Solid date compressor motor starters from McQuay International (Minneapolis) are now standard on the company's new "C" vintage ALS air-cooled chillers. This feature is designed to offer protection from machine or electrical faults and includes self-diagnostics, metering, and display functions. Other features on the chillers include single-rotor screw compressors, high-efficiency condensers, multicircuit evaporators, and MicroTech controls.