Good day, We have one oven model CSMU0612RAE-AZ, S.No. 81.848.755, Ver RA and we have a problem: after 20 sec in conv and comb mode the error 8 appear; we checked fuse, replaced power supply board, CPU board, relay board, but still wegot the same problem. I have a copy of all settings (1 to 10/11) and of all tests (0 to 29) and I can send you to guide us. We are onboard of one MPSV vessel. Offshore NIGERIA. Many thanks! Daniel/ETO