BestCode Next Series 8 Technical Manual October 2022 Page 194 of 290
Troubleshooting Using the Diagram
Vacuum Issues
When troubleshooting issues with vacuum, we can begin by seeing exactly which components are directly or indirectly
involved with the Vacuum function.
The train of direct parts that work with the vacuum are as follows:
1) The Gutter
2) The Gutter Tube (White)
3) The Gutter Valve
4) The Gutter Venturi Tube (Black/White)
5) The Venturi
Use the Fluidic screen to test Gutter Valve and Vacuum function.
Run the Pump and with gutter valve off, spray cleaner into the gutter, if there is vacuum, the
gutter valve is stuck open and should be replaced.
If the gutter does not return, open the valve and spray cleaner into the gutter, if there is no return,
move to the next test.
From the Fluidic screen, run the pump and open the gutter valve. Remove the tube from the gutter
barb and spray cleaner into the tube. If there is vacuum, the gutter is clogged and should be
soaked and cleaned to resolve the issue, if not, move to the next test.
Cleaning or replace the Venturi: See Here
If this does not resolve it, move to next test.
Test the Gutter tubes. Remove the white tube from the Ink Manifold and from the Gutter. Spray
cleaner through the ensure it freely passes. If it does not, repeat on the Black/White tube from the
Ink Manifold to the Venturi. If this does not, check for clogs inside the Ink Manifold.
Clogs in the white tube are likely in the Gutter detect. Use a small wire to clean it out.
Do not use sharp objects like drills to clean out the Ink Manifold. Soak the component is cleaner
and use thin wire to free up the ports.
The Non-Direct parts that impact vacuum are as follows:
1) The Bleed Valve
2) The Solvent Add Valve
3) Ink Viscosity
Use the Fluidic screen to test Bleed Valve.
Remove the Black tube from the Venturi. Place the black tube over a beaker and run the pump. If
the Tube begins the drip, the bleed valve is not fully closed. This can steal vacuum from the gutter
and prevent it from working correctly.
Use the Fluidic screen to test Solvent Add Valve.
Remove the Orange tube from the Makeup Tank. Run the pump. If the Tube begins the empty, the
Solvent Add valve is not fully closed. This can steal vacuum from the gutter and prevent it from
working correctly.
Test the Ink viscosity. Ink Below 2.0cP and Ink above 8.0cP can prevent the vacuum from working
correctly.
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