OPERATION
Avaya
t
S9RM UPS Site Preparation, Installation and Operator’s Manual
S
05147387 Rev C
35
Battery Mode
When the UPS is operating during a power outage, the alarm beeps
once per second and the
+ ---
indicator illuminates. The front panel
displays the approximate percentage of battery capacity remaining (see
Figure 19).
>75%
>50%
>25%
Low Battery Warning
Shutdown Imminent
Figure 19. Battery Capacity Indicators
If battery capacity becomes low while in Battery mode, the
indicator
starts flashing and the alarm becomes continuous. This warning is
approximate, and the actual time to the Shutdown Imminent warning
may vary significantly.
NOTE
Depending on the UPS load and number of Extended Battery Modules (EBMs), the
Low Battery warning may occur before the batteries reach 25% capacity. See Table 10 on
page 58 for estimated runtimes.
When shutdown is imminent, the
indicator flashes. Immediately
complete and save your work to prevent data loss and similar difficulties.
If utility power returns before UPS shutdown, the UPS transfers to
Normal mode operation while the battery recharges.
If utility power returns after UPS shutdown, the UPS automatically
restarts.
