| 摘要 |
A washing and/or drying appliance (100) is proposed. The washing and/or drying appliance (100) has a circuit system (200) comprising: an electric load (205) adapted to be energized by electrical coupling between first (TL) and second (TN) supply terminals of an electric power supply; first (SWL) and second (SWN2) switching elements operable between respective closed/opened states for coupling/decoupling the first (TL) and second (TN) power supply terminals to/from first (T1) and second (T2,205) load terminals of the electric load (205); a control unit (215) for operating the first (SWL) and second (SWN1,SWN2) switching elements, and a conditioning arrangement (D1,2201,R1A-R1C). The conditioning arrangement (D1,2201,R1A-R1C) has a unidirectional signal flow element (D1) coupled between the first supply terminal (TL) for receiving a supply signal (VSUPPLY) and the second load terminal (T2,205), and an impedance arrangement (220I,RIA-RIC) coupled between the first load terminal (T1) and the control unit (215). With the first (SWL) and second (SWN2) switching elements in the opened-states the first supply terminal (TL), the unidirectional signal flow element (Di), the electric load (205) and the impedance arrangement (2201,R1A-R1C) define a conductive path providing a check signal (S1) to the control unit (215), the control unit (215) being configured for determining a fault in the circuit system (200) based on the check signal (S1). |
