Printing apparatus, printing system, and control method

A printing system comprising:

• a printing apparatus including an attachment unit for attaching a liquid pack storing a liquid, a liquid tank configured to store a liquid supplied from the liquid pack attached in the attachment unit, a print head configured to eject the liquid onto a print medium, using the liquid supplied from the liquid tank, a first obtaining unit configured to obtain a remaining amount of liquid in the liquid tank, a second obtaining unit configured to obtain a remaining amount of liquid in the liquid pack, and a notification unit configured to notify information about replacement of the liquid pack;
• and
• a portable device, wherein
• the printing apparatus includes a control unit configured to derive a period during which replacement of the liquid pack is recommended, upon receipt of a print job, based on the received print job, and to send the period to the device,
• the device includes
• a receiving unit configured to receive the period, and
• a device notification unit configured to notify the period.

A control method for a printing apparatus including

• an attachment unit for attaching a liquid pack storing a liquid,
• a liquid tank configured to store a liquid supplied from the liquid pack attached in the attachment unit,
• a print head configured to eject the liquid onto a print medium, using the liquid supplied from the liquid tank, and
• a notification unit configured to notify information about replacement of the liquid pack,
• the method comprising:
• obtaining a remaining amount of liquid in the liquid tank;
• obtaining a remaining amount of liquid in the liquid pack;
• and
• deriving a period during which replacement of the liquid pack is recommended, upon receipt of a print job, and causing the notification unit to notify the period.