Vertiv™ NetSure™ 5100 Series -48 VDC Power System User Manual
Proprietary and Confidential © 2022 Vertiv Group Corp.
Clearing a Solar Converter Lost Alarm
If the controller resets while a solar converter communications fail alarm is active, the solar converter communications fail alarm is
replaced with a solar converter lost alarm.
Refer to the NCU Instructions (UM1M830BNA) for a procedure to clear the alarm.
Clearing a -48 VDC to +24 VDC Converter or -48 VDC to -58 VDC Converter Lost Alarm
If the controller resets while a -48 VDC to +24 VDC converter or -48 VDC to -58 VDC converter communications fail alarm is active,
the converter communications fail alarm is replaced with a converter lost alarm.
Refer to the NCU Instructions (UM1M830BNA) for a procedure to clear the alarm.
Clearing an Inverter Lost Alarm
If the controller resets while an inverter communications fail alarm is active, the inverter communications fail alarm is replaced with an
inverter lost alarm. Refer to the NCU Controller Instructions (UM1M830BNA) for a procedure to clear the alarm.
5.5 Replacement Information
Replacement Assemblies
When a trouble symptom is localized to a faulty rectifier module, solar converter module, -48 VDC to +24 VDC converter module,
-48 VDC to -58 VDC converter module, 120 VAC inverter 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, solar converter module, -48 VDC to +24 VDC converter module, -48 VDC to -58 VDC converter module, 120 VAC inverter
module, controller, or circuit card.
Refer to SAG582137100 (System Application Guide) for replacement part numbers.
5.6 Replacement Procedures
DANGER! Adhere to the “Important Safety Instructions” presented at the front of this document.
5.6.1 Replacing a Rectifier, Solar Converter, Optional -48 VDC to +24 VDC Converter, or
Optional -48 VDC to -58 VDC Converter and Inverter
Refer to the Rectifier Instructions (UM1R482000E3), Solar Converter Instructions (UM1S482000E3), -48 VDC to +24 VDC Converter
Instructions (UM1C48241500), or -48 VDC to -58 VDC Converter Instructions (UM1C48582000P3) and inverter instructions
(UM1I1201000) for a rectifier, solar converter, -48 VDC to +24 VDC converter module, or -48 VDC to -58 VDC converter module and
inverter module replacement procedure. Refer also to “System Troubleshooting Information” on page 39.
The rectifier, solar converter, -48 VDC to +24 VDC converter module, or -48 VDC to -58 VDC converter module or inverter module
being replaced is assigned by the NCU the lowest available identification number. If desired, you can change the identification
number, see “Configuring the NCU Identification of Rectifiers”, “Configuring the NCU Identification of Solar Converters”, or
“Configuring the NCU Identification of -48 VDC to +24 VDC Converters or -48 VDC to -58 VDC Converters, Configuring the NCU
Identification of Inverters” in the separate Power System Installation Manual (IM582137100).
5.6.2 Replacing the NCU Controller
Refer to the NCU Instructions (UM1M830BNA) for a controller replacement procedure.
5.6.3 Replacing a Distribution Device
Replace distribution devices with the same type and rating. Refer to System Application Guide SAG582137100 for part numbers.
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