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AC 4600 Pro
OPERATING MANUAL
EDITION 06/2012 PART NO. DOC394871
Functional fault Cause Remedy see chapter
Insuffi cient material
discharge
Nozzle too small Select larger nozzle 9
Material pressure to low Increase material pressure
Filter of gun or high-
pressure fi lter at pump
clogged
Clean or replace fi lter 6.3
Nozzle is clogged Nozzle cleaning 5.4.5
Valve stem defective Replace valve rod 6.4
Poor spray
pattern
Wrongly adjusted
atomizing air
Readjust atomizing air 5.4.1
Nozzle to large Select smaller nozzle 9.1
Material pressure to low Increase pressure at pump
Material viscosity to
high
Thin material in accordance
with the manufacturer‘s
instructions
Partial nozzle blockage Nozzle cleaning 5.4.5
Wrongly adjusted
atomizing air
Readjust the atomizing air 5.4.1
Aircap faulty (blocked
holes, damaged seal)
Clean or replace air cap
Wrong aircap type Replace as required aircap
(solvent / water based)
Valve rod leaks (Paint- or
air path)
Paint seal (packing)
damaged or worn, valve
stem damaged
Adjust or replace packing or
replace valve stem complete
6.4
Air valve seals damaged Replace air valve seals 6.4
Pretension to low Re tighten sealing screw
Spray gun will not shut-off
correctly
Worn valve seat / valve
ball
Replace parts 6.4
Packing-screw too tight,
or packing stuck with
dried paint
Replace the seals 6.4
7 TROUBLE SHOOTING AND SOLUTION