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 electronic fault (K9)
Models: KFNF 9959 iDE, K 7122 Ui, K 7162 Ui, K 7182 Ui, K 7202 Ui, K 7242 Ui, KF 7122 Ui, KF 7162 Ui, KF 7182 Ui, KF 7202 Ui, KF 7242 Ui, F 7122 Ui, F 7162 Ui, F 7182 Ui, F 7202 Ui, F 7242 Ui, FN 7122 Ui, FN 7162 Ui, FN 7182 Ui, FN 7202 Ui, FN 7242 Ui
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.