We have a 180 V dc permanent magnet motor.
When engaging the control board while the motor is hooked up. The output to motor drops out and reads no voltage. If I take the motor leads off the board and fire the controller the outputs will read 180 V just like it's supposed too. So when the motor is hooked up to the board we get 0 V, when it's not we get the 180 V that is intended. We have tried switching out the board and also the motor and still get the same outcome.This current setup has ran perfectly fine for the last 20 years. Three days ago this problem occurred. The wires from the board going to the motor are fine. Nothing has changed as this is not a new setup.