Hello,
You have a third party plugin that is not coded properly and is over-writing font awesome calls:
http://www.dalbysport.dk/Dalbysport/index.php?option=com_ajax&plugin=arktypography&format=jsonIt's adding the following css to the page, and it is wrong:
span.icon-print::before, span.icon-printer::before {
content: "";
}
You need to disable that plugin for it to show properly.