Thanks for the solution, this condensator, 1uf 275V decreased to 0,33uf and the compressor had not enough power to work. The relay did a beep every second like he was switching on and off directly. Not enough power also for the led controller.
We replaced with 3 condensator of 0,33uf 600vac because we didn't have 1uf 275v in stock.
And the compressor started directly.
So thanks you for the tip :)-
Aymeric, February 2016