Nortel Networks 400 4.0, BCM200 Removing a BCM400 cooling fan, To remove a BCM400 cooling fan

324Chapter 25 Replacing or installing a cooling fan

Figure 176 Cooling fan replacement overview

FAN LED and/or temp. LED indicate problem

Set up unit for maintenance

Disconnect and remove failed fan

Install new fan.

Connect fan cables to power

Restore unit to operation

Check fan LED

Removing a BCM400 cooling fan

Use this procedure to remove the cooling fans in a BCM400 standard or redundant feature option (RFO) configuration. The BCM400 standard main unit has one fan. The BCM400 RFO has two fans.

Warning: Protect the hardware components against damage from electrostatic discharge. Always wear a grounded wrist strap before you handle components. Always place the components in a static-free container.

Before you shut down the system, determine if a fan (in the redundant version) has failed. Refer to Table 84.

To remove a BCM400 cooling fan

1Shut down the system (see “Performing a system shutdown” on page 231).

2Disconnect the BCM system from the AC power outlet.

3Attach one end of the grounding strap to your wrist and the other end to a grounded metal surface.

4Remove the fan access panel at the rear of the BCM400 main unit (see Figure 177):

a Remove the fan access panel screws at the top and bottom of the panel. Place the screws in a safe location.

b Tip the top of the fan access panel toward you.

c Grasp the fan access panel with both hands and lift the away from the main unit. Do not stretch the fan cables.

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