SIDNEY, Ohio — What is it that covers troubleshooting and basic operation of three-phase compressors for light and heavy applications, and includes a hands-on teardown to help students cement their “detective” skills?

If you answered COSS (Compressor Operation and Service Seminar), held at the Copeland Corp. factory here and at other locations throughout the year, you’d be correct. The three-day course has been offered by Copeland since 1986, and is now part of a broader selection of HVACR training programs available through the Emerson Climate Technologies family of companies.