A home appliance arranged to transmit product information to a management device via a communication network for fault diagnosis of the home appliance, the home appliance comprising: a selection device arranged to receive input of an external command signal for executing a fault diagnosis; a storage device arranged to store the product information of the home appliance for fault diagnosis; a controller that, upon receipt of the external command signal through the selection device, is arranged to load the product information stored in the storage device and output a control signal including the product information; a conversion device arranged to convert the control signal into an acoustic signal; and an output device arranged to receive the acoustic signal from the conversion device and output a sound corresponding to the acoustic signal characterised in that: the controller is arranged to form the product information into the control signal as a combination of a plurality of symbols having a given size of symbol time, and to generate the control signal wherein the controller is arranged to include a dead time (101, 102) into the control signal at an interval during which a data value of a next symbol is changed, and does not include a dead time at an interval during which a data value of the next symbol is not changed, and to control the conversion device to convert the control signal into the acoustic signal by taking dead times into account. a selection device arranged to receive input of an external command signal for executing a fault diagnosis; a storage device arranged to store the product information of the home appliance for fault diagnosis; a controller that, upon receipt of the external command signal through the selection device, is arranged to load the product information stored in the storage device and output a control signal including the product information; a conversion device arranged to convert the control signal into an acoustic signal; and an output device arranged to receive the acoustic signal from the conversion device and output a sound corresponding to the acoustic signal characterised in that: the controller is arranged to form the product information into the control signal as a combination of a plurality of symbols having a given size of symbol time, and to generate the control signal wherein the controller is arranged to include a dead time (101, 102) into the control signal at an interval during which a data value of a next symbol is changed, and does not include a dead time at an interval during which a data value of the next symbol is not changed, and to control the conversion device to convert the control signal into the acoustic signal by taking dead times into account. the controller is arranged to form the product information into the control signal as a combination of a plurality of symbols having a given size of symbol time, and to generate the control signal wherein the controller is arranged to include a dead time (101, 102) into the control signal at an interval during which a data value of a next symbol is changed, and does not include a dead time at an interval during which a data value of the next symbol is not changed, and to control the conversion device to convert the control signal into the acoustic signal by taking dead times into account.