Robot Mower Error Codes: Navimow, Mammotion, Husqvarna, Worx Lookup Table

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Find your code, read the meaning, do the first fix

Each of the four brands on this page tells you what went wrong in a different way. Navimow shows a four-digit number. Mammotion pushes a three- or four-digit fault code to the app. Husqvarna uses plain-English messages (“Trapped,” “No loop signal”). Worx uses E-numbers on the classic Landroid and a longer E-list on the Vision line. Every row below comes from a manufacturer manual or support page, linked in the table footer. If a code is not here, we did not find it in an official source, and you should check the app’s own description before trying anything. Across all four brands the pattern is the same: most codes clear with “remove the obstruction, put the mower on flat ground inside the boundary, press STOP, restart.”

Before you look anything up

Three things fix a surprising share of robot mower errors regardless of brand:

Power it off, clear the deck, power it on. Grass wrapped around the blade disc or a wheel is behind most “motor” and “blocked” codes. Wear gloves. Husqvarna’s Wheel motor blocked article is literally three steps: turn off, clean the wheels, restart.
Put it on flat ground inside the boundary before you clear the error. Navimow’s manual says this for a dozen codes. Clearing an error while the mower is tilted or outside the map just triggers the next one.
Check Wi-Fi band and battery before blaming firmware. Mammotion’s support site says LUBA “only supports the 2.4GHz WiFi connection.” Navimow’s manual lists “the Wi-Fi network is not 2.4 GHz” as a cause of connection failures. Both brands want a charged battery (Navimow says 50 percent or more) before an update.

Positioning errors (“weak signal,” “poor positioning,” Float instead of Fix) are a separate subject with their own fixes. We cover them in RTK signal lost: causes and fixes.

Segway Navimow error codes

Navimow mowers show “E” plus a four-digit code on the display and a pop-up in the app. Pressing STOP clears the code so you can fix the cause. The table is from the H-series user manual V2.1 (April 2023), the most recent Navimow manual we could locate with a full code list. The i-series manual uses the same four-digit convention but refers you to the app for meanings. Newer models (i2, X3, X4, H2) may add or renumber codes; if your app’s description differs from this table, trust the app. “First fix” is our shortening of the manual’s text.

Code	Meaning (manual wording)	First fix
1001	Mowing motor initialization failed	Keep the mower still, restart
1002	Mowing motor overvoltage protection	Press STOP. Use only a genuine battery
1003	Mowing motor undervoltage protection	Charge past 50% (green indicator), then press STOP
1004	Mowing motor overcurrent protection	Press STOP
1005	Mowing motor stall protection	Power off. Clear the blade disc. If grass is thick, cut it to 6 cm or less first. Restart
1008	Cutting height motor stall protection	Power off. Clear clippings or stones above the blade fender. Restart, test at 60 mm height
1009	Cutting height motor overcurrent protection	Same as 1008
1010	NCU self-check failure	Restart and resume mowing
1018	Cutting height motor control failure	Restart and resume mowing
1020	Battery overvoltage protection	Press STOP. If it persists, take the mower off the dock and contact support
1021	Battery undervoltage protection	Battery is over-discharged. If below 0 °C or above 48 °C, wait for 5 to 44 °C, charge to 50%, press STOP
1022	Battery discharging protection	Press STOP. If it persists, shut down immediately and contact support
1023	Battery charging protection	Press STOP. If it persists, take the mower off the dock and contact support
1024	Battery temperature is too high	Move to shade (operating range 0 to 40 °C), press STOP
1025	Battery temperature is too low	Move somewhere warm, press STOP
2010	Sensor system self-check failure	Restart, dock the mower
3001	Hub motor stall protection	Check for stuck wheels, remove debris, STOP then MOW+OK
3002	Hub motor overspeed protection	STOP then MOW+OK
3003	IMU bias error	Keep the mower level and still, restart
3004	Hub motor calibration error	Power off, lift rear wheels by the handle, power on, let the wheels spin and calibrate
3005	Hub motor short circuit protection	Restart, dock the mower
3006	Hub motor calibration corrupted	STOP then MOW+OK; if that fails, restart and dock
3007	Hub motor communication error	Restart, dock the mower
3008	Hub motor over temperature	Wait about 1 minute, STOP then MOW+OK. If it recurs in one spot, make that spot an off-limit island
3010	VCU self-check failure	Restart, dock the mower
4001	Storage system error	Restart, dock the mower
4003	ECU over temperature	Move to shade, press STOP
4004	VCU over temperature	Move to shade, press STOP
4007	Bluetooth link error	STOP then MOW+OK; if that fails, restart and dock
4008	IoT link error	Same as 4007
4010	Mower motor communication error	Same as 4007
4011	Charging station communication error	Confirm the dock is plugged in and the mower is within 200 m of it. STOP then MOW+OK
4013	Ultrasonic module communication error	Check the ultrasonic sensor cables, restart
4020	ECU system self-check failure	Restart, dock the mower
5001	Unable to connect GNSS antenna	Check the antenna is connected to the charging station, press STOP
5002	Charging station guiding wire error	Re-plug the charging station, press STOP
5003	Charging station overcurrent or overvoltage protection	Re-plug the charging station, press STOP
5005	GNSS antenna data error	Reconnect the GNSS antenna to the charging station, press STOP
6002	Mower is outside the boundary	Place it on open, flat ground inside the boundary, press STOP, wait for the blue light, MOW+OK
6003	Mower has turned over	Right it, put it inside the boundary or on the dock, STOP then MOW+OK. Make the spot an off-limit island if it repeats
6004 / 6005	Mower cannot return to the charging station	Clear the path, confirm the dock is level, STOP then HOME+OK. If the dock or antenna has moved since mapping, rebuild the map
6006	Bumper sensors triggered constantly	Remove obstacles or tap the bumper gently to release it, STOP then MOW+OK
6007	Mower is lifted	Place on flat ground, check the front wheels are not stuck, STOP then MOW+OK
6008	Bumper sensor triggered too many times	Remove obstacles, STOP then MOW+OK
6010 / 6011 / 6014 / 6015 / 6016 / 6018	Motion planning error	Move the mower to a flat spot inside the boundary, remove anything it is stuck on, STOP then MOW+OK. Make repeat spots off-limit islands
6017	Mower gets stuck in obstacles	Free it, STOP, HOME+OK. If it persists, check whether dock or antenna moved and remap
7001	IMU/TICKS data error	STOP then MOW+OK; restart if needed
7002	Fail to read VCU version	Same
7003	GPS data error	Same
7004	Compass data error	Same
7005	Localization data streaming fault	Same
7006	Localization recovery is not successful	Move to an open, flat area away from obstacles and complex terrain, press STOP, resume
8001	VisionFence sensor communication error	STOP then MOW+OK; restart if needed
8002	VisionFence sensor map error	Same
8003	Stained camera	Clean the lens, STOP then MOW+OK
8005	VisionFence sensor disconnected	Reconnect it, or disable VisionFence in app settings if you removed it on purpose
8006	VisionFence sensor system error	Restart the mower
4208	(i2 AWD, Network RTK mode) Mower lost connection with the charging station for an extended period	Listed in Navimow’s i2 AWD support FAQ, no fix text given. Restore the dock link and restart
Sources: Navimow H-series User Manual V2.1, section 5; Navimow i-series User Manual; Navimow i2 AWD support FAQ (code 4208). Codes 8001 to 8006 apply only when a VisionFence sensor is fitted. Codes 1006, 1007, 1011 to 1017, 3009, 4002 and others are not listed in the manual.

Two patterns worth noticing. Any 6xxx code is a position or motion problem, and the manual’s answer is nearly always the same: flat ground, inside the boundary, STOP, MOW+OK, and turn repeat-offender spots into off-limit islands. Any 5xxx code is about the charging station or its antenna cable. If you see 5001 or 5005 after a storm or after mowing near the dock with a string trimmer, check the antenna cable first.

Mammotion LUBA and YUKA fault codes

Mammotion sends fault codes as app notifications with a cause and a suggested step. The LUBA 2 AWD manual lists only “the most common issues.” The table is short for that reason. YUKA and LUBA 3 share the app; we have not seen a published code list specific to them. The positioning statuses below come from Mammotion’s support center and are the thing owners ask about most.

Code	Cause (manual wording)	First fix
316	The left cutting disc motor is overheating	Wait. It returns to normal once the motor cools, which can take several minutes
318	The sensor for the left cutting disc motor has failed	Restart. If it persists after a few restarts, contact support
323	The right cutting disc motor is overloaded	Check for a jammed disc and clear it, or raise the cutting height
325	The right cutting disc motor fails to start	Check for a jam. If clear, restart; contact support if it persists
326	The right cutting disc motor is overheating	Restart. Contact support if it persists after a few restarts
328	The sensor for the right cutting disc motor has failed	Restart. Contact support if it persists
1005	Low battery	Let it charge. It resumes at 80%
1300	The positioning status is poor	Wait for the robot to reposition. If it recurs, see the RTK section below
1301	The charging station has been moved	Put the charging station back where it was
1420	Timeout occurred while retrieving wheel speed data	Restart. Contact support if it persists
2713	Charging has been stopped due to low battery voltage	Restart. Contact support if it persists after a few restarts
2726	The battery is overcharged	Stop charging immediately. Contact support if it happens often
2727	The battery is over discharged	Recharge the robot
Source: Mammotion LUBA 2 AWD User Manual, “Fault Codes,” pages 94 to 95. The official manual is also hosted on support.mammotion.com.

Mammotion positioning status (the “POS” screen)

The app shows a positioning status, satellite counts for the robot (R), the reference station (B) and the satellites both can see (C, “co-viewing”), plus a signal-quality grade. Mammotion’s support article defines the statuses:

Status	Mammotion’s definition	Can it mow?	What it usually means
Fix	Accuracy under 10 cm, down to 2 cm with open sky	Yes	Normal
Float	Accuracy about 50 to 200 cm	No	Robot or reference station cannot see enough satellites, or signal quality is “weak” or “bad” because of trees, walls or fences
Single	Meter-level accuracy	No	With reference-station satellites at 0 and connection “None” or “Weak”: no correction data is reaching the robot. Check the station’s power and radio antenna
None	No positioning	No	Robot sees no satellites. Is it indoors, or is its rear covered by metal? Also check whether the reference station is off, flooded, or missing its radio antenna
Source: Mammotion support: About the NEW positioning information; What to do with the error Poor Positioning Status. Mammotion notes that a reading of more than 20 co-viewing satellites can still produce Float if signal quality is weak.

For the “Poor Positioning Status” error itself, Mammotion starts with two steps. Confirm the reference station is in open sky with a solid green LED (if the LED is off, check the power cable and adapter). Then look for obstacles behind the robot where it stopped, and edit the boundary to keep it away from them. The third step is sending a video, a POS screenshot and a log through the app. Also note the support warning. If you move the reference station, you must delete and recreate the map. The whole map is built relative to the station’s position.

Husqvarna Automower error messages

Husqvarna does not surface numeric codes to the owner. The Automower Connect app and the mower display show short messages, and each has its own support article. Here are the ones with published causes and fixes. For messages that cannot be cleared remotely (STOP pressed, tilt, collision), Husqvarna’s restart and reset guide explains the on-mower sequence: press STOP, enter the PIN, select start. A factory reset keeps the PIN, loop signal, date and language; a full wipe “like on a smartphone” is not possible.

Message	Meaning	First fix
No loop signal	Mower cannot read the boundary wire signal (on older models and Aspire R4, also the guide wire)	Look at the dock LED. Flashing blue: broken wire or loose connection at the station. Solid blue: wire connected but faulty. Check wire ends are fully inserted and contacts clean, then search for a break. Max wire distance is 35 m (115 ft), 15 m for Aspire R4
Wheel motor blocked	Grass or an object wrapped around a drive wheel	Turn off, clean the wheels and around them, restart
Cutting system blocked	Something is stopping the blade disc	Free it from the root or trampoline leg, clear grass from under the deck, check grass height (max 10 cm for most models, 6 cm for NERA/Aspire R6V, 4 cm for Aspire R4 and 105) and slope limits for your model
Trapped	Multiple loop or collision events in a short time	Move it clear, remove the obstacle, restart. If it always happens in one spot, add a stay-out zone or island. Check the work area is not too narrow
Upside down	Inclination sensor reads too high for safe operation	Right the mower. If it keeps happening, the slope is beyond spec; exclude it with a stay-out zone or move the wire
Outside work area	Loop signal says the mower is outside, not inside	Wire too close to a slope or obstacle (keep 35 cm margin), wire connected to the wrong pin, or an island wired in the wrong direction. On EPOS models, the virtual boundary is too close to an edge
Collision sensor problem	Collision sensors are activated	Free the mower, brush debris from between body and chassis, make sure the body sits correctly and moves freely, check grass height and cutting height, check wheels, then restart
Charging station blocked	Mower cannot dock after several attempts	Clean the charging strips and contact plates, clear the docking path
Empty battery / won’t charge	Battery too cold, too hot, or too deeply discharged after storage	Bring it indoors, put it on the station and leave it several hours. See also “Battery temperature outside limits”
Reference station communication problem (EPOS wire-free)	Mower lost contact with the EPOS reference station	Check the station’s power, restart the mower, unplug the station for one minute. On large or hilly lawns the signal may not cover everything: move the station, add a stay-out zone, or ask a dealer about a second station
Sources: Husqvarna Self-Service articles for No loop signal, Wheel motor blocked, Cutting system blocked, Trapped, Upside down, Outside work area, Collision sensor problem, Charging station blocked, Won’t charge / empty battery, Reference station communication problem. Husqvarna also publishes articles for Wheel drive problem, Wheel motor overloaded right/left, No drive and Alarm! Mower stopped; we have not summarized those here.

Husqvarna’s error list is wire-centric because most Automowers in US yards are still wire models. The one wire-free message, Reference station communication problem, is the EPOS equivalent of Mammotion’s Single status: the correction link is down.

Worx Landroid error codes

Worx has two code sets. Classic Landroids (M, L, S, and the current Vision Cloud’s wired predecessors) use E1 to E9 plus F1 for rain delay. Landroid Vision models use a longer list that reflects the camera. Both come from Worx.

Landroid classic (boundary wire models)

Code	Meaning	First fix
EE	Error unknown	Contact Worx customer service
F1	Rain delay	Not an error. It starts after the rain stops and the delay expires
E1	Boundary wire missing, or Landroid outside the wire	If it really is outside: power off, carry it inside, power on, start. If it is inside and the dock LED is green, the wire ends are reversed; swap them. If the LED flashes, check wire connections and look for a cut
E2	Wheel motor fault	Power off, move to a clear area, power on. If it repeats, flip it over and check nothing is blocking the wheels
E3	Blade motor fault	Power off, gloves on, flip it and clear the blade disc. Move to shorter grass or raise the cutting height
E4	Trapped	Power off, move to an obstacle-free area, power on. Check wheels if it repeats
E5	Lifted	Power off, move to a clear area, power on. If it repeats, check nothing is holding the front casters down or up
E6	Upside down (tilted)	Turn it upright
E7	Battery charge error	Battery over 55 °C: move the dock to shade. Too cold: it is winter storage time. Also check the dock pins against the charging strip and that the dock is on flat ground. If none of that, the power supply may be dead
E8	Find-home timeout	Carry it to the dock. On WR155, the manual ties this to boundary wire over its 984 ft maximum
E9	Mower locked	Enter the PIN. Worx’s wiki has a per-model walkthrough
Sources: Worx Landroid S WR130E user manual, “Error messages”; Worx Landroid L WR155 owner’s manual (text messages: “Outside working area,” “Wrong PIN,” “Blade motor fault,” “Wheels motor fault,” “Mower lifted,” “Wire missing,” “Can’t find charge station”); Worx wiki E1; Worx wiki E9.

Landroid Vision

Code	App message	First fix
E1	Outside boundary	Worx lists four cases: unclear lawn edge (flatten it, clear leaves and overgrowth), magnetic strip problem (keep it 32 cm from the edge, do not bury it), started outside the lawn (always start inside, near the dock), or traction loss on steep or wet edges
E2	Wheel motor error	Clear the wheels, restart
E3	Blade motor fault	Clear the blade disc, restart
E4	Landroid trapped	Free it, press Start
E5	Landroid lifted	Set it down, press Start
E6	Landroid upside down	Right it, press Start
E7	Battery charging error	Check temperature and dock contact
E8	Cannot find base	Carry it home, check the dock is reachable
E9	Lawn exploration required	Run the exploration so it learns the mowing zones
E10	Wi-Fi lock: unlock your Landroid to start working again	Unlock in the app
E11	Battery temperature out of range	Wait for it to cool or warm
E12	Camera lens is dirty / camera is blocked	Wipe the lens
E13	Camera error	Restart; contact Worx if it persists
E14	Insufficient fill light	Too dark for the camera. Mow in daylight or check the LED fill light
E15	Blade height adjustment blocked	Clear debris around the height mechanism
E16	Traverse fail	App message; check the path between zones
E17	RFID reader error	Restart; contact Worx if it persists
E20	Leaving charging station failed	Clear the area in front of the dock
E25	Firmware download fail	Move the dock closer to Wi-Fi, retry
Source: Worx wiki: Landroid Vision Error and Status Messages; E1 detail page. The wiki gives the code and message for every row but a detailed fix only for E1; the other “first fix” entries are the obvious step the message implies, not Worx text.

Most common across brands

Lay the four lists side by side and the same six problems show up with different names:

Problem	Navimow	Mammotion	Husqvarna	Worx	Universal first fix
Blade jammed or overloaded	1005	323, 325	Cutting system blocked	E3	Power off, gloves, clear the disc, raise the height, cut tall grass down first
Wheel blocked or stuck	3001, 6011, 6017	No published code	Wheel motor blocked, Trapped	E2, E4	Clear the wheels, move to open ground, make the spot a no-go zone
Tipped or lifted	6003, 6007	No published code	Upside down	E5, E6	Right it on flat ground, then clear the error. Exclude slopes beyond spec
Outside the boundary	6002	No published code	Outside work area	E1	Carry it inside, restart. If it repeats at one edge, give the boundary more margin
Battery too hot, cold, or flat	1021, 1024, 1025	1005, 2713, 2727	Empty battery, Battery temperature outside limits	E7, E11	Move the dock out of full sun, bring the mower indoors in freezing weather, charge several hours after storage. See winter storage
Positioning or reference link lost	5001, 5005, 7006	1300, Float, Single	Reference station communication problem	No published code	Check antenna cable and power, then antenna sky view. Full walkthrough in RTK signal lost

Blades and wheels are the mechanical majority. Every manufacturer’s first instruction is the same one: turn the power off before you put a hand under the deck. Positioning is the one that frustrates people because nothing is visibly wrong with the mower; the problem is the sky above it. If you are still shopping and your yard has heavy tree cover, that is the single best reason to read RTK vs LiDAR vs vision before you buy.

If a code repeats in the same place, every one of these manuals says the same thing in different words: stop fighting it and draw a no-go zone, stay-out zone, island, or off-limit area around it. A mower that skips one tree root is doing its job. One that stalls there three times a week is not.