Unlike the much higher priced e-flight retracts, the Dynam retracts sold by us at Grayson Hobby don’t use an actual position individual micro controller to locate the sleds position, rather it has a time encoder and end point switches. The Dynam retracts don’t know if they are up or down until the circuit times and one of the switches is tripped, then it knows where the sled is. That position can be interrupted by changing it direction (flipping the switch mid way through a cycle) and now it waits for the opposite switch to trip. If it cannot make it from switch to switch within a set parameter then the cycle fails and the motor stops. For this reason, when you first power the system, it can take upwards of 30 seconds, uninterrupted, switch flipping seconds to find the sled and sync. So Please allow ample time for the retracts to sync and this should solve your problem.
Hoe do you install or remove the strut on the dynam retract….?