Chapter 3: Operating The Ups; 3� 1 � Silencing The Audible Alarm; 3�2� Starting-Up The Ups - Vertiv Liebert GXT5 Series Installer/User Manual

Chapter 3: Operating the UPS

WARNING! Risk of electric shock
Can cause injury or death. Hazardous mains and/or battery voltage exists behind the protective cover No user
accessible parts are located behind the protective covers that require a tool for removal. Only qualified service
personnel are authorized to remove such covers. If maintenance for rack is needed, notice that the neutral line
is live�
3.1. Silencing the Audible Alarm
The audible alarm may sound during UPS operation� To silence the alarm, press and hold the ESC button for 2
seconds� The button is located on the front-panel display, see
3.2. Starting-up the UPS
IMPORTANT! Do not start the UPS until after the installation is finished, the system is commissioned by an
authorized engineer, and the external input circuit breakers are closed.
CAUTION
Starting the UPS applies mains/utility power to the output terminals. Make sure that the load power is safe and
ready to accept power. If the load is not ready, isolate the load with the output terminal.
The UPS starts in Normal Mode�
To start the UPS:
1� If included on your UPS model, make sure the maintenance-bypass switch is in the open "OFF" position and
that the guard is secured in place�
2� Ensure that the REPO connector on the rear of the unit has a jumper between pins 7-8 or that it is properly
wired to an Emergency Power- Off circuit (normally closed)�
3� Make sure the breaker supplying power to the UPS is closed, and if necessary press the input circuit breaker
reset buttons at the rear of the UPS�
4� If included on your UPS model, close the bypass breaker on the rear of the UPS�
5� Close all output breakers on the rear of the UPS (or in an external panel board, if used)�
6� 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�
7� If this is the first-time start-up of the UPS, the Start-up Guidance wizard opens to set the basic parameters of
the UPS� Follow the prompts�
For detailed description of UPS display functions and settings, see
Vertiv | Liebert® GXT5™ | Installer/User Guide
Operation and Display Panel
Operation and Display Panel
on page 29�
on page 29�
21