Emerson 480V Manuel D’Utilisation
Operator Control and Display Panel
67
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
• 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 49 Buzzer location
8.5
LCD Overview
The LCD on the front panel has five main sections, as shown in Figure 50. 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
• 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
• 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 50 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-L voltage (V )
P owerFactor
L 1-N/ L2
71.4
59.9
59.9
480
0. 99
L2-N/ L3
70.8
59.9
480
480
0. 99
L3-N/ L1
71.3
59.9
480
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
messages
F2
F4
HELP
F1
F3
?
L-N current (A)
Frequency(HZ)
L-L voltage(V)
PowerFactor
Frequency(HZ)
L-L voltage(V)
PowerFactor
L1-N/L2
71.4
59.9
59.9
480
0.99
L2-N/L3
70.8
59.9
480
480
0.99
L3-N/L1
71.3
59.9
480
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
information
Navigation
key icons
key icons