Original Operation Manual
12-3
•1307_PU280_SV1018DV1020_BAoDB_en•ski
en
Malfunctions and Troubleshooting
12.2 Troubleshooting on the spray gun
Fault
Possible cause
Remedy
1. The valve rod does not trigger.
➤
No air pressure available.
➤
Insufficient air pressure available.
➤
Rear sealing nut excessively
tightened.
➤
Connect the air supply and open
the air valve.
➤
Set the air pressure to 5,5-9 bar.
➤
Slightly loosen the nut.
2. Spray fog on round jet nozzle,
even though the trigger has not
be actuated.
➤
Screws on front plate loose.
➤
The rear side of the front plate is
soiled.
➤
Mix module bore worn.
➤
Tighten the screws on the front
plate with a spanner.
➤
Clean the front plate and check
for score marks.
➤
Replace the mix module..
3. Increased overspraying
➤
Excessive air flow to the front
cap.
➤
Material pressure set too high.
➤
Reduce the air flow with the
regulator.
➤
Reduce the material pressure.
4. Round spray pattern forms “fin
-
gers” or is deformed.
➤
The round jet nozzle is soiled or
worn.
➤
Clean the round jet nozzle with an
appropriate drill.
➤
Replace the round jet nozzle.
5. Pressure fluctuations.
➤
Mix module inlets and outlets
soiled or worn.
➤
Viscosity of components not
uniform.
➤
Filter element dirty.
➤
Check valves dirty.
➤
Clean the mix module inlets and
outlets with an appropriate drill or
replace the mix module.
➤
Regulate the material tempera
-
ture accordingly.
➤
Clean or replace the filter ele
-
ments.
➤
Clean or replace the check
valves.
6. Gelated or hardened material in
the air channels to the front cap.
➤
Incorrectly directed material, air
in hoses.
➤
Clean or replace the check
valves.
7. Material emerges from the back
side seal.
➤
Sealing nut loose.
➤
Back side seal worn or damaged.
➤
Slightly tighten the sealing nut.
➤
Replace the backside seal.
8. Rapid build up of material on the
round jet nozzle or the front cap.
➤
Insufficient air flow to the front
cap.
➤
Increase the air flow to the front
cap.
9. Spray gun triggers only very
slowly.
➤
O-rings dry or worn.
➤
Wet the spray gun with spray gun
oil.
➤
Replace and lubricate the O-
rings.
10. Pressure loss on air outlet.
➤
Damaged O-rings on slide valve.
➤
Damaged O-ring on piston.
➤
Replace the O-rings on slide
valve.
➤
Replace the O-rings on piston.
Summary of Contents for DUOMIX PU280
Page 68: ......