Removing And Replacing A Fan Tray - 3Com 3CB9E7 - CoreBuilder 9000 Chassis Switch Getting Started Manual

70 C 7: M
HAPTER AINTENANCE FOR THE
Insert each of the three end wires into the slots of the
7
DC input connector (Figure 31).
Figure 31 –48-volt DC Power Supply Labels
8 AWG
gauge wires
DC
power source
Using a slotted-blade screwdriver, secure each wire to
8
the DC input connector.
Attach the other end of the 8 AWG gauge wires to
9
the building's DC power source, then verify that all
connections at the power supply and the power
source are security attached.
WARNING: Make certain that the polarity orientation
from the DC power source to the –48-volt DC power
supply connector is the same.
Turn on the building's power source circuit breaker
10
that connects to the –48-volt DC power supply.
Set the power supply's Standby/On switch to the On
11
( ) position and follow the normal operating
procedure for your CoreBuilder 9000 7-slot chassis.
7-S C
LOT HASSIS
ON
-48V
0V
STANDBY
INPUT RATING
-48 V /27A

Removing and Replacing a Fan Tray

This section describes how to remove and then
replace a fan tray for the 7-slot chassis:
CAUTION: The CoreBuilder 9000 7-slot Switch
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. Run the 7-slot Switch with all four
fans operating in the fan tray.
You can remove the fan trays and then install them
without powering off the Switch. This is called hot
swapping.
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
here and return the components to your supplier.
Keep replacement power supply units and fan trays at
your site so that they are available if needed.