Board Combination Fault

What does E.CMB mean?

This fault indicates that the installed circuit board is either incompatible with the specific inverter model or is not correctly seated/connected within the inverter. The inverter will cease operation to prevent potential damage. An incorrect or improperly connected board can lead to system malfunction or inability to perform intended functions.

• Incorrect option board installed that is incompatible with the specific inverter model.
• Option board not fully or correctly seated in its designated slot within the inverter.
• Bent, damaged, or dirty pins on the option board connector or the inverter's slot.
• Firmware incompatibility between the main control board and the newly installed option board.

Click steps to track your progress.

1. 1

   Power cycle the inverter and reseat the suspected option board firmly into its designated slot.

2. 2

   Verify the installed option board's part number against the inverter's manual for compatibility with the specific model.

3. 3

   Inspect the option board connector pins and the inverter's slot for any signs of bending, damage, or foreign material.

4. 4

   If multiple option boards are installed, remove them one by one to isolate the faulty or incompatible board.

5. 5

   Consult the inverter's manual for any required firmware updates if a new option board has been installed.