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EDITION 03/ 2007
OPERATING MANUAL
7
TROUBLE SHOOTING AND SOLUTIONS
Problem
Insuffi cient material output
Poor spray pattern
Leaking air
Poor wraparound
Backspraying
PART NO. DOC388891
Cause
• Nozzle too small
• Material pressure too
low
• Material viscosity too
high
• Filter in material supply
clogged
• Nozzle is clogged
• Tension nut is screwed
in too far
• Wrongly adjusted
atomizing air
• Nozzle too large
• Material viscosity too
high
• Material pressure too
high
• Damaged nozzle
• Damaged electrode
• Air seal (24)* damaged
• Seal (13)* on the air
control knob damaged
• Tappet seal (25)*
damaged
• Poor earthing at object
• Paint resistance too
high / too low
• Spraying pressure too
high
• Object not earthed
• Distance between
spray gun and object
too large
GM 2800EA
Solution
• Flat jet: Select larger nozzle.
(See nozzle list)
• Increase material pressure
• Thin material in accordance
with the manufacturer's
instructions
• Clean or replace fi lter
• Clean or replace nozzle
• Turn tension nut
anticlockwise
• Readjust atomizing air
• Select smaller nozzle (see
nozzle list)
• Thin material in accordance
with the manufacturer's
instructions
• Reduce material pressure
• Replace nozzle
• See chap. 8.4 for repairs
• Change air seal
• Change seal
• Change tappet seal
• Check earthing of object or
hanger with ohmmeter
• Check resistance of paint in
accordance with chap. 4.1.1
• Readjust pressure
• Check earthing
• Reduce distance between
spray gun and object
31
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