http://www.hoover.com/CustomerService.aspx
Please find above your customer service link for your manufacturer, there too you can get any manuals, if you wish to know more.
or, translated as... Xtra Large Wash? Xtra Large Load.
XL being international, "Speak" for
Xtra
Large.
That flashing LED, usually indicates a controller failure. If you look inside the inspection hatch, there should be a maintenance sheet, this will allow you to troubleshoot if you wish to DIY. As one still must troubleshoot to isolate the exact problem.
However, I think professionally that it would be more expedient and actually less expensive if you got the unit looked at by a Serviceman.