Discuss the robot vacuum cleaner Xiaomi: a detailed guide with photos and tips

Xiaomi's robot vacuum cleaners are some of the most popular cleaning assistants, but over time, even they require maintenance: Dust, hair and debris accumulate in hard-to-reach places, brushes wear out, and sensors can become contaminated, causing malfunctions. Disassembling the device yourself is a task that can be done if you know the sequence of actions and have the right tools on hand.

In this article, we will discuss how to properly dismantle the body, get to key nodes (engine, battery, sensors) and avoid typical errors. The instructions are suitable for most models Xiaomi Mi Robot, Viomi and Dreame (including Mi Robot Vacuum-Mop 2 Pro, Dreame). D9, Viomi V3 If your model is different, check the nuances in the technical documentation.

Before you start, remember that a wrong disassembly can lead to the loss of warranty (if it is still valid) or damage to the control board. If you are not sure of your abilities, contact the service center. For the rest, go ahead!

1. Disassembly preparation: safety tools and measures

Before you disassemble the robot vacuum cleaner, prepare the workspace and tools.

• ✅ Plastic mediators or shoulder blades (to gently open the latch of the case). Metal screwdrivers can leave scratches!
• ✅ Cross screwdriver (usually) PH0 or PH1 — model).
• ✅ Tweezers (to extract small parts, such as spring contacts).
• ✅ Multimeter (optional, to check the voltage of the battery).
• ✅ Microfiber wipes and alcohol (to clean sensors and contacts).
• ✅ Container for screws (so as not to lose small parts).

We also recommend taking pictures of each stage of disassembly, which will help to properly assemble the device back. Pay special attention to the location of the wires and connectors!

⚠️ Warning: Do not disassemble the vacuum cleaner immediately after cleaning! Let it cool for 15-20 minutes - heated parts (such as an engine) can deform when mechanically exposed.

If your robot vacuum cleaner is warranty-free, check if the screws are sealed with warranty seals, and if you damage them, you'll be better off contacting an authorized Xiaomi service.

Removal of the upper cover: step-by-step instructions

On most Xiaomi models, the top cover is mounted on latches and 2-4 screws (depending on the modification).

1. Turn the vacuum cleaner up with the buttons and remove the vacuum collector.
2. Unscrew the screws under the dust collector (usually 2-3). They can be hidden under rubber plugs - gently put them under a knife or mediator.
3. Insert a plastic blade into the gap between the top and bottom of the case (start at the corner next to the power button) and gently lead along the perimeter, snapping the mounts. Don't put too much effort - the plastic is brittle!
4. When all the latches open, lift the lid. Be careful, it may be attached to wires (for example, from the power button or indicators).

On some models (e.g. Dreame) D9) The lid is further secured by hidden latches under the side brushes, in which case, first remove the brushes by pulling them up.

⚠️ Note: On models with a laser rangefinder (such as the Mi Robot Vacuum-Mop 2 Pro), the top cover is connected to the control board with a thin plume. Don't pull it sharply - first disconnect the connector!

If the lid doesn't lend itself, make sure all the screws are twisted. Sometimes the manufacturer hides them under stickers or in the recesses of the case. Use a flashlight to inspect.

3. Battery recovery: safety regulations

The battery is one of the most vulnerable parts of the robot vacuum cleaner, and over time, it loses its capacity, it swells up, it stops holding the charge, and it takes it out.

1. Disconnect the power connector from the motherboard (usually black or red) and gently pull the plastic tongue.
2. Unscrew the screws that fix the battery (there can be 2-4).
3. Put a blade on the battery and remove it. Be careful, lithium batteries are sensitive to mechanical damage.

Before installing a new battery, check its voltage with a multimeter. Normal rates for most Xiaomi models:

Critical information: If the battery is swelling, don't try to puncture it or bend it! This can cause fire. Dispose of the battery at special reception points.

When replacing the battery, choose a model with the same parameters (voltage, capacity, type of connector), using a battery with a different voltage can incapacitate the control board.

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Before installing a new battery, clean the contacts on the board and connector with alcohol - this will improve the connection and prevent oxidation.

Access to the engine and suction system

If the robot vacuum cleaner doesn't suck up garbage or makes uncharacteristic noises, the problem may lie in the fan engine or clogged ducts to get to them:

1. Remove the top cover (as described above).
2. Disconnect the connectors from the control board leading to the engine (usually marked in red or orange).
3. Unscrew the screws that attach the engine to the body. There can be 3-5, depending on the model.
4. Carefully remove the engine along with the duct, inspect it for clogs or damage to the blades.

Frequent engine problems:

• 🌀 Clogging of blades - hair, thread and wool are wound onto the shaft, blocking rotation.
• 🔊 Wear bearings - manifests as a creak or hum when working.
• 💨 Breakdowns in the duct – cracks or disconnected tubes reduce suction power.

Use tweezers or toothpicks to clean the blades, if the bearings are worn out, the engine must be replaced (they cannot be repaired), the ducts can be washed with warm water and soap, but must be thoroughly dried before assembly (at least 24 hours).

⚠️ Warning: Do not use compressed air to clean the engine - this can damage the blades or move the rotor magnets.

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If the engine is still unstable after cleaning, check the power circuit with a multimeter, possibly the control board or the wires.

5 Cleaning and replacement of brushes, wheels and sensors

Brushes, side wheels and sensors are consumables that require regular maintenance, and replacing or cleaning them doesn't require complete disassembly of the body, but it still requires care.

Sidebrush

To remove the side brush:

1. Press the lock (usually located on the side or bottom of the brush).
2. Pull the brush over yourself - it should come out of the groove.
3. Clean the shaft of wound hair and debris.

Main brush.

To remove the main brush:

1. Then, pull the slacks (or pull them) on the side of the slack.
2. Remove the brush and clean it of debris. Check the bearings, if they're lufty, you'd better replace the brush.

Sensors.

The bumper and the height sensors are located around the perimeter of the hull, and can be cleaned:

• 🧹 Dry wipe (to remove dust).
• 💧 Alcohol (to remove fatty stains or traces of glue).

If the sensor is not responsive to obstacles, check its contacts on the board. Sometimes the problem is solved by simply restarting the vacuum cleaner (hold the power button for 10 seconds).

Disassembly of the control board: for experienced users

The control fee is the brain of a robot vacuum cleaner, which is rarely disassembled (for example, when replacing chips or repairing after flooding), but if you decide to do this, follow the instructions:

1. Disconnect all connectors from the board (take a picture of their location!).
2. Unscrew the screws that attach the board to the case, usually 4-6.
3. Carefully remove the board. Be careful with capacitors - they can be fragile.

Typical fee problems:

• 🔥 Burned elements (resistors, transistors) – visible in blackened areas.
• 💧 Contact oxidation - green plaque on the tracks.
• 🔌 Detached connectors - checked by a multimeter.

For the repair of the fee will need:

• 🔧 A soldering iron with a thin sting (power not more than 30 W).
• 🧲 solder and flux (better to use acid-free).
• 🔍 Loop for inspection of small details.

⚠️ Warning: If the board has been filled with water, do not turn the vacuum cleaner on until completely dry (minimum 48 hours in rice or silica gel!

If you don’t have ration experience, it’s best to entrust the repair of the board to professionals.The cost of repairing the service is usually lower than the price of a new fee (which can go up to 70% of the cost of a vacuum cleaner).

7.Applying robot vacuum cleaner after disassembly

Assembly is no less important than dismantling.

1. Make sure all the connectors are connected correctly. A skewed connector can damage the board.
2. Twisting the screws cross-cross to avoid skewing the body.
3. Before the final assembly, turn on the vacuum cleaner and check the operation of all systems (engine, brushes, sensors).

Typical errors in assembly:

• ❌ Forgotten screws - lead to backlash of the body and breakage of the latches.
• ❌ Confused connectors - can bring down the board.
• ❌ Incorrectly installed dust collector - leads to loss of suction power.

After assembly, perform the calibration of the sensors:

1. Put the vacuum cleaner on a flat surface.
2. Press the Home and Spot buttons for 3 seconds (for most models).
3. Wait for the beep - calibration is complete.

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If the vacuum cleaner does not turn on after assembly, check the fuse on the board (usually located next to the power connector), it can be replaced by yourself, choosing the same one at par.

8. Frequent breakdowns and their causes

If you know the typical malfunctions, you can prevent them or quickly fix them, and these are the most common problems.

If your vacuum cleaner gives an error in the application (for example, Error 10 or Sensor Fault), you can decrypt it in the official documentation of Xiaomi or on thematic forums (for example, 4PDA).

Most breakdowns are due to late maintenance, and regular cleaning of brushes, filters and sensors extends the life of the device by 30 to 50 percent.

FAQ: Answers to popular questions