Patent ID: 8983798
Filing Date: 2015-03-17
Classification: G05B

Abstract:
1. A home appliance, comprising: a selector to receive a command for execution of a fault diagnosis; a memory that stores product information of the home appliance for the fault diagnosis; a main controller that, upon receipt of the command through the selector, implements a mode for diagnosing the home appliance; an encoder that, while the mode for diagnosing is being implemented, defines a symbol time and frequencies constituting frequency signals, and encodes the product information to generate a digital signal consisting of symbols which constitute the product information; a modulator that converts the symbols into frequency signals according to the digital signal, each of the frequency signals having any one of defined frequencies which are different from each other, each of the defined frequencies being associated with one of the symbols having different data values from each other, each of the frequency signals having an output duration of the symbol time; and a sound output device that outputs sound signals according to the frequency signals, wherein each of the sound signals has a frequency corresponding to one of the frequency signals and is output for the symbol time, wherein the main controller, when the command is re-input through the selector, controls the encoder to execute at least one of increasing the symbol time or changing at least one of the frequencies constituting the frequency signals.