Lights 1, 2 & 5 lit mean "E3 problem" and the manual just states to contact the after-sales service.  This happened to us once and after we ordered new element, (which we thought was causing problem) still did not work.  Called after-sales and he seemed to press a reset button and this fixed problem.  However, unable to remember where this reset button is - hope this helps some.  If we find out where it is, will let you know!
                 Mary Wilson
                
 March 2008