Remove bean shoot and container from top rear of the unit,,remove as many beans as poss before you do this... once removed if you look inside you will see the grinder on back left side big silver cog like thing with a jub clip around the top of it worm gear on front to motor arm...hoover the top of this out ,remove and debris..right grab a can of wd40..if you look inside to the front lft side you will see a black threaded pipe with a white cog ,located behind a gray and blue bunch of wires,,,give the thread of this a spray with wd40 up and down ,,just a bit dont soak it...then turn rijo 42 back on dont put hands in while on...it should then go threw motion,,you might get error again turn power off and wait 2mins,,turn on and start up again...error gone rebuild unit ,,remove milk and choc container and do a no4 brewer clean before use...this works ive done mine twice in 6 years...if you req pics i can send takes aprox 20 to 30 mins to clean and do this ..the track of cog on brewer gets dry and mucky wd40 works great...follow above steps with power off at mains....hope this helps folks
John moth
April 2023