20428 Abnormal PDB Power Sensor

Description

This alarm is reported when the working power supply of the WDMB in the power distribution box is faulty.

Attribute

Alarm ID Alarm Severity Alarm Type
20428 Major Fault

Parameters

ID Name Meaning
1 Subrack No.

The number of the subrack
2 Logical Slot No.

0=0(Powerbox Monitor)
3 Sensor No.

The number of the sensor that resides in the board
4 Power Info

0=Normal,1=Abnormal
5 Alarm Attribute

0=Normal, Alarms period are longer than the Transient Threshold.

1=Transient Count, The times and the period of the alarms whose periods are shorter than the Transient Threshold are summed up. If the sum result is longer than the Alarm Occurrence Period Threshold or Alarm Occurrence Times Threshold, an alarm so called Transient Count Alarm is triggered. Because Transient Count Alarm is based on accumulative result, the recovery of the alarm may occur at least one Summing Cycle later. The Summing Cycle can be query by MML "LST STATSLDWIN".

Impact on the System

  • If the working power module (voltage: +5 V) on the MDMC is faulty, the communication of the MDMC is invalid. The alarm 20272 Monitor Board Out of Positionon the LMT.
  • If the power supply module of the sensor on the MDMC is faulty, the external sensors (such as water immersion sensor and smoke sensor), the power distribution output switch, and the lightning protection cannot be detected. Thus other alarms are generated.

System Actions

None.

Possible Causes

The power module has no output.

Procedure

  1. Change the power distribution monitor and control board, and 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.

Parent topic: BSC Alarm Reference
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