This site is now in read-only archive mode. Please move all discussion, and create a new account at the new Victron Community site.
https://www.victronenergy.com/live/ve.bus:ve.bus_error_codes#error_3_-_not_all_or_more_than_the_expected_devices_were_found_in_the_system
Looks like it is either improperly configured or there is a device conflict. Check to make sure you have all data cables correctly wired. You might try unplugging any data cables from the unit (if there are any). If there is a bad cable it will cause a com error.
Additional resources still need to be added for this topic
11 People are following this question.