ALM-3606 DRU Hardware alarm

Description

This alarm is triggered when the DRU RF circuit works abnormally (the output power is too large or too small), or the Flash Memory in the DRU fails.

Attribute

Alarm ID	Alarm Severity	Alarm Type
3606	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. 135:DRU
3	Board No.	Number of the fault board 0:DRU0 1:DRU1
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 or module 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 DRU fails and run abnormally upon occurence of this alarm. As a result, all services supported by this DRU are interrupted.

System Actions

The system shuts off the power amplifier upon the detection of the alarm at the first time, then starts the power amplifier again ten minutes later. Check whether the alarm still exists. If the alarm is cleared, the alarm handling ends. If the alarm occurs again, the system shuts off the power amplifier again. The system stops the self-action if the alarm still exists after having shut off and started the power amplifier for three times.

Possible Causes

The RF working voltage output by the MCU is abnormal.
The DRU hardware is faulty.
The MCU hardware is faulty.

Procedure

Reset the BTS
Perform fourth-level reset on the BTS3002C or reset it by power-down (recommended) through the LMT or local maintenance system. Check whether the alarm is cleared.

Y=> The alarm handling ends.

N=> Go to Step 2.
Remove and reinsert the MCU and DRU
Power down the BTS3002C. Remove and reinsert the modules on the backplane to ensure they are in well connection. Power up the BTS3002C and check whether the alarm is cleared.

Y=> The alarm handling ends.

N=> Go to Step 3.
Replace the MCU and DRU 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.