Liebert XDP Feature Overview, Microprocessor Control, Display, User interface keypad functions

Microprocessor Control

4.0MICROPROCESSOR CONTROL

4.1Feature Overview

The microprocessor control for the Liebert XDP features an easy-to-use menu-driven LCD. The menus, control features and circuit board details are described in this section.

Figure 22 User interface

Status Display	Up Arrow Key
	Down Arrow Key
On/Off Key
Alarm Silence Key

Active alarms are displayed on the LCD screen and sound an audible beep. To silence an alarm, press the Alarm Silence/Help key as prompted on the display.

Setpoints, DIP switch settings and other selections were made during factory testing of the unit based on typical operating conditions. (Other default selections were made according to options included with the unit.)

ADJUST THE FACTORY DEFAULTS ONLY IF THEY DO NOT MEET YOUR SPECIFICATIONS.

Allowable ranges are displayed by pressing the Help key. A password will be required (if enabled) to change setpoints, time delays, etc.

The display normally shows the leaving refrigerant temperature on the first line and alternates between the dew point and the number of alarms present on the second line.

4.1.1Display

To turn the unit On, press the On/Off (I/O) key after power is applied to the Liebert XDP. To turn the unit Off, press the On/Off (I/O) key before power is disconnected.

Table 12 User interface keypad functions

Keypad	Function
On/Off (I/O)	Turns the unit On or Off (top far left keypad)
Menu	Enables the user to access the program menu to change setpoints, alarms, etc. (top near left)
Up Arrow Key	Raises the value of displayed parameter while in a set mode (set points, time, etc).(arrow, top
	near right)
Escape (Esc)	Allows user to move back to a previous menu (top far right)
Alarm Silence	If an alarm is present, press this key to silence the alarm. Help text will appear if this key is
	pressed when no alarm is present (bottom left)
Down Arrow	Lowers the value of displayed parameter while in a set mode (set points, time, etc).(arrow,
Key	bottom near right).
Enter	After setting a control value, press ENTER to store the information in the microprocessor
	(bottom right).

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