I've a step ahead of you on the new controller as I just placed an order for two with FSIP We've got several BBB carts here so I knew I would need them eventually, even if it wasn't a bad controller this time around. View Member Profile Find Member's Topics Find Member's Posts abayham ![]() Unfortunately the millipak units are not repairable due to the potting used (that is why they are so heavy), but FSIP could supply you a new control, we may just have to get your faulty unit to program a new controller. If you are getting an OPEN circuit or a SHORT circuit, it pretty much tells you there is a fault component inside the unit. I am guessing about 20K ohms or something like that. The readings should be very close to the same for the F1 and F2 connections. Take an ohm meter and do a resistance check between F1 and B-, F1 and B+.then do the same test from F2 to B- and F2 to B+. A quick check you can try is to disconnect the controller completely. If you reversed the field connections and the problem moved from the reverse to the forward, I think you have a problem with the field transistors inside the controller. It is common for the Field Drivers to fault out in these type of controllers. ![]() ![]() I assume this is an SEM system (Separately Excited Motor). ![]() View Member Profile Find Member's Topics Find Member's Posts lloydsgl
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