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FAQ-Why Is the Alarm Still Given When the Board Temperature Is Lower than the Threshold

Publication Date:  2012-07-27 Views:  35 Downloads:  0
Issue Description
Q:
Why is the alarm still generated when the board temperature is lower than the threshold?
The alarm is generated when the temperature of the board inserted in slot 1 of the NE40E is lower than the threshold.
The alarm is as follows:
dis alarm all
----------------------------------------------------------------------------
Level           Date          Time                Info

Error       08-04-08       17:39:18         SlotID1, address1 temperature over minor
threshold
----------------------------------------------------------------------------
dis temperature slot 1
Address     Status      Minor      Major      Fatal     Adjust_speed      Temp.(C)      TMin     Tmax
-----------------------------------------------------------------
1                   MINOR      54           60            74        40                     51                     52
2                   NORMAL  54           60             74        40                    51                     46
3                   NORMAL  70           76             85        54                    67                     43
4                   NORMAL  65           71             90        50                    62                     43
7                   NORMAL  65           71             90        50                    62                      31 
 
Alarm Information
Null
Handling Process
A:
The temperature of the equipment was higher than the threshold (540C) previously. Although it dropped a bit later to 520C, it was only 20C lower than the threshold. Generally, the equipment has a temperature threshold. The alarm is cleared only when the temperature is at least 50C lower than the threshold. The aim of alarming is to remind the user of finding out the cause for the high temperature to avoid the hidden peril.
After the dust screen was cleaned, the temperature dropped obviously and the alarm disappeared.
dis temperature slot 1
Address  Status         Minor     Major     Fatal     Adjust_speed     Temp.(C)     TMin Tmax
-----------------------------------------------------------------
1               NORMAL   54            60          74        40                          51              38
2               NORMAL   54            60          74        40                          51               35
3               NORMAL   70            76          85        54                          67               32
4               NORMAL   65            71          90        50                          62               34
7               NORMAL   65            71          90        50                          62                33
dis alarm all
----------------------------------------------------------------------------
NO alarm
---------------------------------------------------------------------------- 
 
Root Cause
Null
Suggestions
Null

END