Had 2 calls at different floors the elevator shut down level with floor doors closed. Now will not run on car top inspection, tries 3 times and shuts down and needs to be reset. Brake not lifting LB may be the problem, 120vac on A1 of LB contactor A2 goes through LVIB device and C/UDX to HL1 not sure what LVIB and C/UDX are. Not much info but I will be connecting tool tomorrow.