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188 Chapter 8 Install or Replace a Cooling Fan
P0993133 03
a Hold a piece of paper or your hand close to the fan exhaust. A correctly installed fan blows
air away from the platform base chassis.
b If the fan exhaust air flow is incorrect, remove the cooling fan (See “Remove a BCM200
cooling fan” on page 185) and re-install the fan in the correct orientation (this procedure).
8 This procedure is complete.
Remove an expansion unit fan
Use this procedure to remove a malfunctioning fan from the expansion unit:
The Business Communications Manager expansion unit comes either with one fan or a redundant
fan set. The single-fan unit is not upgradeable.
1 Shut down the system following the directions in “Shut down the system software” on page
145.
2 Disconnect the fan power cable from the hub card.
3 Locate the screws that fasten the fan casing to the expansion unit back wall and remove them.
Refer to Figure 115.
4 Remove the four screws (or snap rivets) that hold the fan to the expansion unit.
5 Lift the failed fan out of the expansion unit.
Warning: Protect the hardware components against damage from electro-static
discharge. Always wear a ground wriststrap before you handle components. Always place
the components in static-free container.
Note: If the unit has redundant fans, each fan has a connector on the hub board.