Rinse aid appears to be leaking
Now, not knowing about the model you mention, I am going to tell you about the same problem I encountered with my dishwasher. We, too, started seeing water on our floor when we were running our "built-in" dishwasher. I checked the water level in the washer and it was not overflowing from being too full. So, I removed the panel at the front bottom of the washer so I could see the workings. First thing I did was to feel around for moisture on connections and other parts. When I got to the bottom of the pump, I did feel moisture. This told me that the pump was leaking. Unfortunately, most manufacturers nowadays use non-metallic metallic components and with mine it was made of plastic. When I removed the pump, I saw a crack in it along a seam (where it is molded together after the internal workings of the pump are in place). The pump turned out to be almost as expensive as a new machine but I was blessed. A friend of my son was remodeling his kitchen and that included a new dishwasher. He gave me his original one (which turned out to be a recently built one by the same manufacturer) and I installed it and haven't had a leak since.
Now, I hope that this does help but as I said, I am not familiar with your free-standing model.
Bosch 24 in....
on Aug 10, 2014