Troubleshooting (continued)
Mechanical or Material Output Problems
Problem Possible Cause Corrective Action
No fluid being
dispensed
Pressure too low If dispensing thicker materials, try increasing output air pressure
slightly.
Vacuum too high Reduce the vacuum setting.
Safety clip closed Ensure that the barrel adapter safety clip is not clamped shut.
Inconsistent output Dispensing tip or
barrel clogged, or
material contaminated
Check the dispensing tip, barrel, and material for possible
contamination or clogs.
NOTE: Dispensing system components are disposable. Do not
attempt to reuse.
Fluctuating factory air
supply
Check the factory air supply for pressure fluctuations and correct
as necessary.
Trapped air in the
fluid path
Air bubbles in the fluid path and entrapped air within the fluid can
cause inconsistency. For the best dispensing results, remove all
entrapped air before dispensing by purging the tip.
Vacuum too high Reduce the vacuum setting.
Safety clip closed Ensure that the barrel adapter safety clip is not clamped shut.
Material suck-back Dispensing without a
piston
Always use an appropriate piston to prevent material from being
drawn back into the dispenser. For thick- to medium-viscosity
fluids, use EFD SmoothFlow pistons. For thin, low-viscosity
fluids, use EFD LVBarrier pistons.
Another option is to use a syringe barrel adapter with a filter trap.
Refer to “Quicksilver Adapter Assembly” on page48.
UltimusPlus Series Dispensers
52 www.nordsonefd.com info@nordsonefd.com +1-401-431-7000 Sales and service of Nordson EFD dispensing systems are available worldwide.
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