Removing a fan interface board

You can remove a fan interface board (FIB) from a 5U expansion enclosure.

Before you begin

This task assumes that the following conditions were met:
  • All power cables were removed from the enclosure, as described in Powering off the 5U expansion enclosure.
  • The top cover, fan modules, and the other heavy FRUs (drives, secondary expander modules) were removed before the enclosure was removed from the rack.
  • The expansion enclosure was removed from the rack, as described in Removing a 5U expansion enclosure from a rack.

    Ensure that you use a lift to support the weight of the enclosure.

About this task

The 5U expansion enclosure contains two fan interface boards (FIBs). The FIBs act as the interface between the fans and the system drive board. FIB 1 connects fan modules 1 and 2 to the drive board; FIB 2 connects fan modules 3 and 4. If both fan modules controlled by a FIB fail, it is possible that the FIB needs to be replaced.

Important: Because this task is disruptive to the storage system, always attempt fan replacement first. See Removing a fan module and Installing or replacing a fan module for information about the removal and replacement procedures. Ensure that both fans are installed correctly. Perform the following procedure only if the amber fault LED on each fan remains lit ( 1  in Figure 1).
Figure 1. Fan module LED
Fan module LED

Procedure

  1. Using a cross head screwdriver, remove the narrow metal cover that is over the FIBs, as shown in Figure 2. The screws are on each side of the chassis. Place the cover and cover screws in a safe location.
    Figure 2. Location of the FIB cover
    FIB cover
  2. Use a cross head screwdriver to loosen the retaining screws on the FIB, as shown in Figure 3.
    Figure 3. Loosen the FIB screws
    Loosen the FIB
  3. Use the handle to pull the FIB out of the expansion enclosure chassis, as shown in Figure 4.
    Figure 4. Remove the FIB from the chassis
    Remove the FIB
  4. Place the FIB (shown in Figure 5) in a safe location.
    Figure 5. FIB parts removed from the chassis
    FIB parts removed from the chassis
  5. If needed, repeat steps 2 through 3 to remove the other FIB.

Replace the fan interface board

  1. To reinstall a fan interface board, or replace it with one from FRU stock, follow the procedure in Installing or replacing a fan interface board.