Flow printer dome fan not operating

Problem description:

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

Cause:

Supplier error, interchanged cables.

Identification:

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

Solution:

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

Other:

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