HP DesignJet 2500CP Service Manual page 159

PQ Problem:
Printheads Affected:
Problem Description: 1 Printer fails to stop printing when Printheads
Cause of Problem:
Corrective Action:
Print Quality
Printer Not Detecting Out Of Ink Properly
All
out of ink, wasting media, possibly for several
plots. 2 Printer reports out of ink as Printhead
Failure message.
Out of Ink is determined when the following
conditions are true:
1 Ink Level indicator shows low AND
2 Six or more nozzles are missing in a Printhead
Check OR
3 The temperature of the printhead rises to 15
degrees above its normal operating
temperature.
If the ink level indicator is not showing low, (2) or
(3) will result in a Printhead Failure message.
The Printhead Check usually does a more reliable job
of checking for Out of Ink conditions. Setting the
printhead check to more frequent use will reduce the
amount of wasted media and ink. This is especially
recommended if the printer is being used unattended.
The printhead check does take about a minute and a
half to perform, and uses a thin strip of media.
HP DesignJet CP Series Printers 6-23