User Manual

3.4 Transferring from Normal to Bypass Mode
Press and hold the power button for 2 seconds.
• If the bypass power is within normal operating range, the option to continue to Bypass mode or
turn-off the UPS displays:
a. Use the arrow buttons to select To the Bypass, and press Enter.
b. Use the arrow buttons to select No or Yes, then press Enter to confirm.
• If the bypass power is outside normal operating range, do not transfer to Bypass mode.
3.5 Transferring from Bypass to Normal Mode
Press and hold the power button for 2 seconds.
• If the UPS is operating normally, without faults, the option to continue to turn-on or turn-off the
UPS displays:
a. Use the arrow buttons to select Turn on UPS, and press Enter.
b. Use the arrow buttons to select No or Yes, then press Enter to confirm.
NOTE: The UPS automatically switches back to normal mode after an "overheated" or "overloaded"
fault is cleared and normal power is restored.
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 Normal to Bypass Mode above. Then, if power to the load
is not needed, open the main-input circuit breaker.
3.7 Remote Emergency Power-off (REPO)
REPO turns off the UPS in emergency conditions such as fire or flood. When an emergency occurs, the
REPO switch turns off the rectifier and inverter and stops powering the load immediately. The battery
stops charging and discharging.
To manually power-off 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 MCB.
3.8 Auto and Manually Restarting
During an input-power failure, the UPS draws power from the battery to supply the load until depleted,
then the UPS shuts down. The UPS automatically restarts and recovers output power to the load when:
• Mains/Utility power is restored
• The UPS Auto Restart function is enabled.
Vertiv | Liebert® GXT5™ Installer/User Guide
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