Nortel Passport 7400, Hardware Installation, Maintenance, And Troubleshooting, Page: 214 / 438

214 Chapter 37 Hardware procedures
241-7401-240 5.2S1
Installing a 5-slot Passport switch cooling unit
Install a 5-slot Passport switch cooling unit after you remove the failed unit.
Prerequisites
• You will need a cooling unit with PEC NTEP14BA.
• The 5-slot Passport switch has two kinds of cooling units. In older
models, the fans connect when you push the cooling unit all the way to
the back of the switch. In newer models, you must plug each fan into a
connector inside the cooling unit door.
Procedure steps
1 Insert the back edges of the cooling unit tray into the tracks. Push the
cooling unit all the way into the switch.
If you have the newer model cooling unit, the wires that connect the fans
to the switch are at the front of the fan tray.
2 If you have the newer model, plug each wire into its connector and fasten
the wires with a tie wrap.
If you do not have the newer unit, continue to the next step.
3 Close the cooling unit door.
4 Lock the door: use a 1/4-in. slot-head screwdriver to turn the latch on the
cooling unit door one-quarter turn clockwise.