husqvarna Automower Technical
37 fault codes documented
Automower runs at an angle or in an arc — Tilt sensor calibration or defect
This symptom describes the Automower not driving in a straight line, but rather at an angle or in an arc. This is typically due to an incorrectly calibrated tilt sensor or a defective tilt sensor.
Blade motor defect or Blade disc blocked — Blades cannot rotate freely
The blade disc is blocked by an object, or the blade motor itself is defective. This could also be a control box or main cable issue.
Both the mowing and charging times are shorter than usual — High temperatures or low battery capacity
This behavior indicates that both the mowing duration and the time spent charging are reduced. This can be normal in high ambient temperatures, but can also signal a problem with the battery's capacity.
Boundary wire sawtooth pattern — Mower struggles to follow boundary wire
The Automower is unable to find the correct loop signal strength for the set corridor width, causing it to move in a saw tooth pattern along the boundary wire while searching for strength.
Cannot pass narrow passage — Mower too wide for set corridor width
The corridor width setting is too high for the Automower to successfully navigate a narrow opening or passage while following the boundary wire.
Charging station blocked — Obstacle detected in N-field or defective N-coil
The Automower has collided with an obstacle in the N-field of the charging station, or the charging plate's N-coil is not functioning correctly.
Check ultrasonic — Frequent collisions at full speed
The mower has collided with obstacles at full speed multiple times, indicating a problem with the ultrasonic sensors or undetected objects. The mower will continue to operate at a reduced speed.
Collision sensor defective or Mower jammed — Problem with sensing obstacles
The Automower is jammed, or one or both collision sensors are not working correctly, possibly due to loose parts, sensor malfunction, or cabling issues.
Docking unsuccessful — Mower detects signal but cannot dock
The Automower detects signals from the charging station but is unable to complete the docking process successfully, possibly due to a defective N-coil in the charging plate.
Front loop sensor defect — Front loop sensor cable or card is faulty
This indicates a problem with the front loop sensor, which can be due to damaged cabling, a loose connection, or a defective sensor card itself. It affects the mower's ability to detect the boundary wire at the front.
Green LED double flash — Weak loop signal
The green LED on the charging station is flashing twice every other second, indicating a weak boundary loop signal. This may be due to the wire being too long or damaged.
Green LED single flash — Break in the loop signal
The green LED on the charging station is flashing once per second, indicating a break in the boundary loop wire and no signal is available.
Green LED solid, no loop function — Mower cannot detect the loop despite strong signal
The charging station's green LED is solid, indicating a good loop signal, but the Automower cannot find or function with the loop signal, suggesting a communication issue or a defective charging station circuit card.
Guide wire not followed — Automower cannot find charging station via guide wire
The Automower is set to follow the guide wire on the left side towards the charging station but cannot detect the necessary loop signal strength for the set corridor width.
Improperly installed battery — Battery not correctly seated or causing interference
This fault indicates that the battery in the Automower might not be installed correctly, potentially causing operational issues or interference with sensors.
Low battery voltage — No F-signal or N-signal from charging station
The Automower cannot find the charging station because there is no F-signal (remote) or N-signal (near) from the charging station. This will eventually lead to the mower stopping and displaying a 'Low battery voltage' message.
Mower lift — Mower trapped or lift sensor activated
The lift sensor has been activated, indicating the mower has become trapped or lifted. This can also mean an issue with the sensor or its setup.
No contact in charging station — Mower not making proper charging connection
The Automower is in the charging station but cannot establish proper contact for charging, possibly due to alignment issues, dirty contacts, or damaged cables.
No drive — Automower is caught or experiencing motor issues
This fault indicates that the Automower's drive system is not functioning. It can be due to the mower being physically caught or problems with the wheel motors.
No Guide-signal — Mower cannot follow guide wire
The Automower is unable to follow the guide wire because the charging station is not transmitting a Guide-signal.
No loop signal — Boundary wire broken or charging station power issue
This fault message means the mower isn't detecting the signal from the boundary wire. This can be caused by a break in the wire, a power issue with the charging station, or problems with internal components.
No remote boundary wire follow — Mower starts mowing instead of following boundary wire to remote area
The Automower fails to detect the loop signal strength after reversing out of the charging station, causing it to start mowing immediately instead of following the boundary wire to a remote area.
No remote guide wire follow — Mower starts mowing instead of following guide wire to remote area
After reversing out of the charging station, the Automower turns a full circle to find the guide wire signal but fails to find sufficient strength, leading it to start mowing instead of following the guide wire to a remote area.
Outside — Mower is outside the working area or detects a boundary issue
This fault message indicates that the Automower has detected an issue with the boundary wire or has gone outside the designated working area. This can happen if the boundary wire is incorrectly installed, too close to an edge, or if there's interference.
Rear loop sensor defect — Rear loop sensor cable or card is faulty
This fault suggests an issue with the rear loop sensor. The problem could stem from damaged or loose cabling connecting to the sensor, or the rear loop sensor card itself may be defective. An improperly installed battery can also cause interference.
Red bar on display during test - Value too high or too low
When you are performing a manual test of the Power/Motors components on your Husqvarna Automower, a red bar appearing next to a displayed value indicates that the measurement is outside the approved limits. This can apply to battery voltage, battery current, battery temperature, or the current from a solar cell panel if your model has one. A green bar indicates an approved value.
Stuck in charging station — Mower cannot exit the station
The Automower is unable to roll out of the charging station, often due to an obstruction or issues with the charging plate/strips.
The Automower vibrates — Blade disc is unbalanced or blades are damaged
If the Automower is vibrating during operation, it usually indicates a problem with the blade disc or the blades themselves, leading to an imbalance.
The Automower works at the wrong time — Mower operating schedule is incorrect
This symptom occurs when the Automower is mowing at times other than programmed. This could be due to an incorrectly set internal clock or incorrect start/stop time settings.
The battery is cooling — Battery temperature is too high
The mower's battery temperature is too high upon reaching the charging station, requiring it to cool down.
The mower mows for shorter periods than usual between charges — Obstruction or low battery capacity
This symptom describes the mower operating for less time than expected before needing to recharge. It can be caused by obstructions affecting the blade disc or a degradation in battery capacity.
Trapped — Automower is stuck or caught on an obstacle
This message indicates that the Automower has encountered an obstacle and become stuck or trapped. It might also be related to loose body screws or issues with collision sensors.
Uneven mowing results — Mower not performing optimally, grass length inconsistent
This symptom describes an issue where the grass is not being cut evenly across the working area. It can be due to insufficient working hours, a large area, dull blades, or incorrect settings.
Upside down — Mower has been lifted, turned over, or tilt sensor is faulty
This message appears if the Automower has been lifted off the ground or has turned over, triggering the tilt sensor. It can also indicate a defective or incorrectly calibrated tilt sensor.
Wheel drive system defect — Problem with wheel motor or related components
There is a defect in the wheel motor, control box, or the main cable harness affecting the drive system for a wheel.
Wheel motor blocked — Drive wheel cannot turn freely
An object is preventing a drive wheel from turning, or the wheel motor itself is faulty. This can also indicate an issue with the control box.
Wrong PIN code — Incorrect PIN entered, keypad is blocked
This message appears when an incorrect PIN code has been entered. After three incorrect attempts, the keypad will be blocked for five minutes.