To check the sensor proper working, you need to place the tester rods at the Yellow
and Grey wires of the 9-pin fixed connector. If the sensor works properly the tester
should show an open circuit
Open the front panel to make sure the sensor is not damaged,
Remount the actuator covering, using (A) (B) (C) screws
Take a magnet and place it close to the sensor , then repeat the test using a tester:
the circuit should be closed at this point
If without the use of the magnet, the circuit is closed, carry a screwdriver -head
screwdriver and move the position of the sensor down.