Vertiv | +24 VDC Power System User Manual (Section 6013) | Rev. G
MCA Load Share Alarm Feature ...................................................................................................... 103
MCA Emergency Stop Feature .......................................................................................................... 103
MCA Remote High Voltage Shutdown Feature ................................................................ 103
System Maintenance .......................................................................................... 104
Admonishments ................................................................................................................................................ 104
General Safety............................................................................................................................................................ 104
Voltages ........................................................................................................................................................................... 104
System Maintenance Procedures ................................................................................................... 105
Adding a Rectifier or DC-DC Converter Module to an Existing Shelf .......... 118
Adding a Module Mounting Shelf to the Power System .......................................... 120
Installing LVD Contactor Bypass Kits P/NS 514910 and 514912 ...................... 125
Installing Kit Part No. 514910 ........................................................................................................................125
Installing Kit Part No. 514912 ........................................................................................................................ 127
System Troubleshooting and Repair............................................................... 129
Contact Information ....................................................................................................................................... 129
Admonishments ................................................................................................................................................. 129
General Safety............................................................................................................................................................ 129
Voltages ........................................................................................................................................................................... 129
Circuit Cards ................................................................................................................................................................ 130
Rectifier Module Troubleshooting Procedures ................................................................. 130
Converter Module Troubleshooting Procedures ............................................................. 130
Troubleshooting Information ................................................................................................................. 131
General ............................................................................................................................................................................... 131
Adjustments .................................................................................................................................................................. 131
MCA Messages .......................................................................................................................................................... 131
Additional MCA Messages..............................................................................................................................132
Bypass Circuit Card Requirement ...........................................................................................................132
Updating the Inventory after Changes to the System Have Been Made ......... 133
Replacement Information ......................................................................................................................... 134
Replacement Assemblies ................................................................................................................................ 134
Replacement Cables ............................................................................................................................................ 134
Replacement Procedures ......................................................................................................................... 134
Replacing a Rectifier Module (PCU) .................................................................................................... 134
Replacing a Converter Module .................................................................................................................. 134
MCA Replacement ................................................................................................................................................. 134
Rectifier Shelf Interface Circuit Card Replacement............................................................... 156
Quad Low Voltage Disconnect Circuit Card Replacement ............................................ 160
Quad Shunt POD Circuit Card Replacement ............................................................................... 163
Alarm Termination/Audible Alarm Circuit Card Replacement ................................... 166
Interconnect/LVD Inhibit Circuit Card Replacement .......................................................... 169
List RD and RE Shunt POD Circuit Card Replacement ...................................................... 173
Alarm, Reference, and Control Fuse Replacement ................................................................. 175
Replacing a TPS/TLS-Type Fuse ........................................................................................................... 178