Ok. Solved!
Although my CuraEngine's interface is into Repetier-host (not as independent window) with one solely place to change temperatures (Filament tab) and I had changed this setting to 90º and 230º, actually the temperatures the printer went to were 50 and 210 (as seen in Manual Control panel).
My error was that in the tab Slicer of Repetier-host, previous to push the button "Slice with CuraEngine" I didn't change to the new settings through the options "Print Configuration" and "Extruder 1". So the settings sent to the printer were the default ones and not those changed by me.
Uff, I'm not sure about my explanations are clear to you. But I try!!
Anyway, solved with your help that made me search and search through all the possible options.
Thanks a lot.