We have a 23 stop building with an E311 Duplex. Each floor is secured because the elevators open right into the homeowner's living room. The building is complaining that the elevators will occasionally open on random floors without being called from the hall station or car call. All car and Hall calls are serial linked. We have changed the boards in the car and boards in the hall from floors that have complained. The home owners are complaining that the problem still persists intermittently and have been there since new construction. All of the wiring and line termination boards have been gone through and verified good. Any ideas on what could be causing this issue?
