What do the lights mean?

The five LEDs are used to indicate errors and normal operating states.

  • NO LEDs - Tertill is either in Off mode or in AutoCharge mode. If you want to make sure it is in Off mode press and hold the button for 10s and observe the power off sequence (with center red LED indicator). Press and release the button to power up Tertill into Hold mode.
  • Mixed Colors - Initial power up, disappears after a few seconds.
  • Green Sweep - Tertill is in Hold mode. Press and release the button to put Tertill to work by entering Patrol mode.
  • Green Outside-to-Inside (Arrow) - This is a warning that Tertill is about to start Patrolling. Make sure it is in a safe place and not, for example, on a table top or ledge it could drive off of. Tertill is not "cliff aware".
  • Center Green (only) - Tertill is Patrolling. Sit back and relax.
  • Center Red (only) - Tertill is powering off. When the center red LED turns off Tertill is off. Press and hold the button for 10s to power off the robot.
  • Blue Left-to-Right Sweep - Tertill is updating it's software from your mobile device, this may take a few minutes to complete. Keep your mobile device in Tertill's vicinity (20ft/6m) to avoid losing the connection.
  • All LEDs lit up Green or a mix of Red/Yellow/Green - Diagnostic info. This indication appears for one second immediately after you press and release the button to change from Hold mode to Patrol mode.
    • Left LED - Battery charge state - Red: very low, Yellow: low, Green: ready. If Red Tertill will charge on its own but this might take a while depending on the Sun. You can get Tertill back into action faster by charging with a USB cable (always remember to replace the protective cap).
    • Middle Left LED - Green: Wheels OK, Red: Wheels slow or jammed. Turn the robot upside down and remove any debris that may be caught in the wheels or any object stuck between wheels or wheels and chassis
    • Center LED - Green: Whacker OK, Red: Whacker needs attention, could be tangled up in debris or the whacker cord may need replacing.
    • Middle Right LED - Green: Sensors OK, Red: Sensor error, this can happen if the front plan sensors are wet from rain or sprinklers. Dry off the front sensors area or wait until the rain or sprinklers have stopped.
    • Right LED - Green: OK, Red: overheated, Tertill shut itself off to cool down.

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