Audible Buzzer; Lcd Overview; Figure 43 Buzzer Location; Figure 44 Sections Of The Lcd - Emerson Liebert NX 480V User Manual

40-120kva, 480v, 60hz
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8.4

Audible Buzzer

The buzzer produces three types of sounds:
• Single beep - when any control button is pressed
• Single beep repeating every two seconds - the system has a general alarm
• Continuous - the system has a serious fault
If the buzzer makes no sound, the system may be operating properly, or an alarm may have been
silenced manually.

Figure 43 Buzzer location

Buzzer
8.5

LCD Overview

The LCD on the front panel has five main sections, as shown in Figure 44. Press the F1 key below
the LCD to scroll through these sections.
• UPS System Information - view UPS name and model, date and time, overall status (see
Table 18).
• LCD Menu - choose a category of data items to appear below the menus (see Table 19).
• Data and Settings - view data items for the selected menu (see Table 19).
• Current Status Messages - check any active UPS event and alarm messages (see Appendix A).
• Navigation Key Icons - look at the icon above each navigation key to determine how the key
operates when pressed (see 8.6 - Navigation Keys).
The LCD displays alarm information in real time. After appearing in the current status section of the
LCD, status messages are stored in the history log—512 records can be stored and retrieved.

Figure 44 Sections of the LCD

LCD menu
Data and settings
Current status
messages
Liebert NX
80kV A-3X 3
Main
LED1
L-N current (A)
Frequency (HZ)
LED4
LED2
LED5
L-L voltage (V )
P owerFactor
LED3
Input disconnect closed
Output disconnect closed
Bypass abnorm al
STATUS
F1
F2
Liebert NX
2007-01-06
80kVA-3X3
Main
Bypass
L1-N/L2
L-N current (A)
71.4
Frequency(HZ)
59.9
L-L voltage(V)
480
PowerFactor
0.99
Input disconnect closed
Output disconnect closed
Bypass abnormal
F1
F2
2007-01-06
09:20:37
S ingle
Norm al
Bypass
Output
L2-N/ L3
L3-N/ L1
L 1-N/ L2
71.4
70.8
71.3
59.9
59.9
59.9
480
480
480
0.99
0. 99
0. 99
INVER TER OFF
01-06 09:15
01-06 09:15
01-06 09:15
INVER TER ON
?
F4
F3
HELP
09:20:37
Single
Normal
Output
L2-N/L3
L3-N/L1
70.8
71.3
59.9
59.9
480
480
0.99
0.99
01-06 09:15
01-06 09:15
01-06 09:15
?
F4
F3
HELP
60
Operator Control and Display Panel
EPO
FAULT C LEAR
SILENC E ON/OFF
UPS system
information
Navigation
key icons

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