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Power Conversion Station (PCS) LEDs

This topic provides information about various power conversion station (PCS) LED status and corresponding action suggestions.

The following minimal configuration is required for the solution to start:

  • One N1380 enclosure

  • One SC750 V4 tray

  • Two 32GB 2Rx8 DDR5 RDIMM per node in slot 7 and slot 18. (one DIMM per processor)

  • Three 15000W Power Conversion Stations (PCS)

  • One drive (any type) (If OS is needed for debugging)

  • One N1380 enclosure

  • One SC777 V4 tray

  • One GB200-NVL4 board

  • Two SOCAMM memory

  • Two 15000W Power Conversion Stations (PCS)

  • One drive (any type) (If OS is needed for debugging)

The Power Conversion Station get electrical power from a 380 - 480 V ac power source and convert the ac input into 48 V outputs. The Power Conversion Station are capable of autoranging within the input voltage range. There is one common power domain for the enclosure that distributes power to each of the tray and modules through the system interposer.

AC redundancy is achieved by distributing the ac power cord connections between independent ac circuits.

Each Power Conversion Station has internal water loops and a controller. The Power Conversion Station controller can be powered by any installed Power Conversion Station that is providing power through the interposer.

The enclosure does not support mixing of low input voltage Power Conversion Station with high input voltage power conversion stations. For example, if you install a Power Conversion Station with an input voltage of 100 - 127 V ac in a enclosure that is powered by 200 - 240 V ac Power Conversion Stations, the 100 - 127 V Power Conversion Station will not power on. The same restriction applies to a enclosure that is powered by 100 - 127 V ac Power Conversion Stations. If you install a 200 - 240 V ac Power Conversion Station in an enclosure that is powered by 100 - 127 V ac Power Conversion Stations, the 200 - 240 V ac Power Conversion Station will not power on.

The following illustration shows the LEDs on the Power Conversion Station:

Figure 1. Power Conversion Station (PCS) LEDs

1 Input (AC) power LED (green)3 Power Conversion Station (PCS) LED (yellow)
2 Output (DC) power LED (green) 

There are three LEDs on each DWC PCS :

1 AC power LED (green): When this LED is lit (green), it indicates that ac power is being supplied to the PCS in the corresponding PCS bay.

2 DC power LED (green): When this LED is lit (green), it indicates that dc power is being supplied from the corresponding PCS bay to the enclosure interposer.

3 Power Conversion Station (PCS) error LED (yellow): When this LED is lit (yellow), it indicates that there is a fault with the corresponding PCS bay. Dump the FFDC log from the system and contact Lenovo back end support team for PCS data log reviewing.
Note
Before unplugging the ac power cord from the DWC Power Conversion Station, or removing the DWC Power Conversion Station from the enclosure, verify that the capacity of the remaining Power Conversion Stations are sufficient to meet the minimum power requirements for all components in the enclosure.