12-46 Cabinet maintenance operations
AccessNode 323-3001-210 Issue 1.0
Procedure 12-14
Replacing a fan unit in the air induction roof
This procedure explains how to replace a fan unit in the Series 800A cabinet
with the NT7A69AA-CA air induction roof options.
Note: Fan replacement must be completed within four hours of failure.
Equipment or service outages may result due to excessive heat build-up in
the cabinet
.
Tools required
A screwdriver, flat head medium, is required.
Material required
A NT7A99EA fan replacement kit is required.
Action
Step Action
1 Open the electronics compartment doors (on the front side).
2 Turn OFF circuit breakers CU A and CU B on the BIP.
3 Open the equipment bay frames and locate the defective fan
(see Figure 12-12 on page 12-47).
4 Remove the fan grill and two screws.
5 Disconnect the fan connector from the fan wiring harness.
Note:
Do not discard or misplace the two screws and fan grill
(see Figure 12-12 on page 12-47).
6 Install the new fan using the screws and fan grill removed in step 4.
7 Plug fan connector back into fan wiring harness.
8 Repeat step 3 through step 7 for each defective fan.
9 Turn CU A and CU B ON to verify that the new fan is operating properly.
10 Close the electronics compartment doors.
—continued—
CAUTION
Fire hazard
Remove all paper and any other combustible materials from
inside the cabinet before the cabinet is powered up.
Failure to comply with this warning could result in a fire.
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