Chapter 3 Operation And Display Panel 25
Liebert ITA 16kVA/20kVA User Manual
3.1.3 Control Buttons
The operation and display panel provides five control buttons, which functions are described in Table 3-3.
Table 3-3 Description of control buttons
Control button
Silk screen
Description
EPO switch
EPO
Used to disconnect the load power, and close the rectifier, inverter, static
bypass and 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, pushing this button silences the audible
alarm. Press this button again can restart the buzzer
3.1.4 LCD And Menu Buttons
The operation and display panel provides an LCD and five menu buttons (F1, F2, F3, F4, HELP). Table 3-4 gives the
menu buttons function description.
Table 3-4 Menu key functions description
Function 1
Function 2
F1
F2
F3
F4
ESC
Escape
Left
Up
Right
Down
Enter
Key
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 input, output, load and battery parameters, learn about the
current UPS status and alarm message, perform functional setting and control operation. The LCD also stores up to
512 historical alarm records that can retrieve for reference and diagnosis.
3.2 LCD Screen Types
3.2.1 Start Screen
Upon UPS start, the UPS executes the system self-test, and the start screen will appear and remains about 15
seconds, as shown in Figure 3-2.
F1
F2
F3
F4
HELP
Figure 3-2 Start screen
