One of my crown sp3020's has a hard plug in reverse. You'll be in forward travel above 2 MPH and try to plug in reverse and as soon as the reverse switch is engaged it will put the lift into a dead stop. Then reverse will not work. You have to key off and on in order to get reverse travel back.
I checked the POT and had a bad spot so I changed it out with a new one and adjusted it accordingly, but had no change in operation. Still plugging hard in reverse.
This all started happening after replacing the MOSFET. I swapped it out with a new GE IGBT Module.
Any Ideas?
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