Ok it's an IGBT module type. I have in our workshop the same problem B11, we've controlled the isolation of the drive motor and found a problem of the stator isolation. If you don't have a megger, I think you can meassure the resistance of each fase to the outside of the motor. (compaire the values with the pumpmotor)
regards
Marcb
This is ONLY to be used to report flooding, spam, advertising and problematic (harassing, abusive or crude) posts.