Replacing A Cooling Unit Power Cable - Nortel Passport 15000 Hardware Installation And Maintenance

Replacing a cooling unit power cable

Prerequisites
Procedure steps
Passport 15000, 20000 Hardware Installation, Maintenance, and Upgrade
Replace a BIP power output cable to restore power to the cooling unit.
• You must be familiar with "Safety considerations and best practices"
(page 53).
• You need cable assembly NTHR66 for the connection from the BIP to
any version of the upper or lower cooling unit.
• Replacing a BIP power output cable includes replacing a cooling unit
power cable because they are part of the same power cable assembly.
Replacing one power cable means also replacing the other cables of the
assembly. Replacing one power cable at a time end-to-end until all cables
of the assembly are replaced minimizes the impact of having a fan out of
service.
• Switching off BIM breakers during the replacement will generate
software alarm 7012 0050.
1 Note the path of the old cable as indicated in the figure "Connection paths
of the power cables" (page 791).
2 Determine which BIM powers the cooling unit. Refer to 241-1501-200
Passport 15000, 20000 Hardware Description .
3 Switch off power to the cooling unit by pressing in the bar symbol (|) on
each middle breaker of the 2 BIMs that power the cooling unit.
4 Put tape over the breakers to indicate they are deliberately off.
5 Carefully cut the tie-wraps of the old cable assembly.
6 Using fingers only, unplug both ends of the old cable assembly by
pinching the tabs and pulling straight out.
7 Tracing from the disconnected ends, cut and discard the tie-wraps of all
power cables from the cooling unit up to the BIP.
If tie-wraps were shared between the power input cables on top of the
strain-relief bar and the cable assembly under the bar, replace the tie-
wraps on the power input cables.
8 Plug in one end of the new cable in the new cable assembly. The
connectors mate only one way.
Chapter 17 Hardware procedures 789
5.2S2