Are your lock's ECI? Also it must say the floor it logged the faults on. As for going to bottom floor, it is recalibrating its position. If you can determine the floor, check or change the lock beak. I would check vane clearance also. Another common issue is the aux contacts on your main contactor. If you main contactor is the 130amp you may want to change it to the 220amp, to save future issues.