INFICON Sensistor ILS500F Leak Detection System - Manual (Page 68)

Maintenance Instructions 68
ninp69e1-a (1410)
9.2.6 Replacing Pilot Valves
1 Use small screw driver to loosen the screw holding the valve. You must back the
screw all the way out until you feel it “jumping” in the thread entrance.
2 Push down on the LEDs while pressing the screw down until you feel the locking
mechanism “snap”.
3 Lift the old valve out from the coil side. If the valve does not come off, repeat steps
3 and 4 making sure the screw is completely backed out.
4 Push the screw in while inserting the new valve. Insert the end facing the screw
first and then push the coil side down.
5 Tighten the screw.
6 Replace the cover.