[. . . ] operating temperature , the product automatically regulates the power by lowering the lighting. [. . . ] - If there is a short-circuit or a very high overload, the dimmer switches itself off. Once the fault has been eliminated, the product is once again operational. The first time it is switched on, pressing the ON or OFF keys controls all the lighting points in the "In One by Legrand" installation. Infrared cell Command keys Communication media PLC => Mains-borne signalling IR => Infrared ID number The dimmer switch: - Using its ON and OFF keys it can simultaneously control a set of products (actors) that have been associated with it during the learn phase(1). To record a light level during the learn phase, step 2 of the "learn scenario" becomes: Press the ON command key which must be associated with the leader Press the + or - command key to set the required lighting level (1) Learn phase: Operation to associate products so that they can be controlled simultaneously from a central point. This association is carried out by applying the learn scenario procedure on page 11. (2) Scenario: Corresponds to the set of products (actors) that are associated with a command key. Step 1: Start the learn phase (on the LEADER) Press the command key that is to be associated with the leader The indicator lamps of all the products go off. [. . . ] Step 1: Start the learn phase (on the LEADER) Press the command key that is to be associated with the leader The indicator lamps of all the products go off. [. . . ]