Liebert 300 series Installation, Operaton & Maintenance Manual page 48

Step 3. Turn Rotary Switch to Position 1. The
following conditions exist:
a. Input power flows through Maintenance
Bypass Line to critical load. This is a
hard-wired line through the UPS; input
power is not conditioned or backed up.
b . The Input and Output LEDs on the
Power Status Diagram are illuminated.
Meters and all other indicators are
inoperative. m is a maintenance
position.)
Start-Up fkom Position 1
4. Turn Rotary Switch to Position 2. The
Step
following message will appear:
Press 48 button
to start system.
Press a tocheck
configuration.
Press Alarm Silence Pad as prompted. The
control system begins executing internal
tests. Meters and indicators are operative.
Observe the following:
a. Advisory Display "Pause" LED
b. Input power to critical load continues to
be supplied through Maintenance
Bypass Line as indicated by illuminated
"Input" and "Output" LEDs on the
Power Status Diagram.
c. The screen displays the following self
test messages. The XX in each screen
indicates the seconds remaining in the
test.
STARTUP
Checking Input
p o w e r
STARTUP
Testing
STARTUP
Testing inverter
5. After the UPS has successfully passed
Step
the three previous tests, the following
message will appear:
STARTUP
Test passed. Turn
rotary switch to
position 3
Advance the Rotary Switch to Position 3, as
prompted. The battery is connected to the
UPS Module, and the control system
conducts internal tests on the battery
(unless the battery test is disabled). The
screen wilI display the following messages.
The XX in each screen indicates the seconds
remaining in the test.
charger