Error message "Mower lifted"

Error message "Lifted" or "Alarm! "Mower lifted" is shown when the lift sensors are activated and cause the mower to stop.
Usual causes::

• The mower has been lifted, carried or moved manually.
• The mower has driven over a spade, a toy, a branch or an apple, for example.
• The mower is on part of the lawn that needs to be marked with an island, for example tree roots or a trampoline.