9. Push the battery wire and internal battery pack back into the UPS.
10. Reattach the front battery door with the 6 screws.
11. Reattach the front plastic bezel cover to the UPS.
NOTE: The internal battery pack is hot-swappable. However, caution should be exercised because
during this procedure the load is unprotected from disturbances and power outages. Do not replace
the battery while the UPS is operating in Battery Mode. This will result in a loss of output power and will
drop the connected load.
7.2 Charging Batteries
The batteries are valve-regulated, non-spillable, lead acid and should be kept charged to attain their
design life. The UPS charges the batteries continuously when it is connected to the utility input power.
If the UPS will be stored for a long time, We recommend connecting the UPS to input power for at least 24
hours every 4 to 6months to ensure full recharge of the batteries.
7.3 Precautions
Although the Liebert® GXT4 is designed and manufactured to ensure personal safety, improper use can
result in electrical shock or fire. To ensure safety, observe the following precautions:
• Turn Off and unplug the GXT4 before cleaning it.
• Wear rubber gloves and boots.
• Clean the UPS with a dry cloth. Do not use liquid or aerosol cleaners.
• Never block or insert any objects into the ventilation holes or other openings of the GXT4.
• Do not place the GXT4 power cord where it might be damaged.
7.4 Checking UPS Status
We recommend checking the UPS operation status every six months.
• Check if the UPS is faulty: Is the Fault Indicator On? Is the UPS sounding an alarm?
• Check if the UPS is operating in Bypass mode: Normally, the UPS operates in Normal Mode. If it
is operating in Bypass Mode, stop and contact your local Vertiv representative or Technical
Support.
• Check if the battery is discharging: When the utility input is normal, the battery should not
discharge. If the UPS is operating in Battery Mode, stop and contact your Vertiv representative
or Technical Support.
Vertiv | Liebert® GXT4™ Installer/User Guide
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