you can megger the motor to determin if its good or bad(you should see at least 4 or 5 Meg ohms), beyond that from what I understand the motor and cap came as a package together from the manufacture but never the less I would call them and verify the charge and discharge curv values of the cap needed and make sure thats what you have, to at least eliminat anything wrong there,
by the way what size wire is feeding the motor and whats the distance from the panel? (Im thinking voltage drop issues) dose the motor have the ability to be wired for 120V & 240V if so are we sure its not wired for 120V?
process of elimination Trollog youll get buddy good luck.
