Dell Chassis Management Controller Version 1.3 for PowerEdge FX2/FX2s User's Guide

The following information helps you to troubleshoot power supply and power-related issues:

• Problem: Configured the Power Redundancy Policy to Grid Redundancy, and a Power Supply Redundancy Lost event was raised.
  • Resolution A: This configuration requires the power supply in side 1 (the left slot) and the power supply in side 2 (the right slot) to be present and functional in the enclosure. Additionally the capacity of each supply must be enough to support the total power allocations for the chassis to maintain Grid redundancy.
  • Resolution B: Check if all power supplies are properly connected to the two AC grids: the power supply in side 1 must be connected to one AC grid, the one in side 2 must be connected to the other AC grid, and both AC grids must be working. Grid Redundancy is lost when one of the AC grids is not functioning.
• Problem: The PSU state is displayed as Failed (No AC) , even when an AC cord is connected and the power distribution unit is producing good AC output.
  • Resolution A: Check and replace the AC cord. Check and confirm that the power distribution unit providing power to the power supply is operating as expected. If the failure still persists, call Dell customer service for replacement of the power supply.
  • Resolution B: Check that the PSU is connected to the same voltage as the other PSUs. If CMC detects a PSU operating at a different voltage, the PSU is turned off and marked Failed.
• Problem: Inserted a new server into the enclosure with sufficient power supplies, but the server does not power on.
  • Resolution A: Check for the system input power cap setting—it might be configured too low to allow any additional servers to be powered up.
• Problem: Available power keeps changing, even when the enclosure configuration has not changed.
  • Resolution: CMC has dynamic fan power management that reduces server allocations briefly if the enclosure is operating near the peak user configured power cap; it causes the fans to be allocated power by reducing server performance to keep the input power draw below System Input Power Cap. This is normal behavior.

• Problem: Overall server performance decreases when the ambient temperature increases in the data center.
  • Resolution: This can occur if the System Input Power Cap has been configured to a value that results in an increased power need by fans having to be made up by reduction in the power allocation to the servers. User can increase the System Input Power Cap to a higher value that allow for additional power allocation to the fans without an impact on server performance.