ALM-3930 DC Over Voltage alarm

Description

This alarm is reported when the DC voltage is higher than the upper limit.

Attribute

Alarm ID Alarm Severity Alarm Type
3930 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.

133:APM

3 Board No.

Number of the fault board

0:PMU0

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 or module is located

9: BTS3002C

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

None.

System Actions

None.

Possible Causes

This alarm is generated when the PMU detects that the DC -48 V voltage output by the NPSU is above the upper limit.

Procedure

  1. Check if the DC -48 V voltage is above the upper limit.

    Check if the DC -48 V voltage is above the upper limit.

    Y=>Go to Step 2.

    N=>Go to Step 3.

  2. Check if the NPSU has alarms.
    1. Check the current alarms to see if there is ALM-4004 PSU Failure Alarm.

      Y=>Go to the step b.

      N=>Go to Step 3.

    2. Replace the PSU that reports the alarm.

      If the PSU has back up, stop the PSU and then see if the alarm is cleared.

      Y=>Alarm handling is completed.

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

  3. Replace the PMU

    Replace the PMU and see if the alarm is cleared.

    Y=>The alarm is cleared. Alarm handling is completed.

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


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