ALM-5078 Board Power Abnormal

Description

This alarm is reported when BBU detects a fault in its power module.

Attribute

Alarm ID Alarm Severity Alarm Type
5078 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.

87:GTMU
3 Board No.

Number of the fault board

0:GTMU
4 PassNo

Number of the passage where the faulty board is located.
5 SubLink No.

Alarm sub-category number

16: overvoltage alarm for the first sensor; 17: undervoltage alarm for the first sensor

32: overvoltage alarm for the second sensor; 33: undervoltage alarm for the second sensor

48: overvoltage alarm for the third sensor; 49: undervoltage alarm for the third sensor

64: overvoltage alarm for the forth sensor; 65: undervoltage alarm for the forth sensor

80: overvoltage alarm for the fifth sensor; 81: undervoltage alarm for the fifth sensor

96: overvoltage alarm for the sixth sensor; 97: undervoltage alarm for the sixth sensor

112: overvoltage alarm for the seventh sensor; 113: undervoltage alarm for the seventh sensor
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.

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

  • If the in-band transmission chip of the active MPT is faulty, the inter-board communications within the baseband subrack are interrupted and services cannot be performed normally.
  • If the in-band transmission chip of the standby MPT is faulty, the inter-board communications will not be affected but the reliability deteriorates.
  • The services on the faulty board are interrupted.

System Actions

None.

Possible Causes

  • The board hardware is faulty.
  • The power modules in BBU are turned off under high ambient temperature for protection sake.

Procedure

  1. Check the ambient temperature of BBU.
    1. Carry out LST ALMAF on the maintenance terminal and check whether there is the " BBU Temperature Abnormal alarm".

      Y => There is such an alarm. Go to step b.

      N => There is no such alarm. Go to Step 2.

    2. Clear the alarm according to the handling suggestions of it.
    3. Check whether the alarm is cleared:

      Y => The alarm is cleared. The alarm handling ends.

      N => The alarm is not cleared. Go to Step 2.

  2. Reset the BBU.

    Reset the BBU.Check whether the alarm is cleared:

    Y => The alarm is cleared. The alarm handling ends.

    N => The alarm is not cleared. Go to Step 3.

  3. Replace the BBU.

    Replace the BBU. Check whether the new board is available

    Y => The new board is available. The alarm handling ends.

    N => The new board is not available. Please contact Huawei Customer Service Center.

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