Symptoms

Product affected are as follows: - S52xx-ON Normal Airflow P/N 2RPHX - S52xx-ON Reverse Airflow P/N R17R1 Description & Issue: Dell EMC S52xx-ON redundant PSU, once powered off, will enter a “PSU fault” state when attempting to power back on.A Dell EMC S52xx-ON device, with both PSUs in operation, upon lost of input to one of the PSU will enter a “PSU fault” state when input is recovered. The Dell EMC S52xx-on device will only be operating on one PSU with no redundant PSU available.

Cause

Root Cause:Hardware team discovered an issue with the PSU. Fan back pressure on the PSU prior to being powered-on results in reverse fan rotation. When power is restored to the PSU, this reverse fan rotation will trigger a PSU Fan Fault (amber LED) condition.

Resolution

Recovery and resolution Short term workarounds Power cycle the entire system (or)Diag-OS “ipmitool power cycle” Reload the switch.Choose ONIE. GNU GRUB version 2.02 +----------------------------------------------------------------------------+ | OS10-A | | OS10-B | |*ONIE | | | | | | | | | | | | | | | | | | | +----------------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, `e' to edit the commands before booting or `c' for a command-line. Select the EDA-DIAG option. (ONIE > EDA-DIAG.) Loading ONIE ... Welcome to GRUB! GNU GRUB version 2.02~beta2+e4a1fe391 GNU GRUB version 2.02~beta2+e4a1fe391 +----------------------------------------------------------------------------+ | ONIE: Install OS | | ONIE: Rescue | | ONIE: Uninstall OS | | ONIE: Update ONIE | | ONIE: Embed ONIE | |*EDA-DIAG | | | | | | | | | | | | | +----------------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, `e' to edit the commands before booting or `c' for a command-line. Loading EDA-DIAG x86_64-dellemc_s5200_c3538-r0 ... /EndEntire file path: /ACPI(a0341d0,0)/PCI(0,1c)/UnknownMessaging(1a)/HD(1,800,40000,0a3a1 612b26d1841,2,2)/File(\EFI\EDA-DIAG)/File(grubx64.efi)/EndEntire Welcome to GRUB! GNU GRUB version 2.02~beta2+e4a1fe391 GNU GRUB version 2.02~beta2+e4a1fe391 +----------------------------------------------------------------------------+ |*EDA-DIAG | | ONIE | | | | | | | | | | | | | | | | | | | | | +----------------------------------------------------------------------------+ Use the ^ and v keys to select which entry is highlighted. Press enter to boot the selected OS, `e' to edit the commands before booting or `c' for a command-line. Loading DIAG-OS ... AF, DXE_EXIT_BOOT_SERVICES(03101019) B, B, Debian GNU/Linux 8 dellemc-diag-os ttyS0 EDA-Diag credentials: Username: root, Password: calvin. dellemc-diag-os login: root Password: calvin root@dellemc-diag-os:~# ipmitool power cycle Long term solution New PSUs released. S52xx-ON Reverse Airflow P/N V1FD0 or VT5K1S52xx-ON Normal Airflow P/N D0F72 or KC3WY

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