Hobart Designed Electronically Controlled DWs
The selectra 21 and the 22 series KA DWs all used a more conventional control all in one unit in the control panel, All of these ECDWs were troublesome and are now challenging to repair as parts are all long gone.
There are only 2 or3 that I am aware of still working, we have a KDSS-20 in the museum that still works, this is actually the rarest and IMEO the best one to have if you are actually going to use it as it is the only one with two final rinses.
John L.