Uploaded March 2026 | Updated September 2026, 3 weeks ago
Ever get called out to troubleshoot a unit you've never seen before? That's exactly the situation Roman Baugh walks into in this video — a cryotherapy chiller made in Germany with zero local manufacturer support.
Roman works through a real-world mystery HVAC unit, diagnosing a cascade chilled water system step by step: from a water pump overload alarm and bearings that have seen better days, to a high-pressure trip caused by a stuck ice cube relay and a dirty condenser coil. Along the way, he covers refrigerant pressures, motor amp draw vs. nameplate ratings, voltage verification on foreign equipment, and a few improvised fixes that only a seasoned tech would think of.
Whether you're an apprentice or a veteran, troubleshooting unfamiliar equipment is one of the most valuable skills you can develop — and watching Roman think out loud through each fault is a masterclass in systematic diagnosis.
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
Ever get called out to troubleshoot a unit you've never seen before? That's exactly the situation Roman Baugh walks into in this video — a cryotherapy chiller made in Germany with zero local manufacturer support.
Roman works through a real-world mystery HVAC unit, diagnosing a cascade chilled water system step by step: from a water pump overload alarm and bearings that have seen better days, to a high-pressure trip caused by a stuck ice cube relay and a dirty condenser coil. Along the way, he covers refrigerant pressures, motor amp draw vs. nameplate ratings, voltage verification on foreign equipment, and a few improvised fixes that only a seasoned tech would think of.
Whether you're an apprentice or a veteran, troubleshooting unfamiliar equipment is one of the most valuable skills you can develop — and watching Roman think out loud through each fault is a masterclass in systematic diagnosis.
Read all the tech tips, take the quizzes, and find our handy calculators at hvacrschool.com or the HVAC School Mobile App on the Google Play Store (hvacrschool.com/play-store) or App Store (hvacrschool.com/app-store).
