Samson 3374 Series - Other Malfunctions or Errors; Emergency Action

EB 8331-4 EN 9-5
Malfunctions
9.1.2 Other malfunctions or errors
Î Troubleshooting (see Table 9-1).
Contact SAMSON's After-sales Service for malfunctions not listed in the table.
Table 9-1: Troubleshooting
Error Possible reasons Recommended action
Actuator stem does not move. Actuator is blocked.
Î Check attachment.
Î Remove the blockage.
No or incorrect supply voltage
connected.
Î Check the supply volt-
age and connections.
Incorrectcongurationorincorrect
application
Î Check the actuator
conguration
Actuator stem does not move
through the whole range.
No or incorrect supply voltage
connected.
Î Check the supply volt-
age and connections.
9.2 Emergency action
The valve, on which the actuator with fail-safe action is mounted, is moved to its fail-safe po-
sition upon failure of the supply voltage (see the 'Design and principle of operation' section).
Plant operators are responsible for emergency action to be taken in the plant.
Emergency action in the event of valve failure is described in the associated valve documen-
tation.
Note
Tip