Vertiv™ NetSure™ 2100 Series -48 VDC Power System User Manual
Proprietary and Confidential © 2022 Vertiv Group Corp.
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of 10 amps. If one or more rectifiers are removed or fails it will take several seconds for the individual set points to the remaining
rectifiers to be reset. In the example given, if one rectifier is removed the current limit set point will drop to 20 amps (10 amps times
two remaining rectifiers) until the controller can send updated set points to the remaining rectifiers.
This takes a couple communication cycles (several seconds) after which each rectifier would have a new set point of 15 amps for a
total of 30 amps. The total current limit of the rectifiers should not be set such that the loss of the redundant rectifiers will cause this
temporary set point to drop below the actual maximum expected load. If batteries are used on the rectifier output, the batteries
should support the load until the current limit set points can be re-established due to loss of a rectifier.
Refer to the mini control unit instructions (UM1M831ANA) for a procedure.
5.4.5
Clearing a Rectifier Communications Fail Alarm after Removing a Rectifier
If a rectifier module is removed from the system, a rectifier communications failure alarm is generated. If the rectifier module will not
be replaced, the alarm should be cleared.
Refer to the mini control unit instructions (UM1M831ANA) for a procedure to clear the alarm.
5.4.6
Clearing a Rectifier Lost Alarm
If the controller resets while a rectifier communications fail alarm is active, the rectifier communications fail alarm is replaced with a
rectifier lost alarm.
Refer to the mini control unit instructions (UM1M831ANA) for a procedure to clear the alarm.
5.5
Replacement Information
5.5.1
Replacement Assemblies
When a trouble symptom is localized to a faulty rectifier, controller, or system circuit card; that particular device or circuit card should
be replaced in its entirety. No attempt should be made to troubleshoot or repair individual components on any rectifier, controller, or
circuit card.
Refer to system application guide SAG582138000 for replacement part numbers.
5.6
Replacement Procedures
DANGER!
Adhere to the “Important Safety Instructions” starting on page v.
5.6.1
Replacing a Rectifier
Refer to the rectifier instructions (UM1R481000e3) for a rectifier replacement procedure. Refer also to “System Troubleshooting
Information” on page 5.
The rectifier being replaced is assigned by the mini control unit the lowest available identification number. If desired, you can change
the identification number, see “Configuring the Mini Control Unit Identification of Rectifiers” in the separate power system installation
manual (IM582138000).
5.6.2
Replacing the Mini Control Unit
Refer to the mini control unit instructions (UM1M831ANA) for a controller replacement procedure.
