Factory Reset / Restore Factory Presets

1. Turn the Orbit-3 off.
2. Hold down the [HOME] and [ENTER] buttons simultaneously.
3. While holding the buttons, turn the power on.
4. Release the buttons when the display prompts you.
5. Use the [DATA] knob to select 'FACTORY'.
6. Press [ENTER].
7. The unit will prompt 'ARE YOU SURE?'.
8. Press [ENTER] again to confirm the restore.
9. The unit will load the factory presets.

Source: Orbit-3 — orbit3ownersmanual (manual)