APC 650 - Manual (Page 13)

9
English
power to the load, waiting for the return of utility power. The UPS scrolls the front panel LED indi-
cators sequentially in shutdown mode.
6. Alarms
6.1 On Battery
In on-battery operation, the on-battery LED illuminates and the UPS sounds an audible alarm con-
sisting of one initial beep and four beeps every 30 seconds. The alarm stops when the UPS returns
to on-line operation.
6.2 Overload
When the UPS is overloaded (i. e., when the connected loads exceed maximum listed in section
12) the overload LED illuminates and the UPS emits a sustained tone. The alarm remains on until
the overload is removed. Disconnect nonessential load equipment from the UPS to eliminate the
overload.
6.3 Replace Battery
The UPS emits short beeps for one minute and the replace battery LED illuminates if the battery
fails the self-test. The UPS repeats the alarm every five hours. After one week the alarm becomes
continuous. Perform the self-test procedure in section 5.2 to confirm the replace battery condition.
The alarm stops when the battery passes the self-test.
6.4 Low Battery
On-battery, when the energy reserve of the battery runs low, the UPS beeps continuously until the
UPS shuts down from battery exhaustion or returns to on-line operation.
7. Options
7.1 Interface kits
For computer systems that have built-in UPS monitoring features, a series of interface kits are
available to connect the UPS to your system. Each kit includes the appropriate interface cable to
convert the UPS’s status signals into signals your system recognizes (use only factory supplied or
authorized UPS monitoring cables). See your dealer or call the number at the front of this manual
for more information.