6.5 Replacing the UPS from the Power Distribution Box
Use the following procedures to replace the UPS from power distribution box.
WARNING! Risk of electric shock. Can cause injury or death. Disconnect all local and remote electric power
supplies before working with the UPS. Ensure that the unit is shut down and power has been disconnected
before beginning any maintenance.
1. Transfer the connected equipment to bypass mode.
NOTE: The programmable output receptacles are powered-off when transferred to Bypass mode.
a. Loosen the upper captive screw over the MBB, see Figure 6.2 on the next page.
b. Lift the MBB cover up, and tighten the lower captive screw. The programmable output receptacles are now
powered-off.
2. Confirm that the UPS is operating in bypass mode. If not, then manually transfer the connected equipment to
bypass as follows:
a. Press and hold the Power button for 2 seconds..
b. Select Turn to bypass and press Enter.
NOTE: The load is unprotected from disturbances in the power supply while the UPS is on bypass.
3. Turn the MBB On.
4. Wait 1 minute if the UPS is working on battery mode, then confirm that the UPS is turned-off.
5. Turn the output and input breakers Off. On 8 kVA and 10 kVA models, also turn off the bypass breaker.
6. Loosen the remaining captive screws until the power distribution boxes releases the UPS.
7. Remove the UPS from power distribution boxes and set it aside.
8. On the rear panel of the new UPS, remove the new power distribution box from the UPS.
9. Mount and connect the new UPS to the old power distribution box and secure with the previously removed
screws.
10. Turn ON the input breaker on the rear of the UPS and leave the output breakers OFF. The UPS will begin to
startup.
11. Confirm that the UPS is operating in bypass mode. If not, then manually transfer the connected equipment to
bypass as follows:
a. Press and hold the Power button for two seconds.
b. Select Turn to bypass and press Enter.
12. Turn on the output breakers.
13. Power on the UPS by pressing and holding the Power button on the operation and display panel until the
confirmation dialog appears. Use the Up/Down arrows to select YES, then press Enter.
14. Turn OFF the maintenance bypass breaker and replace the upper connector cover screw.
15. Use the Power button to switch the output to the UPS inverter.
NOTE: The captive screws and MBB cover is similar for all 5 to 10 kVA models. Figure 6.2 on the next page shows an
example on the 5 kVA model.
NOTE: Secure only one captive screw on the MBB cover; do not attempt to force the second screw.
6 Maintenance Proprietary and Confidential ©2024 Vertiv Group Corp. 81
Vertiv™ Liebert® GXT5 UPS Installer/User Guide
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