Operation
37 Liebert
®
GXT4
™
User Manual
4.0 Operation
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 mains power from the UPS.
4.1 Startup Checklist for the Liebert GXT4
Before starting the UPS, perform these checks:
___ 1. Check that the input plugs and loads are connected properly and reliably.
___ 2. Check that the battery cable is connected properly.
___ 3. Check that the communication cables are connected properly.
4.2 Starting the UPS
1. Plug the UPS into the appropriate AC outlet.
2. Close the input breaker on the rear of the unit.
3. The UPS will begin the startup sequence once AC power is present.
4. On the LCD, press either the Up or Down button once, then press the Enter button to turn On the UPS.
The UPS will sound the audible alarm again as the output receptacles are now being powered by the
internal bypass, then will sound one more time as the inverter powers the connected equipment.
5. Check the LCD and LED indicators to ensure that the UPS is operating normally.
6. Check the load percentage on the default screen to ensure that the connected equipment is not
exceeding the UPS’s rated capacity.
The UPS is now providing conditioned and protected power to the connected equipment.
4.3 Manual Battery Test
To initiate a manual battery test, select MAIN MENU > CONTROL>BATT TEST>START.
• If the battery test results show FAILED, allow the UPS to recharge the batteries for 24 hours.
• Retest the batteries after 24 hours of charging.
• After the batteries have been retested, if the battery test still shows FAILED, contact your local
Emerson
®
representative or Emerson Network Power Channel Support.
NOTE
The Liebert GXT4’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 5 hours before putting the UPS into service.
NOTE
The UPS will sound an audible alarm, this is normal.
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