S-AGR08-Egb08
05/15 - 3
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8 Maintenance
8.7 Faults
Note!
In case of faults, determine the cause before disassembling to eliminate the error with as little
maintenance work as possible.
Faults
Possible causes
Corrective action
No uniform atomization or
spray pattern is not symmetri-
cal
Nozzle stuck or damaged or
deformed on the paint trailing
edge
Air cap holes are clogged in
complete or in part, or de-
formed
Clean nozzle/air cap with
suitable cleaning material or
replace it
Insufficient atomization/fan air
Fan air and atomizer air are
not set correctly
Air cap and/or air distribution
ring have not enough through-
put
Cable cross-section capacity is
too low or narrows by screw-
ing, kinking points or similar
Nozzle cross-section config
-
ured incorrectly
Readjust fan air and atomizer
air
Replace air cap or/and air
distributing ring
Revise cable cross-section,
replace screws, cut out kinking
points and/or use new hose
Replace nozzle
Atomization/fan air can not be
shut off completely
Defective proportional valve or
pressure regulating valve
Replace defective component
Atomization/fan air can not
properly regulate
Seals at air distributing ring
not installed properly or not
present
Replace seals
Material flow too low or non-
existent
Clogged nozzle
Main needle stiff/blocked
Piston or needle set glued
Clean nozzle
Control pressure should not
fall below 5.0 bar
Clean piston or replace needle
set
Paint outlet at the gun
Needle set or needle worn
(paint outlet on housing)
Maintain gun
Replace needle set and/or
needle
