3Com Powerware Uninterruptible Power System Prestige Series - Manual (Page 55)

UPS Operation
49 Powerware ® Prestige Series Installation and Operator’s Manual for IBM Applications (3000 VA) Uncontrolled Copy
Bypass Mode
The

indicator and the indicator illuminate simultaneously,
indicating Bypass mode (see Figure 14). When the UPS is in Bypass
mode, the load is powered by utility power. However, utility power
continues to be passively filtered by the UPS.
LOAD ON
UNIT ON
BYPASS
OVERLOAD
SITE FAULT
OVERTEMP
BATTERY
SELF TEST
Figure 14. Bypass Operation Indicators
Battery Mode
When the UPS is operating during a power outage, the alarm beeps
several times initially, and then once every 10 seconds while in Battery
mode. The
indicator illuminates. The front panel displays the
approximate percentage of battery capacity remaining. You can calculate
the approximate minutes of battery time by multiplying the “Total
Battery Time Minutes” (see Figure 3 on page 3) times the percentage
indicated by the Battery Operation indicators (see Figure 15). When the
utility power returns, the UPS switches to Normal mode operation while
the battery recharges.
BATTERY
ONLINE
>75%
CAPACITY
REMAINS
BATTERY
ONLINE
>50%
CAPACITY
REMAINS
BATTERY
ONLINE
>25%
CAPACITY
REMAINS
BATTERY
ONLINE
BATTERY
ONLINE
SHUTDOWN
IMMINENT
LOW
BATTERY
WARNING
OVERLOAD
SITE FAULT
OVERTEMP
BATTERY
SELF TEST
Figure 15. Battery Operation Indicators
If battery capacity becomes low while in Battery mode, the Battery Fault
indicator begins to flash and the Self Test indicator remains lit,
indicating approximately two minutes before UPS shutdown. The alarm
beeps every two seconds.