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2.5 Manual Override
Switching over to manual operation requires an "active" positioner, i.e. the positioner has to be
powered electrically and connected to the supply air.
Switching over to manual operation mode is carried through by pushing button "IN" (2) or "OUT"
(3) on the connecting plate for two seconds approximately. The red LED (4) on the connecting
plate lights up.
Pushing button "IN" (supply air to actuator) or "OUT" (actuator is vented) opens or closes the
valve.
Switching off the manual operation mode is carried through by pushing both buttons for a short
moment. The valve moves back to its initial position corresponding to the valid set-point signal.
If both buttons are actuated more than 2-3 seconds, the positioner switches to self-
adjusting mode.
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