Nortel NN46200-301 Installation Manual page 21

You should replace a failed power supply as soon as possible to restore
high-availability operation.
To remove an AC power supply:
Step
1
2
3
Copyright © 2007, Nortel Networks
.
CAUTION
To maintain proper cooling, never operate the Ethernet Routing
Switch 8300 Series chassis with an empty power supply bay. If
you are replacing a failed power supply and you do not have a
power filler panel, leave the failed power supply installed until a
replacement power supply is available.
Action
Turn off the power switch on the power supply that you are replacing.
Disconnect the power cord from the power outlet and from the power
supply.
Loosen the two retaining screws on the power supply.
Nortel Ethernet Routing Switch 8300
Installation — AC Power Supply
NN46200-301 03.01 Standard
4.0 27 August 2007
Removing the AC power supply 21