Liquid ejection apparatus, and control method and computer readable medium storing a program for controlling the same

A control method for controlling a liquid ejection apparatus, wherein the liquid injection apparatus includes:

• a liquid ejection head having a first nozzle array that ejects first liquid supplied from a first liquid containing unit and a second nozzle array that ejects second liquid supplied from a second liquid containing unit;
• a first liquid supply channel which supplies the first liquid inside the first liquid containing unit to the liquid ejection head;
• a second liquid supply channel which supplies the second liquid inside the second liquid containing unit to the liquid ejection head;
• a first pressurization unit which pumps the first liquid to the liquid ejection head through the first liquid supply channel;
• and
• a second pressurization unit which pumps the second liquid to the liquid ejection head through the second liquid supply channel,
• the control method comprising:
• in a case of preparing for detaching the liquid ejection head, controlling the first pressurization unit and the second pressurization unit to stop pumping the first liquid and the second liquid, respectively, and to controlling the liquid ejection head to perform a liquid discharge operation of discharging the first liquid and the second liquid from the first nozzle array and the second nozzle array, respectively;
• and
• controlling amounts of the first liquid and the second liquid discharged from the first nozzle array and the second nozzle array, respectively, in the liquid discharge operation.

A non-transitory computer readable medium storing instruction when executed, causing a liquid ejection apparatus to execute a control method, wherein the liquid ejection apparatus includes:

• a liquid ejection head having a first nozzle array that ejects first liquid supplied from a first liquid containing unit and a second nozzle array that ejects second liquid supplied from a second liquid containing unit;
• a first liquid supply channel which supplies the first liquid inside the first liquid containing unit to the liquid ejection head;
• a second liquid supply channel which supplies the second liquid inside the second liquid containing unit to the liquid ejection head;
• a first pressurization unit which pumps the first liquid to the liquid ejection head through the first liquid supply channel;
• and
• a second pressurization unit which pumps the second liquid to the liquid ejection head through the second liquid supply channel,
• the control method comprising:
• in a case of preparing for detaching the liquid ejection head, controlling the first pressurization unit and the second pressurization unit to stop pumping the first liquid and the second liquid, respectively, and to controlling the liquid ejection head to perform a liquid discharge operation of discharging the first liquid and the second liquid from the first nozzle array and the second nozzle array, respectively;
• and
• controlling amounts of the first liquid and the second liquid discharged from the first nozzle array and the second nozzle array, respectively, in the liquid discharge operation.