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July 19, 2004
Fan Replacement Procedures
Because the fans used in the field cabinet are a wear item, the standard maintenance procedure for fans is to
replace the fan unit assembly when a fan alarm is reported. It is not recommended that an individual fan motor be
replaced.
All field cabinet fans exceed the Telcordia required minimum 40,000-hour L10 life rating (90% of fans operating
satisfactorily after this time period, approximately 5 years).
6F-type Fan Unit Replacement Procedure
1. Remove the AIP fuse(s) feeding power to the bay fans.
2. Locate the 6F-type Fan Unit at the top of the rack in the electronics compartment, directly above the
Valere power system.
3. Using a screwdriver, remove the two screws on the front of the fan unit.
4. Slide the fan unit forward and tilt downwards. Keep the rear tabs engaged so the fan unit is held in place.
5. Unplug the three fan connectors, which are located behind the fans, and remove the fan unit.
6. Position the replacement 6F-type Fan Unit so it is hanging by the rear tabs.
7. Connect the three fan connectors.
8. Slide the fan unit into position and secure the fan unit with the two screws removed in Step 2.
9. Insert the AIP fuse(s) feeding power to the bay fans.
10.Check for airflow at the front of the fan unit to ensure that the fans are functioning.
11.Check to ensure that no fan or fuse alarms are active.
Heat Exchanger Fan Replacement Procedure
1. Remove the AIP fuse(s) feeding power to the HX fans.
2. To access the heat exchanger fans at bottom of the front door, the heat exchanger cover must be opened.
Using a Phillips screwdriver, remove two M8 screws with sealer washers
3. Locate and unplug the fan's connector. The fan cable will be routed through a grommet at the bottom right
side of the electronics compartment. The connectors are located inside the electronics compartment near
this grommet.
4. Using a Phillips screwdriver, remove the two M8 screws that secure each fan-mounting bracket to the door.
Make sure the fan assembly is supported when removing the screws.
5. Cut any cable ties and remove the fan assembly.
6. Route the new fan cable through the field cabinet door opening beside the cable tie.
7. Attach the new fan and mounting bracket to the door using two M8 screws.
8. Route the cable through the grommet and reconnect.
9. Properly dress the cable and secure with cable ties. Ensure that the door can open and close completely
without damaging the fan cables.
10.Insert the AIP fuse(s) feeding power to the bay fans.
11.Check for airflow at the front of the fan to ensure that the fans are functioning.
12.Check to ensure that no fan or fuse alarms are active.
ADC Telecommunications, Inc.
SCP-PGCAB001-010-01H
(Figure 20 on page
48).
47
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