Vertiv Liebert GXT4 Series User Manual (English)

Questions and Answers:

J
Joe FieldsJul 27, 2025
Why does my Vertiv UPS have reduced battery backup time?
- K
  Katherine RichardsJul 28, 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.
B
Brenda FernandezAug 3, 2025
Why is the battery indicator illuminated on my Vertiv Liebert GXT4 UPS?
- D
  Dr. Garrett Reed MDAug 3, 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.
J
Jeremy KellyAug 8, 2025
How to fix a Vertiv UPS that fails to start?
- E
  Eric DrakeAug 8, 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.
S
Sheri KelleyAug 14, 2025
What to do if the battery indicator is flashing on my Vertiv UPS?
- G
  gdiazAug 14, 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.
S
Samantha Williams DDSAug 21, 2025
Why is the bypass indicator flashing on my Vertiv Liebert GXT4 UPS?
- J
  Jeffery EllisAug 21, 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.

Vertiv Liebert GXT4 Series Specifications

General

Model	Liebert GXT4 Series
Type	Online Double Conversion
Output Waveform	Sine Wave
Frequency	50/60 Hz
Battery Type	Sealed Lead-Acid (VRLA)
Dimensions	Varies by model
Weight	Varies by model
Capacity	1kVA to 10kVA
Runtime	Varies by model and load
Form Factor	Tower/Rackmount
Communication Ports	USB, RS-232, SNMP
Operating Temperature	0°C to 40°C (32°F to 104°F)
Humidity	0-95% non-condensing
Power Range	1kVA to 10kVA

Summary

1 IMPORTANT SAFETY PRECAUTIONS

UPS Safety Notes

General safety guidelines and warnings for the UPS unit.

Installation Environment

Specifies the recommended environment for installing the Liebert GXT4 UPS.

Battery Safety

Critical safety warnings and precautions when handling UPS batteries.

Electromagnetic Compatibility

Compliance with FCC rules and EMC Directive for digital devices.

Environmental Protection and Disposal

Guidelines for UPS servicing and disposal of old appliances according to WEEE.

Glossary of Symbols

Explanation of symbols used in the manual.

2 GXT4 DESCRIPTION

2.1 Features

Lists key features and capabilities of the Liebert GXT4 UPS.

2.2 Available Models

Details the different models of the GXT4 UPS and their power ratings.

2.3 Front Panel and Controls

Describes the front panel layout and controls of the GXT4 UPS.

2.4 Rear Panel Features

Identifies and explains the features located on the rear panel of the GXT4 UPS.

2.5 Major Components

Explains the main internal components like TVSS, inverter, batteries, etc.

2.6 Operating Modes

Overview of different operating modes like Mains, Battery, ECO, etc.

3 INSTALLATION

3.1 What's Included

Lists the items included in the UPS package.

3.2 Unpacking and Inspection

Steps for unpacking and inspecting the UPS for damage or missing parts.

3.3 Preparation for Installation

Steps to prepare for the installation of the UPS, including environment and clearances.

3.4 Installing the UPS

General instructions for installing the UPS unit in tower or rack configurations.

4 OPERATION AND DISPLAY PANEL

4.1 LED Indicators

Explains the function and color of each LED indicator on the display panel.

4.2 Control Buttons

Describes the function of each control button on the operation panel.

4.3 LCD Panel Functionality

Details the LCD panel's role in displaying status and navigating menus.

4.4 Menu Structure Overview

Illustrates the hierarchical menu structure of the UPS LCD display and its options.

4.5 System Prompt List

Lists and explains system prompts that alert users to conditions or require confirmation.

4.6 Warning List

Lists and explains various warning messages the UPS may display.

4.7 Fault List

Lists and explains fault messages indicating UPS malfunctions.

5 OPERATION

5.1 Startup Checklist

Pre-operation checks to ensure the UPS is ready for use.

5.2 Starting the UPS

Step-by-step instructions for powering on the GXT4 UPS.

5.3 Manual Battery Test

Guide on how to initiate and interpret a manual battery test.

5.4 Manual Bypass Operation

Instructions for manually transferring the load to the bypass path.

5.5 Shutting Down the UPS

Procedures for safely shutting down the UPS unit.

5.6 Disconnecting Input Power

Steps to disconnect the UPS from the main power source.

6 COMMUNICATION

6.1 IntelliSlot Communication Cards

Information on optional communication cards for the UPS.

6.2 USB Port Communication

How to use the USB port for communication and configuration with a computer.

6.3 Terminal Block Communication

Explains the terminal block for communication and shutdown signals.

7 MAINTENANCE

7.1 Replacing Internal Battery Pack

Step-by-step guide for safely replacing the internal battery pack.

7.2 Charging Batteries

Information on how and when the UPS charges its batteries.

7.3 General Maintenance Precautions

General safety precautions to observe during UPS maintenance and operation.

7.4 Checking UPS Status

Recommendations for periodically checking the UPS operational status.

7.5 Checking UPS Functions

Procedures for checking the functional performance of the UPS.

8 TROUBLESHOOTING

8.1 Troubleshooting Symptoms

Identifies common symptoms indicating a UPS malfunction.

8.2 UPS Issue Resolution

Provides a guide to diagnose and resolve common UPS operational problems.

9 SPECIFICATIONS

Model and Cabinet Specifications

Details technical specifications for GXT4 UPS models and battery cabinets.

Operating Temperature and Battery Run Times

Covers temperature effects on performance and estimated battery run times.

9.1 Auto-Learning Battery Run Times

Explains how the UPS learns and estimates battery run times for accuracy.

APPENDICES

Appendix A: Technical Support

Contact information and support channels for technical assistance.

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Vertiv Liebert GXT4 Series User Manual

Table of Contents

Questions and Answers:

Vertiv Liebert GXT4 Series Specifications

Summary

1 IMPORTANT SAFETY PRECAUTIONS

UPS Safety Notes

Installation Environment

Battery Safety

Electromagnetic Compatibility

Environmental Protection and Disposal

Glossary of Symbols

2 GXT4 DESCRIPTION

2.1 Features

2.2 Available Models

2.3 Front Panel and Controls

2.4 Rear Panel Features

2.5 Major Components

2.6 Operating Modes

3 INSTALLATION

3.1 What's Included

3.2 Unpacking and Inspection

3.3 Preparation for Installation

3.4 Installing the UPS

4 OPERATION AND DISPLAY PANEL

4.1 LED Indicators

4.2 Control Buttons

4.3 LCD Panel Functionality

4.4 Menu Structure Overview

4.5 System Prompt List

4.6 Warning List

4.7 Fault List

5 OPERATION

5.1 Startup Checklist

5.2 Starting the UPS

5.3 Manual Battery Test

5.4 Manual Bypass Operation

5.5 Shutting Down the UPS

5.6 Disconnecting Input Power

6 COMMUNICATION

6.1 IntelliSlot Communication Cards

6.2 USB Port Communication

6.3 Terminal Block Communication

7 MAINTENANCE

7.1 Replacing Internal Battery Pack

7.2 Charging Batteries

7.3 General Maintenance Precautions

7.4 Checking UPS Status

7.5 Checking UPS Functions

8 TROUBLESHOOTING

8.1 Troubleshooting Symptoms

8.2 UPS Issue Resolution

9 SPECIFICATIONS

Model and Cabinet Specifications

Operating Temperature and Battery Run Times

9.1 Auto-Learning Battery Run Times

APPENDICES

Appendix A: Technical Support

Related product manuals