Nortel Passport 15000, Hardware Installation And Maintenance, Page: 702 / 874

702 Chapter 17 Hardware procedures
241-1501-240 5.2S2
2 Facing the fans, check the LEDs of the cooling unit to ensure that none
are lit. This confirms that power is off since the fan blades can still be
rotating freely while slowing down.
3 At the right side of the lower cooling unit, disconnect power cable A by
pressing and holding the tabs on the side of the connector and pulling
straight out. (If A and B cables are above the lower cooling unit, they are
for the upper cooling unit.)
4 Label the cable to identify which connector it plugs into (for example, with
LA for lower unit, power connector A).
5 Repeat step 3 to step 4 for power cable B, using LB for the label.
6 Unfasten the 2 small slotted captive screws on the D-sub connector below
the A and B power connectors.
7 Leave the F1, F2, and F3 cables connected on the fan side of the cooling
unit.
8 Unfasten the 4 thread-forming 10-mm (3/8-in.) hex-head mounting screws
through the 2 mounting ears as shown in the figure “Location of the
mounting screws of a lower (front) cooling unit” (page 703). Put the
screws aside for re-use.
9 By gripping the mounting ears at either side of the unit, slide it straight out
and away from the frame. Be ready to support its weight of 9 kg (20 lbs).
10 Put the cooling unit on an anti-ESD protection pad or container.
Procedure job aid
Table 26
Location of cooling unit breakers on the front of the BIP
Cooling unit Position of BIM in
the BIP
BIP slot
number Cooling unit
breaker
lower right BIM 4 middle
lower middle right BIM 3 middle
upper middle left BIM 2 middle
upper left BIM 1 middle