NOTE: While the UPS is operating, the LCD will dim and display a screen saver if there is no active alarm or user
interaction for 2 minutes. See Figure 4.2 below. If an alarm or fault occurs or if any button is pressed, the UPS flow
screen displays.
Figure 4.2 LCD Screen Saver
4.1 LED Indicators
The LEDs on the front Panel display indicate operation and alarm statuses of the UPS.
Indicator LED Color LED State Indicates
Run indicator Green
On UPS has output
Blinking Inverter is starting
Off UPS has no output
Alarm indicator
Yellow On Alarm occurs
Red On Fault occurs
N/A Off No alarm and no fault
Table 4.2 LED Functions
4.2 Audible Alarm (Buzzer)
An audible alarm accompanies various events during UPS operations. Table 4.3 below, describes the sounds and their
meaning. To silence an alarm, refer Silencingthe Audible Alarm on page41.
Sound Indicates
Continuous beep Generated when a UPS fault appears, such as a fuse or hardware failure.
One 0.5 second beep every 4 seconds Generated when a UPS general alarm/warning appears, such as on battery.
One 0.5 second beep every 1.5 seconds Generated when the UPS reaches low battery reserve.
One 0.5 second beep every 1 second Generated when the UPS output is overloaded.
Table 4.3 Audible Alarm Descriptions
32 Proprietary and Confidential ©2023 Vertiv Group Corp. 4 Operation and Display Panel
Vertiv™ Liebert® EXS Installer/User Guide
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