DÖRR EcoGun AS AUTO pro, Operation Manual

Page: 21 / 44

Fault description Cause Remedy
Horn air pressure too
low Raise horn air pressure using the horn air
control (F).
Split spray jet Not enough material
Increase material feed.
Reduce spraying air pressure (A).
Material too thin
Change material consistency.
Horn air pressure too
high
Raise horn air pressure using the horn air
control (F).
Cone-shaped spray
jet Bores in air cap are
soiled Clean and check air cap. Replace air cap if
defective Ä 7.2 “Cleaning”.
Nozzle soiled or defec-
tive Clean and check the nozzle. If nozzle is
defective, replace it along with the needle
Ä 9.3.1 “Replace needle and nozzle.”.
Sickle-shaped spray
jet Bores in air cap are
soiled
Clean and check air cap. Replace air cap if
defective Ä 7.2 “Cleaning”.
Nozzle soiled or defec-
tive
Clean and check the nozzle. If nozzle is
defective, replace it along with the needle
Ä 9.3.1 “Replace needle and nozzle.”.
Cap nut or nozzle is not
properly tightened
Tighten cap nut and nozzle Ä 7.2
“Cleaning”.
Uneven spray jet Nozzle soiled or defec-
tive. Clean and check the nozzle. If nozzle is
defective, replace it along with the needle
Ä 9.3.1 “Replace needle and nozzle.”.
Material pressure too
low. Increase material pressure.
Infeed line pinched or
broken
Check infeed line.
Needle does not close
correctly.
Check Control air.
Check operation of needle. Replace
needle, if defective, together with the
nozzle Ä 9.3.1 “Replace needle and
nozzle.”.
Cap nut or nozzle is not
properly tightened
Tighten cap nut and nozzle Ä 7.2
“Cleaning”.
Needle seal worn out
Replace needle seal Ä 9.3.2 “Replace
needle seal”.
Faults
02/2020 EcoGun AS AUTO pro - MSG00005EN 21/44