What does 940 mean?

This fault occurs when the Field Analog-to-Digital (A/D) converter reading remains saturated for more than 15 seconds, indicating an issue with the field current feedback circuit.

• Component problem with the Field Interface Board.
• Problem with the Ribbon Cable (J33) connecting components.
• Component problem with the Main Control Board.

Click steps to track your progress.

1. 1

   Replace the Field Interface Board.

2. 2

   Replace the Ribbon Cable (J33).

3. 3

   If the fault is still present after these steps, replace the Main Control Board.