Xiaomi air conditioners are smart devices with advanced features, but even they require periodic maintenance. Disassembly of the split system may be necessary to deep clean the filters, replace freon, repair the control board or fix fan malfunctions. However, improper dismantling can lead to refrigerant leakage, damage to the tubes or failure of electronics.
In this article, we will discuss in detail how to disassemble the internal and external units of the Xiaomi Mi Air Conditioner (including the Mijia Smartmi and Xiaomi Pro models), you will learn what tools you need, how to avoid typical errors and what to do if the system stops cooling after disassembly. Importantly, the procedure requires working with freon - if you do not have experience, it is better to entrust it to the professionals.
Preparation for disassembly: tools and security measures
Before you start, make sure you have everything you need. Disassembling Xiaomi air conditioner will require:
- 🔧 A set of screwdrivers (cross and flat, including) T15-T20 for some).
- 🔨 Hexagonal keys (dimensions 3 mm and 4 mm for attaching the external unit).
- 🧤 Gloves and glasses - Freon under pressure can frostbite the skin, and dust from filters irritates the mucous membrane.
- 📸 Smartphone for photography – fix the location of wires and tubes before disconnecting.
- 🔌 Multimeter – to check the voltage on the board (if you plan to repair electronics).
Pay special attention to safety:
⚠️ Warning: If the air conditioner was turned on less than 10 minutes ago, the refrigerant in the tubes is under high pressure.
| Tool. | Appointment | Where to buy |
|---|---|---|
| Manometric manifold | For scorching/injecting freon | Specialized stores of climate equipment |
| Vacuum pump | Removal of moisture from the system before refueling | Renting or buying in service centers |
| shrink tube | Wire insulation after repair | Any electronics store |
If you do not plan to work with freon, limit yourself to disassembling the inner unit - it can be removed from the wall without the risk of leakage of the refrigerant. The outer unit is disassembled only if you need to repair the compressor or fan.
Disassembly of the internal unit Xiaomi: step-by-step instructions
To start with, the most common scenario is cleaning or repairing the internal module, with the Xiaomi Mi Air Conditioner and Mijia Smart Air Conditioner having similar processes, but different front panel mounts.
Step 1. Power outage
Pull the plug out of the plug and make sure the monitors aren't on the remote, and if the air conditioner is plugged in through the machine in the shield, turn it off.
Step 2: Removal of the front panel
Carefully pull the bottom of the panel on you - it is held on the latches. Xiaomi Pro models can have additional screws under a decorative stub (look for them on the sides).
Power's out.
The location of the wires is photographed
Prepared space for storage of parts
Checked latches for the presence of hidden screws-->
Step 3: Removing filters and fan
After removing the panel, you will see:
- 🌀 Upper filter (network or net) HEPA) — move up.
- 🌀 Lower filter (charcoal or antibacterial) - can be attached to clamps.
- 🌀 Fan (impeller) – in Xiaomi models, it is usually fixed with a central nut (T20).
For deep cleaning of the fan, use a soft brush and vacuum cleaner. Do not wash it under running water - this can disrupt the balance.
What to do if the fan is not removed?
Dismantling control boards and sensors
The control board is the most vulnerable element of Xiaomi's air conditioner, and it's responsible for communicating with the remote, controlling the compressor and protecting against overheating.
Step 1. Disconnect the connectors.
Take a picture of all the wires. In Mi Air Conditioner models, the board is usually on the right under the lid. Carefully flick the connectors by pulling plastic tongues (not wires!).
Step 2: Withdrawal of fees
Unscrew 4 screws (T15) And you take out the board:
- 🔥 Burned elements (resistors, capacitors).
- 💧 Traces of oxidation – often caused by condensation.
- 🕳️ Cracks on the tracks (especially near the power connectors).
If the fee is faulty, it can be replaced with a similar one (see model number, for example, MB-AC01 Xiaomi Mi Air Conditioner).
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Before installing a new board, check the voltage on the multimeter power contacts.Normal for Xiaomi — 12V or 24V model-wise.
Disassembly of the external unit: risks and nuances
The external unit of the air conditioner Xiaomi is dismantled only in extreme cases - to replace the compressor, clean the radiator or repair the fan.
- ⚡ High-voltage connections (up to) 380V triphasic).
- ❄️ Freon tubes under pressure up to 25 bar.
- ⚙️ Moving parts (fan, compressor).
Procedure:
- Turn off the power on the shield.
- Stripe Freon through the service port (requires a gauge collector).
- Unscrew the block mounts to the wall (usually 4 bolts) M8).
- Remove the top cover by disconnecting the sensor wires.
⚠️ Warning: If you are unsure of your refrigeration skills, do not pour freon yourself. contact the service center - the cost of refueling after improper etching may exceed 5000₽.
Inside the outer block you will find:
- 🌀 Compressor - the "heart" of the system, pumps Freon along the circuit.
- 🌀 Capacitor – radiator for cooling the refrigerant.
- 🌀 Fan - blows the condenser, often clogged with down.
- 🌀 Four-way valve (in models with heating).
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Cleaning the radiator of the outer unit increases the efficiency of the air conditioner by 15-20%. Use a steam generator or a soft brush, but do not damage the ribs of the heat exchanger.
Typical malfunctions after disassembly and how to avoid them
Even with a careful disassembly, Xiaomi’s air conditioner may not work properly, and here are the most common problems and their causes:
| Symptoms. | Possible cause | Decision |
|---|---|---|
| Not included. | Unconnected card or sensor connectors | Check all connections from photos |
| Noise at work | Incorrect assembly of the fan or hitting foreign objects | Disassemble and reassemble, making sure the blades are balanced |
| It's not cooling. | Freon leakage or air in the system | Requires vacuuming and refueling |
| Blinking error indicator | Short circuit on the board or sensor malfunction | Diagnostics with a multimeter or replacement of a module |
If the air conditioner makes an error after assembly (for example, E1 or E5 On the display of Xiaomi, check the error code table in the FAQ.
How to avoid problems:
- 📸 Take photos of each step – especially the location of wires and tubes.
- 🧲 Use a magnetic screwdriver – screws in the air conditioner are small and easily lost.
- 🧼 Do not use aggressive detergents – they can damage plastic or rubber seals.
When the disassembly will not help: signs of serious breakdowns
Not all Xiaomi air conditioning malfunctions can be fixed by yourself.
- 🔥 The compressor does not start, but the charge is good (may require replacement).
- ❄️ Freezing of tubes on the outer block (freon leakage or capillary tube clogging).
- 💥 Extraneous sounds in the compressor (knocking, grinding) - a sign of wear of the piston group.
- 📉 Performance drop of more than 30% (requires diagnosis of freon pressure).
Cost of repair in the service:
- Compressor replacement: 8000–15000₽.
- Freon leakage elimination: 3000–6000₽.
- Cleaning of vacuum system: 2500-4000₽.
If your Xiaomi air conditioner is warranty, do not disassemble it yourself - this will void warranty obligations. In the case of a factory defect (for example, Freon leaks in the first 2 years of operation), repairs will be free.