tax 50 04 659 fault

Hey guys. Seems like I'm spending a lot of time on here these days. Had a bad igbt and regen board replaced both. Now getting 659 fault. Contacted ITS and they do not know know what the 659 fault is? Waiting to here back from them. Any ideas?

Is your bus voltage above 700v. Any AC on your bus voltage. Check your (3) 50 ohm charging resistors. Does the fault occur right away, or does it show up when your try to run?