Robot Will Not StartWhat to check when the J1600 does not power on, including the key switch position, battery charge level, and emergency-stop controls.Robot Will Not Enter Autonomous ModePreconditions the J1600 needs before it switches to autonomous driving, and what to check when the mode change does not happen.Navigation ProblemsWhat to check when the J1600 hesitates, detours, or cannot reach a destination, including map freshness, blocked routes, and floor conditions.Mapping ProblemsHow the J1600 builds and updates its 3D map by manual driving, and what to do when locations are missing or the map is out of date.Obstacle or Safety-Field StopsWhy the J1600 stops when people or objects enter its 360-degree safety field, what the blue lights mean, and how to resume a stopped task.Charging ProblemsExpected J1600 charge and drain rates, manual versus automatic charging behavior, and what to check when the battery does not charge.Task and Location ProblemsFixes for missing destinations, unexpected post-delivery behavior, and drop-height confusion when creating tasks on the J1600.Connectivity ProblemsWhich J1600 functions work without Wi-Fi, which features depend on connectivity, and how to think about network issues on site.