5 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.
NOTE: The 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.
5.1 Startup Checklist for the GXT4
Before starting the UPS, perform these checks:
1. Check that the unit was wired by a qualified electrician 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.
5.2 Starting the UPS
1. Verify that the unit is wired by a qualified electrician and the circuit breaker in the feeder panel
is closed.
2. Close the input breaker on the rear of the unit.
3. The UPS will begin the startup sequence once AC power is present.
NOTE: The UPS will sound an audible alarm, this is normal.
4. On the LCD, press either the Up or Down button once, then press the Enter button to turn On
the UPS.
T h e UPS will sou n d th e au d ib le alarm a g ain as th e ou tp u t recep tacles are n ow bein g p owered
b y th e in tern al b yp ass, th en will sou n d on e m ore tim e as th e in verter powers th e con n ec ted
eq u ip m en t.
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.
5.3 Performing a Manual Battery Test
To initiate a manual battery test, select MAIN M EN U > C O N T R O L > BA T T T EST > S T A R T .
• If the battery test results show FA IL ED, 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
Vertiv™ representative or Technical Support.
Vertiv | Liebert GXT4 Installer/User Guide | 41
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