IROBOT Roomba i7 secret codes and hidden features - HardReset.info
Charging error 3 fix on my $50 Roomba 560 - YouTube
Roomba j7+ I have just gotten error 30 this morning and worked fine then at 9PM it's happened 3 times and I've emptied the bin, cleaned the sensors. 90Seconds later it appeared.
Roomba Charging Error 3? (Just Do This Now) - Homespoiler