Samson 3277 - Testing the Installed Valve

EB 8310-6 EN 8-1
Malfunctions
8 Malfunctions
8.1 Troubleshooting
Malfunction Possible reasons Recommended action
Actuator stem does not
move on demand.
Actuator is blocked. Check attachment.
Unblock the actuator.
WARNING! A blocked actuator (e.g. due to seizing
up after remaining in the same position for a long
time) can suddenly start to move uncontrollably.
Injury to hands or ngers is possible if they are
inserted into the actuator or valve.
Before trying to unblock the actuator stem,
disconnect and lock the pneumatic air supply as
well as the control signal. Before unblocking the
actuator stem, release any stored energy in the
actuator (e.g. spring compression). See 'Relieving
the spring compression in the actuator' in the
'Removal' section.
Insufcient signal
pressure
Check the signal pressure.
Check the signal pressure line for leakage.
Signal pressure not
connected to the correct
diaphragm chamber.
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 stem does not
stroke through its
complete travel range.
Travel stop active See 'Adjusting the travel stop' in the 'Start-up'
section.
Insufcient 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.
Note