v Configuration
Normal mode
During Normal mode, the Power-on LED is lit and the front panel displays the
percentage of uninterruptible power supply load capacity being used by the
protected connected devices. The uninterruptible power supply monitors and
charges the batteries as needed and provides power protection to the connected
devices.
>100%
76±100%
51±75%
26±50%
0±25%
When all of the load level LEDs and the Overload LED are lit, power requirements
exceed uninterruptible power supply capacity. For more information, see
“Troubleshooting guide” on page 39.
Battery mode
When the uninterruptible power supply is operating during a power outage, the
alarm beeps once every five seconds and the Battery LED is lit. When the utility
power returns, the uninterruptible power supply switches to Normal mode operation
while the battery recharges.
If battery capacity becomes low while in Battery mode, the Battery LED starts
flashing and the alarm becomes continuous. Immediately complete and save your
work to prevent data loss.
When utility power is restored after the uninterruptible power supply shuts down, the
uninterruptible power supply automatically restarts. The General alarm LED flashes
until the battery is recharged to an acceptable level.
Bypass mode
If the uninterruptible power supply reaches an overload condition or has an internal
failure, the uninterruptible power supply transfers the connected devices to utility
power. In this case, Battery mode is not available; however, the utility power
continues to be passively filtered by the uninterruptible power supply. The alarm
sounds and the Power-on LED turns red.
The uninterruptible power supply switches to Bypass mode when any of the
following situations occur:
v The uninterruptible power supply has an overtemperature condition.
v The uninterruptible power supply has an overload condition of 103% to 110% for
30 seconds.
v The uninterruptible power supply detects a fault in the battery or uninterruptible
power supply electronics.
Standby mode
When the uninterruptible power supply is turned off and remains connected to a
power outlet, the uninterruptible power supply is in Standby mode. The Power-on
Chapter 3. Uninterruptible power supply controls, LEDs, operating modes, and power 19
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