ALM-4206 SEND_DIV Channel Critical Alarm

Description

This alarm is reported in transmit diversity mode when a serious fault occurs on the two transmit channels of the double-transceiver.

Attribute

Alarm ID	Alarm Severity	Alarm Type
4206	Critical	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 services carried by the double-transceiver are interrupted when this alarm occurs.

System Actions

The power amplifier is automatically shut down by the double-transceiver. If the main BCCH is carried on the double-transceiver, the TRX mutual aid is started.

Possible Causes

The environment temperature is too high.
The heat dissipation system is abnormal.
The hardware of the BTS is faulty.

Procedure

Wait for the results of the system self-processing. Check whether the alarm is cleared.
Y=> The alarm is cleared. The alarm handling is complete.

N=> Go to Step 2.
Check whether a fan alarm occurs on the BTS.
1. Check whether a fan alarm occurs on the BTS.
  Y=> Go to Step b.
  
  N=> Go to Step 3.
2. Rectify the fan fault.
  See ALM-9736 Fan Fault Alarm.
  
  When the fan alarm is cleared, go to Step c.
3. Check whether the temperature of the power amplifier is normal.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 3.
Check the environment temperature around the BTS.
1. Check whether the temperature is higher than 55 ℃.
  Y=> Go to Step b.
  
  N=> Go to Step 4.
2. Lower the environment temperature. Check whether the alarm is cleared.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 4.
Replace the faulty DTRU. Check whether the alarm is cleared.
Y=> The alarm is cleared. The alarm handling is complete.

N=> The alarm persists.Please contact Huawei Customer Service Center.