Fault State - Vertiv Liebert EXS Installer/User Manual

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1.5.6 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.
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Description
Automatic inverter switch
Output breaker
UPS output
Vertiv | Liebert® EXS™ Installer/User Guide