IW SPM IP Fault Management
Nortel Networks Confidential
96
Copyright © 2004, Nortel Networks
3
Move the lock latches on each of the eight fan units to the
unlocked position as indicated on the faceplate of the fans.
4
Reaching inside the faceplate of the fans depress the latch and
slide fan unit out a few inches to unseat them from the NTLX55
cooling units in shelf positions XX and YY.
5
Wait two to three minutes to allow the fan blades to come to a
complete stop. Then completely remove the two fan units, in the
upper cooling unit, directly below the FMUs.
6
Unscrew the thumb screw on the front of the FMU.
FMU with thumb screw
DANGER
If the fans are not powered down, they will try
to conduct current when the new card is
inserted, resulting in possible sparks and
damage to the new card.