ALM-5086 BBU Power Alarm

Description

The power supply of each board is unavailable

Attribute

Alarm ID	Alarm Severity	Alarm Type
5086	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. 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 0：The 1.0 V power supply to the board Over Voltage. 1：The 1.0 V power supply to the board under Voltag. 2：The sensor of 1.0 V power is faulty 3：The 1.2 V power supply to the board Over Voltage. 4：The 1.2 V power supply to the board under Voltag. 5：The sensor of 1.2 V power is faulty 6：The 2.5 V power supply to the board Over Voltage. 7：The 2.5 V power supply to the board under Voltag. 8：The sensor of 2.5 V power is faulty 9：The 3.3 V power supply to the board Over Voltage. 10：The 3.3 V power supply to the board under Voltag. 11：The sensor of 3.3 V power is faulty 12: The 5.0 V power supply to the board Over Voltage. 13: The 5.0 V power supply to the board under Voltag. 14: The sensor of 5.0 V power is faulty 15：The 12.0 V power supply to the board Over Voltage. 16：The 12.0 V power supply to the board under Voltag. 17：The sensor of 12.0 V power is faulty 18：The 1.8 V power supply to the board is not normal.
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

When the alarm is generated, the main control module of the BTS fails to work properly.

System Actions

None.

Possible Causes

The hardware of the board is faulty.
The BTS ambient temperature is too high. Thus, overtemperature protection is triggered for the BBU.

Procedure

Check the BTS ambient temperature.
1. Run the LST ALMAF command to view the current active alarms, and then check whether 9746 BBU Temperature Alarm and 9744 BFU Fault Alarm are generated.
  Y => If either of the previous alarms is generated, perform "Clear the alarms".
  
  N => If neither of the previous alarms is generated, go to Step [2].
2. Clear the alarms.
3. Check whether the alarms are cleared.
  Y => If the alarms are cleared, the alarm handling is complete.
  
  N => If the alarms are not cleared, go to step [2].
Reset the board.
1. Reset the board.
2. Check whether the alarms are cleared.
  Y => If the alarms are cleared, the alarm handling is complete.
  
  N => If the alarms are not cleared, go to step [3].
Replace the board.
1. Replace the board.
2. Check whether the fault in the board is rectified.
  Y => If the fault is rectified, the alarm handling is complete.
  
  N => If the fault persists, contact Huawei Customer Service Center.