Battery Mode Operation; Battery Recharge Mode - Liebert UPStation GXT 2U User Manual

7.3

Battery Mode Operation

Battery mode occurs in
event of an extreme input
voltage condition or com-
plete mains failure. The
battery system supplies
power through the DC to
DC converter to the
inverter to generate power
for the connected load.
During battery mode an alarm sounds every 10 seconds. This will
change to two beeps every 5 seconds when the battery runs low
(approximately 2 minutes remaining, but this is user configurable).
The AC Input LED will extinguish, and the Battery LED will illumi-
nate to warn that a mains problem has occurred. Each battery level
indicator represents a 20% capacity level. As capacity decreases, fewer
indicators remain illuminated. Refer to 11.0 - Troubleshooting.
For approximate battery run times, refer to 13.0 - Battery Run
Times. These times are approximates based on resistive load and an
ambient temperature of 25°C (77°F). To increase this time, turn off
non-essential pieces of equipment (such as idle computers and moni-
tors) or add the optional external battery cabinet.
CAUTION
!
Turning OFF the UPS while in battery mode will result in loss
of output power.
7.4

Battery Recharge Mode

Once mains power is restored, the UPS resumes normal operation. At
this time, the Battery Charger begins recharging.
AC INPUTBATTERY UPS ON BYPASS
Battery Mode Operation at 80-61%
18
Operating Instructions