AL-KO
AL-KO 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
Robot mower will not start mowing and displays E1 shortly after power-on.
Emergency Stop or Lift Sensor Triggered
E10
Robot mower shows E10 and refuses to start, often after winter storage.
Battery Temperature or Temperature Sensor Error
E11
AL-KO robot mower displays E11 and stops when trying to drive forward or reverse.
Drive Motor Overload or Overcurrent Protection
E12
Robot mower shows E12 and does not detect the boundary wire correctly, sometimes crossing it.
Loop Sensor or Perimeter Receiver Fault
E13
AL-KO robot mower displays E13 and stops when lifted or carried.
Lift Sensor Calibration or Fault
E14
Robot mower shows E14 and cannot communicate with the charging station or app gateway.
Communication Error with Base Station or Module
E15
AL-KO robot mower displays E15 and refuses to start due to a security or PIN issue.
PIN Code or Anti-Theft Lockout
E16
Robot mower shows E16 and stops when the cutting height is adjusted.
Cutting Height Motor or Potentiometer Fault
E17
AL-KO robot mower displays E17 and stops when reversing or turning.
Rear Wheel or Caster Sensor Error
E18
Robot mower shows E18 and stops with the message related to overload or blocked cutting system.
Cutting System Overload (Severe)
E19
AL-KO robot mower displays E19 and cannot complete software initialization.
Internal Software or EEPROM Error
E2
Robot mower stops shortly after starting and displays E2 on the display.
Tilt Sensor or Over-tilt Protection Activated
E20
Robot mower shows E20 and stops when encountering obstacles, even small ones.
Ultrasonic or Obstacle Sensor Fault (if equipped)
E3
AL-KO robot mower displays E3 and does not move from its position.
Wheel Motor Blocked or Overcurrent
E4
Robot mower shows E4 and the cutting disc does not rotate.
Blade Motor Blocked or Overload
E5
Robot mower displays E5 and stops near the boundary wire.
Boundary Wire Signal Lost or Out of Range
E6
Robot mower shows E6 and refuses to start mowing from the charging station.
Charging Station Alignment or Docking Error
E7
AL-KO robot mower displays E7 and stops with the front bumper pressed in.
Collision Sensor or Bumper Stuck
E8
Robot mower shows E8 and does not respond to start commands.
Keypad or Control Panel Error
E9
AL-KO robot mower displays E9 and shuts down unexpectedly during operation.
Battery Voltage Too Low or Battery Protection Triggered
Symptom
Robot mower blades continue to rotate for an unusually long time after pressing the stop button.
Delayed Blade Stop / Safety Relay Issue
Symptom
Robot mower display fogs up or shows condensation inside the screen.
Moisture Ingress into Display / Control Panel
Symptom
Robot mower does not detect rain and continues mowing in wet conditions despite having a rain sensor.
Rain Sensor Not Working
Symptom
Robot mower does not respond to the mobile app or remote connectivity features.
Connectivity / Smart Module Failure
Symptom
Robot mower does not return to the charging station and stops with an empty battery somewhere in the lawn.
Home Finding / Return-to-Base Failure
Symptom
Robot mower does not start at all; display is blank and there are no sounds or lights.
No Power / Dead Mower
Symptom
Robot mower emits a burning smell or the housing feels unusually hot.
Overheating of Motor or Electronics
Symptom
Robot mower frequently gets stuck under low bushes or garden furniture.
Obstruction / Clearance Issue
Symptom
Robot mower is cutting outside the intended lawn area or entering flower beds.
Boundary Containment Failure
Symptom
Robot mower is frequently stuck, spinning its wheels without moving forward.
Traction Loss / Wheel Slipping
Symptom
Robot mower is very loud during operation, with grinding or rattling noises from underneath.
Mechanical Noise from Cutting Deck or Drive
Symptom
Robot mower leaves clumps of grass and the cut quality is poor or uneven.
Poor Cut Quality / Dull Blades
Symptom
Robot mower leaves uncut strips of grass or misses areas within the boundary.
Poor Coverage / Navigation Pattern Issue
Symptom
Robot mower occasionally leaves small oil or grease spots on the lawn.
Lubricant Leak from Gearbox or Motor
Symptom
Robot mower occasionally leaves the charging station during prohibited times (e.g., at night or during rain).
Scheduling / Sensor Override Fault
Symptom
Robot mower occasionally reboots or restarts by itself during operation.
Intermittent Power or Electronics Fault
Symptom
Robot mower starts but stops after a few minutes without any error code, often returning to the station early.
Reduced Runtime / Weak Battery
Symptom
Robot mower tilts or tips easily on slopes and sometimes rolls onto its side.
Instability on Slopes
Symptom
Robot mower's front or rear wheels wobble noticeably during operation.
Wheel Play / Bearing Wear
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E1 |
Robot mower will not start mowing and displays E1 shortly after power-on.
|
Emergency Stop or Lift Sensor Triggered | View Details |
| E10 |
Robot mower shows E10 and refuses to start, often after winter storage.
|
Battery Temperature or Temperature Sensor Error | View Details |
| E11 |
AL-KO robot mower displays E11 and stops when trying to drive forward or reverse.
|
Drive Motor Overload or Overcurrent Protection | View Details |
| E12 |
Robot mower shows E12 and does not detect the boundary wire correctly, sometimes crossing it.
|
Loop Sensor or Perimeter Receiver Fault | View Details |
| E13 |
AL-KO robot mower displays E13 and stops when lifted or carried.
|
Lift Sensor Calibration or Fault | View Details |
| E14 |
Robot mower shows E14 and cannot communicate with the charging station or app gateway.
|
Communication Error with Base Station or Module | View Details |
| E15 |
AL-KO robot mower displays E15 and refuses to start due to a security or PIN issue.
|
PIN Code or Anti-Theft Lockout | View Details |
| E16 |
Robot mower shows E16 and stops when the cutting height is adjusted.
|
Cutting Height Motor or Potentiometer Fault | View Details |
| E17 |
AL-KO robot mower displays E17 and stops when reversing or turning.
|
Rear Wheel or Caster Sensor Error | View Details |
| E18 |
Robot mower shows E18 and stops with the message related to overload or blocked cutting system.
|
Cutting System Overload (Severe) | View Details |
| E19 |
AL-KO robot mower displays E19 and cannot complete software initialization.
|
Internal Software or EEPROM Error | View Details |
| E2 |
Robot mower stops shortly after starting and displays E2 on the display.
|
Tilt Sensor or Over-tilt Protection Activated | View Details |
| E20 |
Robot mower shows E20 and stops when encountering obstacles, even small ones.
|
Ultrasonic or Obstacle Sensor Fault (if equipped) | View Details |
| E3 |
AL-KO robot mower displays E3 and does not move from its position.
|
Wheel Motor Blocked or Overcurrent | View Details |
| E4 |
Robot mower shows E4 and the cutting disc does not rotate.
|
Blade Motor Blocked or Overload | View Details |
| E5 |
Robot mower displays E5 and stops near the boundary wire.
|
Boundary Wire Signal Lost or Out of Range | View Details |
| E6 |
Robot mower shows E6 and refuses to start mowing from the charging station.
|
Charging Station Alignment or Docking Error | View Details |
| E7 |
AL-KO robot mower displays E7 and stops with the front bumper pressed in.
|
Collision Sensor or Bumper Stuck | View Details |
| E8 |
Robot mower shows E8 and does not respond to start commands.
|
Keypad or Control Panel Error | View Details |
| E9 |
AL-KO robot mower displays E9 and shuts down unexpectedly during operation.
|
Battery Voltage Too Low or Battery Protection Triggered | View Details |
| – |
Robot mower blades continue to rotate for an unusually long time after pressing the stop button.
|
Delayed Blade Stop / Safety Relay Issue | View Details |
| – |
Robot mower display fogs up or shows condensation inside the screen.
|
Moisture Ingress into Display / Control Panel | View Details |
| – |
Robot mower does not detect rain and continues mowing in wet conditions despite having a rain sensor.
|
Rain Sensor Not Working | View Details |
| – |
Robot mower does not respond to the mobile app or remote connectivity features.
|
Connectivity / Smart Module Failure | View Details |
| – |
Robot mower does not return to the charging station and stops with an empty battery somewhere in the lawn.
|
Home Finding / Return-to-Base Failure | View Details |
| – |
Robot mower does not start at all; display is blank and there are no sounds or lights.
|
No Power / Dead Mower | View Details |
| – |
Robot mower emits a burning smell or the housing feels unusually hot.
|
Overheating of Motor or Electronics | View Details |
| – |
Robot mower frequently gets stuck under low bushes or garden furniture.
|
Obstruction / Clearance Issue | View Details |
| – |
Robot mower is cutting outside the intended lawn area or entering flower beds.
|
Boundary Containment Failure | View Details |
| – |
Robot mower is frequently stuck, spinning its wheels without moving forward.
|
Traction Loss / Wheel Slipping | View Details |
| – |
Robot mower is very loud during operation, with grinding or rattling noises from underneath.
|
Mechanical Noise from Cutting Deck or Drive | View Details |
| – |
Robot mower leaves clumps of grass and the cut quality is poor or uneven.
|
Poor Cut Quality / Dull Blades | View Details |
| – |
Robot mower leaves uncut strips of grass or misses areas within the boundary.
|
Poor Coverage / Navigation Pattern Issue | View Details |
| – |
Robot mower occasionally leaves small oil or grease spots on the lawn.
|
Lubricant Leak from Gearbox or Motor | View Details |
| – |
Robot mower occasionally leaves the charging station during prohibited times (e.g., at night or during rain).
|
Scheduling / Sensor Override Fault | View Details |
| – |
Robot mower occasionally reboots or restarts by itself during operation.
|
Intermittent Power or Electronics Fault | View Details |
| – |
Robot mower starts but stops after a few minutes without any error code, often returning to the station early.
|
Reduced Runtime / Weak Battery | View Details |
| – |
Robot mower tilts or tips easily on slopes and sometimes rolls onto its side.
|
Instability on Slopes | View Details |
| – |
Robot mower's front or rear wheels wobble noticeably during operation.
|
Wheel Play / Bearing Wear | View Details |
No matching codes found
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