Item Component Operation/Function
6 Inverter
In normal operation, inverts the DC output of the PFC circuit into precise, regulated sine-wave
AC power. When utility power fails, the inverter receives DC power from the DC-to-DC
converter. In either operating mode, the UPS inverter remains on-line, generating clean,
precise, regulated AC-output power.
7 Internal Bypass
In the unlikely event of UPS failure such as overload or over temperature, automatically
transfers the connected load to bypass. To manually transfer the connected load from
inverter to bypass, see Transferring from Normal to Bypass Mode on page51.
8 Outlet group Output receptacles.
Table 2.4 Major Components (continued)
2.6.1 Maintenance Bypass
On 5 kVA to 10 kVA models, the UPS includes manual maintenance bypass in a removable section of the rear of the UPS.
Maintenance bypass keeps connected equipment powered with utility power and allows replacement of the UPS in the event
of a UPS malfunction.
NOTE: The bypass power path does not protect the connected equipment from disturbances in the utility power
supply.
Maintenance bypass procedure
5 to 10 kVA and HV and L6-30 Replacement with or without external MBC
1. Download the parameters via ParamSet (if possible) or manually record the parameters from the Setting page
2. Follow the appropriate CoHE procedure to Partially De-energize System
3. Remove the front bezels of the UPS and lay the bezels aside for reassembly.
4. Loosen and remove the screws on the battery door.
a. Lay the screws and battery door aside for reassembly
b. Grasp the battery handle, then pull out the/each battery module
5. Remove all accessories, if applicable:
a. Disconnect the EBC cables
b. Remove the card in the Vertiv™ Liebert® IntelliSlot™ port
c. Remove the control wires from the rear terminal blocks
6. Disconnect the PD5 from the back of the UPS by removing the 4-6 screws connecting the two units and pulling
them apart, separating the internal Andersons.
7. Remove the old UPS from the rack shelf or tower feet
8. Install the new UPS into the rack shelf or tower feet
9. Reconnect the PD5 to the back of the UPS by pushing them together, snapping in the internal Andersons and
installing the 4-6 screws connecting the two units.
10. Reconnect all previously installed accessories, if applicable:
a. Reconnect the EBC cables
b. Reinstall the card in the Liebert® IntelliSlot™ port.
c. Reinstall the control wires into the rear terminal blocks
11. Line up and slowly push in the each new battery module until 2/3 of the length is in the bay.
Lift up and slowly push slowly until the battery pack is fully inserted in the bay
2 Product Description Proprietary and Confidential ©2024 Vertiv Group Corp. 21
Vertiv™ Liebert® GXT5 UPS Installer/User Guide
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