User Manual

ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance
Page 5-14
© 2003, ADC Telecommunications, Inc.
5.2 Remote Unit Outdoor Cabinet Filters Cleaning Procedure
The RU outdoor cabinet filters clean the RU intake air before it enters the cabinet. The filters
should be cleaned approximately once per year and more often in extremely dirty environments.
If the cabinet temperature gradually rises over a long period of time and there are no fan
failures, it is possible that the filter is dirty and requires cleaning. Use the following procedure
to clean the RU outdoor cabinet filters:
1. Open the RU outdoor cabinet door as shown in Figure 5-1.
2. TBD
3. TBD
4. TBD
5. TBD
Figure 5-1. Air Filter Removal and Replacement
Table 5-10. Scheduled Maintenance
INTERVAL ITEM REQUIREMENT
12 months RU outdoor cabinet
filters*
Remove and clean the RU outdoor cabinet filters. Refer to
Section 5.2 for the required procedure.
60 months HU Fans
STM Fan
LPA Fan
Remove and replace the cooling fans in the HU, STM, and
LPA. Refer to specified section for the required procedures:
HU see Section 5.3, Section 5.4, and LPA see Section 5.5.
*Though it is not recommended that the RU be installed in a salt-air environment, if done so, clean the
cabinet filter on a monthly basis instead of on a 12 month basis. In addition, the RU should be
inspected for corrosion due to salt, particularly near the fans and around the connectors. The MTBF of
the RU may be impacted if the RU is exposed to salt-air.
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