Checking the Power-on Sta
z This chapter describes only the power-on check of the equi
Start
z This takes the power-on check procedure in the AC power s
as an example. For details about the procedure in the DC pow
scenario, see the following procedure.
z Ensure that the external power supply is normal before pow
all the MCBs in the cabinet are set to OFF.
base station must be powered on in seven days after installati
Are the
LEDs on the PSU/PMU
normal?
Power on the BTS3900A Clear the fault
No
Is the voltage
of the EPU DC output
power normal?
Are the
LED
Yes
normal?
Are the
LEDs on the BBU
normal?
No
Yes
Yes
Power on DCDU Clear the fault
Is the voltage of
the DCDU DC output power
normal?
Yes
No
Are the
LEDs on the CMUE (RFC)
normal?
Are the
LEDs on the
1
normal?
Yes
End
te
The normal status of the
indicators on the PMU:
z RUN indicator: Blinking
ment. The
z ALM indicator: OFF
The normal status of the
indicators on the PSU:
z Power indicator: Steady green
z Protection indicator: OFF
z Fault indicator: OFF
The normal voltage range of the
output power to the EPUis from:
-43.2 V DC to -57 V DC
indicators on the CMUE:
z RUN indicator: Blinking
z ALM indicator: OFF
The normal status of the
indicators on the boards of the
BBU:
Indicators on the GTMU and
WMPT
z RUN indicator: Blinkin
z ALM indicator:ON for 1s and
then OFF
Indicators on the UPEU
RUN indicator: ON
Indicators on the FAN
STATE indicator: Blinking
The normal voltage range of the
DC output power to the DCDU-01
is from:
The normal status of the
indicators on the RFU:
z RUN indicator: Blinking
z ALM indicator: ON for 1s and then
OFF
z ACT indicator: ON
After the power-on check is
complete, close the cover of
the case, and the cabinet
door.
Lock
PSU
PMU
CMUE
Tighten the
screw to fix
the lockin
piece to
prevent the
lock from
rusting.
RFU