The mower has detected a battery it doesn't recognise as a valid match for its configuration.
Common causes
A non-genuine or wrong-model replacement battery.
A loose battery connector, or mismatched batteries on multi-battery models.
How to fix it
Fit a genuine battery specified for your exact model.
Check the battery connector is fully seated.
If a correct, genuine battery still triggers it, have the battery and wiring checked.
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MowerWatch is an independent product, not affiliated with, endorsed by, or sponsored by Husqvarna AB. Automower® is a registered trademark of Husqvarna AB, used only to describe compatibility. Codes and guidance are provided in good faith — always follow your model's operator manual and consult a dealer for repairs. · All error codes · Guides