Hello, I'll start from afar, I have two SWE 120, one started not to lower, sometimes it starts - sometimes it blocks (everything else works), we changed the computer module, it worked for about 6 months and then the same problem. I put the old computer on the other SWE 120 and the problem remained - so I assumed that the problem was in the computer itself. No errors! Until today, I replaced the integrated circuit that controls the lowering valve with a new one (VN820-E - High-side driver) I installed the computer and error 3533 came out. Has anyone encountered the problem? Thanks in advance even for the smallest information. Best regards