Actuator does not
respond, both LEDs are
off
1) No supply voltage applied
2) The applied voltage does not
match the actuator voltage on
the tag plate
1) Check mains supply
2) Apply correct supply voltage
Actuator does not drive
the full stroke
1) Actuator not correctly
commissioned
2) Too small stroke
programmed (in mode “one
position-dependent cut-off”)
1) Repeat commissioning
2) Check valve stroke parameters -> see
instructions AMS-PSCS
Actuator does not close
the valve properly
1) Actuator not correctly
commissioned
2) Actuator closing force/
torque too low
1) Repeat commissioning
2) Check actuator selection
Actuator is in normal
operating condition, but
does not respond to set-
value changes
1) Fixed digital set-value is
activated
2) Actuator is configured to
work with process controller
1) Check set-value parameters -> see instrucions
AMS-PSCS
2) Connect process sensor
Actuator position does
not correspond to set-
value input
A non-linear valve curve has
been parameterised
Verify parameterised characteristic -> see
instructions AMS-PSCS
Normal operating
condition
Actuator in
commissioning mode
Commissioning mode will be left automatically
after completion
Actuator not
commissioned
Depending on the type of cut-offs, the actuator
has to be commissioned either automatically or
manually
Faults within the
actuator’s environment
Too high torque has
been encountered
within the valve stroke
1) Actuator not correctly
commissioned to the valve
2) Mechanical block within the
stroke path
3) Improper selection of the
actuator
1) Repeat commissioning
2) Check valve and actuator for unobstructed
running
3) Check actuator selection
1) No proper process
feedback (only in
combination with PSIC)
2+3) Maximum control
range exceeds (only in
combination with PSIC)
1) Process feedback wrongly or
not at all connected
2) Process feedback outside od
adjusted range
1) Apply the correct process feedback signal and
check polarity
2) Ensure the correct process feedback range
3) Check the process sensor and its supply
voltage