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Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

In this episode, I’m sharing 7 essential service and maintenance tips for transcritical CO2 refrigeration systems. These tips will help refrigeration technicians build confidence and capability in handling CO2 systems. They include building a baseline snapshot, ensuring gas cooler health, optimizing high-pressure valves, stabilizing flash tanks, maintaining proper superheat, managing oil return, and emphasizing safety. I also cover practical field checks and signs to look for when on service calls that will help your troubleshoot and make repairs more efficiently.

In this episode, we discuss:

-Building a baseline

-Gas cooler health check

-High pressure valve optimization

-Flash tank stability

-Defrost and compressor checks

-Oil management essentials

-Field techniques and observations

-Ssafety protocols and leak response

-CO2 system maintenance tips

Helpful Links & Resources:

Episode 227. Getting to Know Transcritical CO2 Supermarket Refrigeration Systems with Kevin Mullis

Episode 73: Tips And Tricks When Working On CO2 Transcritical Systems

VIDEO: Pushing Dorin CO2 Compressors to the Limit | A Deep Dive into Qualification Testing

Join the Refrigeration Mentor Hub here

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

In this episode, we take an in-depth look at compressor electrical failures. We’ll break down common issues such as burnt motor windings, short to ground, oil contamination, single phasing, and more. We’ll also cover the importance of thorough diagnostics, regular checklists, and understanding the root causes to prevent repeat failures. This episode is packed with practical tips and techniques for troubleshooting and improving your skills in refrigeration maintenance and repair.

In this episode, we discuss:

-Compressor electrical failures

-Burnt motor windings

-Short to ground issues

-Oil contamination

-Single phasing and phase imbalance

-Locked rotor and mechanical seizure

-Contactor failures and overload protectors

-Diagnosing compressor issues

-Performing an ohm test

-Understanding rated load amps

-Using manufacturer software for diagnostics

-Quick checks for compressor health

-Electrical troubleshooting tips

-Common electrical failures

-Importance of checklists

Helpful Links & Resources:

Episode 323. Electrical Troubleshooting 101

Episode 115: Understanding Compressors: What You Need To Know

Episode 12. You Need To Know About Refrigeration Compressor Electrical Issues

Join the Refrigeration Mentor Hub here

Learn more about Refrigeration Mentor Customized Technical Training Programs at www.refrigerationmentor.com/courses

In this conversation, we’re going over oil troubleshooting in refrigeration systems. This episode covers common issues like dirty systems, plugged filters, and improper system designs that can lead to oil failures. We’ll also talk about pressure differentials, proper installation practices, efficiency tests and mechanical issues like short cycling and blow-by. Understanding how to identify oil issues on service calls will help refrigeration technicians troubleshoot more efficiently and better serve your customers.

In this episode, we cover:

-Understanding oil issues in refrigeration systems

-Dirty systems

-Maintenance tips

-Pressure differentials

-Troubleshooting oil failures

-Compressor efficiency tests

-System design and installation issues

-CO2 systems and overheating problems

Helpful Links & Resources:

Episode 53. Understanding Oil Issues and Building your Technical Database

Episode 56. Two Stage Transcritical Dorin Compressors

Episode 247. Oil Management with Patrick Gregory