A220 pilot reported flight control faults on takeoff roll.

Narrative

Aircraft X ZZZ-ZZZ1.Getting ready for takeoff XXL. We line up and wait and then are cleared for takeoff. I advance thrust to 50-60 percent N1. We get flight ctl fault;slat fault and flap fault followed by flap slow. We inform tower we need to exit runway and speak with maintenance. As we are taxing all messages go away. They give us a spot and I call maintenance. They had us work the flaps and slats; verified no messages and cleared us to continue to ZZZ1. We inform ground we are ready to continue back to the runway. We perform all checks and let them know we are ready for takeoff. We get cleared for takeoff and at 50-60 percent power we get the same messages. We exit runway and we again speak with maintenance. They inform us we are going to return to gate. We taxi to our new gate. We are holding short waiting for the gate to be ready. As we are waiting the same messages appear and disappear twice. Once the gate is ready we taxi to the gate. Maintenance comes on board and informs us they are going to take plane out of service.