What the control board is reporting, and which models and series this code applies to. Diagnosis on Miele appliances uses factory service software and procedures.
Power supply fault
Models: KM 7200, KM 7210, KM 7220, KM 7260, KM 7290, KM 7474, KM 7574, KM 7899
Mains fault
Models: KMDA 7474, KMDA 7633, KMDA 7634, KMDA 7774
A fault code identifies what the control detected, not which part failed. A sensor error can be the sensor, the harness, the connector, or the board reading it. ServiceON is a factory-authorized Miele service provider.