Vertiv Liebert EXS - Fault State

Item Description
4 Static switch
5 Rectifier input
6 Rectifier input breaker (RIB)
7 Rectifier
8 Battery charger
9 Battery
10 Inverter
11 Automatic inverter switch
12 Maintenance isolation breaker (MIB)
13 UPSoutput
2.6.7 Fault state
When the UPS is in normal mode and the inverter fails or UPS over temperature occurs, operation transfers to bypass mode.
When the UPS is in battery mode (with no bypass utility), and the inverter fails or over temperature occurs, the UPS shuts
down and stops output power. During a fault state, the front panel display alarm indicator (red)is On, the buzzer beeps
continuously, and fault information displays on the LCD screen.
16 Proprietary and Confidential ©2023 Vertiv Group Corp. 2 Product Description
Vertiv™ Liebert® EXS Installer/User Guide