How to Service and Troubleshoot Daikin ZEAS Two-Stage CO₂ Condensing Units

This CO₂ Unfiltered session features Trevor Matthews and the Daikin team breaking down ZEAS two-stage CO₂ condensing units, field service procedures, troubleshooting strategies, controller operation, and startup best practices for technicians working on modern CO₂ systems. If you work on light commercial or supermarket CO₂ applications, this session helps simplify how ZEAS systems operate and what technicians need to understand in the field to diagnose issues faster and work more confidently. You’ll learn: ✅ How Daikin ZEAS two-stage CO₂ condensing units operate ✅ The fundamentals of two-stage CO₂ compression systems ✅ Proper startup and commissioning procedures ✅ Common field service and troubleshooting strategies ✅ How controllers, sensors, and safeties interact during operation ✅ Best practices for diagnosing alarms and system faults ✅ How to verify proper operating conditions and performance ✅ Troubleshooting approaches for pressure, temperature, and control issues ✅ Key maintenance procedures technicians should follow ✅ Real-world service insights from experienced CO₂ professionals ✅ How modern CO₂ condensing units improve efficiency and reliability ✅ What technicians should understand before working on ZEAS equipment in the field Whether you're new to CO₂ refrigeration or already servicing transcritical systems, this session delivers practical field knowledge technicians can immediately apply on the job.