Rev. 1.2
Assembly Instructions - Spray Valve SMS-02
Page 16 of 34
Walther Systemtechnik GmbH
– D 76726 Germersheim
Telefon: +49 (0)7274-7022-0 Telefax: +49 (0)7274-7022-91
http://www.walther-2000.de
8 Troubleshooting
8.1 General Information
IMPORTANT
First check all supply lines for connection and serviceability.
In case of serious problems that cannot be resolved, please contact the Walther Systemtechnik GmbH
customer service.
8.2 Failures:
Fault
Possible Cause
Action
Nozzle needle does
not open.
No electrical current (slight clicking-
sound at the magnetic valve )
Check electrical power supply
Not enough control air pressure
Check control air pressure (make sure it
set to 5-6 bar)
Leakages
Check O-ring (6.2.0), O-ring (7.4.0) or
O-ring (7.5.0) and replace if necessary
Needle (7.0.0) is sticky within the needle
sealing screw (6.1.0)
Disassemble and clean
Needle stroke is set too low
Turn left at raster-needle setting for
proper setting
Pre-supply/After-supply
air is constantly
blowing
Adjusting screw (10.4.0) was screwed in
too deep
Move adjusting screw back to basic
setting (see 4.3)
Locking piston (11.2.0) not suitable for
atomizer air pressure
Replace air valve (11.0.0) completely
(see spare parts list)
O-ring (11.2.1) on locking piston
defective
Replace O-ring
Medium leaks at slot
(covered by plastic
protection sleeve 5.4.0)
Leakage of material sealing
Complete overhaul of spray valve
