990-1137, 3/02 6
Battery
Charge
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.
Over-
load
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).
During an overload, the UPS may transfer to Bypass mode; after an overload
situation is resolved, the UPS will transfer back to online mode. Disconnect non-
essential equipment from the UPS to eliminate an overload.
Replace
Battery
Failure of a battery self-test causes the UPS to emit short beeps for one minute
and the Replace Battery LED illuminates. The LED flashing indicates the battery
is disconnected. The UPS repeats the alarm every five hours. Check that the bat-
tery 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.
REAR PANEL Computer Interface Port
External Battery Connector Port
Outlets
Input Plug
Fan
TVSS Ground