ALM-3942 Ambient Temperature Too Low Alarm

Description

This alarm is reported when the ambient temperature is too low.

Attribute

Alarm ID Alarm Severity Alarm Type
3942 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.

85: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 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

The BTS services may be affected.

System Actions

None.

Possible Causes

This alarm is generated when the PMU detects that the ambient temperature is below than the set lower limit.

Procedure

  1. Check if the set lower limit of the temperature.

    Check if the lower limit of the temperature is set properly.

    Y=>Go to Step 2.

    N=>Go to Step "Reset the lower limit of the temperature and see if the alarm is cleared".

    Re-set the lower limit of the temperature and see if the alarm is cleared.

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

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

  2. Check if the heat exchanger works normally.

    Check if the heat exchanger works normally.

    Y=>Go to Step 3.

    N=>Go to Step Check the heat exchanger and ensure that it works normally. see if the alarm is cleared".

    Check the heat exchanger and ensure that it works normally. See if the alarm is cleared.

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

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

  3. Replace the temperature sensor 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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