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controlled using temperature sensors located on the server board. When a fan fault is detected the fan controller drives the "Fan
Fault" signal "ON" in the fault LED on the fan assembly. Simultaneously, a composite fan fault LED, visible at the chassis front
bezel, is turned "ON" on the front panel LED board.
Before you can replace the fan control board, you need to remove the chassis cover, the support cross bar (and all components
attached to it), the baseboard power cables, the fan cage and the FCB cables. For instructions, see (A), (D), (E1), (G), and (E5) in
Chapter 4.
Removing the Old FCB
To remove the fan control board from the chassis:
1.
Three fan cables for the fan pairs (if not already disconnected when removing the fan cage)
2.
Unfasten the five screws on the fan control board that fasten it to the chassis floor. See Figure 43 for the locations of these
screws. Save the screws to use when installing the new fan control board.
3.
Lift the fan control board out of the chassis.
64
Installation and Maintenance Guide
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- Using the Bios Setup Utility
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