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1. Select the Additional Features icon in the main menu.
2. Select Configuration.
3. Enter the five-position service PIN and confirm with OK.
4. Select one of the three operating modes.
5. Select Adjust Sensor.
6. Keep the handset still in a vertical position and confirm with OK.
7. Shake the handset vigorously until the test is successful.
8. Keep the handset still in a vertical position until the test is successful.
9. Press the red alarm key at the top of the handset.
10. Remove the connector with the pull cord from the socket at the lower end of the handset and insert it again.

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