Liebert UPStation GXT User Manual page 13

BATTERY MODE OPERATION
Battery mode occurs in event of an extreme input voltage condition or complete
utility failure. The battery system supplies power through the DC-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 2
beeps every 5 seconds when battery runs low (approximately 2 minutes
remaining). The AC Input LED will extinguish, and the Battery LED will illuminate
to warn that a utility problem has occurred. Each load/battery level indicator
represents a 20% capacity level. As capacity decreases, fewer indicators remain
illuminated. Refer to the Troubleshooting Guide.
For battery run times, refer to the Typical Battery Discharge Curves. To increase
this time, turn off non-essential pieces of equipment (such as idle computers and
monitors) or add the optional external battery cabinet.
NOTE: External battery cabinets can only be added to rack-tower (RT) models.
CAUTION: Turning off the UPS while in battery mode will result in loss of output
power.
Figure 2 displays approximately 61-80% battery capacity remaining.
BATTERY RECHARGE MODE
Once utility power is restored, the UPS resumes normal operation. At this time,
the Battery Charger begins recharging the battery.
Figure 2 – Battery Mode Operation at 61-80% battery capacity
Fault
!
BYPASS
20-0%
40-21%
60-41%
BATTERY
80-61%
INPUT
100-81%
13
UPS
ON
AC