User's Manual Part 3

RBS 2308 and RBS 2309 User’s Guide
RRU Temp
If the yellow RRU temp indicator is on and the conditions are hot, perform the
following actions step-by-step until the fault ceases:
• Ensure that airflow is not obstructed above or below the RRU, or through
its cooling flanges
• Install a fan unit on the RRU
If the yellow RRU temp indicator is on and the conditions are cold, perform
the following:
• Ensure that the RRU is provided with AC power for the internal heater
Note: Under certain circumstances it can take up to 75 minutes for the RRU
to start up.
Note: RBS units from certain R-states are less sensitive to low temperatures
and have therefore no internal heater. For more information about unit
R-states from which these improvements apply, see chapter Product
Description, section Operating Environment in the following manual:
RBS 2308, RBS 2309, and RBS 2109
Hardware Reference Manual
EN/LZT 720 0058
10.5 HW Replacement
This section describ
es how to replace faulty units identified in Section 10.3
Fault Localization
Using O MT on page 176.
10.5.1 Replacing a Fan Uni
t
This section descr
ibes how to replace a faulty fan unit and how to test the
new unit.
Note: If the fan uni
t is permanently removed, then the power connector
protection cap on
the RRU must be put back.
2
07
EN
/LZT 720 0027 Uen R8A 2006-06-27