Vertiv
|
NetSure™ 5100 Series -48 VDC Power System User Manual (UM582137200)
|
Rev. G
18
TROUBLESHOOTING AND REPAIR
Contact Information
Refer to Section 4154 (provided with your customer documentation) for support contact information.
Controller and Rectifier
For troubleshooting and repair instructions on these units, refer to the following documents.
•
NCU Controller Instructions (UM1M830BNA)
•
Rectifier Instructions (UM1R482000e3)
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.
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 11 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
19 and “Replacement Procedures” on page 19.
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
(IM582137200) and the Controller 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 Controller Instructions (UM1M830BNA) to access these menus.
Checking the Controller’s Current Limit Point after Adding or Removing a Rectifier
If a rectifier module 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
module is added, the new current limit setpoint will be 100% of the combined capacity including the new
rectifier module.
If a rectifier module is removed from the system (and the Rect Comm Fail is cleared), the current limit point will
remain unchanged unless the capacity of the remaining rectifiers is not sufficient to maintain this current limit
point. If that happens, the current limit point will automatically decrease to the maximum (121% of the
remaining rectifiers).
It is recommended that the current limit point be checked whenever a rectifier is added to or removed from the
power system.