Vertiv Liebert EXL S1, Operation And Maintenance Manual

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2.2.4 UPS Shutdown—Single-Module System
Follow these instruction to completely shut down and de-energize the UPS module.
NOTE: This shutdown turns Off the inverter, rectifier and bypass static switch. This will shut down the UPS
completely.
1. From the Touchscreen Control Panel, touch OPERATE > UNIT OPERATIONS > Inverter Off > Single .
2. Verify that the critical load transfers from the UPS inverter to UPS bypass.
3. Open the external Module Battery Disconnect(s) (MBD).
4. Open the external MIB, if used.
NOTE: This will remove the UPS output completely.
5. Open the external Remote Back-feed Breaker (RBB) and optional internal Back-Feed Disconnect (BFD) if
installed. The Bypass Static Switch (BPSS) will turn Off.
6. Open the external rectifier feeder breaker.
• External Remote Back-Feed Breaker (RBB) for single input/feed applications
• External Rectifier Feed Breaker (RFB) for dual input/feed applications
7. Once shutdown is complete, the Touchscreen Control Panel will turn Off.
2.3 Manual Operations—1+N Systems
2.3.1 Startup—1+N Module System
WARNING! Risk of electrical shock. Can cause equipment damage, personal injury and death. The following
procedure provides power to the critical load distribution system. Verify that the critical load distribution is
ready to accept power. Make sure that personnel and equipment are ready for the critical load distribution
system to be energized.
ADVERTISSEMENT : Risque de décharge électrique pouvant entraîner des dommages matériels, des
blessures et même la mort. La procédure suivante fournit de l’énergie au système de distribution de la
charge critique. Vérifiez que ce système est prêt à être alimenté. Assurez-vous que le personnel et les
équipements sont préparés pour la mise sous tension du système de distribution de la charge critique.
If the installation includes a Maintenance Bypass, power may already be supplied to the critical load equipment through the
Maintenance Bypass. If there is no power to the critical load, apply power through the UPS bypass line per the following
procedure.
During startup, power is supplied to the critical load through the UPS (internal) bypass line while the UPS system is being
energized. Depending on the reason for the UPS system shutdown, power may be present in the bypass line. To determine
this, check the Touchscreen Control Panel screen after control power is available.
NOTE: If the system was shut down in response to an Emergency Off, there may be alarm messages on the
touchscreen that describe system conditions before (or at the time of) the shutdown. Some or all of the alarm
conditions may have been resolved. Contact Vertiv™ Technical Support for assistance in clearing any remaining alarm
messages.
Vertiv™ | Liebert® EXL S1 Operation and Maintenance Guide
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