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38
GM 3000AC
OPERATING MANUAL
EDITION 05/2007
PART NO. DOC364831
7 TROUBLE SHOOTING AND SOLUTIONS
Problem Cause Solution
Paint output too low Nozzle too small Select larger nozzle (see para. 9.1)
Paint pressure too low Adjust at pump as required.
Gun fi lter blocked
or HP fi lter at pump
clogged
Clean/ replace fi lters (see para. 6.1)
Nozzle blocked or Clean nozzle (see section 5.4.5)
Trigger/ valve stem
defective
Replace valve stem
Poor quality spray pattern Incorrect atomizing air
pressure
Re-adjust (see para. 5.4.1)
Nozzle too large Select smaller nozzle (see para. 9.1)
Paint pressure too low Increase pressure at pump
Material viscosity too
high
Thin material acc. to manufacturer‘s
instruction.
Partial nozzle blokkage Clean nozzle (see para. 5.4.5)
Incorrect fanair
adjustment (fan to
wide or to narrow)
Re-adjust fanair control on spraygun (see
para. 5.4.1)
Aircap faulty (blocked
holes, damaged seal)
Clean or replace aircap
Wrong aircap type Replace as requiered (solvent /
waterbased)
Leaking valve stem seals
(paint or air)
Paint seal (packing)
amaged or worn, valve
stem damaged.
Adjust or replace packing or replace valve
stem cpl.
Air valve seals
damaged.
Replace air valve seals (see para. 6.3)
Pretension to low Tighten the sealing screw
Spaygun will not shut-off
correctly
Worn valveseat / valve
ball
Replace as required
Packing-screw too
tight, or packing stuck
with dried paint
Retension or replace packing