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AVR Trim
This LED illuminates to indicate the UPS is compensating for a
high utility voltage.
AVR Boost
This LED illuminates to indicate the UPS is compensating for a low
utility voltage.
B
ATTERY POWER
If the utility power fails, the UPS can provide power to the connected equipment from its internal
battery for a finite period. The UPS sounds an alarm—four beeps every 30 seconds—while operating
on battery power. The alarm stops when the UPS returns to online operation.
On Battery
When the on battery power LED is lit the UPS is supplying battery
power to the connected equipment.
Battery Charge
The five-LED display on the right of the front panel shows the present
charge of the UPS battery as a percentage of the battery capacity.
When all five LEDs are lit, the battery is fully charged. The LEDs ex-
tinguish, from top to bottom, as the battery capacity diminishes. Refer
to the figure at left for the battery capacity threshold (values are not
listed on the UPS).
As a low battery warning, any LEDs illuminated (for the given capac-
ity) flash and the UPS beeps. The low battery warning default setting
can be changed from the rear panel or through the optional Power-
Chute software. Refer to Default Settings below for details.
Overload
The UPS emits a sustained alarm tone and the LED illuminates when
an overload condition occurs. Refer to Troubleshooting in this manual.
Replace Battery
Failure of a battery self-test causes the UPS to emit short beeps for one
minute and the replace battery LED illuminates. Refer to Trouble-
shooting in this manual.
S
HUTDOWN MODE (VIA SOFTWARE OR AN ACCESSORY)
In shutdown mode, the UPS stops supplying power to the connected equipment, waiting for the re-
turn of utility power. If there is no utility power present, external devices (such as servers) connected
to the computer interface or the accessory slot can command the UPS to shut down. This normally is
done to preserve battery capacity after the shutdown of protected servers. The UPS scrolls the front
panel LEDs sequentially in shutdown mode.