Muller Martini Merit S - Tree Knife trimmer - 122 set motor not positioned

[nqhung78hg]

Dear
I have a Muller Martini Merit S - Tree Knife trimmer with Error: 122 set motor not positioned.
But I can not reset. Pls help me to resolve this error.
Thanks

 

[abed]

How to fix 122 error set motor not positioned