ALM-6668 UPEU Fault Alarm

Description

The input/output voltage of the power board is abnormal.

Attribute

Alarm ID Alarm Severity Alarm Type
6668 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.

90:UPEU

3 Board No.

Number of the fault board

0-1:UPEU

4 PassNo

Number of the passage where the faulty board is located.

5 SubLink No.

Alarm sub-category number

Tributary 0: The input voltage is abnormal. That is, the input voltage is lower than 43.2 V (-48 V power board) or lower than 24 V (+24 V power board).

Tributary 1: The input voltage is abnormal. That is, the input voltage is higher than 13.5 V or lower than 9 V.

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.

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

When the alarm is generated, the power supply on the main control board is affected, and thus the services.

System Actions

None.

Possible Causes

  • The T1 chip is faulty.
  • The UPEU board is faulty.
  • The power cable is not connected (If two UPEUs are installed in on BBU, each board should be connected to the power cable).

Procedure

  1. Press the power switch on the panel of the UPEU to power off it. Then, power on the UPEU. Before powering off the UPEU, ensure that the action is permitted. Because the BBU is powered off if the UPEU is powered off and the services are therefore affected.

    Check whether the alarm is cleared:

    Y => The alarm is cleared. No further action is required.

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

  2. Replace the UPEU. Check whether the alarm is cleared:

    Y => The alarm is cleared. No further action is required.

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


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