Thank you Ray for your answer.
I did some tests please find in attached files the results :
– photo 1) Test with slot 1 activated : around 17VAC
– photo 2) Test with slot 2 activated : around 28VAC
– photo 3) Test with slot 5 activated : around 28VAC but also slot 4
– photo 4) global installation with the 4 new rain bird sprinklers DV75. I thought the solenoid was not ok and tested with ohmmeter : 40 which seems to be quite good.
Whatever the voltage, I expected my sprinkler in off position to enable the flow when I activate the slot where the sprinkler is wired, and nothing happens.
I admit I spent 2 days to try to understand what is going wrong without success and am tempted to stop everything and send it back for refund but I can spend 2 more days if you can help to make it working. Thank you in advance
