Overheating protection

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  • Updated 11 months ago
  • (Edited)
Hello,

I am wondering if Flex 6x00 rigs provide a overheating protection.
Last week, when temperature went over 38°C/158°F in South of Italy, it happened two times my 6300 powered off. PA Temp was each time about 70°C so I can suppose there is a overheating protection. I just want to point out that now everything is ok and that  when it happened I was calling CQ at full power from about 30 minutes, during the Ari 90 Years Award

Thank you very much and happy summer to everybody
73' Enzo
iw7dmh
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IW7DMH, Enzo

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Posted 11 months ago

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Tim - W4TME, Customer Experience Manager

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Yes.  If it gets too hot, the radio will shut down
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IW7DMH, Enzo

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Thank you very much Tiim,

please could you provide a bit more informations about thresold value?
I would like to implement a visual/audio alarm  in my controller and I am wondering if I can send a command to the rig for a graceful shut-down.
Probably this control and approach could be useful in  ssdr/maestro clients.

73' Enzo
(Edited)
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Tim - W4TME, Customer Experience Manager

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There are several processes that are temperature monitored.  The critical one being the FPGA temperature. The other is the PA, where the chassis fans will spin up to a higher speed once 70C is reached,  What the exact temperature thresholds are for a shutdown, I am not certain.  These would be API type questions for engineering.  You may want to send them an e-mail for more details.
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Scott N8UMW

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Interesting. I would like to know this as well. This has happened several times lately, once when i was sitting right in front of the computer and radio. Instant power down. In receive mode in my air conditioned shack.
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Scott N8UMW

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I don't. Unless the FPGA fan is intermittent. We already know that will shut it down. Never had a shut down during transmit with the PA fan ruining at high speed. In fact, the PA fan may have gone high speed four times since I purchased the radio as it is used in SSB mode the majority of the time.
(Edited)
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Scott N8UMW

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As you already know from previous posts, one reason besides power output was the FPGA fan spinning slow and making bearing noise as to the reasons I sent my radio in earlier this year. Not bashing, Tim. Here for information.
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Tim - W4TME, Customer Experience Manager

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Understood, but the context of this post is related to thermal shutdown and you indicated in your post that your radio had shut down due to overheating several times lately so I was trying to determine how you came to that conclusion. 

The FPGA throwing a fault from a fan failure is not a thermal shut down error.  It is a condition of the FPGA (or CPU) fan rotating below an accepted threshold for adequate cooling. The threshold incorporates sufficient headroom for a safety factor.  

We go to great lengths to prevent the FPGA from getting anywhere close to a thermal failure or damage point (it is the single most expensive component in the radio).  In the past 4 years, there have not been any instances of a thermal shutdown due to the FPGA overheating that I am aware of.  There have been a few temperature sensor failures, that that is a different fault condition.
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Scott N8UMW

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Very good. That answers a few questions I had. One being of that fan had a tach on it. Now I know it does. And the safety margin between adequate cooling and a failure. Mine has not shut down in the last few days. Now to try and figure why it did if it's not temp related.
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Ross - K9COX

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I have had this error several times "Shutting down Error FPGA fan speed". It was accompanied by fan noise and was instructed to clean the fan on a help ticket. It has not recurred in spite of not cleaning the fan since the radio is operated in a normal home environment. I believe there are several others that have experienced.this however I know Flex would take care of the problem if necessary. 
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Alan W4FBI

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I don't understand the 38C and 158F? 38C is about 100F...
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Greg - N8GD

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38 C is indeed a tad over 100 F (100.4 F to be exact). I'm sure the original post of 158 F is a typo and incorrect. That area of Italy has never seen such a temperature when the highest temperature ever recorded in history on earth was 134 F in Death Valley, California!

I just checked and it appears the original conversion was incorrect. The correct formula is:

F = C X 1.8 + 32

It appears the 32 was added in twice:

F = (32 + C) X 1.8 + 32, or (32 + 38) X 1.8 + 32 = 158 F
(Edited)
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IW7DMH, Enzo

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Yes, sorry,

it was a typo, 100.4 is the right value.
Actually 158 is the equivalent value of 70°C.

@Tim: what is the engineering email address? Up today I used to ask API questions in the community. Usually Eric or Steve ansered in few days (y)

73' Enzo
iw7dmh
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Tim - W4TME, Customer Experience Manager

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http://www.flexradio.com/amateur-products/flex-6000-signature-series/smartsdr-api/

Click on the API Support tab.  The e-mail address is there.