Xiaomi Robot Vacuum S40C FAQ

Overview
1. Q: What is the Xiaomi Robot Vacuum S40C?
A: Xiaomi Robot Vacuum S40C is an intelligent integrated cleaning, vacuuming and mopping robot vacuum. It can complete the cleaning and mopping tasks independently at home, and return to the charging dock for charging after cleaning, greatly reducing the workload of floor cleaning.

2. Q: What are the features of the Xiaomi Robot Vacuum S40C?
A: The features of the Xiaomi Robot Vacuum S40C are as follows:
1. A large 2600mAh battery that provides extended cleaning time;
2. Powerful 5000Pa suction for deeper and more thorough cleaning, with convenient control options available via the Mi Home/Xiaomi Home APP.

3. Q: How to use the Power button of the Xiaomi Robot Vacuum S40C?
A: To use the Power button of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Press and hold for 3 seconds to turn on or off;
2. Press to clean/pause while turned on.

4. Q: How to use the Home button of the Xiaomi Robot Vacuum S40C?
A: To use the Home button of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Press to pause while running;
2. Press to start docking when it is paused;
3. Press to stop docking when it returns to dock;
4. Press and hold for 3 seconds to enable or disable the child lock.
Note:
Press any button on the robot vacuum to pause during operation or returning to the charging dock.

5. Q: What does the indicator on the Xiaomi Robot Vacuum S40C mean?
A: The meanings of the indicator on the Xiaomi Robot Vacuum S40C are as follows:
1. White: Working normally;
2. Breathing in white: In charging (medium/high battery level);
3. Blinking in white: Positioning/Returning to the charging dock;
4. Yellow: Wi-Fi disconnected;
5. Blinking in yellow: Running (low battery)/Awaiting connection/Robot vacuum error;
6. Breathing in yellow: In charging (low battery level);
7. Blinking in blue: Connecting to Wi-Fi/Updating;
8. Blue: Wi-Fi connected;
9. Off: Shut down/In sleep.

Product introduction and use
1. Q: What accessories come with the Xiaomi Robot Vacuum S40C?
A: The accessories that come with the Xiaomi Robot Vacuum S40C include: the Brush, Brush cover, and Dust compartment pre-installed on the main unit. Other accessories include the Mop pad and water tank assembly (with mounted mop pad), Side brush, Power supply, and Charging dock.


It is recommended to check all items against the accessory list in the user manual after unboxing. If any items appear to be missing, please fully unfold the inner packaging to confirm, and contact customer service for further assistance.

2. Q: What are the main functional components of the Xiaomi Robot Vacuum S40C?
A: For your reference, here are the main functional components of the Xiaomi Robot Vacuum S40C:
1. On the robot vacuum’s housing are the protective cover of laser sensor, infrared recharge sensor, laser distance sensor, and bumper;

2. On the underside are the side brush, cliff sensors, caster wheel, charging contacts, drive wheels, brush cover release button, brush cover, and brush;

3. Under the top cover are the dust compartment and reset button;
4. At the rear are the mop pad and water tank assembly, along with the water tank release button;

5. On the charging dock are the signaling area, power port, and charging contacts;

6. On the dust compartment are the dust compartment release button, dust compartment cover clip, dust compartment cover, filter, and filter clip;

7. On the mop pad and water tank assembly are the water tank, water tank lid, water inlet, and mop pad.

To use the Power button of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Press and hold for 3 seconds to turn on or off;
2. Press to clean/pause while turned on.
To use the Home button of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Press to pause while running;
2. Press to start docking when it is paused;
3. Press to stop docking when it returns to dock;
4. Press and hold for 3 seconds to enable or disable the child lock.
Note:
Press any button on the robot vacuum to pause during operation or returning to the charging dock.
To check the status of the indicator for the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. White: Working normally;
2. Breathing in white: In charging (medium/high battery level);
3. Blinking in white: Positioning/Returning to the charging dock;
4. Yellow: Wi-Fi disconnected;
5. Blinking in yellow: Running (low battery)/Awaiting connection/Robot vacuum error;
6. Breathing in yellow: In charging (low battery level);
7. Blinking in blue: Connecting to Wi-Fi/Updating;
8. Blue: Wi-Fi connected;
9. Off: Shut down/In sleep.
To use the Reset button of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Press and hold for 3 seconds to restore factory settings;
2. Press and hold for 10 seconds to turn it off forcefully.

3. Q: How to check the SN of the Xiaomi Robot Vacuum S40C?
A: The SN of the Xiaomi Robot Vacuum S40C can be found by checking the label on the bottom of the main unit.

4. Q: Can the Xiaomi Robot Vacuum S40C be used directly after unboxing?
A: The Xiaomi Robot Vacuum S40C can be used directly after unboxing. It is recommended to check for any missing accessories first, then open the robot vacuum and follow the user manual for operation.
For the first use, manually place the main unit on the charging dock and align it with the charging contacts. Begin using the robot vacuum after it is fully charged.

5. Q: Which mode is recommended for first-time use of the Xiaomi Robot Vacuum S40C?
A: For first-time use of the Xiaomi Robot Vacuum S40C, please refer to the following information:
If the home environment has a lot of dust or debris, it is advisable to start with Vacuuming mode only, without using the Mopping mode. After completing the initial vacuuming, install the mopping components and then switch to the vacuuming & mopping mode.

6. Q: Why does the Xiaomi Robot Vacuum S40C need to have its exterior wiped regularly?
A: The Xiaomi Robot Vacuum S40C performs vacuuming, mopping, and debris collection tasks. Regularly emptying the dustbin and cleaning the main and side brushes helps maintain its cleaning performance.
Additionally, it is equipped with various sensors to navigate and map the surrounding environment. If the device becomes dirty, promptly wipe off dust with a well-wrung damp cloth to remove foreign matter and restore the robot vacuum’s detection capability. Do not use spray cleaners or detergents for cleaning.

7. Q: How does the Xiaomi Robot Vacuum S40C enter standby mode after completing a task?
A: After completing a task, it is recommended to place the Xiaomi Robot Vacuum S40C back on the charging dock to charge and enter standby mode, ensuring the device stays powered.
If the device is not on the charging dock, press the Power button manually to turn it off and conserve battery. (The robot vacuum will automatically shut down after an extended period of standby, which is normal.)

8. Q: What to do if the side brush of the Xiaomi Robot Vacuum S40C became entangled?
A: If the side brush of the Xiaomi Robot Vacuum S40C became tangled, clean them promptly and check for any missing or damaged bristles.
Before the next cleaning session, remove items that are likely to cause entanglement, such as threads or cords, from the floor.

9. Q: Why can't the Xiaomi Robot Vacuum S40C be powered off while on the charging dock?
A: While the Xiaomi Robot Vacuum S40C is on the charging dock, it remains in standby mode.
To power it off, remove the device from the charging dock and press and hold the power button for 3 seconds.

10. Q: What types of living scenarios can the Xiaomi Robot Vacuum S40C be used in?
A: The Xiaomi Robot Vacuum S40C is designed exclusively for residential indoor floor cleaning.
It should not be used in outdoor, non-residential, commercial, or industrial environments, as doing so can result in malfunctions or loss of the device.

11. Q: How to use the Do Not Disturb mode of the Xiaomi Robot Vacuum S40C?
A: The Do Not Disturb mode of the Xiaomi Robot Vacuum S40C is enabled by default from 10:00 PM to 8:00 AM. You can disable the Do Not Disturb mode or adjust its duration through the Mi Home/Xiaomi Home APP.
While in Do Not Disturb mode, the robot vacuum will not automatically resume cleaning, it will not broadcast voice prompts, and the indicator will remain off.

12. Q: How to set the scheduled cleanup on the Xiaomi Robot Vacuum S40C?
A: The scheduled cleanup of the Xiaomi Robot Vacuum S40C can be set in the Mi Home/Xiaomi Home APP. Once a scheduled time is set, the robot vacuum will automatically start cleaning at the specified time and return to the charging dock once the task is complete.

13. Q: How to save the complete map on the Xiaomi Robot Vacuum S40C?
A: To save the complete map of the Xiaomi Robot Vacuum S40C, press the Power button to start cleaning or select the Vacuuming mode in the Mi Home/Xiaomi Home APP. The robot vacuum must begin cleaning from the charging dock, and it will save a temporary map during the cleaning process. Once cleaning is finished, it will automatically return to the charging dock and generate the complete map. (Ensure all doors in the cleaning area are open to allow for a complete mapping.)

14. Q: How to use the whole-house cleanup mode of the Xiaomi Robot Vacuum S40C?
A: Upon first use, the Xiaomi Robot Vacuum S40C will clean in 4.5m × 4.5m arc-shaped zones until the entire area is covered. Once the full map is built, it will be cleaned by room, starting with edge cleaning followed by arc-pattern cleaning. Rooms are cleaned in order, efficiently and thoroughly, with full coverage and no missed areas. After cleaning, the robot vacuum will automatically return to the charging dock.


15. Q: Can the Xiaomi Robot Vacuum S40C stay connected to the charger continuously?
A: The Xiaomi Robot Vacuum S40C supports overcharge protection. Once fully charged, it automatically switches to low-current charging.

16. Q: Does the Xiaomi Robot Vacuum S40C have motor overload protection?
A: All motors in the Xiaomi Robot Vacuum S40C are equipped with overload protection, including the brush motor, side brush motor, and drive wheel motor. If foreign objects or severe blockage cause overload, the protection mechanism will automatically activate.

17. Q: Does the Xiaomi Robot Vacuum S40C require regular replacement of consumables?
A: The Xiaomi Robot Vacuum S40C has consumables such as the brush, side brush, brush cover, filter, and mop pad, which need regular replacement to ensure optimal performance.
Recommended maintenance guidelines are as follows:

Parts	Cleaning Frequency	Replacement Frequency
Side brush	Every 2 weeks	3–6 months
Brush	Weekly	6–12 months
Filter	Weekly	3–6 months
Brush cover	/	3–6 months(or upon wear)
Mop pad	After each use	3–6 months(or upon wear)

18. Q: How to use the charging dock of the Xiaomi Robot Vacuum S40C?
A: Place the charging dock of the Xiaomi Robot Vacuum S40C on a flat surface against a wall, ensuring at least 0.5 meters of space on both sides. Connect the power adapter to the charging dock and then plug it into a power outlet. For better performance, position the charging dock within Wi-Fi coverage.
Please refer to the following information:
1. Remove the protective film from the charging dock;
2. Place the charging dock against the wall and connect it to power;
3. Connect the adapter to the charging dock.

Note:
1. Do not expose the charging dock to direct sunlight;
2. Do not place any objects within 0.5 meters on either side of the charging dock and 1.5 meters in front of it;
3. Place the robot vacuum on the charging dock before first use. It will begin charging automatically;
4. To ensure the battery's optimal performance, fully charge the battery for the first time before use;
5. If the battery is too low, the device can not power on. Place it on the charging dock to charge;
6. The robot vacuum powers on automatically when connected to the charging dock and cannot be turned off during charging.

19. Q: How to charge the Xiaomi Robot Vacuum S40C?
A: Press and hold the Power button of the Xiaomi Robot Vacuum S40C until the indicator turns on, then place the robot vacuum on the charging dock to begin charging.
Note:
If the battery is too low, the device can not power on. In this case, place the robot vacuum directly onto the charging dock to charge.

20. Q: How to clean the mop pad of the Xiaomi Robot Vacuum S40C?
A: To clean the mop pad of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Remove the mop pad by peeling off the velcro straps;
2. clean it and dry it thoroughly.

Note:
1. Make sure the mop pad is clean before use, as the mopping performance can be affected if the mop pad becomes too dirty;
2. For the best cleaning results, it is recommended to replace the mop pad every 3–6 months.

21. Q: How to add water to the water tank of the Xiaomi Robot Vacuum S40C?
A: To add water to the water tank of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Open the water tank lid, fill the water tank with tap water, and close the cover;
2. Install the mop pad and water tank assembly in the direction shown in the figure. It is installed properly when you hear a "click" sound.

Note:
1. Do not add liquids such as hot water, detergent, or disinfectant into the water tank to prevent damaging the robot vacuum;
2. The functions of the robot vacuum are inspected before leaving the factory, so there can be some water residues in it. This is normal.

22. Q: How to start the vacuuming mode on the Xiaomi Robot Vacuum S40C?
A: To start vacuuming, press the Power button on the Xiaomi Robot Vacuum S40C. Press any button during cleaning to pause the operation.
Note:
1. Before cleaning, make sure the robot vacuum is fully charged and starts from the charging dock. Do not move the charging dock during cleaning;
2. If the battery is too low to start cleaning, charge the robot vacuum first before starting the task.

23. Q: How to return the Xiaomi Robot Vacuum S40C to the charging dock for recharging?
A: After cleaning, the Xiaomi Robot Vacuum S40C will automatically return to the charging dock for recharging. While paused, you can press the recharge button to initiate charging. During charging, the power button will pulse with a breathing light.
Note:
If the robot vacuum cannot locate the charging dock, it will automatically return to the starting point. In this case, manually place the robot vacuum onto the dock to charge.

24. Q: How to maintain the brush and side brush of the Xiaomi Robot Vacuum S40C?
A: To maintain the brush and side brush of the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Pull out the side brush upwards;
2. Press the brush cover release buttons to remove the brush cover and take out the brush;
3. Clean the side brush and the brush;
4. After cleaning, reinstall the brush, brush cover, and side brush in order.


25. Q: How to empty and clean the dust compartment and filter of the Xiaomi Robot Vacuum S40C?
A: To empty the dust compartment the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Open the cover of the robot vacuum, and press the dust compartment release button to remove the dust compartment upward from the robot vacuum;
2. Open the dust compartment cover and empty the debris.

Note:
Regularly clean the filter to prevent it from becoming clogged.
To clean the dust compartment and filter, please refer to the following information:
1. Release the filter clip to open the filter and remove it;

2. Rinse the filter and gently tap its edge repeatedly to remove any dirt until it is clean;
3. Open the dust compartment cover, fill the dust compartment with clean water, and clean the dust compartment;
4. Dry the dust compartment and the filter thoroughly before reinstalling them for use.
Note:
1. Do not attempt to clean the filter with a hard object, such as a brush or your fingers;
2. Only use clean water to clean the dust compartment and the filter. Do not use detergent;
3. Dry the dust compartment and the filter thoroughly before use.


26. Q: Will yellowing of the charging contacts on the Xiaomi Robot Vacuum S40C affect its performance?
A: The charging contacts of the Xiaomi Robot Vacuum S40C are exposed to the environment and can become oxidized or yellow over time with use. This is a normal occurrence and does not affect the charging function. However, it is recommended to regularly wipe the charging contacts with a dry cloth.

27. Q: How to maintain the battery of the Xiaomi Robot Vacuum S40C?
A: The Xiaomi Robot Vacuum S40C is equipped with a high-performance lithium-ion rechargeable battery. To maintain optimal battery performance, keep the device connected to the charging dock during daily use.
Note:
If the device will not be used for an extended period, turn off the power. Charge the device at least once every three months to prevent damage from over-discharge.

28. Q: Does the Xiaomi Robot Vacuum S40C support child lock function?
A: The Xiaomi Robot Vacuum S40C supports child lock function. You can press and hold the Home button for 3 seconds to enable or disable the child lock.

29. Q: Does the Xiaomi Robot Vacuum S40C support ultraviolet sterilization?
A: The Xiaomi Robot Vacuum S40C does not support ultraviolet sterilization.

30. Q: Does the Xiaomi Robot Vacuum S40C support electrolyzed water sterilization?
A: The Xiaomi Robot Vacuum S40C does not support electrolyzed water sterilization.

31. Q: How to reset the Xiaomi Robot Vacuum S40C?
A: You can press and hold the reset button for 3 seconds to reset the Xiaomi Robot Vacuum S40C. After hearing the voice prompt, the main unit will automatically restart. Scheduled cleanup, Wi-Fi, and other related settings will be restored to factory defaults.

32. Q: Does the Xiaomi Robot Vacuum S40C provide alerts for low water levels and a full dust compartment?
A: The Xiaomi Robot Vacuum S40C does not provide alerts for low water levels and a full dust compartment.

33. Q: Can the stickers be attached on the Xiaomi Robot Vacuum S40C?
A: It is not recommended to apply stickers to the Xiaomi Robot Vacuum S40C. Stickers can obstruct the laser radar on top of the device or the infrared sensor on the front bumper, which can affect the robot vacuum's operation.

34. Q: How does the Xiaomi Robot Vacuum S40C create a map?
A: Press the Power button of the Xiaomi Robot Vacuum S40C to start cleaning, or select the Vacuuming mode in the Mi Home/Xiaomi Home APP. The robot vacuum must start from the charging dock. A temporary map will be saved during the cleaning process, and once cleaning is complete, the robot vacuum will automatically return to the charging dock and generate a complete map.
Note:
Please ensure that all doors in the cleaning area are open during vacuuming to allow for complete map generation.

35. Q: Does the Xiaomi Robot Vacuum S40C support direct rinsing with water?
A: The Xiaomi Robot Vacuum S40C does not support direct rinsing with water. Rinsing the robot vacuum directly can allow water to enter the internal components and cause damage. If the device becomes dirty, it is recommended to remove accessories such as the brush cover, brush, side brush, dust compartment, and mop pad for individual cleaning. Make sure all parts are completely dry before reinstalling and using them.

36. Q: How to use the Xiaomi Robot Vacuum S40C to clean stubborn stains?
A: It is recommended to pre-soak stubborn stains with water before using the Xiaomi Robot Vacuum S40C for cleaning.

37. Q: Does the Xiaomi Robot Vacuum S40C support small object recognition?
A: The Xiaomi Robot Vacuum S40C does not support small object recognition.

38. Q: What are the precautions when using the Xiaomi Robot Vacuum S40C for the first time?
A: The precautions when using the Xiaomi Robot Vacuum S40C for the first time are as follows:
1. The Xiaomi Robot Vacuum S40C comes with a 2600mAh battery and is pre-charged to approximately 30% at the factory. It is recommended to fully charge the robot vacuum before the first use;
2. Fill the water tank with water;
3. Connect the robot vacuum to the Mi Home/Xiaomi Home APP and Wi-Fi network, then place the robot vacuum on the charging dock to begin cleaning.

39. Q: Will the Xiaomi Robot Vacuum S40C avoid table and chair legs while cleaning?
A: When the Xiaomi Robot Vacuum S40C encounters table or chair legs, it will clean along the edges of the obstacles.

40. Q: How long does the Xiaomi Robot Vacuum S40C to clean a single room?
A: To ensure thorough cleaning performance, the Xiaomi Robot Vacuum S40C moves at a speed of 0.3 meters per second. The actual cleaning time can vary depending on the complexity of the home environment.

41. Q: Why can’t the Xiaomi Robot Vacuum S40C always avoid obstacles like scale buildup or building blocks?
A: The Xiaomi Robot Vacuum S40C uses a mechanical bumper and LDS laser navigation to detect and avoid obstacles. If an object is smaller than 3cm, such as a scale or power outlet, it is recommended to remove it before cleaning to avoid collision.

42. Q: Is it normal for the water tank to have water in it when opening the Xiaomi Robot Vacuum S40C for the first time?
A: It is normal for the water tank to have water in it when opening the Xiaomi Robot Vacuum S40C for the first time. The robot vacuum is inspected before leaving the factory, including a water tank inspection using clean water. After the inspection, the water is drained, but some residual moisture can remain inside the tank.

43. Q: Does the Xiaomi Robot Vacuum S40C support carpet recognition?
A: The Xiaomi Robot Vacuum S40C does not support carpet recognition.

44. Q: Can the Xiaomi Robot Vacuum S40C automatically clean the mop pad?
A: The Xiaomi Robot Vacuum S40C does not support automatic mop pad cleaning. You need to manually remove and clean the mop pad. It is recommended to clean the mop after each cleaning task.

45. Q: Does the Xiaomi Robot Vacuum S40C support adding water during cleaning process?
A: If you need to add water to the Xiaomi Robot Vacuum S40C during the cleaning process, press any button to pause the robot vacuum, remove the water tank, refill it, then reinstall it and press the Home button to resume cleaning. Mop pad maintenance needs to be done manually.

46. Q: Why does the Xiaomi Robot Vacuum S40C return to charge midway and then continue cleaning?
A: During cleaning, if the battery level is low, the Xiaomi Robot Vacuum S40C will return to the charging dock to recharge. Once fully charged, it will automatically resume and complete the remaining cleaning task.

APP Related
1. Q: How to connect the Xiaomi Robot Vacuum S40C to the Mi Home/Xiaomi Home APP?
A: The Xiaomi Robot Vacuum S40C works with the Mi Home/Xiaomi Home APP and you can control your device with it.
To connect the Xiaomi Robot Vacuum S40C, please refer to the following information:
1. Download and install the Mi Home/Xiaomi Home APP. If you have already installed the APP, it will take you directly to the device connection interface. Alternatively, you can search for "Mi Home/Xiaomi Home" in the APP store/Google Play store to download and install it;
2. Open the home interface of the Mi Home/Xiaomi Home APP, tap the [+] icon at the top right corner of the screen, and follow the on-screen instructions to add the Xiaomi Robot Vacuum S40C.
Note:
1. Due to updates to the Mi Home/Xiaomi Home APP, actual operations can differ slightly from the descriptions above. Please refer to the current instructions within the APP for accurate guidance;
2. Only 2.4GHz Wi-Fi networks are supported;
3. When the robot vacuum connects with the Mi Home/Xiaomi Home APP successfully, it connects with the network successfully. You can have a reset of Wi-Fi to disconnect it from the network.

2. Q: How to reset the Wi-Fi on the Xiaomi Robot Vacuum S40C?
A: If the Xiaomi Robot Vacuum S40C fails to connect to your router due to configuration changes or forgotten passwords, open the top cover to check the indicator. Then, press and hold both the Power button and the Home button for 7 seconds until you hear a voice prompt. Wait for the indicator to start flashing again, indicating that the reset was successful.

3. Q: How to update the firmware of the Xiaomi Robot Vacuum S40C?
A: You can update the firmware of the Xiaomi Robot Vacuum S40C via the Mi Home/Xiaomi Home APP. Before updating, make sure the robot vacuum is placed on the charging dock and has at least 15% battery.

4. Q: How to quickly create a map with the Xiaomi Robot Vacuum S40C?
A: Press the Power button of the Xiaomi Robot Vacuum S40C to start cleaning, or tap the Vacuuming mode in the Mi Home/Xiaomi Home APP. The robot vacuum will start from the charging dock and create a temporary map during cleaning. Once cleaning is complete, it will return to the charging dock and generate a complete map. (Ensure all doors in the cleaning area are open to allow for a complete mapping.)

5. Q: What is the Do Not Disturb feature on the Xiaomi Robot Vacuum S40C?
A: In Do Not Disturb mode, the Xiaomi Robot Vacuum S40C will not perform continuous or scheduled cleanup, nor will it play voice prompts. This mode is enabled by default from 10:00 PM to 8:00 AM. You can disable it in the Mi Home/Xiaomi Home APP.

6. Q: What is the map feature on the Xiaomi Robot Vacuum S40C?
A: For the initial cleaning, the Xiaomi Robot Vacuum S40C must start from the charging dock. After completing the task, it will return to the charging dock automatically. The map will only be saved after a full cleaning cycle. If you manually stop cleaning or return the robot vacuum to the dock before completion, the map will not be saved. Once the map is created, you can divide, merge areas, or rename rooms in the Mi Home/Xiaomi Home APP.

7. Q: What is the scheduled cleanup feature on the Xiaomi Robot Vacuum S40C?
A: You can set a scheduled cleanup time in the Mi Home/Xiaomi Home APP. The Xiaomi Robot Vacuum S40C will automatically begin cleaning at the specified time and return to the dock when finished.

8. Q: What is the virtual walls feature on the Xiaomi Robot Vacuum S40C?
A: You can set up virtual walls in the Mi Home/Xiaomi Home APP to prevent the Xiaomi Robot Vacuum S40C from entering areas you don’t want it to clean.

9. Q: How to edit cleaning zones on the Xiaomi Robot Vacuum S40C?
A: To merge the rooms, please refer to the following instructions:
Open the [Mi Home/Xiaomi Home] APP and choose the [Xiaomi Robot Vacuum S40C] card >> tap the three dots at the upper right corner >> choose [Area editor] to merge.
To divide the rooms, please refer to the following instructions:
Open the [Mi Home/Xiaomi Home] APP and choose the [Xiaomi Robot Vacuum S40C] card >> tap the three dots at the upper right corner >> choose [Area editor] to divide.

10. Q: How to reset the map on the Xiaomi Robot Vacuum S40C?
A: To reset the map on the Xiaomi Robot Vacuum S40C, please refer to the following information:
Open the [Mi Home/Xiaomi Home] APP >> choose the [Xiaomi Robot Vacuum S40C] card >> tap the three dots icon at the upper right corner >> select [Map list] and tap the map you want to delete >> tap the delete icon at the upper right corner to remove the map. After confirming, the map will be deleted, and you will need to create a new one.

11. Q: How to rename the map on the Xiaomi Robot Vacuum S40C?
A: To rename the map on the Xiaomi Robot Vacuum S40C, please refer to the following information:
Open the [Mi Home/Xiaomi Home] APP >> choose the [Xiaomi Robot Vacuum S40C] card >> tap the three dots icon at the upper right corner >> select [Map list] >> tap the map you want to rename to enter a new name.

FAQs
1. Q: What to do if the Xiaomi Robot Vacuum S40C cannot connect to the network?
A: If the Xiaomi Robot Vacuum S40C fails to connect to the network, please refer to the following tips:
1. Check whether the Wi-Fi password entered is correct. Wi-Fi names should not contain Chinese characters, and passwords should avoid special characters such as @, $, or %. Try changing the name and password to alphanumeric characters and reconnect;
2. Make sure your router is properly connected to the internet. Try opening a web page using the same Wi-Fi on your phone or computer to confirm;
3. Ensure the robot vacuum is not too far from the router (over 5 meters or with obstacles). Try placing the device within 1-2 meters of the router and reconnect;
4. Try connecting to a mobile hotspot;
5. Check whether your router is overloaded with connected smart devices, which could slow the network or cause disconnection. Restart the router and try again;
6. The robot vacuum currently does not support enterprise EAP802.1x networks, 5GHz networks, or public Wi-Fi networks requiring web authentication. Switch to a supported network and try again;
7. Ensure the Mi Home/Xiaomi Home APP has permission to access the network and location on your phone. Enable these permissions and try again;
8. Connectivity issues could also be phone model-specific. Try using a different phone to connect;
9. Re-enter pairing mode and try pairing again.

2. Q: Why can't the Xiaomi Robot Vacuum S40C charge properly?
A: Please check if there is dust on the charging port or contacts of the Xiaomi Robot Vacuum S40C. Wipe them clean and try again.

3. Q: Why is the Xiaomi Robot Vacuum S40C not dispensing water?
A: If the Xiaomi Robot Vacuum S40C is not dispensing water, please check the following:
1. Make sure water has been filled at least to the minimum level line;
2. Confirm that the water tank is properly installed;
3. Restart the robot vacuum and check again.
If the issue persists, please contact the local after-sales customer service.

4. Q: What to do before starting a cleaning task with the Xiaomi Robot Vacuum S40C?
A: Make sure the Xiaomi Robot Vacuum S40C is fully charged. Before cleaning, tidy up your home and remove fragile or loose items from the floor.

5. Q: Will the Xiaomi Robot Vacuum S40C have lower efficiency in complex environments?
A: To ensure full coverage, the Xiaomi Robot Vacuum S40C will clean along all corners. In more complex environments, increased movement and adjustments can reduce cleaning efficiency slightly.

6. Q: Why is the Xiaomi Robot Vacuum S40C noisy while cleaning?
A: If the Xiaomi Robot Vacuum S40C is producing more noise than usual, consider the following:
1. Check whether the brush is tangled with debris, which can cause unusual sounds. Clean it regularly to prevent damage;
2. The robot vacuum uses a high-suction fan for stronger dust collection, which can generate more noise. To reduce noise, you can lower the suction level.

7. Q: Why does the Xiaomi Robot Vacuum S40C make unusual sounds while cleaning?
A: On smooth surfaces such as tile or wooden floors, the scraper of the Xiaomi Robot Vacuum S40C at the bottom can make light friction sounds. When moving across floor or tile gaps, the sound of brushing those seams is normal and does not affect performance.

8. Q: What to do if the Xiaomi Robot Vacuum S40C gets stuck while cleaning?
A: The Xiaomi Robot Vacuum S40C can get stuck on items like slippers or plastic bags. Once the obstruction is cleared, place the robot vacuum back in a clean area to resume cleaning. Please tidy up clutter before cleaning to avoid this issue.

9. Q: Why does the Xiaomi Robot Vacuum S40C bump into walls when cleaning along edges?
A: When cleaning along walls, the Xiaomi Robot Vacuum S40C maintains a certain distance. Occasional bumping into walls is normal.

10. Q: What to do if the Xiaomi Robot Vacuum S40C won’t turn on?
A: If the Xiaomi Robot Vacuum S40C won’t turn on, it means that the battery can be too low. Place the robot vacuum on the charging dock to charge it. If the surrounding temperature is too low (below 0°C) or too high (above 40°C), use the robot vacuum in environments between 0°C and 40°C.

11. Q: What to do if the Xiaomi Robot Vacuum S40C cannot charge?
A: If the Xiaomi Robot Vacuum S40C cannot charge, please make sure both ends of the charging dock power cable are properly plugged in. If there is poor contact, clean the spring pins on the charging dock and the charging contacts on the robot vacuum.

12. Q: Why is the Xiaomi Robot Vacuum S40C unable to charge?
A: The Xiaomi Robot Vacuum S40C can be unable to charge due to the following reasons:
1. The charging dock can be placed on a carpet. Please place the charging dock on a hard floor surface;
2. Ensure that there is no dust or obstruction on the spring contacts of the charging dock;
3. The power cable can not be securely plugged in on both ends;
4. Make sure there is enough open space around the charging dock.

13. Q: What to do if the Xiaomi Robot Vacuum S40C cannot remove stubborn stains while mopping?
A: If the Xiaomi Robot Vacuum S40C cannot remove stubborn stains while mopping, manual cleaning can be required for certain tough stains.

14. Q: What to do if the Xiaomi Robot Vacuum S40C gets dirtier while mopping?
A: If the Xiaomi Robot Vacuum S40C gets dirtier while mopping, please regularly clean the brush and the mop pad to maintain cleaning performance.

15. Q: Why does the Xiaomi Robot Vacuum S40C move backward?
A: If the Xiaomi Robot Vacuum S40C moves backward, please check the following possible causes:
1. Check whether there is any debris tangled in the drive wheels;
2. Ensure the LDS is functioning properly;
3. Check the rotating part of the LDS for any obstructions or hair that can slow it down or cause it to stop. Remove if necessary;
4. Inspect the bumper and the surface of the robot vacuum for uneven stickers or large objects;
5. Gently press the bumper to check if it rebounds properly;
6. Try restarting the device and test it again.

16. Q: What to do if the Xiaomi Robot Vacuum S40C has abnormal collisions?
A: If the Xiaomi Robot Vacuum S40C has abnormal collisions, please try the following steps:
1. Gently press the bumper to check if it rebounds normally;
2. Restart the device and try again.

17. Q: What to do if the side brush of the Xiaomi Robot Vacuum S40C reports an error?
A: If the side brush of the Xiaomi Robot Vacuum S40C reports an error, please refer to the following:
1. Remove the side brush and check whether any debris or hair is tangled in the brush or its parts;
2. Restart the device and try again.

18. Q: Does the Xiaomi Robot Vacuum S40C support multiple device connections?
A: The Xiaomi Robot Vacuum S40C does not support simultaneous connections with multiple accounts. However, the device can be shared with others. You can share the device with other Xiaomi Accounts in the Mi Home/Xiaomi Home APP. The shared Xiaomi Accounts can do such basic operations on the robot vacuum as Start, Pause, Stop cleanup, or adjusting the suction and water level.

19. Q: Why is the Xiaomi Robot Vacuum S40C offline?
A: If the Xiaomi Robot Vacuum S40C appears offline, please check the following:
1. The Wi-Fi signal can be weak. Ensure the robot vacuum is placed in an area with a strong Wi-Fi signal;
2. There can be a Wi-Fi connection issue. Please reset the Wi-Fi and reconnect using the latest version of the Mi Home/Xiaomi Home APP;
3. Make sure the robot vacuum is powered on. When turned off, it will automatically switch to offline mode.

20. Q: What to do if the drive wheel of the Xiaomi Robot Vacuum S40C is not working properly?
A: If the drive wheel of the Xiaomi Robot Vacuum S40C is not working properly, try the following:
1. Check whether there is any debris or tangled hair in or around the drive wheel and its components;
2. If the drive wheel is too dirty, it can affect traction. Use a brush to clean the drive wheel thoroughly;
3. Restart the device and test it again.

21. Q: What to do if hair gets tangled in the brush of the Xiaomi Robot Vacuum S40C?
A: If hair gets tangled in the brush of the Xiaomi Robot Vacuum S40C, please follow these steps:
1. If hair is wrapped around the brush end cover, pull out the end cover to remove the tangled hair;
2. After cleaning, reattach the brush end cover to the brush and reinstall the brush into the vacuum robot. Close the brush cover before using the robot vacuum again.

22. Q: What to do if there is hair on the floor after vacuuming or mopping with the Xiaomi Robot Vacuum S40C?
A: If there is still hair on the floor after vacuuming or mopping with the Xiaomi Robot Vacuum S40C, it is recommended to use the Vacuuming before mopping mode for better cleaning results.

23. Q: Why can’t the Xiaomi Robot Vacuum S40C reach the designated area?
A: If the Xiaomi Robot Vacuum S40C is assigned to clean a designated area and there are no obstacles in its path, but it still cannot reach the area, check the map list in the Mi Home/Xiaomi Home APP. If there are similar or duplicate maps, delete them to prevent the robot vacuum from switching to the wrong map due to re-localization.

24. Q: Why does the Xiaomi Robot Vacuum S40C fail to release water even though the water tank is filled?
A: If the Xiaomi Robot Vacuum S40C fails to release water despite the water tank being filled, check whether it is placed on a steep slope or experiencing wheel slippage. Move the robot vacuum to a flat surface, or adjust the terrain to ensure level ground before trying again.

25. Q: What to do if the Xiaomi Robot Vacuum S40C cannot return to the charging dock properly?
A: If the Xiaomi Robot Vacuum S40C cannot return to the charging dock properly, check whether the power cable of the charging dock is securely plugged in. Also, inspect the charging springs on the dock. If they are dirty, wipe them clean before retrying.

26. Q: Why can't the Xiaomi Robot Vacuum S40C climb slopes that it used to climb?
A: Over time, the drive wheels of the Xiaomi Robot Vacuum S40C can accumulate dust and debris, which reduces traction and affects its ability to cross obstacles or climb slopes. It is recommended to clean the surface of the drive wheels with a brush once a week to maintain performance.