I had this once, same fault subcode and drive. I tried everything I could. Megged the motor numerous times, went over motor wires, redid connections, pulled drive and sent it to Access. There was more im sure, going just off memory here. Ended up explaining to the customer that the drive needed replaced, or they could risk just replacing the board in the drive with the current transformers on it (CO16 board If I remember correctly) but there was a chance the drive could still need replaced.
Once I'd determined the issue was in the drive I quit investing time troubleshooting when calls came in and just took notes and reset it, usually once a week. This went on for awhile because the customer didn't want to spend money and my company gives work away for free and wasn't billing for these callbacks. Eventually they did push billing the customer and the customer had another company quietly come in and replaced the CO16 board I think because all of a sudden it just magically was fixed and never broke again, but the drive still had my handwriting on the side so it wasn't an entire new drive.
Side note, if you have a drive that has blown IGBTs or something simple send it to access and have it rebuilt. If it's a control side issue or intermittent problem, don't send it. Just replace it.
