Shutdown-1+N Ups: Ups Shutdown; Shutdown-1+N Ups: System Shutdown - Emerson Liebert NXL 250 kVA Operation And Maintenance Manual

2.15.15 Shutdown—1+N UPS: UPS Shutdown
This section lists typical step-by-step instructions. The touchscreen will list all steps required for the
process, based on the unit's condition and other factors.
Perform a Module Shutdown Procedure to remove power from a single UPS module in the system.
Read all warnings in 4.0 - Maintenance before performing any maintenance on your Liebert NXL
UPS. These warnings and cautions must be observed during any work on the UPS.
NOTE
This shutdown turns Off the inverter and the rectifier and trips all DC source breakers.
Transfers to bypass if available
Use the module Monitor/Mimic Display to determine the operating condition of the UPS module.
1. Press "Shutdown" then "This Module" menu buttons (see Figure 38). The Shutdown screen will
appear in the multipurpose window (see Figure 45).
2. Press the "UPS" button to transfer the load to Bypass Static Switch Bypass and shut down the
UPS.
2.15.16 Shutdown—1+N UPS: System Shutdown
This section lists typical step-by-step instructions. The touchscreen will list all steps required for the
process, based on the unit's condition and other factors.
Perform a Module Shutdown Procedure when you want to remove power from a single UPS module in
the system.
Read all warnings in 4.0 - Maintenance before performing any maintenance on your Liebert NXL
UPS. These warnings and cautions must be observed during any work on the UPS.
NOTE
This shutdown turns Off the inverter and the rectifier and trips all DC source breakers. This
will shut down the UPS completely.
1. Press the "Shutdown" then "This Module" menu buttons (see Figure 38). The Shutdown screen
will appear in the multipurpose window (see Figure 45).
2. Press the "System" button to shut down the UPS including the Bypass Static Switch.
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Liebert NXL 48
Operation