Image forming system including drying device that dries ink

An image forming system comprising:

• an image forming apparatus that forms an image on a sheet, by ejecting ink onto the sheet;
• a drying device that dries the ink ejected by the image forming apparatus onto the sheet;
• and
• a display apparatus,
• the image forming apparatus including:
• a first casing;
• a first transport device located inside the first casing, and configured to transport the sheet;
• an image forming device opposed to the first transport device inside the first casing, and configured to eject the ink onto the sheet;
• and
• a first control device including a first processor,
• wherein, when the first processor executes a first control program, the first control device functions as a first controller,
• the drying device including:
• a second casing;
• a second transport device located inside the second casing, and configured to transport the sheet;
• a heater unit located inside the second casing, and including a heat source that heats the ink ejected onto the sheet;
• a moving mechanism located inside the second casing, and configured to move the heater unit between a first position opposite the second transport device and in a proximity thereof, and a second position more distant from the second transport device than the first position;
• a cover that covers the heater unit;
• and
• a second control device including a second processor,
• wherein, when the second processor executes a second control program, the second control device functions as a second controller,
• the display apparatus including:
• a display device;
• and
• a third control device including a third processor,
• wherein, when the third processor executes a third control program, the third control device functions as a third controller,
• wherein the image forming apparatus and the drying device include a plurality of sensors respectively provided at a plurality of sensor positions located along a transport route on which the sheet is transported, at positions respectively corresponding to a plurality of jam detection positions on the transport route, and each configured to detect jam that occurs at the jam detection position,
• the plurality of jam detection positions include the jam detection position corresponding to the heater unit,
• upon deciding that the plurality of jam detection positions include one or more jam detection positions where the jam has occurred, and that the jam detection positions where the jam has occurred include the jam detection position corresponding to the heater unit, on a basis of a sensing result of each of the sensors, the first controller of the image forming apparatus:
• instructs the second controller of the drying device to move the heater unit from the first position to the second position;
• transmits jam removal preparation information, indicating that the heater unit is moving from the first position to the second position, as preparation for removing the jam that has occurred at the jam detection position corresponding to the heater unit, to the third controller of the display apparatus;
• and
• transmits jam occurrence status information, indicating jam occurrence status of all the jam detection positions where the jam has occurred, to the third controller of the display apparatus,
• the second controller of the drying device causes the moving mechanism to move the heater unit from the first position to the second position, in accordance with the instruction, and
• the third controller of the display apparatus is configured to:
• cause the display device to display a message indicating that jam removal is under preparation, according to the jam removal preparation information;
• and
• cause the display device to erase the message indicating that the jam removal is under preparation, when the heater unit reaches the second position, and display jammed position information including all the jam detection positions where the jam has occurred, on a basis of the jam occurrence status information.