Vertiv™ NetSure™ 512
NGBB
-48 VDC Power System User Manual
Proprietary and Confidential © 2022 Vertiv Group Corp.
23
4
Troubleshooting and Repair
4.1
Contact Information
Support contact information is provided at the back of this document.
4.2
Controller, Rectifiers, and Optional Converters
For troubleshooting and repair instructions on these units, refer to the following documents.
•
NCU Controller Instructions (UM1M830BNA)
•
Rectifier Instructions (UM1R482000E3)
•
-48 VDC to +24 VDC Converter Instructions (UM1C48241500)
•
-48 VDC to -58 VDC Converter Instructions (UM1C48582000P3)
4.3
Controller Configuration
If any controller configuration settings were changed, refer to the NCU Instructions (UM1M830BNA) and save a copy of the
configuration file. This file can be used to restore the controller settings, if required, at a later date.
NOTE!
Provided on a USB drive furnished with the system is a controller configuration drawing (C-drawing) and the
controller configuration files loaded into the controller as shipped.
4.4
System Troubleshooting Information
General
This system is designed for ease in troubleshooting and repair. The various indicators as described in “Local Controls and Indicators”
on page 5 and in the Controller, Rectifier, and Converter Instructions are designed to isolate failure to a specific element. Once the
faulty element has been identified, refer to “Replacement Information” on page 24 and “Replacement Procedures” on page 25.
Troubleshooting Alarm Conditions on the Controller
The controller displays alarm conditions as listed in the “Available Alarms” or “Resolving Alarms” section of the controller’s User
Manual. Programmable external alarm relays are also available. Refer to the System Installation Instructions (IM582137000) and the
configuration drawing (C-drawing) supplied with your power system documentation for your alarm relay configurations.
The controller’s
Active Alarm and Alarm History submenus allow the User to view alarm details. Refer to the NCU Instructions
(UM1M830BNA) to access these menus.
Checking the Controller’s Current Limit Point after Adding or Removing a Rectifier Module or Converter
Module
If a rectifier module or converter module is added to the power system, the system current limit point will automatically increase by
the percentage each existing rectifier or converter was set to provide prior to the addition.
If a rectifier module or converter module is removed from the system (and the Rect Comm Fail alarm is reset), the current limit point
will remain unchanged unless the capacity of the remaining rectifiers or converters is not sufficient to maintain the present current
limit point. If that happens, the current limit point will automatically increase to the maximum (121% of the remaining rectifiers or
converters).
It is recommended that the current limit point be checked whenever a rectifier module or converter module is added to or removed
from the power system.
