What compressors are installed on the Atlant refrigerator: full review

When a characteristic hum, knocking or complete absence of cold in the chamber occurs, the first thing the owner asks is about the type of engine installed. Understanding what compressors are installed on the Atlant refrigeratoris key for competent diagnosis and successful repair. The Belarusian plant has been using its own engines for a long time, but in recent years the line has expanded significantly with the help of foreign partners.

Knowledge of the markings and technical characteristics of the motor allows you not only to select an exact replacement, but also to avoid common mistakes during service. In this article, we will analyze in detail the evolution of units used in household appliances Atlantand answer the most frequently asked questions from service engineers.

The modern spare parts market is overflowing with offers, but Atlantov is characterized by a high degree of compatibility of native units. It is important to distinguish between inverter systems and classic linear models, since their design and operating principle are radically different. Let's look at the main types of motors that can be found in everyday life.

Main types of compressors in Atlant technology

Historically, the Atlant plant equipped its products mainly with units of its own design. This made it possible to control quality and reduce the cost of the final product. However, depending on the series of the refrigerator and the year of manufacture, there may be a motor of different design and manufacturer inside.

The most common option is piston compressor linear type. Its operation is based on the reciprocating movements of a piston, which compresses the refrigerant and pushes it through a system of tubes. Such motors are reliable, but have a characteristic noise during startup and operation.

⚠️ Attention: When trying to replace the motor with an analogue from another manufacturer (for example, Danfoss or LG), be sure to double-check the overall dimensions of the mounting holes and the height of the casing. A discrepancy of even a few millimeters can make installation impossible without modifying the case.

In more expensive and modern models, especially in series with the system No Frost, quieter and more economical solutions are often used. The company's engineers have introduced various modifications to meet the growing requirements for energy efficiency of classes A and A+.

• 🔧 Linear models: Classical design with a single piston, operating in a cyclic mode (on-off).
• 🔧 Inverter systems: Motors with continuously variable speed control, ensuring constant temperature and low level noise.
• 🔧 Double-motor schemes: In refrigerators with two chambers, two separate compressors are often installed for independent temperature control.

The choice of a specific type depends on the model of the refrigerator. If you are planning a renovation, you need to accurately identify the current device. To do this, it is not necessary to open the casing right away - just look at the nameplate or tag on the back wall of the unit.

The plant's own developments: the MT and KSh series

For a long time, the calling card of the brand were the compressors of the MT i KShseries, which were produced at the facilities of the plant itself or its subsidiaries. These units have proven themselves as "workhorses" capable of operating for decades with minimal maintenance.

Series MT (for example, MT-101, MT-102, MT-103) is hermetic piston compressors designed to work with R134a and R600a refrigerants. They are distinguished by high maintainability and availability of spare parts in the post-Soviet space. The number in the marking often indicates the cooling capacity.

In turn, the series KSh (for example, KSh-100, KSh-120) was also widely used in classic two-chamber refrigerators. A feature of these motors is their versatility and adaptability to voltage drops in the electrical network, which is important for many regions.

Technical nuances of the MT series

MT series compressors often have a specific angle of inclination of the tubes. When replacing with an analogue from another brand, it may be necessary to extend the copper pipes or use adapters, since the standard diameter may not match.

It is important to note that despite the common platform, modifications may differ in the type of oil and refrigerant used. Replacing one refrigerant with another (for example, from R12 to R134a) requires a complete flushing of the system and replacement of the filter-drier.

• 🏭 Performance: Models range from low productivity for single-chamber refrigerators to powerful units for large volumes.
• 🏭 Refrigerant type: Most modern versions run on environmentally friendly freon R134a or isobutane R600a.
• 🏭 Voltage: Standard supply voltage is 220-230V at a frequency of 50Hz.

When searching for a spare part for old Atlant models, you most often have to look for these series. They may be marked as "OJSC Atlant" or have the plant logo on the metal casing.

Imported components: Danfoss, Secop and Embraco

In pursuit of increasing energy efficiency and reducing noise levels, the manufacturer began to actively introduce imported components. In different batches of refrigerators Atlant you can find engines from world leaders in the industry, such as Danfoss (now Secop), Embraco and Tecumseh.

Compressors Danfoss (BD, FR, NL Series) are considered one of the most reliable in its class. They are distinguished by their compact size, low power consumption and very quiet operation. Often such motors were installed in premium series of refrigerators or in models intended for export.

⚠️ Attention: Imported compressors may have a different connection diagram for the starting relay. Before installation, be sure to check the electrical diagram on the body of the new motor with the wiring of your refrigerator.

Motors from the company Embraco were also often found in Atlant assemblies. This is a Brazilian brand that has earned a reputation for producing ultra-reliable units. Their design often involves the use of more durable materials and bearings with increased wear resistance.

The difference between imported units and domestic analogues often lies in the assembly technology and winding materials used. For example, some models Secop use internal overheating protection built directly into the winding, which increases operational safety.

• 🌍 Production geography: Parts can be produced in Denmark, Germany, China or Brazil, depending on the plant contract.
• 🌍 Efficiency: Imported models often have a higher COP coefficient (the ratio of cooling capacity to power consumption).
• 🌍 Price: The cost of imported compressors is usually higher than that of domestically produced analogues.

The presence of an imported compressor in the Atlant refrigerator does not make it beyond repair. There are many universal analogues on the market that are suitable in terms of fit dimensions and electrical characteristics.

Compatibility table and technical characteristics

To simplify the search for a replacement, below is a table showing the main parameters of popular compressor models that were installed on various refrigerators Atlant. This data will help you navigate the variety of markings.

Pay attention to the type of refrigerant. The use of a compressor designed for R134ain a system where R600a (isobutane) circulates is strictly prohibited without completely reconfiguring the system and changing the oil, since they are chemically and physically incompatible.

Engine power directly affects the speed of freezing products. For large refrigerators with a chamber volume of more than 300 liters, models with a power of 1/4 hp are usually used. and above. Low-power units may not be able to cope with the load, which will lead to their rapid failure.

Inverter technologies in Atlant refrigerators

Models equipped with inverter compressordeserve special attention. Unlike traditional motors, which operate in a start-stop mode, inverter units are able to smoothly regulate the speed of rotation of the motor. This allows you to maintain the set temperature with minimal fluctuations.

In refrigerators Atlant such systems have begun to appear in more modern lines. The main advantage is significant energy savings and reduced noise levels. The absence of constant start-up cycles reduces wear and tear on mechanical parts.

However, inverter systems also have their own characteristics. They are more sensitive to voltage drops in the network and require the use of high-quality stabilizers. Repairing such electronics is more difficult and more expensive than replacing a conventional starting relay.

• ⚡ Principle of operation: The engine does not turn off completely, but reduces the speed to a minimum to maintain the temperature.
• ⚡ Savings: Electricity consumption can be lower by 20-30% compared to classic ones models.
• ⚡ Durability: The resource of inverter motors is declared by the manufacturer to be up to 10 years or more.

If your refrigerator is equipped with an inverter, in case of breakdown it is extremely important to use original spare parts or certified ones analogues. Installing a cheap non-inverter compressor will require changing the entire electrical control circuit.

Fault diagnosis and signs of breakdown

Before looking for a replacement, you need to make sure that the problem lies in the compressor. Often, symptoms similar to engine failure can be caused by a malfunction of the thermostat, start relay, or freon leak.

One ​​of the main signs of a malfunction is lack of startup or a characteristic click, after which the engine hums for several seconds and goes silent. This may indicate jamming of the piston group or breakdown of the winding.

It is also worth paying attention to the temperature of the housing. If the compressor works, but does not cool, and at the same time its housing heats up to temperatures above 90 degrees, this is an alarming signal. Normally, the motor should be hot, but not scalding.

⚠️ Attention: Checking the resistance of the windings and the integrity of the circuit should only be carried out with the refrigerator completely disconnected from the network. Working with electricity requires compliance with safety regulations.

If the compressor runs continuously without turning off, and the temperature in the chambers is too low or, conversely, high, the problem may be a loss of performance. The piston group could be worn out, and the motor does not create the necessary pressure in the system.

Replacement process and important installation nuances

Replacing a compressor in a refrigerator Atlant is a complex technical process that requires special equipment. You will need a pipe bender, a torch, a vacuum pump, a pressure gauge station and a scale for charging the refrigerant.

The first step is always the vacuuming system. After installing the new motor and soldering the tubes, it is necessary to remove air and moisture from the circuit. Residual moisture in the system will lead to the formation of ice plugs and acids, which will destroy the compressor from the inside.

The amount of refrigerant charged must strictly correspond to the data on the refrigerator nameplate. Under-filling or over-filling are equally harmful to the operation of the unit. Dosage accuracy is critical for the correct operation of the capillary tube.

• 🛠️ Soldering: Use silver solder to connect copper tubes, this will ensure the tightness and strength of the seam.
• 🛠️ Filter drier: Whenever the circuit is opened, a filter drier is required replacement.
• 🛠️ Protection: Install a new thermal protection and starting relay corresponding to the parameters of the new engine.

After completion of work, it is necessary to check the tightness of the connections with a soap solution and check the operation refrigerator for several hours. Only after this can you load products.

FAQ: Frequently asked questions

Is it possible to replace the MT-101 compressor with an MT-103?

Yes, such a replacement is possible, since the landing their sizes are identical. However, the MT-103 is more powerful, so the refrigerator will freeze faster, but may consume a little more electricity. It is important to check the compliance of the starting relay.

Why is the new compressor humming?

The hum can be caused by vibration of the tubes against the housing or cabinet walls. The cause may also be incorrect installation (misalignment) or a defect in the new unit itself. If it hums louder than the old one, perhaps this is a feature of the model.

How much does it cost to replace a compressor in Atlanta?

The cost consists of the price of the engine itself (from 3,000 to 8,000 rubles, depending on the model) and the cost of the work of the master. On average, the service costs 50-70% of the cost of a new budget refrigerator.

Is it necessary to flush the system when replacing a compressor?

If the old compressor burns out and releases oil into the system, flushing with nitrogen is mandatory. If the replacement is planned due to a leak or mechanical wear without burning the windings, it is enough to replace the filter drier and vacuum the system.