MODEL REFERENCE
Roborock S4 Max
23 errors · 14 troubleshooting topics · 7 guides
The checks and guides below come from the official manuals for this model.
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Errors and spoken alerts
Spoken error numbers documented in the manual Error 1liDAR turret blocked
Remove anything blocking the LiDAR turret, check that it turns freely, then move the robot and restart.
Error 2bumper stuck
Lightly tap the bumper repeatedly to free trapped objects. If none come out, move the robot and restart.
Error 3wheel suspended
Move the robot so its wheels rest on the floor, then restart cleaning.
Error 4cliff sensor error
Move the robot away from raised edges and restart. Wipe the cliff sensors and, if needed, all sensors clean.
Error 5main brush jammed
Clean the main brush and its bearings before retrying.
Error 6side brush jammed
Remove and clean the side brush, then refit it.
Error 7main wheels jammed
Remove debris blocking the main wheels, move the robot to a new location and restart.
Error 8robot trapped
Clear the obstacles around the robot and retry.
Error 9dustbin or filter missing
Reinstall the dustbin and filter correctly. Replace the filter if the warning persists.
Error 10filter wet or blocked
Let the filter dry for at least 24 hours, clean it if required, and replace it if the warning persists.
Error 11strong magnetic field detected
Move the robot away from magnetic barrier tape and restart.
Error 12battery charge is low
Recharge the robot and retry.
Error 13charging error
Use a dry cloth to clean the charging contacts on the robot and dock, then retry charging.
Error 14battery temperature error
Wait until the battery temperature returns to normal before retrying.
Error 16robot tilted
Place the robot on level ground and restart.
Error 17side brush module error
Reset the system and contact Roborock if the fault remains.
Error 18vacuum fan error
Reset the system and contact Roborock if the fault remains.
Error 21vertical bumper pressed
Move the robot to release the vertical bumper and retry.
Error 22recharge sensor is dusty
Wipe dust from the robot’s recharge sensor and retry.
Error 23dock location beacon lost
Clean the dock’s location beacon and retry returning to the dock.
Error 24no-go zone or barrier tape detected
Move the robot away from the app’s virtual No-go zone or invisible wall and restart.
Error 26wall sensor is dirty
Wipe the wall sensor clean and retry.
Internal errorinternal system fault
Reset the system. Contact Roborock if the fault remains after the documented checks; a reset does not resolve every fault.
Troubleshooting
Find the problem you are experiencingRobot will not turn onView
Charge the robot on its dock. Use it only when its battery temperature is within 4–40 °C.
Robot will not chargeView
Check that the dock’s power indicator is on and both ends of its power cable are seated. Clean the robot and dock contact areas if contact is poor.
Charging is slowView
Charging slows at high or low temperatures to protect battery life. Wipe dirty charging contacts with a dry cloth.
Robot cannot find the charging dockView
Move the dock into an open area with fewer obstacles. Place the robot closer to it and retry.
Robot behaves abnormallyView
Restart the robot and retry.
Robot makes noise while cleaning2 steps
- Switch off and check the main brush, side brush and main wheels for trapped debris, then clean them.
- If the omni-directional wheel is jammed, remove it with a screwdriver for cleaning.
Cleaning is weak or debris falls outView
Empty the dustbin, clean a blocked filter and clear a jammed main brush.
Robot will not connect to Wi-Fi4 steps
- Reset Wi-Fi and retry with a strong signal.
- Install the current mobile app and select a supported S6 MaxV.
- Check router settings and contact Roborock if setup still fails.
- The robot supports 2.4 GHz Wi-Fi.
Scheduled cleaning does not startView
Keep the battery above 20% so a scheduled clean can begin.
Robot consumes power while dockedView
A small amount of power is drawn on the dock to maintain battery performance. Leaving it charged follows the manual’s normal use guidance.
First use needs a sixteen-hour chargeView
No sixteen-hour charge cycle is required for the first three uses. Use the robot once it is fully charged.
Cleaning does not resume after rechargingView
Check whether DND mode is preventing cleanup. A robot placed manually on the dock before returning for its own top-up charge will not resume that cleanup.
Robot cannot dock after Spot cleaning or being movedView
Spot cleaning or a large position change causes the map to be regenerated. If the dock is too far away, place the robot on it manually.
Robot misses areasView
Wipe the wall and cliff sensors with a soft dry cloth.
Guides
Instructions for use
Instructions from the manualSet up the dock and first charge3 steps
- Place the dock against a wall on level ground with at least 0.5 m free on either side and 1.5 m in front.
- Keep the locator beacon clear of direct sunlight and obstructions, and choose an area with good Wi-Fi.
- Seat the robot on the dock to charge.
Connect the app and reset Wi-Fi4 steps
- Open the top cover and hold Spot Cleaning and Recharge together until the Resetting WiFi alert sounds.
- A slowly flashing Wi-Fi indicator means setup mode is ready.
- Reconnect in the app, using a supported 2.4 GHz network.
- If left trying to connect for more than an hour, reset Wi-Fi again.
Routine maintenance
Instructions from the manualClean brushes and wheels5 steps
- Switch off before maintenance.
- Remove the main-brush cover, brush, bearing and cap, clear hair and refit them securely.
- Clean the main brush weekly and the side brush monthly, removing its retaining screw first.
- If the front wheel jams, use a small screwdriver to remove its axle, rinse wheel and axle, dry them and press them back into place.
- Its bracket is not removable.
Clean the dustbin and washable filter3 steps
- Empty and clean the dustbin weekly.
- Rinse the washable filter every two weeks with fresh water only, tap its frame to release dirt and let it dry completely, preferably for at least 24 hours.
- Avoid touching its surface with fingers, brushes or sharp objects.
Reset the system or restore factory settings2 steps
- Press Reset if the robot does not respond or cannot shut down; schedules, Wi-Fi and other settings return to defaults.
- If that fails, switch it on, press Recharge and hold Reset until Start restoring initial version is announced.
Update firmware and store the robotView
Update through the app with the robot docked and its battery above 20%. Keep it charged during normal use. For long storage, switch it off and recharge at least every three months.
Clean sensors and charging contacts2 steps
- Wipe the four cliff sensors, right-side wall sensor, charging contacts and main wheel monthly using a soft dry cloth.
- Clean the dock’s charging contacts monthly with a soft dry cloth.