YUKA: error 1015 and both batteries at 0% after the 1.30.31.19 update

What owners report

• A YUKA 2024 owner with a second battery added says the mower worked, apart from mowing problems, until Mammotion asked them to install 1.30.31.19. Within days, on 26 October, both batteries read 0%. Taken off the dock the mower shuts down at once, and put back on it powers up again with the lights behaving as if it were charging, but the figure stays at 0% for hours¹. The owner swapped the two batteries and their positions and tried a laboratory power supply set to the original charger's rating, and nothing changed. The owner gives two install dates, 20 and 22 October, in different places. The owner suspects the update disabled the battery management².
• A second YUKA 2024 owner, also with two batteries, writes in German that after updating to 1.30.31.19 the mower shows error 1015. In the dock it reads 100%; as soon as a task starts, error 1015 appears and the batteries suddenly read 0%. The warranty ran out in August 2026 and the owner has been asked to send the mower in³. The first owner compares the two cases: two YUKA 2024 units with two batteries, error 1015 and 1.30.31.19⁴.
• Both owners say Mammotion recommends sending the mower in for a paid repair⁵. The first owner says Mammotion has not explained what it found in the logs, why a motor module is suspected, or why the firmware is ruled out¹.

What Mammotion said

On 30 October a Mammotion staff account told the first owner that, from the troubleshooting details, the issue appears more likely to be a hardware malfunction, recommended the repair centre, and asked how long passed between the update and discovering the charging fault, to report it to the relevant team⁶. On 1 November the same account wrote that the symptoms differ from the earlier troubleshooting, and that the log's battery status and module readings indicated a possible fault in the motor or a part connected to the motor module. It offered a repair report afterwards⁷.

Mammotion's 27 September notes for 1.30.31.19 list remote control in the FPV view, zigzag paths closer to the edges, and improved detection of some obstacles¹⁰. Battery or charging is not among the items.

Other YUKA owners on the same version

In the German forum, a YUKA owner with two batteries says the update arrived and the mower runs; they took it out again to check⁸. An owner with one battery says it runs no worse than before⁹. The first owner, in the same thread, notes that theirs is a 1500 with two batteries and no sweeper kit, and offers that as one possible difference¹¹. No source tests it.

What we do not know

• The cause. Mammotion's staff account says hardware. The first owner says the timing points at the update. Neither is confirmed.
• How many mowers. Two owners report this; others on the same version, some with two batteries, do not.
• Whether the battery count, the model or the update matters. Both affected mowers are YUKA 2024 with two batteries, and one unaffected owner also has two batteries.
• What a repair finds. Nobody has reported a result yet.

Not the same as

A YUKA mini that stops charging around an update is on its own page. A charge that stops part-way on the dock is on another page. The error code table is on the fault codes page.