Xiaomi Vacuum Mop robots (including Pro, 2 Pro, S10 and others) combine dry and wet cleaning, but many users face problems when first filling the tank with water. Incorrect filling of the tank can lead to leaks, errors on the display or even break the device. In this article, we will discuss the step-by-step algorithm for pouring water, nuances for different models and common errors that should be avoided.
Xiaomi's systems are designed to automatically control water flow through an electronic pump, so if you pour fluid or use an inappropriate container, the robot may refuse to work or start spitting water on the floor, and we tested the process on 5 models of the series and identified key points that the manufacturer misses in the official instructions.
What water can be poured into Xiaomi Vacuum Mop
Not all water is suitable for a robot vacuum cleaner, and the use of the wrong fluid is the main cause of pump failures and tube clogging.
- 💧 Only pure drinking water (no chlorine, impurities, flavors) is suitable bottled or filtered.
- ❌ Prohibited: tap water (due to salts), distilled (may damage seals), soap solutions.
- 🌡️ Temperature: room temperature (15–25)°Hot water deforms plastic, cold water reduces cleaning efficiency.
- 🧴 Cleaning products: only specialized for robot vacuum cleaners (e.g. Xiaomi Detergent) Common floor cleaners leave foam that breaks the pump.
If you use detergent, observe the ratio: 1 cap (5 ml) per 200 ml of water. Excess concentration leads to plaque on the sensors.
Step-by-step: how to pour water into the tank
The refueling process is the same for most Xiaomi Vacuum Mop models, but there are nuances for dual-tank devices (e.g., Xiaomi Mop 2 Pro).
- Turn off the robot and remove the water tank, which is located behind the lid on most models with a droplet pictogram (💧).
- Remove the tank cover. On some models (e.g. S10), the lid is locked with a latch, press it from the side.
- Pour water to the mark MAX. Volume varies: 📏 Xiaomi Vacuum Mop Basic: 200 millimeter 📏 Xiaomi Vacuum Mop Pro/2 Pro: 250 millimeter 📏 Xiaomi Vacuum Mop S10: 300 ml (with the ability to adjust the intensity of the water supply)
Put the tank back in.
Turn on the robot.
☑️ Checking before pouring water
Critical error: If the robot produces an E5 or E6 error after refueling, it means that the pump leaks or malfunctions. Remove the tank immediately and dry the contacts!
Differences between models: Basic, Pro, S10
The design of the tanks and the water supply system differ from model to model, and below is a comparative table of key parameters:
| Model | Volume of tank (ml) | Type of pump | Intensity adjustment | Features |
|---|---|---|---|---|
| Xiaomi Vacuum Mop Basic | 200 | Mechanical | No. | Simple system, no electronic flow control |
| Xiaomi Vacuum Mop Pro | 250 | Electronic | 3 levels | Floor humidity sensor, automatic adjustment |
| Xiaomi Vacuum Mop 2 Pro | 250 | Electronic | 4 levels | Double tank (water + detergent) |
| Xiaomi Vacuum Mop S10 | 300 | Electronic + Vibrational | 5 levels | Self-cleaning system of rags, water pollution sensor |
For dual-tank models (like the 2 Pro), pour water and detergent into different compartments, and you can't mix them manually, because the robot will dosage the components automatically during cleaning.
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If your model supports the regulation of the water supply intensity, choose the minimum level (1-2) for laminate or parquet, and the maximum level (4-5) for tile.
What to do if the robot does not spray water
If after refueling the robot does not moisturize the floor, check the following points:
- 🔌 Powering the pump: Make sure the robot is on and charged (minimum 20% battery).
- 🚫 Lock: Some models have a physical water supply switch (for example, on Xiaomi Vacuum Mop Basic – a lever on the side of the tank).
- 🧹 Tubular clog: Clean the nozzles on the bottom of the robot with a toothpick (do not use metal objects!).
- 🔄 Resetting: in the Mi Home app, go to Device Settings → Reset → Resetting cleaning settings.
If the problem persists, calibrate the pump:
- Remove the tank and drain the water completely.
- Pour the water to the MAX mark and set the tank back.
- Turn on the robot and start cleaning manually (button on the case).
- Wait for the robot to start moving, and interrupt the cleaning in 10 seconds. Repeat 2-3 times.
How to check the pump without cleaning?
Mistakes in pouring water and how to avoid them
Even experienced users make mistakes that shorten the life of the robot, and here are the most common ones:
⚠️ Warning: If the robot makes a loud buzzing sound after pouring water, but the water does not come in, this is a sign of a tube tube air plug.
- 🌊 Water overflow: Leads to leaks and errors E5. Always be guided by the mark MAX.
- 🧼 Using uncertified detergents: foam clogs sensors.Use only original Xiaomi remedies.
- ❄️ Storing a robot with water in a tank: in winter, water can freeze and damage the plastic.
- 🔋 Water pouring at low battery charge: if the charge is below 15%, the robot may not turn on the pump.
For models with a rag self-cleaning system (for example, S10), after each 3-4 cleaning, wash the tank under running water to remove the accumulated plaque.
How often should the water in the tank be changed?
The frequency of water replacement depends on the intensity of use and the type of floors:
- 🏡 Daily cleaning: change the water before each cleaning, otherwise bacteria will multiply in the tank.
- 📅 Cleaning 2-3 times a week: it is enough to drain water after each cleaning and wash the tank 1 time a week.
- 🧽 After cleaning highly contaminated surfaces (for example, after repair): wash the tank and tubes with vinegar solution (1:1 with water), then rinse with clean water several times.
For models with a water pollution sensor (e.g., S10), the robot itself alerts the need for replacement through a notification in the Mi Home app. Ignoring the signal leads to poor cleaning quality and sensor breakdown.
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Never leave water in the tank for more than 24 hours – this shortens the life of seals and leads to an unpleasant odor.