13 Fault removal
ARCA Regler GmbH
30 / 32
Series 812-DWK
03.2020 / 1.0
13
Fault removal
WARNING
Improper troubleshooting work
Risk of injury!
► For all troubleshooting work, observe the corresponding notes – in
particular the safety instructions – in this operating manual or in the
operating manuals for the additionally installed components.
Please contact the manufacturer if problems occur that are not de-
scribed in this table.
Fault
Possible causes
Action
Actuator stem doesn't
move
No actuation air pressure signal
present
Check signal source
Actuation signal connection incor-
rectly implemented
Check actuation signal connection
and direction of action of the actu-
ator
Actuation signal air pressure too
low
Increase air pressure, observe max.
permissible air pressure
Piston seal defective
Replace the piston seal
Actuator stem seal is leak-
ing
Sealing element worn
Replace sealing element, clean
stem surface
Stem surface damaged
Replace stem and sealing elements
Actuating force too low
Actuation signal air pressure too
low
Increase air pressure, observe max.
permissible air pressure
Leaks in the actuation signal line
Check the signal line
Positioner, if any, is incorrectly ad-
justed
Check the positioner adjustment
