20427 Abnormal PDB Output Switch Sensor

Description

This alarm is reported when a tripping operation or a manual power-off operation occurs on the input switch of the power distribution box.

Attribute

Alarm ID Alarm Severity Alarm Type
20427 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.

0=Powerbox Output Switch One,1=Powerbox Output Switch Two,2=Powerbox Output Switch Three,3=Powerbox Output Switch Four,4=Powerbox Output Switch Five,5=Powerbox Output Switch Six,6=Powerbox Output Switch Seven,7=Powerbox Output Switch Eight,8=Powerbox Output Switch Nine,9=Powerbox Output Switch Ten,10=Powerbox Output Switch Eleven,11=Powerbox Output Switch Twelve,12=Powerbox Output Switch Thirteen,13=Powerbox Output Switch Fourteen,14=Powerbox Output Switch Fifteen,15=Powerbox Output Switch Sixteen,16=Powerbox Output Switch Seventeen,17=Powerbox Output Switch Eighteen,18=Powerbox Output Switch Nineteen,19=Powerbox Output Switch Twenty

4 Switch Status

0=On,1=Off

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

  • The load connected to the output control switch is overcurrent or short-circuit.
  • Manual power-off operation.

System Actions

None.

Possible Causes

The system is overcurrent and the board is protected.

Procedure

  1. Make sure that the electric connection of the corresponding load is normal(check whether the load of power supply is short-circuited). Rectify the fault, 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.


Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.