2010 115 trafic not starting.

[Alan Davidson]

See fault code, any help appreciated. 

DF502  computer internal overheating the protection has been activated ?

 

[Sharpend]

That sounds as though it’s the ECU gone faulty. I think if memory serves me right the ECU is prone to water ingress because of its location, although they may have modified it by your year? 
Best speaking with either a Renault forum or a Renault garage technician. You can ask to speak to a technician and most will come to phone. 
 

best of luck and please do update us.