This alarm is
triggered when the PSU is faulty.
Troubleshooting
steps
1) Please confirm whether additional PSU
is configured in the data configuration, if yes, delete the additional data;
the alarm is not cleared, go to next step;
2) Plug PSU again, confirm PSU was
installed tightly, the alarm is not cleared, go to next step;
3) Observe whether the PSU fan work
normally, if not, Replace PSU；if yes, go
to next step;
4) Take out of other normal PSU，install
faulty PSU again, if alarm still appears, go to next step;
5) Change faulty PSU slot, if alarm still
appears, go to next step;
6) Replace faulty PCU, if alarm still
appears, go to next step, Please contact Huawei
technical support.
Troubleshooting
steps:
1)
Check
whether the cabling of the heater is secure, and Reconnect the cables, Observe
whether the alarm is cleared after the reconnection, the alarm is not cleared.
Go to next step;
2)
Replace
the heater of the DHEU, The alarm is not cleared. Go to next step;
3)
Replace
the DHEC, Observe whether the alarm is cleared after the replacement, the alarm
is not cleared. Please contact Huawei technical
support.
Troubleshooting
steps:
1)
Check
if the LMT sends the shutdown command to the power system, if yes, Power on the
power system. See if the alarm is cleared. Go to next step, if command is not
sent, Go to next step;
2)
Check
if the output of the power system is normal; also check whether there are other
alarms. If have, solve power system problem, if have not, go to next step
3)
Replace
the DPMU that has an alarm. The alarm is not cleared. Please contact Huawei technical support.
Troubleshooting
steps:
1)
Check
PMU DIP switch, 1,2 should be ON, other should be off;
2) check if the PMU module is on the
right slot and power on, re-install the PMU module and power on again,
re-connect the PMU communication cable, check if the alarm disappear, if yes,
go to next step;
3) replace the PMU module, check if the
alarm disappear, if no, go to next step;
4) replace the PMU communication cable,
check if the alarm disappear, if no, go to next step;
5) disconnect the communication cable
that connect the DDPU board, the DEMU board and the FAN module to the CBUS
6)
Replace
the DTMU board, check if the alarm disappears, if no, Please contact Huawei technical support.
Troubleshooting
steps:
1) replace the DTRU module, check if the
alarm disappear, if no, go to next step;
2) replace the main-control module, check
if the alarm disappear, if no, go to next step;
3) check if the cable between the DTRB
backboard and the DSCU board is good, re-connect this cable, check if the alarm
disappear, if no, go to next step;
4)
Replace
the DSCU board, the DTRB backboard and the main-control backboard in turn,
check if the alarm disappears, if no, Please contact Huawei
technical support.
Troubleshooting steps:
1) Check if the data configuration is
consistent with the hardware configuration, and the DTRU module is on the right
place, if yes, go to next step; if not, re-install the DTRU module or update
the data configuration.
2) Check if the site has been reset
manually or the power is turned off, if yes, don’t handle it; if not, go to
next step;
3) replace the DCSU signal transfer board
and check if the alarm disappear, if no, go to next step;
4) Replace the cable between the DCSU and
DTRB, check if the alarm disappear, if no, go to next step
5) Replace the faulty DTRU, check if the
alarm disappear, if no, go to next step
6)
Replace
the main controlling module, check if the alarm disappears, if no, Please
contact Huawei technical support.
Troubleshooting steps:
1) Replace the DTRU module, check if the
alarm disappear, if no, go to next step;
2) Replace the main-control module, check
if the alarm disappear, if no, go to next step;
3)
Replace
the DCCU board, check if the alarm disappears, if no, Please contact Huawei technical support.
Troubleshooting steps:
1) Check if the connections at the power
output port of the DTRU are secure, Secure the
connectors and reset the DTRU. Check if the alarm is cleared. If no, go to
next step;
2) Check if the connections at the port
of the DDPU are secure, Secure the connectors and
reset the DTRU. Check if the alarm is cleared, if no, go to next step;
3) Replace the cables between DTRU and
DDPU. Reset the DTRU and see if the alarm is cleared. if no, go to next
step;
4) Replace the faulty DTRU and see if the
alarm is cleared, if no, go to next step;
5) Replace the DDPU. Reset the DTRU and
see if the alarm is cleared, if no, contact Huawei
technical support.
Troubleshooting
steps:
1) Check whether the RF cable connected to the diversity receive port on the DTRU is
loose or damaged. Secure the loose connector to the port or replace the damaged
cable, Check if the alarm is cleared. If no,go to next step
2) Replace the faulty DTRU and see if the
alarm is cleared, If no,go to next step
3) Replace the faulty DDPU. Check if the
alarm is cleared, If no,go to next step
4) Check whether the diversity receive RF cable between the DDPU and cabinet top is is loose or damaged. Secure the loose connector to the
port or replace the damaged cable, If no,go to
next step
5) Check all the cables and devices
between the cabinet top and antenna to see whether there is any loose cable
connector, cable damage or TTA damage, Secure the cable connector to the
relevant port or replace the cable or TTA, If no, contact Huawei technical support.
Notice, for the cells
for indoor coverage, only install main receive cable(from
DDPU to antenna), so it is normal that there is this alarm
This alarm is reported when
the main controlling module detects abnormal communication between it and the
radio frequency (RF) front module.
Troubleshooting
steps:
1) Check if the RF module has been
installed and powered on., if not, Install it and connect the cables, then go
to step 3
2) Check the cables between the RF front
module and the main controlling module. Plug out the serial port cable of the
RF front module and see if the terminal and the terminal cable are normal. If
not, adjust the terminal and the terminal cable, then go to next step
3) Connect the cables of the RF front
module properly and power it on. Check whether the alarm is cleared. If no, contact
Huawei technical support.
Troubleshooting
steps:
1) Check the DIP switch settings of the BTS
Check whether the DIP switches S1, S2,
S10 and S11 on the TMU panel are correctly set. If no, modify the settings
based on the following descriptions:
S1: ON indicates that the impedance
over E1 ports 3 and 4 is 75 Ω; OFF indicates the impedance over the two
ports is 120 Ω
S2: ON indicates that the impedance
over E1 ports 1 and 2 is 75 Ω; OFF indicates the impedance over the two
ports is 120 Ω.
S10: ON indicates that the outer
conductor of E1 links 1 and 2 is grounded while OFF indicates that the outer
conductor is not.
S11: ON indicates that the outer
conductor of E1 links 3 and 4 is grounded while OFF indicates that the outer
conductor is not.
Check whether the alarm is cleared, if
no, go to next step.
2) Check the transmission link of the near-end BTS
a) Perform a loopback test by
connecting port RX0 with TX0 on the near-end BTS. Check whether the indicator
LIU0 on the TMU panel is off. If no, go to step 4.
b) Restore the connection to the
appearance before the loopback test. Check whether the alarm is cleared. If no,
go to next step
3) Check the peer transmission link
Perform a loopback test on the
transmission link at the upper level BSC or BTS. Check whether the indicator
LIU corresponding to the peer E1 link is off. If yes, The
peer transmission link is not available. Repair the peer transmission link and
the alarm handling ends. If no, please the alarm may be caused by hardware
failure. Contact Huawei Technical Support.
4) Replace the TMU
Replace the TMU and check whether the
alarm is cleared, if no, please contact Huawei Technical Support.
Troubleshooting steps:
1) Check whether the power module is
correctly configured, Check whether the number of power modules configured on
the maintenance system is the same with the actual configuration, if not, go to
next step
2) Reconfigure the module. See if the
alarm is cleared. If no, go to next step
3) Check whether the PSU and PMU in the
power system are secure. Check whether the PSU and PMU are tightly inserted,
if yes, go to step 4, if no, Pull out the board and tightly insert it. See if
the alarm is cleared.
Replace the faulty PSU. See if the alarm is cleared. If no, please contact Huawei Technical Support