husqvarna · Automower Technical Manual
This fault indicates that the Automower's drive system is not functioning. It can be due to the mower being physically caught or problems with the wheel motors.
Click steps to track your progress.
Free the mower from any objects it may be caught in and rectify the reason for the obstruction.
Check the drive wheels for cleanliness and remove any accumulated grass or debris.
Use wheel brushes (505 13 27-01) to maintain clean drive wheels and increase traction.
Check the wheel motors via Tools - Test - Motors (Shortcut 5-2-5).
If the problem persists, contact service for diagnosis of motor issues.