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7-Slot Chassis Fan Tray
Removal and Replacement
For the CoreBuilder
9000 Enterprise Switch
This document describes how to remove and install a fan tray (Model
Number 3CB9EF7) for the CoreBuilder
9000 Enterprise Switch 7-slot
WARNING: The CoreBuilder 9000 fan tray must be installed and
removed only by trained service personnel.
Fan Tray Description
The CoreBuilder 9000 Enterprise Switch 7-slot chassis contains one fan
tray, which contains four fans that cool the Switch (Figure 1).
Figure 1 Location of the Fan Tray in the CoreBuilder 9000 7-slot Chassis
There are no user-serviceable parts on the fan tray. If the component
fails, remove it as described in this document and return the
component to your supplier. Keep replacement fan trays at your site so
that they are available if needed.
Removing a Fan Tray
To remove a fan tray from the CoreBuilder 9000 chassis, follow these
1 Face the front of the chassis and using a flat-blade screwdriver, loosen
the two spring-loaded screws that attach the fan tray to the chassis
Figure 2 Location of the Two Fan Tray Spring-Loaded Screws
2 Grasp the handle on the fan tray, and firmly pull the fan tray towards
you (Figure 3).
7-Slot Chassis Fan Tray Removal and Replacement Guide
Figure 3 Removing the Fan Tray Using the Handle
CAUTION: Before you completely remove the fan tray, wait until all the
fans in the fan tray stop rotating.
Carefully pull the fan tray straight out from the chassis.
Installing a Fan Tray
Follow the instructions in this section to unpack and install a new fan
To unpack a fan tray:
1 Open the shipping box and remove the fan tray.
2 Inspect the fan tray for damage. If the fan tray or its connector
(Figure 4) appear to be damaged, repack it in the shipping box and
contact your local supplier.
All shipping boxes are reusable. After you remove all contents, replace
the packing materials and store the box for future use.
You can install a new fan tray in your CoreBuilder 9000 chassis while
the power is on.
To install a new fan tray:
1 Grasp the handle on the fan tray and then face the front of the
2 Locate the connector on the fan tray (Figure 4).
Figure 4 Fan Tray Connector
3 Slide the fan tray into the chassis (Figure 5), using the guides in the
7-Slot Chassis Fan Tray Removal and Replacement Guide
Figure 5 Installing the Fan Tray into the Chassis Using the Handle
4 Align the fan tray connector (Figure 4) and the backplane connector.
5 Gently push the fan tray inward until the connectors 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
6 Verify that the fan tray is flush with the front of the chassis. If the fan
tray and the chassis are not aligned, remove the fan tray and reseat it.
7 Secure the fan tray to the chassis by tightening the two spring-loaded
screws (Figure 5) using a flat-blade screwdriver. Tighten the
spring-loaded screws to a Torque Specification of from 5 to
To ensure that you tighten screws to Torque Specification, use a torque
The fans begin rotating the moment that you power on the chassis or
that you insert the fan tray into a powered-on chassis.
8 Visually inspect all installed fans to verify that each is turning without
interruption. If a fan is not running, shut the power off and remove
and reinsert the fan tray.
Follow these operating guidelines for the CoreBuilder 9000 fans:
If one fan in the fan tray fails, replace the fan tray as soon as
Do not leave the fan tray partially out of the fan tray slot. Make
certain the fan tray is fully inserted into the slot.
CAUTION: The CoreBuilder 9000 Enterprise Switch 7-slot chassis sends
a fan fault message (known as a trap) and can continue to run if one
fan fails in the fan tray. Replace the fan tray as soon as possible if one
fan fails in the fan tray. If one fan in the fan tray fails and the
temperature is 45 °C (113 °F) or greater, a trap message alerts you to
replace the fan tray immediately.
The CoreBuilder 9000 Enterprise Switch Getting Started Guide is
available in Adobe Acrobat Portable Document Format (PDF) format on
the 3Com Documentation CD-ROM that comes with the product.
The CD-ROM also contains:
Additional CoreBuilder 9000 documentation in Adobe Acrobat
Adobe Acrobat Reader and Reader installation instructions
If you have difficulty installing the Acrobat Reader, use an Internet
browser to download the Reader from the Adobe home page at
You can view additional 3Com technical documentation on the 3Com
home page at http://www.3com.com.
Click Support and look under
Documents and Software.
3Com Corporation L
The duration of the warranty for the CoreBuilder™ 9000 Enterprise Switch 7-slot Chassis Fan Tray (3CB9EF7) is 1 year.
3Com warrants its hardware products to be free from defects in workmanship and materials, under normal
use and service, for the following lengths of time from the date of purchase from 3Com or its authorized
If a product does not operate as warranted above during the applicable warranty period, 3Com shall, at its
option and expense, repair the defective product or part, deliver to Customer an equivalent product or part to
replace the defective item, or refund to Customer the purchase price paid for the defective product. All
products that are replaced will become the property of 3Com. Replacement products may be new or
reconditioned. Any replaced or repaired product or part has a ninety (90) day warranty or the remainder of the
initial warranty period, whichever is longer.
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No updates are provided. 3Com’s sole obligation with respect to this express warranty shall be (at 3Com’s
discretion) to refund the purchase price paid by Customer for any defective software products, or to replace
any defective media with software which substantially conforms to applicable 3Com published specifications.
Customer assumes responsibility for the selection of the appropriate applications program and associated
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Customer’s requirements or work in combination with any hardware or applications software products
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In addition to the Hardware Products Warranty and Software Products Warranty identified above, 3Com
warrants that all Heritage 3Com products sold or licensed to Customer on and after January 1, 1998 that are
date sensitive will continue performing properly with regard to such date data on and after January 1, 2000,
provided that all other products used by Customer in connection or combination with the 3Com products,
including hardware, software, and firmware, accurately exchange date data with the 3Com products, with the
exception of those products identified at 3Com’s Web site, http://www.3com.com/products/yr2000.html, as
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notifies 3Com before the later of April 1, 2000, or ninety (90) days after purchase of the product from 3Com or
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proper performance of such product, repair such product, deliver to Customer an equivalent product to replace
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Any software update or replaced or repaired product will carry a Year 2000 Warranty for ninety (90) days or
until April 1, 2000, whichever is later.
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Other hardware products
*unless otherwise specified above
Spare parts and spares kits
Customer must contact 3Com’s Corporate Service Center or an Authorized 3Com Service Center within the
applicable warranty period to obtain warranty service authorization. Dated proof of purchase may be required.
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Copyright © 3Com Corporation, 1998. All rights reserved. No part of this documentation may be
reproduced in any form or by any means or used to make any derivative work (such as translation,
transformation, or adaptation) without permission from 3Com Corporation.
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Part No. 10009847
Published November 1998