Vertiv Liebert GXT4-1500RT120 User Manual (English)

Questions and Answers:

L
Lauren RaymondAug 9, 2025
Why does my Vertiv Liebert GXT4-1500RT120 UPS have reduced battery backup time?
- M
  Michael BoltonAug 9, 2025
  The Vertiv UPS might have reduced battery backup time because the batteries are not fully charged. To resolve this, keep the UPS plugged in continuously for at least 24 hours to recharge the batteries. Alternatively, the UPS could be overloaded, so check the load level indicator and reduce the load. Lastly, the batteries may not be able to hold a full charge due to age, in which case you should replace them.
M
michaellynchAug 15, 2025
Why is the battery indicator illuminated on my Vertiv UPS?
- N
  nsmithAug 15, 2025
  The battery indicator illuminates when the Vertiv UPS is operating from battery mode. This can occur if the UPS is not securely plugged into the wall receptacle, so ensure it is properly connected. It can also happen if the UPS input protection fuse has blown or opened, in which case you should save data, close applications, replace the UPS input fuse, and then restart the UPS. Finally, the mains power may be out of tolerance, so you should ensure the mains supply voltage is within acceptable limits for the UPS, and save data and close applications.
K
kimberlysilvaAug 20, 2025
How to fix a Vertiv Liebert GXT4-1500RT120 that fails to start?
- C
  Charles LeachAug 21, 2025
  The Vertiv UPS might fail to start because it is short-circuited or overloaded. Ensure the UPS is off, disconnect all loads, and make sure nothing is lodged in the output receptacles. Also, verify that the loads are not defective or shorted internally. Another reason could be that the batteries are not charged enough or not connected. Check to ensure the internal battery is connected; if not, make the connection and try to start the unit. If the battery is connected, leave the UPS connected to input power for 24 hours to recharge the batteries, then try to start the unit.
J
James HopkinsAug 27, 2025
What to do if the battery indicator is flashing on my Vertiv Liebert GXT4-1500RT120?
- M
  Michelle JacksonAug 27, 2025
  The flashing battery indicator on your Vertiv UPS indicates that the battery source is not available, which is accompanied by a continuous horn. Check the battery connections, completely power down, and then restart the UPS. If the battery circuit opens while the UPS is running, it will be detected during the next battery test.
B
Belinda ColeSep 1, 2025
Why is the bypass indicator flashing on my Vertiv Liebert GXT4-1500RT120 UPS?
- S
  Steven DavisSep 1, 2025
  The bypass indicator flashes on the Vertiv UPS because the voltage or frequency is outside acceptable limits, disabling the bypass. The AC input powers the PFC input and serves as the bypass source. If the AC is present but the voltage or frequency exceeds the acceptable range for safe operation with a load, the bypass will be disabled, and this indicator will flash, indicating that the bypass is unavailable.