Troubleshooting Possible Problems In Operation - DeVilbiss Tekna Pro Lite PRO-470 Boletín Técnico

Troubleshooting Possible Problems
in Operation
CONDITION CAUSE
Horn holes plugged.
Heavy top or
bottom pattern
Obstruction on top or bottom
of fluid nozzle.
Cap and/or nozzle seat dirty.
Left or right side horn holes plugged.
Heavy right
or left side
Dirt on left or right side of
pattern
fluid nozzle.
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 center hole opening;
remove by washing with solvent.
2. If the defect is not inverted, it is on the fluid nozzle. Clean nozzle. Check for a fine burr on the edge of the fluid
nozzle. Remove with #600 wet or dry sandpaper.
Spreader adjustment valve set
Heavy centre
too low.
pattern
Atomising pressure too low.
Material too thick.
Split spray pattern Atomisation air pressure too high.
Fluid adjusting knob turned in
too far.
Spreader adjusting valve set too high.
Jerky or fluttering spray *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.
Spreader valve not seating properly.
Unable to get round spray
Air cap retaining ring loose.
No air pressure at gun.
Will not spray
Fluid adjusting knob not
open enough.
Fluid too heavy for gravity feed.
Fluid nozzle not tight.
Paint bubbles in cup
Fluid leaking or dripping Cup lid loose.
from cup lid Dirty cup or lid.
Cracked cup or lid.
Inadequate material flow.
Starved spray pattern
Low atomisation air pressure.
Too much atomisation air pressure.
Excessive overspray
Gun too far from work surface.
Improper stroking (arcing, gun motion
too fast).
Too much or too-fast-drying thinner.
Excessive fog
Too much atomisation air pressure.
Air pressure too high.
Dry spray
Gun too far from work surface.
Gun motion too fast.
Gun out of adjustment.
Packing nut loose.
Fluid leaking from
packing nut
Packing worn.
CONDITION CAUSE
*Most common problem.
CORRECTION
Clean. Ream with non-metallic point.
Clean.
Clean
Clean. Ream with non-metallic point.
Clean.
Turn out counter clockwise to achieve
proper pattern.
Increase pressure.
Thin to proper consistency.
Reduce at regulator or gun handle.
Turn out counter clockwise to achieve
proper pattern.
Turn in clockwise to achieve proper
pattern.
Tighten or replace.
Tighten or replace cup.
Refill.
Hold more upright.
Back flush with solvent.
Tighten.
Replace.
Clean or replace.
Tighten.
Check air supply and air lines, blow out
gun air passages.
Turn out counter clockwise.
Thin material and/or change to larger
fluid nozzle size.
Tighten to 18–20 Nm (13–15 ft-lbs).
Push in or replace.
Clean.
Replace cup and lid.
Back fluid adjusting knob out or change
to larger fluid nozzle size.
Increase air pressure and
rebalance gun.
Reduce pressure.
Adjust to proper distance.
Move at moderate pace, parallel to work
surface.
Remix properly.
Reduce pressure.
Reduce air pressure.
Adjust to proper distance.
Slow down.
Adjust.
Tighten.
Replace.
CORRECTION
TB-1020
13