Trilogy
r
Air Spray/LVLP Automatic Spray Guns
11
Part 1601058
−
03
E
2014 Nordson Corporation
Troubleshooting
WARNING:
Allow only qualified personnel to perform the following tasks.
Follow the safety instructions in this document and all other related
documentation.
These troubleshooting procedures cover only the most common problems.
If you cannot solve a problem with the information given here, contact your
local Nordson representative for help. See Figure 5 for parts information.
Problem
Possible Cause
Corrective Action
1. Paint flow decreases when
spraying
Fluid filter clogged
Clean the filter.
Viscosity too high
Lower the material viscosity.
Nozzle too big or worn out
Replace the nozzle.
Fluid pressure too low
Increase fluid pressure.
2. Irregular fan pattern
Nozzle orifice clogged
Clean or replace nozzle.
Fluid filter clogged
Clean the filter.
Nozzle too big or worn out
Replace the nozzle.
Viscosity too high
Lower the material viscosity.
Either not enough or no
atomizing air
Adjust atomizing air flow
(regulator R).
Air cap orifices clogged
Use a soft bristle brush and
solvent or waterborne cleaning
solution to clean the air cap.
3. Nozzle clogs
Material pigment too coarse for
nozzle size
Use a larger nozzle.
Fluid filter mesh too big
Use a smaller filter mesh.
4. Spraying continues when
gun triggered off
Nozzle or needle worn out
Replace the nozzle or needle.
Needle packing gland too tight;
needle cannot move
Loosen the needle packing gland
or replace the seals.
Piston springs worn out
Replace springs. Make sure
piston moves smoothly in
cylinder.
Solenoid valve triggering gun is
malfunctioning
Check solenoid valve operation.
5. Spray gun leaking fluid
from packing gland
Packing gland too loose
Tighten packing gland.
Needle seals worn.
Replace seals.
6. Air leaking from air cap
when gun not spraying
Piston seals worn
Replace piston.
7. Spray gun leaks air at
spring cap
Piston seals worn
Replace piston.
