solution first based on real-world repair frequency data.

Derek is not employed by or affiliated with any vending machine manufacturer. All brand names are used for identification purposes only.

Vending DTC Hub — Independent vending machine diagnostic reference. Error code data compiled from manufacturer service manuals, field technician reports, and publicly available equipment documentation. Not affiliated with any vending machine manufacturer. All brand names are trademarks of their respective owners.