A method for initializing an appliance in a delivery state, wherein the appliance has at least one adjustable output value, the method comprising the following steps: providing a control unit connected to a memory unit and providing a variable control mechanism , wherein the variable control mechanism is user adjustable for controlling the adjustable output value and wherein the appliance is in the delivery state until a user adjusts the variable control mechanism; storing a first code word in the memory unit, wherein a predetermined delivery output value of the appliance is associated to the first code word and the first code word is indicating that the appliance is in the delivery state, characterized in that: the variable control mechanism comprises a user adjusting element which is user adjustable, and a potentiometer for converting a setting adjusted at the user adjusting element to an adjusted value, sensing, by the control unit, the adjusted value that is supplied by the potentiometer, comparing, by the control unit, the adjusted value to a trim setting , the trim setting being a setting of the variable control mechanism in the delivery state and the trim setting being stored in the memory unit; and changing, by the control unit, the first code word to a second code word when the variable control mechanism is adjusted by the user and when a relation of the adjusted value and the trim setting fulfills a predetermined condition, the second code word is indicating that the appliance is not in the delivery state. providing a control unit connected to a memory unit and providing a variable control mechanism , wherein the variable control mechanism is user adjustable for controlling the adjustable output value and wherein the appliance is in the delivery state until a user adjusts the variable control mechanism; storing a first code word in the memory unit, wherein a predetermined delivery output value of the appliance is associated to the first code word and the first code word is indicating that the appliance is in the delivery state, characterized in that: the variable control mechanism comprises a user adjusting element which is user adjustable, and a potentiometer for converting a setting adjusted at the user adjusting element to an adjusted value, sensing, by the control unit, the adjusted value that is supplied by the potentiometer, comparing, by the control unit, the adjusted value to a trim setting , the trim setting being a setting of the variable control mechanism in the delivery state and the trim setting being stored in the memory unit; and changing, by the control unit, the first code word to a second code word when the variable control mechanism is adjusted by the user and when a relation of the adjusted value and the trim setting fulfills a predetermined condition, the second code word is indicating that the appliance is not in the delivery state. the variable control mechanism comprises a user adjusting element which is user adjustable, and a potentiometer for converting a setting adjusted at the user adjusting element to an adjusted value, sensing, by the control unit, the adjusted value that is supplied by the potentiometer, comparing, by the control unit, the adjusted value to a trim setting , the trim setting being a setting of the variable control mechanism in the delivery state and the trim setting being stored in the memory unit; and changing, by the control unit, the first code word to a second code word when the variable control mechanism is adjusted by the user and when a relation of the adjusted value and the trim setting fulfills a predetermined condition, the second code word is indicating that the appliance is not in the delivery state. <EOS>