Operation
4.0OPERATION
This section describes checks to be made before starting the UPS, how to start the UPS, manual battery test, manual bypass, shutting down the UPS and disconnecting the utility power from the UPS.
NOTE
The Liebert® GXT3™’s battery has been fully charged before delivery, but some charge will be lost during storage and shipping. To ensure that the battery has adequate reserve power to protect the connected load, charge the battery for three hours before putting the UPS into service.
4.1Startup Checklist for the Liebert GXT3
Before starting the UPS, perform these checks:
___ 1. Check that the input plugs and loads are connected properly and reliably.
___ 2. Check that all of the battery cables are connected properly.
___ 3. Check that the communication cables are connected properly.
4.2Starting the UPS
1.Turn On the input circuit
2.Turn On the UPS by pressing the On/Alarm Silence/Manual Battery Test button for three seconds.
After the button is pressed, the LEDs on the display will signal that the unit has initiated the startup process.
3.Once the inverter LED has been illuminated, turn On the connected loads.
4.Check the status indicators to determine whether the Liebert GXT3 is operating normally.
5.Check the load level indicators to verify that the connected load does not exceed the UPS’ rated capacity.
The UPS is now providing conditioned power to the load.
4.3Manual Battery Test
To initiate a manual battery test, press the On/Alarm Silence/Manual Battery Test button for at least half a second while operating from utility power with no alarm conditions present.
•If only first two of the five LED segments illuminate, allow the UPS to recharge the batteries for 24 hours.
•Retest the batteries after 24 hours of charging the batteries.
•After the batteries have been retested, if only two of the five Battery LEDs illuminate, contact your local Emerson representative or Emerson Channel Support.
•If none of the five Battery LEDs illuminate during a manual battery test, check the battery con- nection and allow the UPS to recharge the batteries for 1 hour and initiate a manual battery test again.
•If none of the five Battery LEDs illuminate during the manual battery test a second time, replace the batteries, and contact your local Emerson representative or Emerson Channel Support.
4.4Manual Bypass
Press the Standby/Manual Bypass button once while the UPS is in utility (AC) mode and hold it for about 2 seconds. The UPS will transfer the connected loads to the internal bypass. If the internal bypass is not available due to utility power problems, pressing this button once will be ignored. Bypass operation is indicated by an audible alarm and illuminated amber Bypass indicator. If other indicators are illuminated, refer to 7.0 - Troubleshooting.
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