40 Chapter 4 Operation And Display Panel
Liebert
®
ITA 16kVA And 20kVA UPS User Manual
4.1.3 Control Buttons
The operation and display panel provides five control buttons, the functions are described in Table 4-3.
Table 4-3 Description of control buttons
Control button
Silkprint
Description
EPO switch
EPO
Used to disconnect the load power and close the rectifier, the inverter, the
static bypass and the battery
Inverter on
ON
Used to start the inverter
Inverter off
OFF
Used to close the inverter
Fault recovery on/off
FAULT CLEAR
Recover the UPS function (clear fault in advance)
Alarm sound silence
on/off
ALARM CLEAR
When an audible alarm is active, press this button to silence the audible
alarm. Press this button again can restart the buzzer
4.1.4 LCD And Menu Buttons
The operation and display panel provides an LCD and five menu buttons (F1, F2, F3, F4, HELP). Table 4-4 gives the
function description of the menu buttons.
Table 4-4 Menu buttons function description
Function 1
Function 2
F1
F2
F3
F4
ESC
Escape
Left
Up
Right
Down
Enter
Button
HELP
HOME
LCD provides you with the user-friendly interface and the 320 × 240 dot matrix image display. The user-friendly and
menu-driven LCD allows you to easily browse through the UPS input, output, parameters of the load and the battery,
learn about the current UPS status and alarm message, perform functional settings and control operation. The LCD
also stores up to 512 historical alarm records that can be retrieved for reference and diagnosis.
4.2 LCD Screen Types
4.2.1 Start Screen
Upon UPS start, the UPS executes the system self-test, and the start screen will appear and remain for about 15
seconds, as shown in Figure 4-2.
Figure 4-2 Start screen