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Configuration Program
24
8.6 UPS Tab
When the program starts, the following window will open displaying the UPS model along with the
current UPS settings. This information can be refreshed at any time using the REFRESH button.
These illustrations show the factory default settings for 120VAC UPS at the left, and output L-N volt-
ages available to select at the right.
8.6.1 Output Voltage
The Output Voltage displayed is the nominal input/output voltage. This is not a voltmeter and will
display the nominal voltage whether the UPS is On or Off. The drop down box will show the alternate
L-N voltages available. Select the voltage that matches the nominal utility in your location.
Output Voltage Selection Notes
For the Liebert GXT2 dual inverter models, this sets the L1-N and the L2-N nominal voltage. The
L1-L2 voltage depends upon the phase angle of the input utility and is auto-detected when power is
first applied.
For the Liebert GXT2 230V single inverter model, only those voltages supported by the UPS will be
displayed.
8.6.2 L-N Reverse Detection—120V UPS Models Only
Proper wiring of the receptacle powering the UPS is critical for safety, EMI suppression, and surge
suppression. The UPS checks the outlet when first plugged in. If the Line-Neutral is reversed or the
ground is missing, the UPS will not start. If a problem is detected after the UPS is started, the UPS
will continue to operate, but the AC INPUT LED will flash. In some unique applications the user may
wish to disable this alarm. Except for special situations, improperly wired receptacles should be
immediately repaired before the UPS is put into service. Click on the box to remove the check mark
and disable this alarm.