A communication system including a communication apparatus and at least one server, wherein the communication apparatus includes first transmission means for transmitting error information about an error occurring in the communication apparatus, and wherein the at least one server includes: acquisition means for acquiring the error information; second transmission means for transmitting (S906, S1012), based on the acquired error information, audio notification information for an audio control device for audibly notifying, by the audio control device, a user of the information about the error occurring in the communication apparatus; and third transmission means for transmitting (S906, S1012), based on the error information acquired, screen notification information for a terminal device for notifying the user of the information about the error occurring in the communication apparatus, through a notification screen displayed by the terminal device; characterised in that the communication system additionally comprises: control means configured to perform control based on a priority of each error of the communication apparatus such that, in a case where a plurality of errors is occurring in the communication apparatus, notification information is generated and transmitted for the audio control device and for the terminal device such that information about a first error from among the plurality of errors is audibly notified to the user based on transmitted audio notification information and information about the first error is notified to the user through the notification screen displayed by the terminal device based on transmitted screen notification information, and information about a second error having a priority lower than a priority of the first error from among the plurality of errors is not audibly notified to the user by the audio control device. wherein the communication apparatus includes first transmission means for transmitting error information about an error occurring in the communication apparatus, and wherein the at least one server includes: acquisition means for acquiring the error information; second transmission means for transmitting (S906, S1012), based on the acquired error information, audio notification information for an audio control device for audibly notifying, by the audio control device, a user of the information about the error occurring in the communication apparatus; and third transmission means for transmitting (S906, S1012), based on the error information acquired, screen notification information for a terminal device for notifying the user of the information about the error occurring in the communication apparatus, through a notification screen displayed by the terminal device; characterised in that the communication system additionally comprises: control means configured to perform control based on a priority of each error of the communication apparatus such that, in a case where a plurality of errors is occurring in the communication apparatus, notification information is generated and transmitted for the audio control device and for the terminal device such that information about a first error from among the plurality of errors is audibly notified to the user based on transmitted audio notification information and information about the first error is notified to the user through the notification screen displayed by the terminal device based on transmitted screen notification information, and information about a second error having a priority lower than a priority of the first error from among the plurality of errors is not audibly notified to the user by the audio control device. acquisition means for acquiring the error information; second transmission means for transmitting (S906, S1012), based on the acquired error information, audio notification information for an audio control device for audibly notifying, by the audio control device, a user of the information about the error occurring in the communication apparatus; and third transmission means for transmitting (S906, S1012), based on the error information acquired, screen notification information for a terminal device for notifying the user of the information about the error occurring in the communication apparatus, through a notification screen displayed by the terminal device; characterised in that the communication system additionally comprises: control means configured to perform control based on a priority of each error of the communication apparatus such that, in a case where a plurality of errors is occurring in the communication apparatus, notification information is generated and transmitted for the audio control device and for the terminal device such that information about a first error from among the plurality of errors is audibly notified to the user based on transmitted audio notification information and information about the first error is notified to the user through the notification screen displayed by the terminal device based on transmitted screen notification information, and information about a second error having a priority lower than a priority of the first error from among the plurality of errors is not audibly notified to the user by the audio control device.