It sounds like a LDW problem. If you take the car to the mid point of the hoistway and open the brake carefully with the motor leads removed, the car should balance at 50%. It needs to be within 1 counter weight of balance. After a run you should be within 5%. hoist ropes out of tension can also throw you off. This fault can also be caused by the Brake dragging on the Sheave and heating it up over a period of time, causing the speed reference to throw a 108. Also a bad tach or tach connection can cause it.
