Vertiv | Liebert® GXT5™ | Installer/User Guide 51
3.6. Shutting-down the UPS Completely
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.
Transfer to Bypass mode, see Transferring from Bypass to Normal Mode on page 50. Then, if power to
the load is not needed, open the MCB.
For systems with direct power distribution, isolate the UPS from AC power by disconnecting the external
input MCB. If the main and bypass are independently powered, close the two input MCBs.
3.7. Remote Emergency Power-o (REPO)
REPO turns o the UPS in emergency conditions such as re or ood. When an emergency occurs, the
REPO switch turns o the rectier and inverter and stops powering the load immediately. The battery stops
charging and discharging.
To manually power-o in an emergency, disconnect the terminal connecting the REPO port on the rear of the
UPS.
If mains/utility power is present, the UPS control circuit remains active even though output power is disabled.
To remove all mains/utility power, disconnect the external main-input circuit breaker.
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