32
9 TROUBLESHOOTING AND RECTIFICATION
Functional fault Cause Remedy See Chapter
Insucient product output Nozzle too small Select larger nozzle. 13
Product pressure too
low.
Increase product pressure.
Spray gun lter or high-
pressure lter clogged at
pump.
Clean or replace lter. 8.2.5
Nozzle clogged. Nozzle cleaning 7.4.2
The valve rod path is too
short.
Replace the valve rod. 10.4
Poor spray pattern Atomizing air incorrectly
adjusted.
Readjust the atomizing air. 7.2.1
Nozzle worn. Replace the nozzle. 7.4
Product pressure too
low.
Increase the product pressure at
pump.
The product viscosity is
too high.
Dilute the spray product
in accordance with the
manufacturer's instructions.
Nozzle partially clogged. Nozzle cleaning 7.4and7.4.2
The drilled holes in the
air cap are damaged or
clogged.
Clean or replace the air cap. 7.4and13.2
Incorrectly selected air
cap.
Insert the correct air cap
(solvent/water based lacquer).
7.4and13.2
Valve rod leaks (paint path
or air path)
The seals on the valve
rod are damaged or
the valve rod itself is
damaged.
Replace the entire valve rod or
the individual seals.
10.4
Air valve seals are leaky. Replace the air valve seal. 10.6
Pretension is too low. Tighten the sealing screw. 10.4.3
Spray gun will not shut o
correctly
The valve seat or the
valve ball is damaged.
Replace the parts. 10.4
Pretension of the seals is
too strong.
Replace the seals. 10.4and10.5
VERSION 06/2018
ORDER NUMBER DOC2311730
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