They're two type of SEW motor, DT and DRE. DT old style motor has a round fan cover and DRE new style motor has a hexagonal fan cover. Checking the rectifier DT motor (white and red) wire reads 173 ohms, on a DRE motor reads 138 ohms. Between red and blue wires DT motor reads 518 ohms and DRE motor reads 660 ohms. If one or the other coil resistance reading is not correct, need to replace both rectifier and brake coil. If reading are good, since we know the rectifier has an input and no output the rectifier needs to be replace.
6 сен 2024
