Case and coldroom controllers Refrigeration controllers of the UA 300 series are designed to control refrigerated display cases and coldrooms (both normal- and low-temperature refrigeration). The particular application - refrigerated multideck, refrigerated counter, freezer island case, walk-in freezer, etc. - and the defrost method are set directly on the controller by DIP switch. The new UA 300 E controller for refrigeration points equipped with electronic expansion valves is suitable for all applications: chiller and freezer display cases, refrigerated counters, freezer islands and reach-ins, walk-in freezers and chillers. Pulse-width modulation of the valves allows optimum control of superheat. The UA 300 E is capable of indepently controlling two EEVs. All case and coldroom controllers contain an intelligent emergency operation routine covering all normal control functions. The controllers are supplied for installation in display cases (with or without a local operator unit) and for control panel mounting. They can optionally be had with a CAN interface for networking and connection to the store computer or with internal real-time clock.