Operate, maintain, troubleshoot and repair:Work will include, but not limited to, handling refrigerants, troubleshooting control systems, modifying ductwork, filter changes, replacement of motors and compressors, and installing all other OEM replacement parts and components. HVAC systems from 1-ton mini splits up to 140-ton package units integrated into a Building Automation System (BAS) controlling over 150 VAV/FPB climate control zones.