Owners of brand household appliances Atlant often face the need to understand what exactly is happening inside their refrigerator during operation. The main component that provides cooling is the compressor, which is often called the “heart” of the system. It is on its serviceability and characteristics that it depends whether the food will remain fresh and the ice in the freezer will remain solid.
Many users do not think about the internal structure until extraneous noise appears or the temperature in the chambers rises. However, knowing what which compressor is installed in your model helps to quickly diagnose the problem during repair. In this article we will analyze in detail the functions of this unit and the features of its operation in Belarusian refrigerators.
Understanding the principle of operation of the motor allows you to avoid common mistakes during operation. For example, frequently opening the door or loading hot food causes the unit to work at its limit. Let's find out exactly how this system works and what you need to pay attention to first.
⚠️ Attention: Before starting any work on diagnosing or replacing the compressor, be sure to disconnect the refrigerator from the power supply. Working with electrical components without appropriate qualifications can be life-threatening.
The main function of the compressor in the cooling system
The main task of the compressor is to create a pressure difference in the cooling system. It compresses the refrigerant (freon), turning it from a gaseous state into a liquid under high pressure. This process occurs in a condenser, usually located on the back wall of the device, where the gas gives off heat to the environment.
After passing through a filter drier and a capillary tube, where the pressure drops sharply, the refrigerant enters the evaporator. There it boils at low temperatures, actively absorbing heat from the interior of the refrigerator chambers. The cycle closes when the freon vapor is again sucked in by the compressor.
In models Atlant with a system No Frost or mixed cooling the role the motor is especially large. It needs to maintain stable pressure to operate not only the main circuit, but also additional defrosting systems. If the motor is weak or worn out, the refrigerator will no longer reach the desired temperature, even if there is no freon leak.
Types of compressors used in Atlant refrigerators
Over the years, the manufacturer has used various types of engines. In old models and budget series, they were most often found piston compressors with a crank mechanism. They are reliable, but create a higher level of noise and vibration compared to modern analogues.
Modern lines Atlant are increasingly equipped with more efficient units. Inverter models, although less common, appear in the premium segment of the brand. They allow you to smoothly regulate the speed of rotation of the shaft, which saves energy and reduces wear of mechanical parts.
- 🔹 Piston: The classic design, proven over decades, is easy to repair, but noisy.
- 🔹 Crank-yoke: Used in many middle-class models, they are compact and have a moderate noise level.
- 🔹 Inverter: Modern standard of energy efficiency, quiet operation, but high sensitivity to voltage drops.
You can determine the type of engine installed by the marking on the nameplate located on the body of the compressor itself. Most often in refrigerators Atlant you can find units produced by Atlant (our own plant), Danfoss (now Secop) or Embraco. Each of them has its own installation and connection features.
Why the motor-compressor answers: detailing the processes
Many people mistakenly believe that the compressor simply “drives” gas. In fact, it performs the function of a pump that creates the necessary conditions for phase transitions of the refrigerant. Without compression, which provides motor-compressor, freon would not be able to condense at room temperature.
In two-compressor models Atlant each motor is responsible for its own cooling circuit. One ensures the operation of the refrigeration chamber, maintaining a temperature of about +4°C, and the second - the freezer, where the values reach -18°C and below. This allows you to independently control modes and save resources when defrosting one of the compartments.
The compressor is also responsible for circulating oil in the system. Part of the special refrigeration oil is mixed with freon and circulates with it, lubricating the rubbing parts. If the oil thickens or its level drops, the shaft jams. bearing wear and shaft jamming.
⚠️ Attention: The compressor characteristics (capacity, refrigerant, oil type) must strictly comply with the requirements of the specific refrigerator model. Installing an unsuitable motor will lead to rapid failure of the entire system.
How to determine the model and characteristics of the compressor
To correctly select a spare part or analyze a fault, you need to know the exact model of the unit. The information is usually placed on a metal tag attached to the motor housing. In refrigerators Atlant it is often located at the bottom, at the back, next to the start relay.
The nameplate indicates key parameters: refrigerant type (R134a, R600a), power in watts or BTU, supply voltage and rotation speed. There is also Catalogue numberthere, which is the easiest way to find a replacement. For example, the marking may begin with the letters C, K or H, which indicates the series and manufacturer.
| Parameter | Designation | Value for Atlant |
|---|---|---|
| Type refrigerant | Refrigerant | R134a / R600a |
| Power | Power / HP | 1/5 - 1/4 hp |
| Voltage | Voltage | 220-240 V |
| Frequency | Frequency | 50 Hz |
| Manufacturer | Brand | Atlant / Secop |
If the tag is not readable or lost, you can focus on the overall dimensions and location of the tubes. However, this method is less accurate. In difficult cases, it is recommended to check the technical documentation for a specific refrigerator model Atlant, which indicates the type of recommended compressor.
What do the letters in the marking mean?
The letter "C" at the beginning often indicates compressors of normal capacity, "H" - high, and "L" - low. Also, the letters can indicate the type of refrigerant for which the unit is intended.
Symptoms of malfunction and diagnosis of problems
You can understand that the compressor is not working correctly by a number of external signs. The most obvious is that the refrigerator has stopped freezing, but the motor is either silent or hums, but does not start. It can also be observed overheating of the housing of the motor when it is impossible to touch it with your hand.
Frequent switching on and off (clocking) indicates problems with the thermostat or loss of performance of the compressor itself. If the motor hums, clicks and immediately turns off, most likely the starting relay has burned out or a winding break has occurred.
- 🔸 Loud knocking: Indicates destruction of internal mechanical parts, valves or connecting rods.
- 🔸 Humming without starting: Characteristic of jamming of the piston group or malfunction of the starting device.
- 🔸 Lack of vibration: If the motor turns on, but the tubes do not vibrate, the seal may be broken or there is no freon.
For accurate diagnosis, technicians use a pressure gauge a station for measuring pressure in the system and a current clamp for checking current consumption. Exceeding the rated current indicates an overload of the motor, and an underestimate indicates a loss of compression.
Replacing a compressor: difficulties and nuances
Replacing a compressor in a refrigerator Atlant is a complex technical process that requires special equipment. You cannot simply unscrew the old one and screw in the new one, since the system must be absolutely sealed and vacuum-sealed. Requires welding of copper tubes in a protective gas environment or the use of a torch.
The most important step is evacuation of the system. Before charging with freon, it is necessary to remove air and moisture from the circuit using a vacuum pump. The remaining moisture will turn into ice and clog the capillary tube, leading to repeated failure.
The filter drier also needs to be replaced. This element collects moisture and oil breakdown products and should not be reused. When installing a new motor, oil refilling is often required if the new compressor does not have enough oil for the specific length of the refrigerator route.
⚠️ Attention: Replacing a compressor yourself without a vacuum pump, pressure gauges and skills in soldering copper pipes is almost guaranteed to lead to damage to the equipment. Freon under pressure can be dangerous.
☑️ What is needed to replace a compressor
Service life and extension of unit life
Average compressor service life in refrigerators Atlant is from 10 to 15 years, subject to proper operation. However, the actual figure depends greatly on operating conditions. Constant operation at maximum loads reduces the resource of the electric motor mechanics.
To extend the life of the motor, it is important to ensure good ventilation of the rear wall. Dust on the condenser (grid at the back) impairs heat transfer, causing the compressor to work longer and harder to achieve the set temperature. Regular vacuuming is a simple but effective preventative measure.
You should also avoid installing the refrigerator near heating appliances or in direct sunlight. High ambient ambient temperatures force the cooling system to work with increased efficiency, which accelerates wear.
Stable voltage in the network is another key factor. Voltage surges can damage the windings or control electronics (in inverter models). Using a surge protector or voltage stabilizer will help protect an expensive component from premature death.
Is it possible to replace a single-chamber compressor with a two-chamber one?
Theoretically, this is possible if the mounting dimensions, type of refrigerant and performance are the same. However, dual-chamber models are often more powerful. Installing a more powerful motor can lead to faster cooling, but also to increased energy consumption and noise. The thermostat needs to be reconfigured.
Why does the Atlant compressor get very hot?
Heating to 70-90 degrees for the compressor is a normal operating mode. If the temperature is critical and a burning smell is felt, this may indicate an interturn short circuit, jamming or clogging of the system, due to which the motor runs without stopping.
Which compressor is quieter: Atlant or imported?
Own compressors Atlant are considered quite noisy by modern standards standards Imported analogues, such as Secop (former Danfoss) or Embraco, often work quieter and have a longer service life, but their cost and selection complexity are higher.
Is it worth repairing an old compressor or replacing it?
Repairing the compressor itself (rewinding, replacing valves) is impossible at home, and in service it is often unaffordable in cost. In 95% of cases, it is recommended to completely replace the unit with a new or high-quality refurbished analogue.