HP Officejet Pro X551 Printer series - Manual (Page 93)

Interpret control panel messages for supplies
Non-HP ink cartridges installed
Description
No action necessary, this is a notification only.
Recommended action
Use SETUP Cartridges
Description
The SETUP cartridges have been removed before the product has completed initialization.
Recommended action
Use the SETUP cartridges that came with your product for product initialization.
Do not use SETUP cartridges
Description
SETUP cartridges cannot be used after the device has been initialized.
Recommended action
Remove and install non-SETUP cartridges.
Cartridge Low
Description
The ink cartridge is nearing the end of its useful life.
Recommended action
Printing can continue, but consider having a replacement supply on hand.
Cartridge Very Low
Description
The ink cartridge is near the end of its useful life.
Recommended action
Have a replacement ink cartridge on hand.
ENWW Solve issues with supplies 79