Brand logo instead brand name

-- url of the page with the problem -- : www.dadatecnologia.com/categorias/Productos/3-aastra-415.html
-- HikaShop version -- : HikaShop Starter 2.3.0
-- Joomla version -- : 3.3.0
-- PHP version -- : 5.3.28
-- Browser(s) name and version -- : Google Chrome Versión 35.0.1916.114 m
-- Error-message(debug-mod must be tuned on) -- : No error

Hi
I want to set the brand logo image instead the brand name in product page, to the right of product image.

Thanks in advance.