@omarfetouh - Some people that watch this forum are great at troubleshooting, but there isn't anything for them to shoot at.
Is there a picture of the wiring connections to the Rachio that can be uploaded?
If there is a picture of the wiring on the former Rainbird controller, attach it.
Is a rain sensor installed? If so, has it rained recently or has the system be tried without the rain sensor connected?
Does this installation use a master pump?
Is the water turned on to the sprinkler system?
What light(s) are lit on the face of the Rachio?
Was the Rainbird setup run right before converting over to Rachio so that it was in a known working configuration?
You can also call into Rachio support and ask for wiring help - I understand they are magicians at getting wiring problems figured out, solved and the Rachio working.