Huawei BBU3900 - Figure 3-12 Panel of the UPEUA; Table 3-12 LED on the FAN Unit and Its Status; Upeu

LEDs
The FAN unit has one LED, indicating the running status of the module. Table 3-12 describes
the LED on the FAN unit and its status.
Table 3-12 LED on the FAN unit and its status
Label Color Status Description
STATE Green On for 0.125s and off
for 0.125s
The module is not
registered, and no
alarm is reported.
On for 1s and off for
1s
The module is
running properly.
Red Off No alarm is reported.
On for 1s and off for
1s
The module is
reporting alarms.
3.2.5 UPEU
The Universal Power and Environment Interface Unit (UPEU) is a mandatory board of the
BBU3900. It converts -48 V or +24 V DC power to +12 V DC power.
Panels
The UPEU is classified into the Universal Power and Environment Interface Unit Type A
(UPEUA) and the Universal Power and Environment Interface Unit Type B (UPEUB). The
UPEUA converts -48 V DC power to +12 V DC power and the UPEUB converts +24 V DC
power to +12 V DC power. Figure 3-12 shows the UPEUA panel and Figure 3-13 shows the
UPEUB panel.
Figure 3-12 Panel of the UPEUA
(1) Power switch of the BBU
3 BBU3900 Equipment
BBU3900
Hardware Description
3-14 Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
Issue 11 (2010-11-10)