Troubleshooting Possible Problems In Operation - DeVilbiss GTI PRO LITE Operation Manual

Troubleshooting Possible Problems in Operation

CONDITION
Heavy top
or
bottom pattern
Heavy right
or
left side pattern
Remedies for the top-heavy, bottom-heavy, right-heavy, and left-heavy patterns:
1. Determine if the obstruction is on the air cap or the fluid nozzle. Do this by making a test spray pattern. Then,
rotate the cap one-half turn and spray another pattern. If the defect is inverted, obstruction is on the air cap.
Clean the air cap as previously instructed. Also check for dried paint just inside the cap centre hole opening;
remove by washing with solvent.
2. If the defect is not inverted, it is on the fluid nozzle. Clean nozzle. If problem persists, renew nozzle.
Heavy centre
pattern
Split spray
pattern
Jerky or fluttering spray
CAUSE
Horn holes plugged.
Obstruction on top or bottom of
fluid nozzle.
Cap and/or nozzle seat dirty.
Left or right side horn holes
plugged.
Dirt on left or right side of fluid
nozzle.
Spreader adjustment valve set
too low.
Atomising pressure too low.
Material too thick.
Air pressure too high.
Fluid adjusting knob turned in too
far.
Spreader adjusting valve set too
high.
Loose or damaged fluid
nozzle/seat
Loose or broken cup fluid nipple
Material level too low
Container tipped too far
Obstruction in fluid passage
Loose fluid needle packing nut
Damaged fluid needle packing
14
CORRECTION
Clean. Ream with non-metallic
point.
Clean.
Clean.
Clean. Ream with non-
metallicpoint.
Clean.
Turn out counter clockwise to
achieve correct pattern.
Increase pressure.
Thin to correct consistency
Reduce at regulator or gun handle.
Turn out counter clockwise to
achieve correct pattern.
Turn in clockwise to achieve
correct pattern.
Tighten or replace
Tighten or replace cup
Refill
Hold more upright
Back flush with solvent
Tighten
Replace