Method of operation of a home-automation installation

An actuator (ACT) supplied with an AC electric voltage, intended to drive a movable element (LD) equipping a building in a first direction when the AC electric voltage is applied between a neutral conductor (AC-N) and a first phase conductor (COND1) and in a second direction when the AC electric voltage is applied between the neutral conductor (AC-N) and a second phase conductor (COND2) and comprising a monophase induction motor (MOT) with permanent capacitor (CM), the capacitor being linked to each non-common end of two windings (W1, W2) of the motor (MOT), these windings moreover comprising a common end (P0), and at least one first (rI1) and one second (rI2) controlled switch, wherein the first controlled switch (rI1) makes it possible to link the first phase conductor (COND1) to the common end (P0) of the windings (W1, W2) and wherein the second controlled switch (rI2) makes it possible to link the second phase conductor (COND2) to the common end (P0) of the windings (W1, W2).

A control unit (RCU) comprising a first terminal intended to be linked to a first phase conductor (COND1) of an actuator (ACT), a second terminal intended to be linked to a second phase conductor (COND2) of the actuator (ACT), a third terminal intended to be linked to the phase of an AC supply voltage, two switches (rI11, rI12) disposed respectively on a conductor linking the first terminal to the third terminal and on a conductor linking the second terminal to the third terminal, which comprises a means (CTL) of detecting the existence of a direct contact between the first terminal and the second terminal.