Samson EB 8075 EN, Монтаж и эксплуатация

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EB 8075 EN 8-1
Malfunctions
8 Malfunctions
Read hazard statements, warnings and caution notes in the 'Safety instructions and mea-
sures' section.
8.1 Troubleshooting
Malfunction Possible reasons Recommended action
Actuator and piston
stem does not move on
demand.
Actuator is blocked. Check attachment.
Remove the blockage.
WARNING! A blocked actuator or piston stem
(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 fingers
is possible if they are inserted into the actuator or
valve.
Before trying to unblock the actuator or piston
stem, disconnect and lock the pneumatic air
supply as well as the control signal. Before
unblocking the actuator, release any stored energy
in the actuator (e.g. spring compression). See
associated actuator documentation.
Signal pressure too low Check the signal pressure.
Check the signal pressure line for leakage.
Jolting movement of the
actuator and piston
stem
Version with adjustable
packing 1) : packing not
tightened correctly
Tighten the packing correctly (see information
under 'Adjusting the packing' in the 'Testing the
installed valve' section).
Actuator and piston
stem does not stroke
through the entire
range.
Signal pressure too low Check the signal pressure.
Check the signal pressure line for leakage.
Travel stop active See associated actuator documentation.
Incorrect setting of valve
accessories
Check the settings of the valve accessories.