990-1062, Revision 1 04/01 6
Online
The online indicator illuminates when the UPS is supplying utility power to the connected equip-
ment. If the indicator is not lit, the UPS is supplying battery power and the UPS sounds an alarm—
four beeps every 30 seconds.
Utility Voltage
230V
120V
The UPS has a diagnostic feature that displays the utility voltage. Plug the UPS into the normal
utility power.
Press and hold the
button to view the utility voltage bar graph display. After a few seconds
the five-LED display on the right of the front panel shows the utility input voltage. Refer to the
figure at left for the voltage reading (values are not listed on the UPS).
The UPS starts a self-test as part of this procedure. The self-test does not affect the voltage dis-
play.
The display indicates the voltage is between the displayed value on the list and the next higher
value. For example, with three LEDs lit, the input voltage is between 114 and 124 VAC.
If no LEDs are lit and the UPS is plugged into a working AC power outlet, the line voltage is ex-
tremely low.
If all five LEDs are lit, the line voltage is extremely high and should be checked by an electrician.
AVR Trim
This LED illuminates to indicate the UPS is compensating for a high utility voltage.
AVR Boost
This LED illuminates to indicate the UPS is compensating for a low utility voltage.
B
ATTERY POWER
If the utility power fails, the UPS can provide power to the connected equipment from its internal battery for a finite period. The
UPS sounds an alarm—four beeps every 30 seconds—while operating on battery power. The alarm stops when the UPS returns
to online operation.
On Battery
When the on battery power indicator is lit the UPS is supplying battery power to the connected
equipment.
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.
The low battery warning default setting can be changed from the rear panel or through the optional
PowerChute software. Refer to Default Settings below for details.
Overload
The UPS emits a sustained alarm tone and the LED illuminates when an overload condition occurs
(that is, when the connected equipment exceeds the specified “maximum load” as defined in Speci-
fications at the APC web site, www.apc.com
). The alarm remains on until the overload is removed.
The UPS continues to supply power as long as it is on-line and the breaker does not trip; but, the
UPS will not provide power from batteries in the event of a utility voltage interruption.
Disconnect nonessential equipment from the UPS to eliminate the overload. If a continuous over-
load occurs while the UPS is on-battery, the unit turns off output in order to protect the UPS from
possible damage.
Replace Battery
Failure of a battery self-test causes the UPS to emit short beeps for one minute and the replace
battery LED illuminates. LED flashes indicate the battery is disconnected. The UPS repeats the
alarm every five hours. Perform the self-test procedure after the battery has charged for 24 hours to
confirm the replace battery condition. The alarm stops if the battery passes the self-test.
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