TerraMow
TerraMow 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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E01
Robot will not start mowing; display shows E01 immediately after power-on or when START is pressed.
Main Power Supply / Battery Protection Fault
E02
Robot stops and displays E02 shortly after leaving the charging station; may beep and shut down.
Low Battery Voltage Under Load
E03
Display shows E03 and the mower will not leave the charging station.
Charging Station Communication Fault
E04
Mower displays E04 and stops; often occurs when trying to start a mowing cycle away from the base.
Boundary Wire Signal Not Detected
E05
Robot stops near the edge of the lawn and shows E05; may not detect the boundary correctly.
Weak Boundary Signal / Interference
E06
Mower displays E06 and stops when encountering obstacles; bumper may feel stuck.
Front Bumper / Collision Sensor Fault
E07
Display shows E07 and the mower refuses to start; often after being lifted or tilted.
Tilt / Lift Sensor Fault
E08
Mower stops and shows E08; blades do not spin when mowing should start.
Blade Motor Overload / Stall
E09
Mower displays E09 and stops; wheels may jerk or not move at all.
Drive Motor Overcurrent / Stall
E10
Display shows E10; mower may move but blades do not start, or vice versa.
Main Control Board Communication Error
E11
Mower shows E11 and refuses to start; often after rain or washing.
Rain Sensor / Moisture Detection Fault
E12
Display shows E12; mower may not respond to keypad or app commands.
User Interface / Keypad Communication Error
E13
Mower shows E13 and stops when lifted or when passing over bumps.
Front Lift Sensor Triggered / Fault
E14
Display shows E14; mower may not dock correctly or overshoots the charging station.
Docking Alignment / Infrared Receiver Fault
E15
Mower shows E15 and stops; GPS-based navigation or app location may be inaccurate.
GPS Module Communication Error
E16
Display shows E16; mower may not connect to Wi‑Fi or mobile app.
Wi‑Fi / Connectivity Module Fault
E17
Mower shows E17 and stops; often when climbing or descending slopes.
Incline Overload / Slope Exceeded
E18
Display shows E18; mower may stop randomly with no obvious obstacle.
Obstacle Sensor / Ultrasonic Sensor Fault
E19
Mower shows E19 and will not start; child lock icon may be displayed.
Safety Lock / PIN Code Error
E20
Display shows E20; mower may shut down due to high internal temperature.
Overtemperature Protection
E21
Mower shows E21 and stops; often after hitting a solid obstacle.
Chassis Shock / Impact Detected
E22
Display shows E22; mower may not detect when it is on the charging station.
Charging Contact / Dock Detection Fault
E23
Mower shows E23 and stops; cutting height cannot be adjusted or is stuck.
Cutting Height Motor / Actuator Fault
E24
Display shows E24; mower may behave erratically or reboot unexpectedly.
Firmware / Software Integrity Error
E25
Mower shows E25; blade speed is unstable or too low even in light grass.
Blade Motor Speed Sensor Fault
E26
Display shows E26; one wheel spins faster or slower than the other, causing crooked paths.
Wheel Encoder / Speed Sensor Fault
E27
Mower shows E27; internal clock or schedule is lost after power-off.
Real-Time Clock / Backup Power Fault
E28
Display shows E28; mower cannot be paired with the mobile app via Bluetooth.
Bluetooth Module Fault
E29
Mower shows E29; internal memory for zones or maps cannot be accessed.
Map / Zone Memory Error
E30
Display shows E30; mower reports internal sensor bus error and may not start.
Internal Sensor Bus Communication Fault
Symptom
Robot lawnmower does not detect or avoid flowerbeds or trees even though the boundary wire is installed.
Perimeter Containment Ineffective
Symptom
Robot lawnmower does not return to the charging station and stops with a low battery in the yard.
Docking / Return-to-Base Failure
Symptom
Robot lawnmower emits a burning smell or shows signs of overheating around the motor area.
Motor Overheating / Electrical Overload
Symptom
Robot lawnmower frequently gets stuck or high-centered on small bumps, roots, or lawn edges.
Ground Clearance / Traction Issue
Symptom
Robot lawnmower is excessively noisy during operation, with grinding or rattling sounds from underneath.
Mechanical Noise / Bearing Wear
Symptom
Robot lawnmower is leaking rust-colored water or shows corrosion on metal parts underneath.
Corrosion / Water Ingress Damage
Symptom
Robot lawnmower leaves clumps of grass and the cut quality is poor or uneven.
Poor Cut Quality / Dull Blades
Symptom
Robot lawnmower leaves uncut strips of grass and misses areas within the boundary.
Coverage Pattern / Navigation Inefficiency
Symptom
Robot lawnmower occasionally shuts off completely without any error message.
Intermittent Power Loss
Symptom
Robot lawnmower runs for a much shorter time than it used to before needing to recharge.
Reduced Runtime / Battery Capacity Loss
Symptom
Robot lawnmower vibrates excessively, especially when the blades are running.
Vibration / Imbalanced Cutting System
Symptom
Robot lawnmower’s display is foggy or has condensation inside the screen.
Display Moisture Ingress
Symptom
Robot lawnmower’s front caster wheel does not swivel freely, causing drag and poor turning.
Front Caster Wheel Seizure
Symptom
Robot lawnmower’s time-based schedule does not trigger mowing even though the clock is correct.
Scheduling / Timer Malfunction
| Error Code | Symptom | Fault Type | Guide |
|---|---|---|---|
| E01 |
Robot will not start mowing; display shows E01 immediately after power-on or when START is pressed.
|
Main Power Supply / Battery Protection Fault | View Details |
| E02 |
Robot stops and displays E02 shortly after leaving the charging station; may beep and shut down.
|
Low Battery Voltage Under Load | View Details |
| E03 |
Display shows E03 and the mower will not leave the charging station.
|
Charging Station Communication Fault | View Details |
| E04 |
Mower displays E04 and stops; often occurs when trying to start a mowing cycle away from the base.
|
Boundary Wire Signal Not Detected | View Details |
| E05 |
Robot stops near the edge of the lawn and shows E05; may not detect the boundary correctly.
|
Weak Boundary Signal / Interference | View Details |
| E06 |
Mower displays E06 and stops when encountering obstacles; bumper may feel stuck.
|
Front Bumper / Collision Sensor Fault | View Details |
| E07 |
Display shows E07 and the mower refuses to start; often after being lifted or tilted.
|
Tilt / Lift Sensor Fault | View Details |
| E08 |
Mower stops and shows E08; blades do not spin when mowing should start.
|
Blade Motor Overload / Stall | View Details |
| E09 |
Mower displays E09 and stops; wheels may jerk or not move at all.
|
Drive Motor Overcurrent / Stall | View Details |
| E10 |
Display shows E10; mower may move but blades do not start, or vice versa.
|
Main Control Board Communication Error | View Details |
| E11 |
Mower shows E11 and refuses to start; often after rain or washing.
|
Rain Sensor / Moisture Detection Fault | View Details |
| E12 |
Display shows E12; mower may not respond to keypad or app commands.
|
User Interface / Keypad Communication Error | View Details |
| E13 |
Mower shows E13 and stops when lifted or when passing over bumps.
|
Front Lift Sensor Triggered / Fault | View Details |
| E14 |
Display shows E14; mower may not dock correctly or overshoots the charging station.
|
Docking Alignment / Infrared Receiver Fault | View Details |
| E15 |
Mower shows E15 and stops; GPS-based navigation or app location may be inaccurate.
|
GPS Module Communication Error | View Details |
| E16 |
Display shows E16; mower may not connect to Wi‑Fi or mobile app.
|
Wi‑Fi / Connectivity Module Fault | View Details |
| E17 |
Mower shows E17 and stops; often when climbing or descending slopes.
|
Incline Overload / Slope Exceeded | View Details |
| E18 |
Display shows E18; mower may stop randomly with no obvious obstacle.
|
Obstacle Sensor / Ultrasonic Sensor Fault | View Details |
| E19 |
Mower shows E19 and will not start; child lock icon may be displayed.
|
Safety Lock / PIN Code Error | View Details |
| E20 |
Display shows E20; mower may shut down due to high internal temperature.
|
Overtemperature Protection | View Details |
| E21 |
Mower shows E21 and stops; often after hitting a solid obstacle.
|
Chassis Shock / Impact Detected | View Details |
| E22 |
Display shows E22; mower may not detect when it is on the charging station.
|
Charging Contact / Dock Detection Fault | View Details |
| E23 |
Mower shows E23 and stops; cutting height cannot be adjusted or is stuck.
|
Cutting Height Motor / Actuator Fault | View Details |
| E24 |
Display shows E24; mower may behave erratically or reboot unexpectedly.
|
Firmware / Software Integrity Error | View Details |
| E25 |
Mower shows E25; blade speed is unstable or too low even in light grass.
|
Blade Motor Speed Sensor Fault | View Details |
| E26 |
Display shows E26; one wheel spins faster or slower than the other, causing crooked paths.
|
Wheel Encoder / Speed Sensor Fault | View Details |
| E27 |
Mower shows E27; internal clock or schedule is lost after power-off.
|
Real-Time Clock / Backup Power Fault | View Details |
| E28 |
Display shows E28; mower cannot be paired with the mobile app via Bluetooth.
|
Bluetooth Module Fault | View Details |
| E29 |
Mower shows E29; internal memory for zones or maps cannot be accessed.
|
Map / Zone Memory Error | View Details |
| E30 |
Display shows E30; mower reports internal sensor bus error and may not start.
|
Internal Sensor Bus Communication Fault | View Details |
| – |
Robot lawnmower does not detect or avoid flowerbeds or trees even though the boundary wire is installed.
|
Perimeter Containment Ineffective | View Details |
| – |
Robot lawnmower does not return to the charging station and stops with a low battery in the yard.
|
Docking / Return-to-Base Failure | View Details |
| – |
Robot lawnmower emits a burning smell or shows signs of overheating around the motor area.
|
Motor Overheating / Electrical Overload | View Details |
| – |
Robot lawnmower frequently gets stuck or high-centered on small bumps, roots, or lawn edges.
|
Ground Clearance / Traction Issue | View Details |
| – |
Robot lawnmower is excessively noisy during operation, with grinding or rattling sounds from underneath.
|
Mechanical Noise / Bearing Wear | View Details |
| – |
Robot lawnmower is leaking rust-colored water or shows corrosion on metal parts underneath.
|
Corrosion / Water Ingress Damage | View Details |
| – |
Robot lawnmower leaves clumps of grass and the cut quality is poor or uneven.
|
Poor Cut Quality / Dull Blades | View Details |
| – |
Robot lawnmower leaves uncut strips of grass and misses areas within the boundary.
|
Coverage Pattern / Navigation Inefficiency | View Details |
| – |
Robot lawnmower occasionally shuts off completely without any error message.
|
Intermittent Power Loss | View Details |
| – |
Robot lawnmower runs for a much shorter time than it used to before needing to recharge.
|
Reduced Runtime / Battery Capacity Loss | View Details |
| – |
Robot lawnmower vibrates excessively, especially when the blades are running.
|
Vibration / Imbalanced Cutting System | View Details |
| – |
Robot lawnmower’s display is foggy or has condensation inside the screen.
|
Display Moisture Ingress | View Details |
| – |
Robot lawnmower’s front caster wheel does not swivel freely, causing drag and poor turning.
|
Front Caster Wheel Seizure | View Details |
| – |
Robot lawnmower’s time-based schedule does not trigger mowing even though the clock is correct.
|
Scheduling / Timer Malfunction | View Details |
No matching codes found
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