HP designjet l65500 Manuale Di Servizio

188

Troubleshooting

d.

If the empty intermediate tank remains empty, swap both intermediate tank, and run the same 

test as 2, selecting this time the other air pressure pump. All the other intermediate tanks must 

be connected. 

e.

Let the air pressurized for 5 minutes, and stop the test. Switch off the printer. Is there ink within 

the intermediate tank? If yes, the 4 way-valves must be replaced. 

f.

If not, the 4 way-valve seems to work. Then go to the next step to check the main ink electro-

valve. 

g.

In any case swap back again the intermediate tank. 

2.

Make sure that all cartridges are correctly connected, check that the main electro-valve is working by 

using the entry from diagnostic ‘4.6 ISS Electro valves’, selecting the main electro-valve to test, and 

once selected, check that there is the click/click noise when opening/closing the electro-valve. If 

there is no noise, hit the body of the electro-valve with a pen while running the test. 

3.

Air bubbles in the tubes from the ink cartridges: It is important that thee are no air bubbles in the 

tubes, between an ink cartridge and the main electro-valve, if there are bubbles this a major cause 

on an empty intermediate tank when using the printer 

a.

Make sure that the main electro-valve is not open (not running any specific test) 

b.

Disconnect the ink cartridge and install one purge bag in the color of intermediate tank that 

will not fill. 

c.

Insert a clean syringe into the ink cartridge and fill it with 30 cc of ink for the color selected. 

d.

Insert the syringe in the purging port (next to the ink pressure sensor) for the color selected, and 

slowly push the ink until it clearly reaches the quick connector purger and the purge bags. If 

there is an air bubble inside the syringe, do not push it into the tubes. WARNING! Never look 

away from the syringe. If you need to look at the purge bags or something else in the room, set 

down the syringe first. The ink system components are easily broken. 

TIP: Make sure to insert the syringe far enough into the port. In order to insert the ink correctly, the 

tip of the syringe must engage a small spring inside the port. 

e.

Disconnect the purge bag and connect the ink cartridge. 

4.

In case of 'unexpected empty intermediate tank' and at the same time the printer marks the cartridge 

of the same color as empty (while ink remains), refer to the section 'What to if the printer incorrectly 

displays that an ink cartridge is empty  see page 190.

5.

Once the troubleshooting above has been completed, check that all the air tubes are correctly con-

nected, refill the empty intermediate tank. 

If you apply too much force to the syringe, you may damage the ink system. If there seems 

to be too much resistance, stop pushing the ink with the syringe and try to identify possible problems.