Troubleshooting And Repair; Important Safety Instructions; Contact Information; Controller And Rectifiers - Vertiv NetSure 7100 User Manual

5 Troubleshooting and Repair

5.1 Important Safety Instructions

DANGER! Adhere to the "Important Safety Instructions" starting on page v.

5.2 Contact Information

Refer to Section 4154 (provided with your customer documentation) for support contact information.

5.3 Controller and Rectifiers

For troubleshooting and repair instructions on these units, refer to the following documents.
•
NCU Controller Instructions (UM1M830BNA)
•
Rectifier Instructions (UM1R483500e3)

5.4 Controller Configuration

If any controller configuration settings were changed, refer to the NCU Controller 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.

5.5 System Troubleshooting Information

This system is designed for ease in troubleshooting and repair. The various indicators as described in "Local Controls and Indicators"
on page 3 and in the controller and rectifier instructions are designed to isolate failure to a specific element. Once the faulty element
has been identified, refer to "Replacement Information" on page 10 and "Replacement Procedures" on page 10.
Troubleshooting Alarm Conditions on the Controller
The controller displays alarm conditions as listed in the "Resolving Alarms" section of the controller's User Manual. Programmable
external alarm relays are also available. Refer to the System Installation Instructions (IM582127000900) and the configuration
drawing (C-drawing) supplied with your power system documentation for your alarm relay configurations.
Active Alarm
The controller's
Instructions (UM1M830BNA) to access these menus.
Checking the Controller's Current Limit Point after Adding or Removing a Rectifier Module
If a rectifier is added; the respective current limit point in amps will automatically increase to maintain the same percentage. For
example, if the current limit was set to 100% of combined capacity and a rectifier is added, the new current limit set point will be 100%
of the combined capacity including the new rectifier.
If a rectifier module is removed from the system (and the Rect Comm Fail alarm is cleared), the current limit point will remain
unchanged unless the capacity of the remaining rectifiers 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).
It is recommended that the current limit point be checked whenever a rectifier module is added to or removed from the power system.
When setting total rectifier current limit, the set point to each rectifier is the total set point divided by the number of rectifiers. For
example, if the system contains five rectifiers and the current limit is set to 150 amps then each rectifier has a current limit set point of
Alarm History
and submenus allow the User to view alarm details. Refer to the NCU Controller
Vertiv™ NetSure™ 7100 -48 VDC Power System User Manual
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