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Faulty Temperature Sensor

Faulty Temperature Sensor

Created: Jul 13, 2020 06:28:26Latest reply: Jul 13, 2020 07:34:42 640 8 0 0 0
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Hi there.


I have an EA5801 OLT. I'm using only a single pon port with only 59 users. When I run the display temperature command it is showing the board temperature to be 67 degrees Celcius. But when I feel the underside of OLT it feels like a maximum of 40 degrees Celcius. Can it be a temperature sensor fault? How can I find whether it's a sensor fault?


Thanks.

OLT Series

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Chenxintao
Admin Created Jul 13, 2020 07:10:54

Hello, friend!


I'm very sorry that I didn't solve your problem last time I answered that question. 

It's nice to answer that question again.


Different plates have different heat resistance capabilities, and in different cases of the backplane, the same plate has different heat resistance capabilities. Generally, the temperature of all boards is kept below 80°C. 


The board temperature 67 degrees queried by running the command is within the normal range. Therefore, you do not need to worry about service interruption or device damage. 


The 40 degrees you're talking about is the temperature of the device's enclosure.

Our temperature sensor measures the temperature of internal components. 

The temperature of the chassis formed after the internal temperature of the device is dissipated by the heat sink of the device.

So the temperature you perceive is different from the temperature you get by running a command. 


Thanks!

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Unicef
Unicef Created Jul 13, 2020 07:55:11 (0) (0)
Good answer  
Chenxintao
Chenxintao Reply Unicef  Created Jul 13, 2020 08:06:59 (0) (0)
 
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liqiang185
liqiang185 Admin Created Jul 13, 2020 06:28:56

Hi,
We've noticed about your problem, and we're processing on it.
Kindly wait a second.
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Chenxintao
Chenxintao Admin Created Jul 13, 2020 06:38:25

Can you provide the specific board, my friend?
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user_3754066
user_3754066 Created Jul 13, 2020 06:49:26 (0) (0)
It’s an H921MPCA  
Chenxintao
Chenxintao Reply user_3754066  Created Jul 13, 2020 07:13:05 (0) (0)
I have updated the reply. If you have any questions, please feel free to ask. Thank you!  
(0) (0)
4#
Chenxintao
Chenxintao Admin Created Jul 13, 2020 07:10:54

Hello, friend!


I'm very sorry that I didn't solve your problem last time I answered that question. 

It's nice to answer that question again.


Different plates have different heat resistance capabilities, and in different cases of the backplane, the same plate has different heat resistance capabilities. Generally, the temperature of all boards is kept below 80°C. 


The board temperature 67 degrees queried by running the command is within the normal range. Therefore, you do not need to worry about service interruption or device damage. 


The 40 degrees you're talking about is the temperature of the device's enclosure.

Our temperature sensor measures the temperature of internal components. 

The temperature of the chassis formed after the internal temperature of the device is dissipated by the heat sink of the device.

So the temperature you perceive is different from the temperature you get by running a command. 


Thanks!

View more
  • x
  • convention：

Unicef
Unicef Created Jul 13, 2020 07:55:11 (0) (0)
Good answer  
Chenxintao
Chenxintao Reply Unicef  Created Jul 13, 2020 08:06:59 (0) (0)
 
(0) (0)
5#
junchang
junchang Created Jul 13, 2020 07:34:42

dear firend,


You can run the display fan alarm command to check the status of the EMU.


Example

To query the alarm information of the fan tray with EMU 1 , do as follows:

huawei(config)#interface emu 0

huawei(config-if-fan-0)#display fan alarm   

{ <cr>||<K> }:


  Command:          display fan alarm


  EMU ID: 1

  ----------------------------------------------------------------------------

  Alarm name                    Alarm state

  ----------------------------------------------------------------------------

  Read temperature fault        Normal

  Fan block                     Normal

  Temperature abnormal          Normal

  Power fault                   -

  Speed deteriorates            Normal

  ----------------------------------------------------------------------------

  Info: Power fault indicates that only one power board is configured or two pow

er boards are configured but one power input fails


thanks

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