Emerson Liebert NX 480V - Manual (Page 68)

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