Removal/Replacement Procedures; Removal Procedures - Cisco VCO/4K Mechanical Assemblies

REMOVAL/REPLACEMENT PROCEDURES

5.0 REMOVAL/REPLACEMENT PROCEDURES
Only replace your fan unit in the event of a fan or fan-control card failure. The VCO/4K system
can operate without severe damage if up to two fans fail. However, replace your fan unit as
soon as possible. Call Cisco Systems for a replacement as soon as you detect a failure, or replace
the unit immediately with a spare unit if it is available.
CAUTION: Do not operate the VCO/4K without the fan unit or if more than two
fans have failed unless it is being removed and replaced in one operation.

5.1 Removal Procedures

You can remove fan units while the system is operating. If the unit is removed while the system
is operating, caution must be taken to ensure that no objects become lodged or tangled in the
operating fans while the unit is being removed. To remove a fan unit:
1. Unscrew the thumb screws located on the right and left sides of the fan unit. Refer to
Figure 3.
2. Slide the fan unit directly back about half way.
CAUTION: Do not fully remove the fan unit from the VCO/4K until the power
supply plug on the fan unit has been disconnected.
3. While the unit rests on the shelf, locate the power supply plug on the back, left side of
the fan unit. Squeeze the sides of the plug to release it and disconnect the plug.
4. After disconnecting the power supply, grasp the fan unit on both sides and continue
sliding it out until it is clear of the system enclosure.
5. Pack and ship the fan unit to Cisco Systems for service.
NOTE: Individual components of the fan unit are not field replaceable.
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