3.1 Basic Information
| Version | Model | Edited by | Reviewer |
Last Updated |
Status |
Release Notes |
|---|---|---|---|---|---|---|
| V1.0 | Lymow One Plus |
Lymow Technical Support Team |
Lymow R&D |
2026-07-10 | Published | Initial Update |
| V1.1 | Lymow One Plus |
Lymow Technical Support Team |
Lymow R&D |
2026-09-20 | Published | Update the Bumper dynamic calibration method. |
3.2 Phenomenon
- Bumper is stuck, APP page pops up E44, Bumper Jammed
-
The bumper is not stuck, the APP page pops up E44, indicating Bumper Jammed
3.3 Possible Reasons
- The mower collided with an object, triggering the Bumper. (If E44 persists after the obstacle has been removed, check as follows.)
- The bumper is not stuck and the trigger threshold is reached, which may be caused by an abnormal sensor.
Bumper Trigger Principle: The Bumper of the Plus machine uses a Hall sensor. When the Bumper is squeezed inward, the value decreases, and E44 will be triggered when the value is lower than the threshold; when the Bumper expands outward, the value increases, which will cause physical damage to the Bumper and also trigger E44.
3.4 Troubleshooting Steps
- Press the left and right sides of the bumper to check whether it rebounds properly.
- After unlocking the device, long press the home button and check whether the reading is triggered when the bumper is not pressed.
- Calibrate the Bumper sensor by following the steps below:
Document:
Bumper calibration SOP
https://youtu.be/wV5n60tInYQ?si=1oCrFPgGYcaXXuXB
3.5 Solutions
- Remove grass clippings and foreign objects stuck on the Bumper structure and check if it can spring back to normal. If it still cannot function properly, please contact us via the support email to inform us of your issue.
- Calibrate the Bumper (for specific operation methods, see troubleshooting step c.)
If the issue persists after following the steps above, please contact Lymow Support Center at support@lymow.com with the following information:
- Order ID/Purchase Invoice
- Troubleshooting results (with photos)
- Device serial number (SN)
- Time the issue occurred
We will follow up as soon as possible and provide a solution.