So I am new to this and I may be in over my head but I thought that I would give this a try. We have an Otis elevator and it was installed way back in 2014/2015 timeframe. The building has been dormant for about 10 years. When we started powering everything back up, the elevator actually showed what floor it was on and functioned. We ended up powering it all down and leaving it that way. Now I get the battery fault light which I know they are all bad and need to be replaced. I don't have much info on the elevator so I bought a blue tool in hopes that I could get some codes off of it to see why it won't work. I figure with the batteries dying that it lost all it's programming. There is a small memory card that looks like it plugs into the same port that the blue tool does. I figure that has all the original settings. I'm just not sure which direction to go. Thanks in advance for any help.