Liebert 300 series Installation, Operaton & Maintenance Manual page 44

If the DC bus voltage decreases to the setpoint
before the test is complete, the battery has
failed the test and the UPS performs the
following steps:
Transfer load to bypass
1.
2. Restart the charger
Sound the audible alarm horn
4. Display a battery warning message (note
that the only way to clear this warning
message is to perform a UPS start-up)
5. Record a battery test failed message
6. Disable future battery tests
Retransfer load to the UPS.
To schedule and enable this test, and to view or
change the setpoint, push the Alarm Silence pad
when the following screen appears:
Auto Battery
Test Parameters:
P r e s s 48 toview
or set.
MON APR 15 17:30
THRESHOLD: 360 vdc
INTERVAL: 5 WEEKS
TEST ENABLED
This screen displays test parameters and the
date and time of the next scheduled test. During
initial start-up, select preferred test day, date,
time, threshold voltage setpoint, test interval,
and enable or disable the automatic tests. Test
interval is 2 to 9 weeks (factory set at 5). Use
the Up, Down, and Alarm Silence pads to enter
parameters. Note that if a scheduled test cannot.
be performed because the load is not on the
UPS, the test will automatically be scheduled
for 1 week later.
Auto Restart. The UPS can restart the load
after an extended power failure forces a load
shutdown. As shipped from the factory, this
feature disabled. To enable the feature, locate
is
the Auto Restart Status screen:
Auto Restart:
DISABLED
This setting can be either ENABLED or
DISABLED. Use the UP. DOWN. and ALARM
SILENCE buttons to change the ialue to
ENABLED.
When power is reapplied after an automatic
load shutdown, the UPS will restart the load 10
seconds after the power returns. While the UPS
is restarting the load, it will execute self tests to
verify that the major internal power and control
sections are operating properly before
transferring the load to the inverter. If any
problems occur during this selftest, the UPS
will abort the tests and disable the load. The
load can be powered manually by turning the
power rotary switch to position 1, and a
problem.
300 units which include optional battery
circuit bred%tirs, the unit will restart the
load as described. However, to reconnect
the battery, the battery circuit breaker(s)
must be manually reset and closed.