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HusqvarnaAutomower® 535 AWD EPOS®
Robot mower. Spare parts with Husqvarna’s own order codes, and the troubleshooting chapter of the operator’s manual.
Photograph: a robot mower. We hold no photograph of this exact machine, and we would rather say so than pass one off.
What actually breaks
Open the problem that matches yours. Everything inside comes from the troubleshooting chapter of the operator’s manual Husqvarna publishes for this model — a 64-page document we read on 10 September 2026.
Fault messages shown on the display 130 lines
Husqvarna sets this out as a table with the columns “Message”, “Cause”, “Action”. We print the lines in the maker’s order.
- Trapped
- The product is stuck in a small area behind a number of obstacles.
- Examine if there are any obstacles which make it hard for the product to move away from this location.
- Wheel motor blocked
- Grass or other object has wrapped around the drive wheel.
- Examine the drive wheel and remove the grass or other object.
- Wheel drive problem
- Cutting system blocked
- Grass or other object has wrapped around the blade disc.
- Examine the blade disc and remove the grass or other object.
- The blade disc lies in a pool of water.
- Move the product and prevent the collection of water in the work area.
- 42 - Troubleshooting
- Wrong PIN code
- Wrong PIN code has been entered. Five attempts are permitted, and the product is then blocked for a period of time.
- Enter the correct PIN code. If the PIN code is incorrect, use the link in the app to send the
- PIN code to your registered e-mail address.
- If you have not registered the e-mail address, contact your local Husqvarna representative.
- Empty battery
- For an installation with boundary wire:
- The product cannot find the charging station.
- Change the position of the guide wire. Refer to To install the guide wire on page 28.
- Check the installation settings about how to find the charging station. Refer to To find the charging station on page 33.
- For an EPOS™ installation:
- The product cannot find the charging station.
- The product has no accurate position and cannot find the charging station.
- There is an obstacle that causes the product to not find the charging station.
- The battery is spent.
- Replace the battery. Refer to Battery on page 41.
- The charging station’s antenna is defective.
- Check if the indicator lamp in the charging station flashes red. Refer to LED indicator of the charging station on page 50.
- Slipped
- The product is caught in something and has been slipping.
- Free the product and rectify the reason for the lack of drive. If it is due to wet grass, wait until the lawn has dried before using the product.
- The work area includes a steep slope.
- Maximum guaranteed slope is 70%. Steeper slopes should be isolated. Refer to To put the boundary wire in a slope on page 24.
- For an installation with boundary wire:
- The guide wire is not installed correctly in a slope.
- Make sure that the guide wire is installed diagonally across the slope. Refer to To install the guide wire on page 28.
- Wheel motor overloaded
- The product is caught in something.
- Free the product and rectify the reason for the lack of drive. If it is due to wet grass, wait until the lawn has dried before using the product.
- Charging station blocked
- The contact between the charging strips and contact strips may be poor and the product has made a number of attempts to charge.
- Put the product in the charging station and check that the charging strips and contact strips make good contact. Clean the contact and charging plates.
- An object causes a blockage and the product cannot enter the charging station.
- Remove the object.
- The baseplate is tilted or bent.
- Make sure that the baseplate is put on level ground.
- Stuck in charging station
- The product slips on the baseplate.
- Clean the baseplate.
- There is an object in the way of the product preventing it from leaving the charging station.
- Remove the object.
- Troubleshooting - 43 Upside down
- The product is leaning too much or has turned over.
- Turn the product the right way up.
- Mower tilted
- The product is tilted more than the permitted slope.
- Move the product to a flat area.
- Lifted
- A blockage has activated the lift senors and caused the product to stop.
- Remove the product from the blockage. If the problem remains it requires action by authorized service technician.
- Lifted in link arm
- A blockage has activated the lift sensor in the link arm and caused the product to stop.
- Remove the product from the blockage. If the problem remains it requires action by authorized service technician.
- Slope too steep
- The product stopped because the slope is too steep.
- Change the installation of the work area to exclude this steep part of the work area. Refer to To examine where to put the boundary wire on page 23.
- Alarm! Mower switched off
- The alarm was activated because the product was set to OFF.
- Adjust the security level in the Security menu, refer to Security settings on page 34.
- Alarm! Mower stopped
- The alarm was activated because the product was stopped.
- Alarm! Mower was moved
- The alarm was activated because the product was moved.
- Alarm! Outside geofence
- The alarm was activated because the mower was outside its GeoFence.
- Adjust the theft protection area (GeoFence) in Husqvarna Fleet Services™.
- Electronic problem
- Temporary electronic or firmware related issue.
- Restart the product.
- If the problem remains, the message requires action by authorized service technician.
- Loop sensor problem
- Tilt sensor problem
- Temporary problem
- STOP button problem
- Ultrasonic problem
- GPS navigation problem
- Angular sensor problem
- Switch cord problem
- Invalid sub-device combination
- Invalid system configuration
- Lift sensor problem
- Collision sensor problem
- Safety function faulty 44 - Troubleshooting
- FlexiFence problem
- The battery of the FlexiFence accessory is low. The FlexiFence accessory does not operate when the battery is empty. The product can cut in the stay-out zone if you start the product before you charge the FlexiFence accessory.
- Park the product and charge the FlexiFence accessory before you start the product.
- The temperature of the FlexiFence accessory is higher than the maximum limit and is set to off.
- Put the product in an area with protection from the sun. Let the temperature of the
- FlexiFence accessory decrease before you start the product.
- Temporary battery problem
- Temporary battery or firmware related issue.
- Restart the product.
- If the problem remains, the message requires action by authorized service technician.
- Battery problem
- Battery temperature outside limits
- The product does not operate if the battery temperature is too high or too low.
- The product starts to operate again when the temperature is between the set limits and the schedule settings let the product to operate.
- Make sure that the charging station is put in an area with protection from the sun.
- Charging system problem
- There is corrosion or dirt on the charging plates and contact plates.
- Restart the product. Clean the charging plates on the product and the contact plates on the charging station.
- Temporary electronic or firmware problem in the product.
- Restart the product. If the problem stays, speak to your approved servicing dealer.
- Charging current too high
- Wrong or faulty power supply unit.
- Restart the product.
- If the problem remains, the message requires action by authorized service technician.
- Connectivity problem
- Problem with the cellular communication module.
- Restart the product.
- If the problem remains, the message requires action by authorized service technician.
- Troubleshooting - 45 Outside work area
- The boundary wire connections to the charging station are crossed.
- Make sure that the boundary wire is connected correctly. Refer to To examine where to put the boundary wire on page 23.
- The boundary wire is too close to the edge of the work area.
- Make sure that the boundary wire has been laid according to the instructions. Refer to To install the boundary wire on page 28.
- The boundary wire, virtual boundary or virtual
Further checks in the same chapter 247 lines
Husqvarna sets this out as a table with the columns “Message”, “Cause”, “Action”. We print the lines in the maker’s order.
- Collision sensor problem, front/rear
- Collision
- A blockage has caused the product to stop.
- Remove the product from the blockage and examine the cause of the stop.
- The body of the product cannot move freely around the chassis.
- Remove dirt and unwanted material between the chassis and the body to make sure that the body of the product can move freely around the chassis.
- The body of the product is not installed correctly in the rubber dampers.
- Make sure that the rubber dampers are attached correctly in the body of the product and in the chassis. If the problem remains, the message requires action by authorized service technician.
- Destination not reachable
- The product cannot reach the destination because there is a stay-out blocking the way to the work area.
- Edit or remove the stay-out zone or make a new installation of the work area.
- For EPOS™ installation, there is no transport path to the work area.
- Edit or remove the stay-out zone or make a new installation of the work area.
- For EPOS™ installation, the way back to the charging station is blocked by an obstacle.
- Remove the obstacle.
- For EPOS™ installation, the way to the maintenance point is blocked by an obstacle.
- Destination blocked
- The way of the destination is blocked by an obstacle.
- Remove the obstacle that blocks the way to the destination.
- The way of the destination is blocked by a stay-out zone.
- Edit or remove the stay-out zone or make a new installation of the work area.
- For EPOS™ installation, there is no transport path to the work area.
- Make a transport path to the work area.
- Battery needs replacement
- The battery state of health is low.
- Replace the battery. Speak to your authorized service technician.
- Battery near end of life
- The battery state of health is critically low.
- Replace the battery. Speak to your authorized service technician.
- Troubleshooting - 47 No loop signal
- The power supply or the voltage-cable are not connected.
- Examine the LED status on the charging station. If the LED is not lit, it indicates that there is no power. Examine the power outlet connection and whether an earth-fault breaker has tripped. Make sure that the low-voltage cable is connected to the charging station.
- The power supply or low-voltage cable are damaged.
- Replace the power supply or low-voltage cable.
- For a wire installation, the boundary wire is not connected to the charging station.
- Make sure that the boundary wire connectors are fitted properly to the charging station. Replace connectors if damaged. Refer to To install the boundary wire on page 28.
- For a wire installation, the boundary wire is broken.
- Check the signal given by the LED on the charging station. If the LED indicates break in the boundary wire, find out where the break is. Replace the damaged section of the loop with a new loop wire and splice using an original coupler. Refer to Find breaks in the loop
- wire on page 52.
- ECO mode is activated and the product has attempted to start outside the charging station.
- Put the product in the charging station. Start the product.
- The product does not find the loop signal from the charging station.
- Put the product in the charging station and generate a new loop signal. Refer to New loop signal on page 34.
- For a wire installation, the boundary wire is crossed on its way to and from an island.
- Make sure that the boundary wire is installed correctly. Refer to To install the boundary wire on page 28.
- Disturbances from metal objects (fences, reinforcement steel) or buried cables.
- For a wire installation, move the boundary wire and/or make more islands in the work area to increase the signal strength.
- For a wire installation, the product is too far from the boundary wire.
- Redo the installation of the boundary wire so that all parts of the work area is maximum 35 m / 115 ft. from the boundary wire.
- No charging station signal
- The power supply or the low-voltage cable is not connected.
- Do a check of the LED indicator of the charging station. If the LED indicator is off, the charging station has no power. Do a check of the power outlet and the earth-fault breaker.
- Make sure the low-voltage cable is connected to the charging station.
- ECO mode is enabled. The product tried to start outside the charging station.
- Put the product in the charging station. Start the product.
- The product cannot find the loop signal from the charging station.
- Put the product in the charging station. Make a new loop signal for the charging station.
- Metal objects or buried cables cause signal interference.
- Move the charging station to a new position.
- 48 - Troubleshooting
- Invalid firmware configuration
- The firmware in the product is invalid.
- Put the product in the charging station and update the firmware via FOTA. If the problem remains, speak to your authorized service technician.
- Map problem
- The map object file is incorrect
- Do a check of the map in the app. Adjust the map and save it.
- Delete the map and do a new installation.
- Work area tampered with
- The charging station or the reference station was moved.
- Do a new installation of the map.
- Guide 1/2/3 not found
- The guide wire is not connected to the charging station.
- Check that the guide wire’s connector is tightly connected to the charging station. Refer to To install the guide wire on page 28.
- Break in the guide wire.
- Find out where the break is. Replace the damaged section of the guide wire with a new loop wire and splice using an original coupler.
- The guide wire is not connected to the boundary loop.
- Check that the guide wire is connected correctly to the boundary loop. Refer to To install the guide wire on page 28.
- Searching for satellites
- Weak satellite signal to the reference station.
- The satellite signal is temporarily weak. The product will start to operate when the satellite signals are good.
- Examine the installation of the reference station.
- Weak satellite signal to the product.
- The satellite signal is temporarily weak. The product will start to operate when the satellite signal is good.
- Examine if there is an object between the product and the sky that causes interference with the satellite signal. Remove the object or do a new installation to not include these parts in the work area. Refer to Installation of the map objects on page 18.
- Connection changed
- New loop signal successfully changed.
- No action.
- Connection NOT changed
- Failed to change the loop signal.
- Create a new loop signal, try several times. If the problem remains, the message requires action by authorized service technician. Refer to New loop signal on page 34.
- Troubleshooting - 49 Reference station communication problem
- The product is not connected to the reference station.
- Do a pairing operation between the product and the reference station.
- The reference station is not installed correctly.
- Examine the installation of the reference station.
- The product does not receive the radio signal from the reference station in all areas where the product operates.
- Test if the product has radio signal from the reference station in all of the work area. If not, make a new installation of the reference station or a new installation of the map. Refer to Installation of the map objects on page 18.
- Power failure.
- Examine and correct the cause for the power failure of the reference station.
- The LED indicator on the reference station shows that the reference station has an error.
- Disconnect the power to the reference station and connect it again to restart the reference station. Refer to the Operator's manual for the reference station. If the problem stays, speak to your approved servicing dealer.
- There is interference with another reference station or other radio systems in the area.
- Restart the product. If the problem stays, speak to your approved servicing dealer.
- 8.3 LED indicator of the charging station
- The LED indicator of the charging station is green when the installation is correct. If the LED indicator of the charging station is not green, follow the troubleshooting table below.
- Speak to your local Husqvarna representative or go to www.husqvarna.com for more information.
- LED indicator
- Cause
- Action
- Constant green
- The signals of the charging station are good.
- No procedure is necessary.
- Flashes green
- The signals of the charging station are good and ECO mode is enabled.
- No procedure is necessary.
- Flashes blue
- The boundary wire is not connected to the charging station.
- Connect the boundary wire to the charging station.
- The boundary wire is damaged.
- Replace the damaged section of the boundary wire with new boundary wire.
- Flashes red
- Interference in the antenna of the charging station.
- Speak to your local Husqvarna representative.
- Constant red
- Error in the circuit board or incorrect power supply in the charging station.
- The error must be corrected by an authorized service technician. Speak to your local Husqvarna representative.
- 50 - Troubleshooting 8.4 Symptoms
- If your product does not work as expected, follow the symptoms guide below.
- There is a FAQ (Frequently Asked Questions) on www.husqvarna.com which provides more detailed answers to a number of standard questions. Contact your local Husqvarna representative if you still cannot find the reason for the fault.
- Symptoms
- Cause
- Action
- The product has difficulty docking.
- The boundary wire is not laid in a long straight line that is far enough out from the charging station.
- Check that the charging station has been installed according to the instructions. Refer to To install the boundary wire on page 28 The charging station is on a slope.
- Place the charging station on a surface that is entirely level. Refer to To examine where to put the charging station on page 22.
- The product runs at the wrong time.
- The clock needs to be set.
- Set the clock. Refer to Time & date on page 35.
- The start and stop times for mowing are incorrect.
- Reset the start time and change the Schedule settings. Refer to Schedule on page 31.
- The product vibrates.
- Damaged blades lead to imbalance in the cutting system.
- Inspect the blades and screws and replace them if necessary. Refer to Replacement of the blades on page 40.
- Too many blades in the same position lead to imbalance in the cutting system.
- Check that only one blade is fitted at each screw.
- Different versions (thickness) of Husqvarna blades are used.
- Check if the blades are of different versions.
- The product runs, but the blade disc does not rotate.
- The product searches for the charging station.
- No action. The blade disc does not rotate when the product is searching for the charging station.
- The battery is empty and you put the product in the charging station, but it does not charge and cannot be set to ON.
- If the battery has been deeply discharged, it will take a long time to charge the battery and before the product can be set to ON.
- Keep the product in the charging station for 24 hours and test if the product can be set to ON. If the problem remains, speak to your authorized service technician.
- The product mows for shorter periods than usual between charges.
- Grass or other foreign object blocks the blade disc.
- Remove and clean the blade disc. Refer to To clean the blade disc on page 39.
- The battery is spent.
- Replace the battery. Refer to Battery on page 41.
- Both the mowing and charging times are shorter than usual.
- The battery is spent.
- Replace the battery. Refer to Battery on page 41.
- The product is parked for hours in the charging station.
- The STOP button has been activated.
- Make sure that the START button is pushed down.
- Parking mode is activated.
- Select the operating mode in Husqvarna
- Fleet Services™.
- The product is not allowed to operate if the battery temperature is too high or too low.
- Check that the charging station is placed in an area with protection from the sun.
- Troubleshooting - 51 Symptoms
- Cause
- Action
- Uneven mowing results.
- The product works too few hours per day.
- Increase the mowing time. Refer to Schedule on page 31.
- The settings for Lawn coverage function are incorrect in relation to the layout of the work area.
- Examine the settings for the Lawn coverage function. Refer to Lawn coverage.
- The shape of the work area requires the use of Area 1-5 for the product to find its way to all remote areas.
- Use Area 1-5 to steer the product to a remote area. Refer to Lawn coverage on page 34.
- The work area is too large.
- Try to limit the work area or extend the work time. Refer to Schedule on page 31.
- Blunt blades.
- Replace all the blades. Refer to Replacement of the blades on page 40.
- Long grass in relation to the set cutting height.
- Increase the cutting height and then successively lower it.
- Accumulation of grass by the blade disc or around the motor shaft.
- Check that the blade disc rotates freely and easily. If not, screw off the blade disc and remove grass and foreign objects. Refer to To clean the blade disc on page 39.
- The product is not connected to the Husqvarna Fleet
- Services™ app.
- The product has not been connected to the app before and the product is not included in the list My mowers in the Husqvarna Fleet
- Services™ app.
- Do a pairing operation between the product and the mobile device. To do a pairing operation with the Husqvarna Fleet Services™ on page 17.
- The product only has Bluetooth® (short range) connection with the Husqvarna
- Fleet Services™ app and not cellular (long range) connection.
- The product does not have cellular connection to the Husqvarna Fleet Services™ app.
- Open the Husqvarna Fleet Services™ app on your mobile device and do a new pairing operation.
- You cannot connect with the product with an additional mobile device.
- Only one mobile device can be connected to the product with Bluetooth® at the same time.
- Disable the Husqvarna Fleet Services™ app in all other connected devices. If the problem stays, set the connected mobile device to
- OFF and start it again. If the problem stays, speak to your dealer.
- The cellular connection has worked before, but does not work now.
- There is a problem with the cellular connectivity.
- Make sure that you have cellular coverage in the area.
- Restart the product.
- If a new firmware is available in the app, install it to make sure that you have the newest firmware.
- Make sure that you have the newest version of the Husqvarna Fleet Services™ app installed.
- If the problem stays, speak to your dealer.
- 8.5 Find breaks in the loop wire
- Breaks in the loop wire are usually the result of unintentional physical damage to the wire such as when gardening with a shovel. In countries with ground frost, also sharp stones that move in the ground can damage the wire. Breaks can also occur due to the wire being
- stretched excessively during installation.
- 52 - Troubleshooting
- Mowing the grass too low right after the installation can damage wire insulation. Damage to the insulation may not cause disruptions until several weeks or months later. To avoid this, always select the maximum cutting height the first weeks after installation and then lower
- the height one step at a time every second week until the desired cutting height has been reached.
- A defective splicing of the loop wire can also lead to disruptions several weeks after the splice was done.
- A faulty splice can, for example, be the result of the coupler not being pressed together hard enough with a pair of pliers, or that a coupler of lower quality than the original coupler has been used. Please first check all known splices before further troubleshooting is done.
- A wire break can be located by gradually halving the distance of the loop where the break may have occurred until there is only a very short section of the wire left.
- The following method does not work if ECO mode is activated. Make sure first that ECO mode is turned off.
- Refer to ECO mode on page 32.
- 1.
- Check that the indicator lamp in the charging station flashes blue, which indicates a break in the boundary loop. Refer to LED indicator of the charging station on page 50.
- 2.
- Check that the boundary wire connections to the charging station are properly connected and not damaged. Check that the indicator lamp in the charging station is still flashing blue.
- AR
- AL
- G1 POWER 3.
- Switch the connections between the guide wire and the boundary wire in the charging station.
- Start by switching connection AL and G1. Some models have additional guide wires (G2, G3). The same procedure can be followed for them.
- If the indicator lamp is lit with a solid green light, then the break is somewhere on the boundary wire between AL and the point where the guide wire is connected to the boundary wire (thick black line in the illustration).
- Guide
- GUIDE
- AL
- To rectify the fault you will need boundary wire, connector(s) and coupler(s):
- a) If the suspected boundary wire is short then it is easiest to exchange all of the boundary wire between AL and the point where the guide wire is connected to the boundary wire (thick black line).
- b) If the suspected boundary wire is long (thick black line) then do as follows: Put AL and G1 back to their original positions. Then disconnect
- AR. Connect a new loop wire to AR. Connect the other end of this new loop wire at the middle of the suspected wire section.
- Troubleshooting - 53 AR
- If the indicator lamp now is green, then the break is somewhere in the wire between the disconnected end to the point where the new wire is connected (thick black line below). In that case, move the connection for the new wire closer to the disconnected end (roughly at the middle of
- the suspected wire section) and check again if the indicator lamp is green.
- Continue until only a very short section of the wire remains which is the difference between a solid green light and a flashing blue light. Then follow instruction in step 5 below.
- 4.
- If indicator lamp still flashes blue in step 3 above: Put AL and G1 back in their original positions. Then switch AR and G1. If indicator lamp now is lit with a solid green light then disconnect
- AL and connect a new boundary wire to AL.
- Connect the other end of this new wire at the middle of the suspected wire section. Follow the same approach as in 3a) and 3b) above.
- 5.
- When the break is found, the damaged section must be replaced with a new wire. Always use original couplers.
- 54 - Troubleshooting 9 Transportation, storage and disposal
Why we quote instead of rewriting. The manual is laid out as a table. Read by machine, a PDF loses the boundaries between columns, and pairing a symptom with the wrong remedy would give you a page that is confidently wrong rather than obviously broken. So we keep the maker’s order and words, and tell you how the table is built. The manual itself is linked further down.
Parts & prices
Every code below is Husqvarna’s own, read from the maker’s parts pages for this exact model. The code is printed on the part itself — on a label, moulded into the plastic or stamped in the metal. Read it off the broken part and type it here to find it straight away.
We hold no photograph of the individual parts: Husqvarna does not publish them, and we would rather say so than show you the wrong picture. Prices are the maker’s United States list prices on the day we read them — an order of magnitude, not a quote. The buttons search shops in your own country, and those shops pay us a commission.
Where to buy
The search opens in your own country’s shop, in that shop’s language, with our tracking — the shop pays us a commission, you pay the same price.
Tools you’ll need
Chosen for this family, not a generic list. Prices and availability come from the shop in your country, with our tracking.
Specifications
Copied field for field from the manufacturer’s own product page on 10 September 2026, in the maker’s units. We do not convert them: a rounded conversion is how a torque figure quietly becomes wrong.
Manuals & documents
We link the maker’s documents instead of re-hosting them, so you always open the version Husqvarna is publishing today.
Other machines in this family
Machines in the same family for which we also have the maker’s codes, prices and troubleshooting chapter. The whole family →
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Our sources
- Husqvarna support 24 specification fields and 19 parts with the maker’s code and list price, read on 10 September 2026.
- Operator's Manual Published: 10/28/2025 5.84 MB, EN 64 pages, read on 10 September 2026. The troubleshooting chapter quoted above.
What is missing, said plainly. We hold no photograph of this exact machine, no repair times and no failure statistics — nobody publishes those honestly. Prices are Husqvarna’s United States list prices and will differ in your country. We are not a dealer: we do not stock parts, and the buttons search shops that pay us a commission.
TroubleAtlas Technical Team · Compiled from manufacturer documents read on 10 September 2026 · Last checked 26 September 2026 · How we verify

