HP LaserJet Pro 400 color Printer M451 series - Manual (Page 169)

If you believe you purchased an HP supply, go to www.hp.com/go/anticounterfeit . Service or repairs
that are required as a result of using unsupported supplies is not covered under HP warranty.
Used <color> in use
Description
You are using a print cartridge that reached the default low threshold while it was installed in a
product.
Recommended action
Prining can continue, but consider having a replacement supply on hand.
Used <color> installed Press [OK] to continue
Description
You have installed a print cartridge that reached the default low threshold while it was installed in
another product.
Recommended action
Press the OK button to continue.
Used supplies in use
Description
You are using more than one print cartridge that reached the default low threshold while it was
installed in a product.
Recommended action
Printing can continue, but consider having replacement supplies on hand.
Yellow cartridge low
Description
The print cartridge is nearing the end of its useful life.
Recommended action
Printing can continue, but consider having a replacement supply on hand.
Yellow in wrong position
Description
The print cartridge is installed in the incorrect slot.
ENWW Interpret control panel messages 151