ALM-4840 Rack Over Hot Degrade Alarm

Description

When the rack is too hot, the degradation operation is performed to the disable the power amplifier of some TRXs. In this case, this alarm is generated.

Attribute

Alarm ID Alarm Severity Alarm Type
4840 Warning 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.

64:DTMU/DOMU

87:GTMU

3 Board No.

Number of the fault board

0-5:DTMU/GTMU

4 PassNo

Number of the passage where the faulty board is located.

5 SubLink No.

Alarm sub-category number

0–8: Nine racks in the site.

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.

12:BTS3012;

13:BTS3006C;

14:BTS3002E;

15:BTS3012AE;

16:BTS3012 II;

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

Disable the power amplifier of the related TRXs in the rack.

System Actions

When the rack temperature restores to normal, the system enables the power amplifier of the related TRXs.

Possible Causes

The faulty heat exchanger of the outdoor cabinet leads to over-high ambient temperature.

Procedure

  1. Check whether the heat exchanger inside the cabinet works normally

    Y=> Please contact Huawei Customer Service Center.

    N=> Go to Step 2.

  2. Replace the monitoring board of the heat exchanger and lower the ambient temperature inside the cabinet

    Replace the DTMU and see if the alarm has been 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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