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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 Cleaning Kit.
When the front panel refers to CL CARTRIDGE, install or remove an HP 790 Ink System Cleaning
Liquid Cartridge that came with your HP 790 Ink System Cleaning Kit.
8. The extraction process starts and you need to recheck whether the waste ink bottle is present and
is not full. Press the OK key once the waste ink bottle has been checked.
Once the cleaning ink system process has been completed, the front panel will return to the PH.
MAIN menu.
After cleaning the ink system, the ink system needs to be charged (see
Charge the ink system after
cleaning the ink system).
Charge the ink system
When the printer is left for a long time and you need to clean the ink system, then you will need to
charge the ink system with ink. You will need ink cartridges with more than 250 cc of ink available.
If any of the ink cartridges contain less than 250 cc of ink, or if an ink system purging cartridge has been
installed, a warning message is displayed on the front panel. Install a correct ink cartridge that contains
more than 250 cc of ink in the indicated slot in order to continue.
To charge the ink system:
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.
4. Select the CHARGE 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 is not full. Check the waste ink bottle and press the OK key.
6. The charge process starts. Check whether the waste ink bottle is present and is not full. Check the
waste ink bottle and press the OK key.
When the ink charge process is complete, the front panel displays the Ink Charge option.
Clean the exterior of the printer
CAUTION Wipe the printer clean with a soft cloth. A cloth moistened with a neutral detergent
may be used. Do not allow liquid to enter the printer. This may create risk of fire and electrical
shock and cause a malfunction. Do not clean the printer with benzene or paint thinner. This
may damage the paint.
ENWW Charge the ink system 77