ALM-4200 Abnormal Fan Speed

Description

This alarm is reported when the fan speed exceeds 25% of the object speed.

Alarm ID	Alarm Severity	Alarm Type
4200	Minor	Fault

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. 65:DDRM
3	Board No.	Number of the fault board 0-53:DDRM
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. 13:BTS3006C; 14:BTS3002E;
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

The heat dissipation capability of the DTRU has gone down.

None.

The fan is aging or has obstacles inside.

Check whether there are obstacles inside the fan. Clear the obstacles and check whether the alarm is cleared.
Check if the extension DTMU or the slave DTMU has been installed or powered on.

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

N=> The alarm is not cleared. Go to Step 2.
Replace the fan and check whether the alarm is cleared
Y=>The alarm is cleared. Alarm handling is completed.

N=>The alarm is not cleared. Go to Step 3.
Replace the DTRU and check whether 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.