Flow printer dome fan not operating

Problem description:

Flow generation printer’s fan doesn’t operating at all.


Supplier error, interchanged cables.


Please, ask the cutomer, to check according to the attached document, and to send a photo of his fan wireing.  


We offer spare fan to everyone upon fan photo and serial number of printer.


If the user wants to solder it for himself, it does not influence his/her warranty rigths, but our offer is a new fan.