A temperature controlled case is provided that includes an enclosure defining an airspace for receiving products therein, a refrigeration system configured to circulate a refrigerant through an expansion device and at least one cooling element to cool the airspace and a control module having a first predetermined setpoint corresponding to a first cooling mode and a second predetermined setpoint corresponding to a second cooling mode. The control module is configured to determine which one of the first cooling mode and the second cooling mode the refrigeration system is to operate within and to apply the corresponding predetermined setpoint for reference in modulating a position of the expansion device.