3Com 4007, Getting Started Manual

Page: 53 / 92

6
M
AINTAINING THE
S
WITCH
4007
This chapter describes the routine maintenance to
perform to keep your Switch 4007 chassis working at
its best. This chapter also provides instructions for
replacing power supplies and fan trays.
WARNING: Only trained electrical service personnel
should perform switch connections and
disconnections.
WARNING: Hazardous energy levels exist inside of
the chassis. Do not place hands or objects into the
switch or touch components on an inserted module.
There are no user-serviceable parts on either the
load-sharing power supplies or on the fan trays. If
these components fail, remove them as described in
this chapter and return them to your supplier. Keep
replacement power supply units and fan trays at your
site so that they are available if needed.
This chapter provides information about the
Switch 4007 chassis and contains the following
topics:
■
Routine Maintenance
■
Removing and Replacing a Power Supply
■
Removing and Replacing a Fan Tray
■
Installing a 16 MB Expansion Memory Card
Routine Maintenance
On a regular basis, inspect your Switch 4007 chassis
to verify that all blank faceplates are securely attached
to the chassis, and the fans are running.
CAUTION: The Switch 4007 sends a fan fault
message when one fan fails in the fan tray. However,
the switch can continue to run if one fan fails in the
fan tray. If a second or third fan fails, in that fan tray,
no trap message is generated. Replace the fan tray
within 48 hours of receiving the trap message or
contact your service representative.
■
Ventilation to the switch is unobstructed.
■
All modules are securely seated in the backplane
and firmly attached to the chassis.
■
Module LEDs are functioning normally and show
normal readings.
■
Power requirements for all installed modules are
met by the power supplies.
■
Power cords from each power supply are not
frayed or damaged.
■
Cables that run from each installed module are
securely attached and in good condition.
■
If rack-mounted, the chassis and the cable
management device are securely attached to the
rack.