What does 4 mean?

The main control board and the IPM are not communicating. This could be due to wiring issues or a problem with one of the boards.

• Faulty wiring or wiring connections
• Damaged IPM
• Damaged main control board

Click steps to track your progress.

1. 1

   Check wiring and connections at the PCB (CN34) and IPM (CN2).

2. 2

   Verify the correct voltage is present at the IPM CN2 connection.

3. 3

   If connections are good and voltage is correct, replace the IPM.

4. 4

   If communication voltage is incorrect, replace the PCB.