User's Manual Part 3

Heat Management System
MAY 2004 1X SC480 BTS Hardware Installation, Optimization/ATP, and FRU 9-75
PRELIMINARY
Introduction
The procedures in this section cover only the removal and installation of
the Heat Management System (HMS)
System Impact/Considerations
If the HMS is failing or has failed there will be an interruption in call
processing. It is recommended that power be disengaged from the TME.
Required Items
Documents
None
Tools
S Screwdriver with T20 star bit
S Torque Driver Wrench or Torque Ratchet Wrench
S Socket, 10 mm, 3/8–in or 1/4–in
Replacement Item
S HMS
S Heater Elements
S Blower Fan
S HMS Controller
Periodic Maintenance
The louvers over the HMS intake fan need to be inspected and cleaned in
order to ensure proper operation of the TME/BTS. A vacuum cleaner or
soft bristle brush is recommended to clean the louvers.
The condition of the louvers must be monitored. The
recommended service interval is every 90 days, barring any
previous inspections. Once environmental conditions at the
site are established by inspection, it is possible that
cleaning intervals may need to be adjusted to more or less
than the nominal 90 day interval.
NOTE
Prerequisite
Coordinate this repair task with the OMC–R operator.
IMPORTANT
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