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Falling sparks and FAN inside
960 8 2017-8-6
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Kyokushin
Captain
Flight distance : 296378 ft
Poland
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I have theory, but this is just theory.

Maybe in some conditions a FAN inside of Sparks is stopping then it lead to overheating and power cut off.

Is that possible to check in logs information about FAN and its RPM?

I saw a FAN may change speed or may stop. Maybe in some conditions a fan just stopping and then not starting when cooling is needed.

Could you chech in your logs more info about condition of fan just before cutting power off?

2017-8-6
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$gambino$
First Officer
Flight distance : 1563980 ft
United States
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Its a good theory but i dont think there is any way to check .. maybe i should just pop the top off and fly around. It will def stay cool like that! Lol
2017-8-6
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fansa7dc5944
Second Officer
Flight distance : 50988 ft
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Thailand
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You may try blocking the ventilation, do not fly, see if any message from Dji Go. I believe there will be some when overheat occurs.
2017-8-6
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Kyokushin
Captain
Flight distance : 296378 ft
Poland
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In fact its good way to test. block vents, start engines, or hover few centimeters over soft pillow.

There is a risk - any overheating tests may cause damage - be aware of it before testing.
2017-8-6
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SuperCurro
lvl.3
Flight distance : 625863 ft
Spain
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My inside fan make a lot of noise and sometimes go slower than it should, the fan have a problem (at least mine). Could be a reason, but another one was a suddenly stops when fly in sport mode than cause a very high inclination than stop motors. This happened me running in sport mode full forward and pressed the pause button, engines stoped and the spark crashed.
2017-8-6
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Kyokushin
Captain
Flight distance : 296378 ft
Poland
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I put my Spark on desk then turned on. The fan was cooling at some rpm, then stopped, then started again. I am sure a fan is controlled.

I am not saying it is the issue, but it may be the issue.

DJI - please make a test, make a Spark hovering in hot place then get hot air and direct it on the Spark, and logg how a fan is working.
If you have some faulty example then better - do it on faulty unit, and then you will know its a matter of heat, matter or fan, or just a false clue.
If it will be NOT a matter of FAN, but a matter of heat, then you can test it is connected with battery or not.

Some spark felt even after two minutes of hovering - its not enough time rather to make things really hot, even if FAN will stop.
Honestly imo its rather a fault product line of batteries. Its the best way, because in that case only batteries should be replaced.

There is a folk in poland who is able to replicate the issue on his Spark with his battery. Two times his spark just felt after 2 minutes of hovering by some 'power cut off'.  I asked him to give a try on second battery.
2017-8-6
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fans5d9349b7
lvl.3
United Kingdom
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It's possible to turn on a Spark battery whilst it's detached from the drone.. detach it, turn it on and hit it with a hair dryer and see if it shuts itself down. I believe the falling sparks (like mine) are dodgy battery related.
2017-8-6
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250Flyer
lvl.2
Flight distance : 19170 ft
United Kingdom
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RE: Falling sparks and FAN inside

Kyokushin Posted at 2017-8-6 11:57
I put my Spark on desk then turned on. The fan was cooling at some rpm, then stopped, then started again. I am sure a fan is controlled.

I am not saying it is the issue, but it may be the issue.


I put my Spark on desk then turned on. The fan was cooling at some rpm, then stopped, then started again. I am sure a fan is controlled.

Mine does this also, I guess its normal.

How is your Spark doing since this thread?
2018-2-16
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S.J
Captain
Flight distance : 322454 ft
Kuwait
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DJI SPARK shows the warning message  ESC motors  overheated "" if the temp goes beyond 40 degree centigrade.
So don't worry too much. There are systems in place !!
2018-2-16
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