Not always. It just denotes that something is sent to the log system with a more important status code than simple info.
E.g. info about somebody login in with root privileges is mentionable although it is not an error. Logging that as error makes sure that even when the links filtered to show only errors, that piece of information gets shown.
The only real error there might be the radio antenna/distance lines, but if everything works, no need to get worried.