Chapter 4: E2 Controller
Figure
4.5.2 Information Menu Loop
The Info menu screens may be accessed from the Main screen by simply scrolling with the Up 
and Down 
arrow keys. The same screens may also be viewed if you enter the Info menu by pressing the “Prg” key. The Info menu displays screens that provide current temperature and relative humidity conditions and shows the modes the A/C system is currently operating. There are no adjustable parameters in this loop. From the Info loop, you may view the following display screens as they apply to the unit configuration:
4.5.2.1 Operating Conditions
The first Info screen displays the current date and time, and provides state of operation icons.
The actual control temperature (° F) and relative Humidity (rh) is always displayed, and dewpoint (Dp) will appear as derived from the control T/H sensor selection. The values displayed are used by the controller to develop control output signals for managing system operations.
4.5.2.2 Return Temperature Sensor
Displays relative humidity as measured by the return temperature/humidity (T/H) sensor inputs. The return T/H sensor is typically factory mounted inside the cabinet. As an option, the return T/H sensor may be removed from the cabinet and remotely mounted in the hot aisle.
4.5.2.3 Return Humidity Sensor
Displays relative humidity as measured by the return T/H sensor inputs. Return dewpoint is calculated by the controller based on the return T/H sensor inputs and then shown at the bottom of the display screen.
4.5.2.4 Temperature Sensors
The temperature screens display the supply air temperature as measured by sensors located in the cold aisle side of the Cold Row cabinet. The sensors are located within the cabinet in upper, middle, and lower zones as called out in the display. Values measured by the sensors may be used to individually control the speeds of the fans (see Section 4.4.4.1).
Screen Lock Feature
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