Battery Power

If the utility power fails, the UPS can provide power to the connected equipment from its internal batteries for a finite period. The UPS sounds an alarm—four beeps every 30 seconds—while operat- ing on battery. The alarm stops when the UPS returns to online operation.

On	When the On Battery indicator is lit the UPS is supplying power to the connected
Battery	equipment from its batteries.

Battery Charge

Over-

load

Replace Battery

The five-LED display on the right of the front panel shows the present charge of the UPS battery as a percentage of the battery capacity. When all five LEDs are lit, the battery is fully charged. The LEDs extinguish, from top to bottom, as the battery capacity diminishes. Refer to the figure at left for the battery capacity threshold (values are not listed on the UPS).

As a low battery warning, any LEDs illuminated (for the given capacity) flash and the UPS beeps continuously. The low battery warning default setting can be changed in terminal mode or through the optional PowerChute software. Refer to User Configurable Items, below. To see the runtime in minutes for your UPS model refer to the Runtime Table at the APC website.

The UPS emits a sustained alarm tone and this LED illuminates when an overload condition occurs (that is, when the connected equipment exceeds the specified “maximum load” as defined in the specifications at the APC web site).

The UPS may transfer to Bypass mode during an overload event. If this occurs,

the UPS can then be returned to online mode by pressing the button. Dis- connect nonessential equipment from the UPS to eliminate an overload.

Failure of a battery self-test causes the UPS to emit short beeps for one minute and the Replace Battery LED illuminates. The UPS repeats the alarm every five hours. The LED flashing indicates the battery is disconnected. The UPS repeats the alarm every five hours. Check that the battery pack is connected properly. If it is, perform the self-test procedure after the battery has charged for 24 hours to confirm the need to replace the battery. The alarm stops if the battery passes the self-test.

SHUTDOWN MODE

In shutdown mode, the UPS stops supplying power to the connected equipment, waiting for the re- turn of utility power. If there is no utility power present, external devices (such as servers) connected via the computer interface port or the accessory slot can command the UPS to shut down. This nor- mally is done to preserve battery capacity after the shutdown of protected servers. The UPS scrolls the front panel indicators sequentially in shutdown mode.

990-1060B 12/2005