hey admin. are the tenants saying that during travel the lift will stop without the car or landings being pushed? if so get the tenants to see if there are any common levels that it always stops on. it could be at these levels that the serial connections are faulty. also if it seems randon that it could be that the lift is losing its fast speed input to the drive it might just do a auto slowdown and stop where it can.also i take it has 2 lifts in the building? if so arent there a control pcb in the cop for the buttons to be encoded. if so change that pcb between lifts and see how you go.are they saying also that both lifts have the same fault?if so maybe the lifts are doing a zone transfer but opening doors when they shouldnt. maybe program the lifts to return the grd floor. just spitballing here.
