Network Error Codes are displayed when an error occurs in the network. You can check the action to take as well as a description of the error by referring to the code in the error code list.
Use Web Connection to configure so that network error codes are displayed. For details, refer to Here.
Depending on the sending or receiving conditions, an error dialog may not appear. If you cannot successfully send or receive data, select [Job List] - [Details] to check the network error code.