Liquid ejecting apparatus and method of discharging liquid using the same

A liquid ejecting apparatus, comprising:

• a liquid ejecting unit that ejects liquid from a nozzle;
• a pump;
• and
• a controller,
• wherein the liquid ejecting apparatus has
• a supply channel designed to be able to supply the liquid from a liquid supply source to the nozzle,
• a return channel that has ends connected to the supply channel and that forms, together with the supply channel, a circulation channel, and
• a communication channel that is connected to the return channel and that allows communication between an inside of the return channel and an outside,
• wherein the pump is designed to cause fluid in the circulation channel to flow, and
• wherein, in a state in which the return channel communicates with the outside through the communication channel, the controller drives the pump to perform a return-channel replacement operation in which the liquid in the return channel is discharged to the supply channel side.