Replacement Information; Replacement Procedures; Replacing A Rectifier Module; Replacing The Ncu Controller - Vertiv NetSure 7100 User Manual

Vertiv™ NetSure™ 7100 -48 VDC Power System User Manual
30 amps. If one or more rectifiers are removed or fail 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 120 amps (30 amps times
four 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 37.5 amps for a total of 150 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 NCU Controller Instructions (UM1M830BNA) for a procedure.
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 NCU Controller Instructions (UM1M830BNA) for a procedure.
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 NCU Controller Instructions (UM1M830BNA) for a procedure to clear the alarm.

5.6 Replacement Information

Replacement Assemblies
When a trouble symptom is localized to a faulty rectifier module, 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
module, controller, or circuit card.
Refer to SAG582127000 (System Application Guide) for replacement part numbers.

5.7 Replacement Procedures

5.7.1 Replacing a Rectifier Module

Refer to the Rectifier Instructions (UM1R483500e3) for a rectifier module replacement procedure. Refer also to "System
Troubleshooting Information" on page 9.
NOTE!
The rectifier module being replaced is assigned by the controller the lowest available identification number. If
desired, you can change the identification number. Refer to the NCU Instructions (UM1M830BNA) for a procedure.

5.7.2 Replacing the NCU Controller

Refer to the NCU Controller Instructions (UM1M830BNA) for a controller replacement procedure.

5.7.3 Replacing a Distribution Device

General
Replace distribution devices with the same type and rating. Refer to System Application Guide SAG582127000 for part numbers.
Distribution Fuse "Alarm Fuse" Replacement
If a distribution fuse opens, the associated alarm fuse opens. Replace the distribution fuse before replacing the alarm fuse.
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