Replacing The Fan - Nortel AccessNode 2016 User Manual

Procedure 5-5

Replacing the fan

Use this procedure to replace the cabinet fans. You must replace the fans from
the front of the cabinet (termination compartment on the left and the AC
compartment on the right). Follow the fan sequence one, three, and five from
left to right on the top. Apply the fan sequence two, four, and six from left to
right on the bottom.
Action
Step
Bottom Fan Replacement
1
2
3
4
5
6
7
8
9
10
Action
Remove fan fuses on the ECU related to the damaged fan.
Disconnect power to the fan to be replaced. Verify that power is off before
proceeding.
Use 216-type tool to remove the middle bolts from each side of the front baffle
on the bottom heat exchanger fan assembly (see
safely aside for reinstallation.
Use the 216-type tool to remove the two bolts, one on each side, of the air
deflector. Set safely aside (see
Use the 216-type tool to unbolt the fan assembly. Slide out the fan assembly.
Pull out the harness assembly behind the duct and disconnect the power
plug. Set the fan assembly hardware aside for later reinstallation. Use the
216-type tool to remove the two bolts, one on each side, of the fan tray
assembly. Remove the old fan assembly (see
according to local practices.
Install the replacement fan assembly using the hardware removed previously.
Connect the power plug and place it behind the duct.
Reinstall the air deflector using the hardware removed in
Reinstall the front baffle using the hardware set aside in
CAUTION
Tighten all interior and exterior cover plate bolts to
25 in-lb (230-288 Newton-cm) to ensure a proper
gasket.
When all work is complete, apply power to the fans and verify fan operation.
—continued—
Figure
Figure 5-3).
Figure
User Guide Rel 1.0 Standard May 1999
Maintenance 5-7
5-2). Set the baffle
5-4) and handle
step 4.
step 3.