34
GM 4700AC
OPERATING MANUAL
VERSION 09/2011
ORDER NUMBER DOC
2311730
Functional fault
Cause
Remedy
see chapter
Insuffi
cient material
output
Nozzle too small
Select larger nozzle.
8
Material pressure too
low
Increase material pressure.
Gun fi lter or high
pressure fi lter clogged at
pump
Clean or replace fi lter.
6.1
Nozzle is clogged
Nozzle cleaning
5.4.5
The valve rod path is too
short.
Replace the valve rod.
6.4
Poor spray pattern
Wrongly adjusted
atomizing air
Readjust the atomizing air.
5.4.1
The nozzle is too large.
Select a smaller nozzle.
8.1
Material pressure too
low
Increase the material pressure at
pump.
The material viscosity is
too high.
Thin material in accordance with
the manufacturer's instructions.
The nozzle is partially
clogged.
Nozzle cleaning
5.4.5
The drilled holes in the
air cap are damaged or
clogged.
Clean or replace the air cap.
5.4.5
Incorrectly selected air
cap
Insert the correct air cap (solvent
/water based paint).
5.4.5
Valve rod leaks (paint
path or air path)
The seals on the valve
rod or the valve rod is
damaged.
Replace the entire valve rod or
the individual seals.
6.4
Air valve seals are leaky.
Replace the air valve seal.
6.4
Pretension is too low.
Tighten up the sealing screw.
Spray gun will not shut-
off correctly
The valve seat or the
valve ball is damaged.
Replace the parts.
6.4
Pretension of the seals is
too strong.
Replace the seals.
6.4
7
TROUBLE SHOOTING AND RECTIFICATION