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Operating Instructions
18
6.3 BATTERY MODE OPERATION
Battery mode occurs in
event of an extreme input
voltage condition or com-
plete utility 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 utility problem has occurred. Each battery level
indicator represents a 20% capacity level. As capacity decreases, fewer
indicators remain illuminated. Refer to 10.0 - Troubleshooting.
For approximate battery run times, refer to 13.0 - Battery Run
Times. The times listed in these tables are approximate based on
resistive load and an ambient temperature of 77°F (25°C). To increase
this time, turn off non-essential pieces of equipment (such as idle com-
puters and monitors) or add the optional external battery cabinet.
If the UPS is manually turned OFF, it must be manually restarted
after utility power is restored.
If the UPS is turned OFF by a communication signal or because the
batteries are depleted, it will operate as selected in the configuration
program for Auto-Restart (see 8.1 - Liebert GXT2U Configuration
Program Abilities).
6.4 BATTERY RECHARGE MODE
Once utility power is restored, the UPS resumes normal operation. At
this time, the Battery Charger begins recharging.
!
CAUTION
Turning OFF the UPS while in battery mode will result in loss
of output power.
Battery Mode Operation at 80-61%
AC INPUT BATTERY UPS ON BYPASS
DISCONTINUED
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