E02 fault in ABB DCS800 drive indicates SDCS-CON-4 ROM memory test error. This means a ROM memory test error with the SDCS-CON-4 control board, suggesting that the control board’s ROM may be faulty or corrupted. This issue can prevent the drive from operating correctly, and it often requires specific attention.

Here’s a troubleshooting approach for this fault:

1. Power Cycle the Drive:

   • As with most faults, start by fully powering down the drive, wait a few minutes, then power it back on. This may help clear temporary memory-related issues.

2. Check for Loose Connections:

   • Verify that all connections to the SDCS-CON-4 control board are secure. Loose connections can sometimes cause intermittent issues that trigger memory errors.