ALM-9748 Entironment temperature alarm

Description

The temperature values are invalid for successive 60 seconds and the alarms are reported; Or, the temperature is higher than the over temperature threshold for successive 60 seconds; or the temperature is lower than the under threshold for successive 60 seconds;

Attribute

Alarm ID	Alarm Severity	Alarm Type
9748	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. 93:FMU 94:FMUA
3	Board No.	Number of the fault board 0-7:FMU/FMUA
4	PassNo	Number of the passage where the faulty board is located.
5	SubLink No.	Alarm sub-category number 0：over alarm 1：under alarm 2：sensor invalid alarm
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. 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

The temperature sensor on the fan board is faulty.
The fan board is faulty.
The alarm threshold is set improperly.
The humidity of the environment is not normal.

System Actions

None.

Possible Causes

The temperature sensor on the fan board is faulty.
The fan board is faulty.
The alarm threshold is set improperly.
The humidity of the environment is not normal.

Procedure

Check whether this is a sensor invalid alarm based on the alarm tributary number. If so, go to a; if no, check whether this is an overtemperature alarm. If so, go to b; if no, go to c.
1. humidity sensor invalid alarm.
2. Check whether the temperature value is proper.
  Y=> Go to Step 7.
  
  N=> Go to Step 2.
3. Check whether the temperature sensor is connected properly.
  Y=> Go to Step 4.
  
  N=> Go to Step 3.
4. Connect the temperature sensor properly.
5. Check whether the cable is connected properly.
  Y=> Go to Step 6.
  
  N=> Go to Step 5.
6. Replace the cable.
7. Replace the environment sensor and check whether the alarm is cleared.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 7.
8. Reset the fan control board and check whether the alarm is cleared.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 8.
9. Replace the fan control board.
10. Ambient Humidity Too High
11. Check whether the temperature value is proper.
  Y=> Go to Step 3.
  
  N=> Go to Step 2.
12. Check whether the temperature value and the actual value are consistent.
  N=> Go to Step 4.
13. Reset the fan control board and check whether the alarm is cleared.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 4.
14. Replace the humidity sensor and check whether the alarm is cleared.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 5.
15. Replace the fan control board.
16. Ambient temperature Too Low
17. Check whether the temperature value is lower than the alarm threshold.
  Y=> Go to Step 3.
  
  N=> Go to Step 7.
18. Check whether the temperature value and the actual value are consistent.
  N=> Go to Step 4.
19. Reset the fan control board +CQ22 and check whether the alarm is cleared.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 4.
20. Replace the temperature sensor and check whether the alarm is cleared.
  Y=> The alarm is cleared. The alarm handling is complete.
  
  N=> Go to Step 5.
21. Replace the fan control board.