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HP Recommended
DesignJet Z6600
Microsoft Windows 10 (64-bit)

Full set of new printheads installed and Errors 28.4:01 and 28.6:01 popped up.

1 REPLY 1
HP Recommended

According to troubleshooting documents this is a warning that the printhead installed is out of warranty and image quality may deteriorate.

28:4:01 is cyan/light magenta

28:6:01 is photo black/light grey.

 

Check the expiry dates on the printheads you just installed. 

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