I managed a ranch that had 34 (+2 spares) of those Spin Cast control units that were made from late 80's to that model you have there. You always had to remember to turn the dang things off so they would work IIRC. When I would run the thru the ranch to adjust feeding times I would always have one that was not throwing corn after I left
I can only remember having to take back a couple for repairs in 7 yrs. They were very reliable. Clocks would fade out in the heat IIRC was the only issue and maybe one board went bad.