HP Designjet 9000s Printer series - Manual (Page 85)

CAUTION The printer has an internal clock which allows it to wash the printheads
automatically, flushing some ink through the printhead, which keeps the printheads in good
condition. This is done after the first 20 hours without printing and every 3 days. If the printer is
switched off for a long period, this process does not happen. If the ink does not flow through
the printheads from time to time, the ink will dry inside the nozzles, reaching a point where it is
impossible to recover them and the printhead will fail. If the printer must be switched off for a
long period of time, the customer must use either the optional HP Ink System Cleaning Kit or
the HP 790 Storage Kit to recover or protect the printheads.
Automatic maintenance and cleaning will not be performed even if you turn off the printer at
the front panel. The printer power switch at the rear of the printer should be used only when
the printer is turned off to move it, to connect it to a computer, or to install or maintain printer
parts.
Have available the HP 790 Ink System Storage Kit. Six ink system storage liquid cartridges and six ink
system purging cartridges are packed together in the storage kit.
Have available an empty waste ink bottle.
Ink system storage
This procedure allows you to empty the ink system of ink and fills it with storage liquid that will preserve
the ink system if you do not intend to use the printer for a period of time (two to four weeks).
CAUTION Do not open or close the rear covers or change the position of levers while the ink
system storage process is being performed, or the operation may have to be restarted from
the beginning. This will result in the waste of the storage liquid. If ink system storage has to be
restarted, new storage liquid cartridges will be needed.
1. Press the ONLINE key.
2. Press the SHIFT key to display the PH.MAIN menu.
3. Press the ▲ key to select the PH.MAIN menu and press OK.
4. Press the ▲ or ▼ keys to select the STORE INK SYS option and press OK.
5. When the front panel displays the waste ink bottle warning message, check whether the waste ink
bottle is present and make sure it is empty.
CAUTION This process will produce over 3 liters of waste liquid so the waste ink bottle
must be empty.
6. Press the OK key once the waste ink bottle has been checked.
7. Follow the instructions on the printer front panel that will guide you through each step of the
process.
When the front panel refers to PURGING CAR, install or remove an HP 790 Ink System Purging
Cartridge that came with your HP 790 Ink System Storage Kit.
ENWW Leave the printer off for two to four weeks 75
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