Liebert GXTTM - Manual (Page 12)

10
SWITCHING FROM OUTPUT OFF TO UPS or UPS to BYPASS to OFF
1. If the UPS is in OUTPUT OFF condition, with all rear mounted breakers in the
ON position, and the
AC input LED and the bottom LED of the
BATTERY/LOAD array lit. To go to UPS mode, press the
UPS ON/ALARM
/BATTERY TEST button until a “Beep” is heard. The UPS will then go
through its start-up routine ending up after approximately 10 seconds with the
UPS LED lit.
2. If the UPS is operating in UPS mode and there is a need to go to BYPASS
mode, press the
OUTPUT OFF/BYPASS button until a beep is heard. The
UPS ON LED will extinguish and the BYPASS LED will be lit.
WARNING: In BYPASS mode your connected load is NOT PROTECTED
from mains disturbances.
If you are in BYPASS mode and want to set the OUTPUT to OFF. Press the
OUTPUT OFF/ BYPASS button for a least 1 second, twice, within a 4 second
time interval. There is no audible “Beep” on this action.
OPERATION IN BATTERY MODE
If in the absence of the mains power it is essential for the UPS output to be made
available for a critical operation, then the following procedure should be followed.
1. To start the UPS in BATTERY mode, press the
UPS ON/ALARM /BATTERY
TEST button for at least one half second until you hear the audible alarm
gives a double “Beep” to signal acceptance of the command. After a short
delay, the
BATTERY LED should light. The UPS will then initiate a self-test
and approximately 10 seconds after these tests are completed, the
UPS ON
LED will light. Connected load equipment may now be started.
PLEASE NOTE- duration of output power will be limited to remaining battery
capacity shown by the battery LED’s.
2. To power down the UPS. Press the OUTPUT OFF/ BYPASS button until the
audible alarm “Beeps”. The UPS will now shutdown and all LED’s extinguish.