Operation and Display Panel
Liebert
®
APS
™
44
Audible Alarms
Three different audible alarms may occur during the UPS operation; see Table 16 for a description of
the audible alarms.
Control Buttons
The operation and display panel provides two control buttons. See Table 17 for their function
descriptions.
LCD and Menu Buttons
The operation and display panel provides an LCD screen and five menu buttons (F1, F2, F3, F4, F5).
See Table 18 for the function description of each menu button.
The LCD is a 320 × 240 dot matrix graphic display. Through the LCD interface and the easily
operated menu, you can browse the UPS input, output, load and battery parameters and obtain the
current state and alarm information of the UPS. You also can perform relevant function/parameter
settings and control operations.
Figure 52 User interface module layout
Table 16 Audible alarm descriptions
Alarm sound Meaning
One beep per second When the UPS has an alarm, for example, AC fault (mains failure)
One beep every 0.5 second Upon UPS output overload or low battery voltage alarm during discharge
Continuous beep When the UPS has a fault
Table 17 Control buttons functions
Control Button
Function
ON/OFF Button Used to turn the UPS On and Off.
Alarm Silence Button
When an audible alarm sounds, pressing this button can silence the alarm. Pressing this
button again can restart the audible alarm.
Table 18 Function descriptions of menu button
Button F1 F2 F3 F4 F5
Function 1
HOME
—
To Left To Right Enter
Function 2 — ESC Exit
Up Down
—
Bypass LED Output LED
LCD
On/Off Button
Alarm Silence Button
Inverter LED
AC LED
Battery LED
Fault LED
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