Samson 3278, Translation Of Original Instructions

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EB 8321 EN 7-1
Malfunctions
7 Malfunctions
Read hazard statements, warnings and caution notes in the 'Safety instructions and mea -
sures' section.
7.1 Troubleshooting
Malfunction Possible reasons Recommended action
Actuator shaft does not
move on demand.
Actuator is blocked. Check attachment.
Remove the blockage.
Insufficient signal
pressure
Check the signal pressure.
Check the signal pressure line for leakage.
Signal pressure not
connected to the correct
connection.
See 'Signal pressure routing' in the 'Design and
principle of operation' section.
Diaphragm in the
actuator defective
See 'Replacing the diaphragm' in the 'Servicing'
section.
Actuator shaft does not
stroke through its
complete opening
angle.
Handwheel restricts the
opening angle
Turn the handwheel to the neutral position (see the
'Operation' section).
Insufficient signal
pressure
Check the signal pressure.
Check the signal pressure line for leakage.
Incorrect setting of
valve accessories.
Check the actuator without valve accessories.
Check the settings of the valve accessories.
Contact our after-sales service for malfunctions not listed in the table.
7.2 Emergency action
Plant operators are responsible for emergency action to be taken in the plant.
Note