30 Chapter 4 Operator Control And Display Panel
Liebert APM 90 Integrated Modular UPS User Manual
4.2.3
Default Screen
During UPS operation, if there is no alarm within two minutes, the default screen will appear, as shown in
Figure 4-5. After a short delay, the LCD backlight will turn off. Pressing any keys (F1
~
F5) restores the default
screen.
F1
F2
F3
F4
F5
A
R
APM 90
12: 30: 36
Press any key back to main menu
Figure 4-5
Default screen
4.3
Detailed Description Of Menu Items
The description that follows refers to the LCD primary screen shown on Figure 4-3.
System information window
The system information window displays the current time and UPS name. This window requires no user
operation. For details, see Table 4-6.
Table 4-6
Item description of system information window
Item
Explanation
APM 90
UPS name
12:30:36
Current time (24hr, HH:MM:SS format)
Menu window and data window
The menu window provides the menus of the data window. The data window displays the items of the menu
selected in the menu window. UPS parameters can be browsed and functions can be set through the menu
window and data window. Details are provided in Table 4-7.
Table 4-7
Item description of menu window and data window
Menu
Item
Explanation
L-N voltage (V)
Phase voltage
L-N current (A)
Phase current
Frequency (Hz)
Input frequency
L-L voltage (V)
Line voltage
Mains
Power factor
Power factor
L-N voltage (V)
Phase voltage
Frequency (Hz)
Bypass frequency
Bypass
L-L voltage (V)
Line voltage