I have 2 actuators to divert water to a in pool spa and water feature. Both have stopped working. I have taken one of the actuators of the valve.The shaft is engaged. Should the handle of the actuator turn if the actuator is not on the valve? I have a 24v .5amp power supply with the common connected to the black and connect the other end of the power supply to the red or the white of the actuator. I can hear the motor but the handle does not turn. Should it be turning? If so, any thing else i can check