4116 TRX Voltage Alarm

Description

This alarm is reported when the output voltage of the power unit inside the Carrier Module is abnormal, causing the Carrier Module unable to run normally.

Attribute

Alarm ID	Alarm Severity	Alarm Type
4116	Major	Fault

Parameters

ID	Name	Meaning
1	Site No.	Number of the site where the faulty board or module is located Value range: 0-2047
2	Board Type	Number of the type which the faulty board belongs to. 65:DTRU/GTRU/DDRM 88:DRRU 92:DRFU 96:MRRU 100:MRFU 101:GRFU 102:GRRU 151:QTRU
3	Board No.	Number of the fault board
4	PassNo	Number of the passage where the faulty board is located.
5	SubLink No.	Alarm sub-category number 255:None
6	Cell Index	Index of the cell where the board or module is located 0-2047: Cell index of the faulty cell in the data configuration 65535: None
7	Site Type	Type of the site where the faulty board is located. 12:BTS3012; 13:BTS3006C; 14:BTS3002E; 15:BTS3012AE; 16:BTS3012 II; 17:DBS3900 GSM; 18:BTS3900 GSM; 19:BTS3900A GSM;
8	RackNo	Number of the rack where the faulty board is located.
9	BoxNo	Number of the subrack where the faulty board is located.
10	SlotNo	Number of the slot where the faulty board is located.
11	Site Name	Site Name
12	Alarm Attribute	Alarm Character 0:Normal 1:Transient Count

Impact on the System

The DTRU cannot run normally when this alarm is generated and other unpredicted alarms may be generated.

System Actions

When this alarm occurs, the system shuts off the power amplifier automatically.
For the DTRU of main BCCH, DTRU mutual aid is started.

Possible Causes

Faulty hardware of DTRU;
The -48V voltage is abnormal.

Procedure

Check if the -48V power supply is normal
Shut down the corresponding air-break switch of the faulty DTRX. Pull out the power cables of the DTRU. Test the voltage of the power supply to see whether it is normal (within the range of -40 V to -60 V)

Y=> Go to step 3.

N=> Go to step 2.
Test the input voltage of the lighting protection module of the power supply
1. BTS3012:
  Test the input voltage of the lighting protection module of the power supply to see whether it is normal (normal range: from -40V to -60V).
  
  Y=> Test the voltages of the lighting protection module of the power supply, EMI filter, BusBar power switch, and the corresponding air-break switch to check whether there is any contact problem, and replace the faulty equipment.
  
  N=> Please contact Huawei Customer Service Center.
2. BTS3012AE:
  Test the voltage at the BUSBAR power switch
  
  Test whether the voltage at the BUSBAR power switch is normal (normal range: from -40V to -60V) and see whether there is any contact problem.
  
  Y=> Go to step 3.
  
  N=> Please contact Huawei Customer Service Center.
3. BTS3006C:
  2) Test the voltage at the power switch
  
  Test whether the voltage at the power switch is normal (normal range: from -40V to -60V) and see whether there is any contact problem.
  
  Y=> Go to step 3.
  
  N=> Please contact Huawei Customer Service Center.
Replace the faulty TRX
Replace the faulty TRX [/#2001]. Check if the alarm is cleared.
Y=> The alarm is cleared. The Alarm Handling is completed.

N=> The alarm is not cleared. Please contact Huawei Customer Service Center.