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3.4 Direct Access Push Buttons—Keys
The NX Remote Monitoring Panel has one direct access push button: Silence ON/OFF. The Silence
ON/OFF button is a toggle type buzzer mute; any new fault re-enables the buzzer.
3.5 LCD Monitor and Menu Keys
The menu-driven, 320 x 240 dot graphic LCD monitor displays real time data and, at the same time,
stores 512 historical records that can be retrieved for reference and diagnosis.
The user can perform commands or browse through the input, output, load and battery parameters.
For quick reference, the UPS status and any warnings are always highlighted without the need of
navigating through the menu. The versions of converter firmware, inverter firmware and internal
monitor firmware can also be displayed on the LCD.
Menu keys F1 to F4 are used to navigate within the graphic LCD monitor windows.
Figure 14 Graphic LCD monitor windows and keypad
The function of keys F1 to F4 is shown by a self-explanatory icon as appropriate for the particular
window. As shown in Figure 14 above, pressing F1 moves the cursor (resting in “OUTPUT”) from the
UPS Menu Window (2) to current record window (4) where it would first rest in “Input breaker closed’.
In a similar manner, pressing F2 would move the cursor from the Output data window to the Bypass
data window.
Table 10 Menu key Icons and their meaning
Key F1 F2 F3 F4 Help
Window Type 1
Next Data Window
LEFT RIGHT
ENTER
HELP
Window Type 2
Escape
UP DOWN
?
ESC
Liebert NX
20kVA 3X3
?
Output
2006-10-22
Unit #1
17:32:20
Normal
F2 F3 F4 HELPF1
Bypass
Main
L-N
Vphase V 220
Iphase A 20.5
Freq. Hz 50.1
Vline V 380
P.F. 0.99
Input breaker closed 01-12 12:28:16
Manual turn on 01-12 12:30:06
UPS in normal mode 01-22 12:30:16
4 - Current Record
Window
3 - UPS Data
Window
2 - UPS Menu
Window
1 - UPS System
Window
5 - Keypad Window