Figure 14-45 Power-on check in the indoor scenario with DC power supply (BBU installed
indoors and RRU powered outdoors)
LED Status and Output Voltage Check
l The normal status of the LEDs on a PMU is as follows:
RUN LED: blinking
ALM LED: off
l The normal status of the LEDs on a PSU is as follows:
Power LED: steady green
Protection LED: off
Fault LED: off
l The DC output voltage of an EPS ranges from -43.2 V DC to -57 V DC.
l The normal status of the LEDs on a CMUA is as follows:
RUN LED: blinking
ALM LED: off
DBS3900 (Ver.B)
Installation Guide
14 Indoor Scenario with DC Power Supply (BBU Installed
Indoors and RRU Powered Outdoors)
Issue 06 (2011-09-15) Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
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