Stihl
Stihl Robot Lawnmowers Error Codes
Complete list of fault codes and troubleshooting guides. Use the search below to find your specific error.
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E1
Display shows E1 and the robotic mower will not start mowing; status LED may flash red/orange.
Loop Signal Not Detected
E10
Display shows E10 and the mower stops; may occur randomly during operation.
Main Control PCB Overheating
E11
Display shows E11 and the mower refuses to start mowing; often after storage or long inactivity.
Time/Date or Configuration Error
E12
Display shows E12 and the mower stops; may be associated with erratic behavior or random restarts.
Internal Communication Error
E13
Display shows E13 and the mower stops when approaching the docking station.
Docking Alignment / Guide Wire Error
E14
Display shows E14 and the mower will not start; often after a collision or impact.
Bumper / Hood Sensor Stuck
E15
Display shows E15 and the mower stops; may be associated with sudden blade stoppage.
Blade Motor Electrical Fault
E16
Display shows E16 and the mower refuses to start; often related to security features.
PIN Code / Theft Protection Error
E17
Display shows E17 and the mower stops; may occur when the mower is outside the boundary.
Out-of-Bounds Detection Error
E18
Display shows E18 and the mower stops; often after hitting a hard obstacle.
Obstacle Impact Protection Triggered
E19
Display shows E19 and the mower stops; may be associated with erratic speed changes.
Speed Sensor / Wheel Encoder Fault
E2
Display shows E2 and the mower stops near the boundary; it may not recognize the perimeter correctly.
Weak or Distorted Loop Signal
E20
Display shows E20 and the mower will not start; often after firmware updates or power issues.
Firmware / Software Error
E3
Display shows E3 and the mower stops or refuses to leave the docking station.
Docking Station Communication Error
E4
Display shows E4 and the mower stops with the cutting disc not turning.
Mowing Motor Overload / Blocked Cutting Disc
E5
Display shows E5 and the mower stops shortly after starting, often on slopes or uneven ground.
Tilt or Roll-Over Sensor Triggered
E6
Display shows E6 and the mower stops; may occur when encountering obstacles or when lifted.
Lift Sensor / Collision Sensor Fault
E7
Display shows E7 and the mower will not start; often associated with wheel issues.
Drive Motor Overload or Blocked Wheel
E8
Display shows E8 and the mower stops; may be accompanied by unusual noises from the drive system.
Drive Motor Electrical Fault
E9
Display shows E9 and the mower will not start or charge properly.
Battery Pack Fault
Symptom
Robot lawnmower buttons on the control panel do not respond or respond intermittently.
Keypad / Button Failure
Symptom
Robot lawnmower display is very dim or unreadable, but the mower still operates.
Display Backlight or LCD Degradation
Symptom
Robot lawnmower does not return to the docking station and stops with an empty battery in the lawn.
Docking / Homing Failure
Symptom
Robot lawnmower does not start at all; display is blank and mower appears completely dead.
No Power / Dead Unit
Symptom
Robot lawnmower emits a burning smell or shows signs of overheating during operation.
Overheating of Motor or Electronics
Symptom
Robot lawnmower frequently gets stuck under bushes, garden furniture, or low obstacles.
Inadequate Boundary Definition Around Obstacles
Symptom
Robot lawnmower is cutting the grass unevenly, leaving scalped patches and high spots.
Incorrect Cutting Height / Uneven Deck
Symptom
Robot lawnmower is stuck spinning its wheels in one spot and does not free itself.
Loss of Traction / Wheel Slippage
Symptom
Robot lawnmower is very noisy when the blades are running, louder than usual.
Blade Imbalance or Worn Bearings
Symptom
Robot lawnmower leaves clumps of grass and the cut surface looks ragged.
Dull or Damaged Blades
Symptom
Robot lawnmower leaves the docking station but immediately returns without mowing.
Scheduling / Operating Time Misconfiguration
Symptom
Robot lawnmower leaves uncut strips of grass or misses areas of the lawn.
Coverage / Navigation Inefficiency
Symptom
Robot lawnmower makes loud rattling or knocking noises while mowing.
Loose or Damaged Cutting System Components
Symptom
Robot lawnmower occasionally loses time or date settings after being powered off.
Backup Power / Clock Retention Failure
Symptom
Robot lawnmower produces a high-pitched whining or grinding noise from one wheel.
Drive Gearbox Wear or Damage
Symptom
Robot lawnmower shows condensation or moisture inside the display window.
Moisture Ingress / Sealing Problem
Symptom
Robot lawnmower sometimes stops in the middle of the lawn with no error code, then resumes later.
Intermittent Safety Sensor Activation
Symptom
Robot lawnmower starts but stops after a few minutes with low battery indication, even after long charging.
Battery Capacity Degradation
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Display shows E1 and the robotic mower will not start mowing; status LED may flash red/orange.
|
Loop Signal Not Detected | View Details |
| E10 |
Display shows E10 and the mower stops; may occur randomly during operation.
|
Main Control PCB Overheating | View Details |
| E11 |
Display shows E11 and the mower refuses to start mowing; often after storage or long inactivity.
|
Time/Date or Configuration Error | View Details |
| E12 |
Display shows E12 and the mower stops; may be associated with erratic behavior or random restarts.
|
Internal Communication Error | View Details |
| E13 |
Display shows E13 and the mower stops when approaching the docking station.
|
Docking Alignment / Guide Wire Error | View Details |
| E14 |
Display shows E14 and the mower will not start; often after a collision or impact.
|
Bumper / Hood Sensor Stuck | View Details |
| E15 |
Display shows E15 and the mower stops; may be associated with sudden blade stoppage.
|
Blade Motor Electrical Fault | View Details |
| E16 |
Display shows E16 and the mower refuses to start; often related to security features.
|
PIN Code / Theft Protection Error | View Details |
| E17 |
Display shows E17 and the mower stops; may occur when the mower is outside the boundary.
|
Out-of-Bounds Detection Error | View Details |
| E18 |
Display shows E18 and the mower stops; often after hitting a hard obstacle.
|
Obstacle Impact Protection Triggered | View Details |
| E19 |
Display shows E19 and the mower stops; may be associated with erratic speed changes.
|
Speed Sensor / Wheel Encoder Fault | View Details |
| E2 |
Display shows E2 and the mower stops near the boundary; it may not recognize the perimeter correctly.
|
Weak or Distorted Loop Signal | View Details |
| E20 |
Display shows E20 and the mower will not start; often after firmware updates or power issues.
|
Firmware / Software Error | View Details |
| E3 |
Display shows E3 and the mower stops or refuses to leave the docking station.
|
Docking Station Communication Error | View Details |
| E4 |
Display shows E4 and the mower stops with the cutting disc not turning.
|
Mowing Motor Overload / Blocked Cutting Disc | View Details |
| E5 |
Display shows E5 and the mower stops shortly after starting, often on slopes or uneven ground.
|
Tilt or Roll-Over Sensor Triggered | View Details |
| E6 |
Display shows E6 and the mower stops; may occur when encountering obstacles or when lifted.
|
Lift Sensor / Collision Sensor Fault | View Details |
| E7 |
Display shows E7 and the mower will not start; often associated with wheel issues.
|
Drive Motor Overload or Blocked Wheel | View Details |
| E8 |
Display shows E8 and the mower stops; may be accompanied by unusual noises from the drive system.
|
Drive Motor Electrical Fault | View Details |
| E9 |
Display shows E9 and the mower will not start or charge properly.
|
Battery Pack Fault | View Details |
| – |
Robot lawnmower buttons on the control panel do not respond or respond intermittently.
|
Keypad / Button Failure | View Details |
| – |
Robot lawnmower display is very dim or unreadable, but the mower still operates.
|
Display Backlight or LCD Degradation | View Details |
| – |
Robot lawnmower does not return to the docking station and stops with an empty battery in the lawn.
|
Docking / Homing Failure | View Details |
| – |
Robot lawnmower does not start at all; display is blank and mower appears completely dead.
|
No Power / Dead Unit | View Details |
| – |
Robot lawnmower emits a burning smell or shows signs of overheating during operation.
|
Overheating of Motor or Electronics | View Details |
| – |
Robot lawnmower frequently gets stuck under bushes, garden furniture, or low obstacles.
|
Inadequate Boundary Definition Around Obstacles | View Details |
| – |
Robot lawnmower is cutting the grass unevenly, leaving scalped patches and high spots.
|
Incorrect Cutting Height / Uneven Deck | View Details |
| – |
Robot lawnmower is stuck spinning its wheels in one spot and does not free itself.
|
Loss of Traction / Wheel Slippage | View Details |
| – |
Robot lawnmower is very noisy when the blades are running, louder than usual.
|
Blade Imbalance or Worn Bearings | View Details |
| – |
Robot lawnmower leaves clumps of grass and the cut surface looks ragged.
|
Dull or Damaged Blades | View Details |
| – |
Robot lawnmower leaves the docking station but immediately returns without mowing.
|
Scheduling / Operating Time Misconfiguration | View Details |
| – |
Robot lawnmower leaves uncut strips of grass or misses areas of the lawn.
|
Coverage / Navigation Inefficiency | View Details |
| – |
Robot lawnmower makes loud rattling or knocking noises while mowing.
|
Loose or Damaged Cutting System Components | View Details |
| – |
Robot lawnmower occasionally loses time or date settings after being powered off.
|
Backup Power / Clock Retention Failure | View Details |
| – |
Robot lawnmower produces a high-pitched whining or grinding noise from one wheel.
|
Drive Gearbox Wear or Damage | View Details |
| – |
Robot lawnmower shows condensation or moisture inside the display window.
|
Moisture Ingress / Sealing Problem | View Details |
| – |
Robot lawnmower sometimes stops in the middle of the lawn with no error code, then resumes later.
|
Intermittent Safety Sensor Activation | View Details |
| – |
Robot lawnmower starts but stops after a few minutes with low battery indication, even after long charging.
|
Battery Capacity Degradation | View Details |
No matching codes found
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