Replacing The Components In The Omb - Huawei BBU3900 Hardware Maintenance Manual

BBU3900
Hardware Maintenance Guide
4

Replacing the Components in the OMB

About This Chapter
This chapter describes how to replace the components in the OMB, such as the BBU, HEUA,
AC/DC power equipment, DCDU-03B, and AC surge protection box.
4.1 Replacing the HEUA
The HEUA monitors the heat exchanger. The HEUA provides power to the FAN unit, monitors
the status of the FAN unit, and collects the alarm information about the cabinet and reports the
alarm to the main control unit.
4.2 Replacing the AC/DC Power Equipment
The AC/DC power equipment is used in an AC cabinet, converting external 220 V AC input
power into -48 V DC power.
4.3 Replacing the DCDU-03B
The DCDU-03B distributes DC power to different components. Replacing the DCDU-03B
disrupts the power supply to the entire base station and all the services carried by the base station.
4.4 Replacing the AC Surge Protection Box
The AC surge protection box provides protection for the AC input power.
Issue 03 (2010-06-05) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
4 Replacing the Components in the OMB
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