3Com 3CB9E7 - CoreBuilder 9000 Chassis Switch Getting Started Manual page 87

Slide the fan tray into the chassis (Figure 51).
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Figure 51 Installing the Fan Tray into the 8-slot Chassis or
16-slot Chassis Using the Handles
Fan tray
handles
Align the fan tray connector and the backplane
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connector.
Use the guide pin on the fan tray and the guide pin
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holes on the back of the chassis and gently push the
fan tray inward until the fan tray connector and
backplane connector engage.
You feel a slight resistance as the connectors engage.
CAUTION: If the resistance is too great, the fan tray
connector and backplane connector may not be
aligned properly. Do not force the fan tray inward or
you can damage the connectors. If necessary, remove
and reinsert the fan tray, ensuring that the connectors
are properly aligned.
Removing and Replacing a Fan Tray
Verify that the fan tray is flush with the back of the
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chassis. If the fan tray and the chassis are not aligned,
remove the fan tray and reseat it.
Using a flat-blade screwdriver, tighten the six
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spring-loaded screws to secure the fan tray to the rear
of the chassis (Figure 48).
The fans begin rotating the moment that you power
on the chassis or insert a fan tray into a powered-on
chassis.
Visually inspect all installed fans to verify that each is
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turning without interruption. If a fan is not running,
shut the power off and remove and reinsert the fan
tray.
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