Owners of domestic brand refrigeration equipment Pozis often face the need to understand the technical contents of the unit, especially when it comes to the heart of the system - the compressor. It is this unit that is responsible for circulating the refrigerant and maintaining the set temperature in the chambers. Understanding which motor is installed in your model is critical when planning repairs or preventative maintenance.
The plant in Naberezhnye Chelny, which produces equipment under this brand, has used units from various manufacturers over many years of cooperation with different component suppliers. In different series and years of production, you can find both reliable European or Japanese mechanisms, as well as more budget options. Identification of the type of compressor This is the first step towards proper diagnosis of problems, because the complexity of repairs and the availability of spare parts depend on this.
In this article we will analyze in detail which compressors are used in refrigerators Pozis, what are their design features and how to independently determine the device model. You will learn about signs of wear, methods for checking functionality and nuances that must be taken into account before starting any work on the refrigeration circuit.
Main types of compressors in Pozis technology
By analyzing the range of refrigerators Pozis of different years of production, we can identify several main suppliers of compressor units. Most often in budget and mid-range lines there are piston compressors, which have proven themselves to be quite reliable and maintainable devices. However, in more modern models with a system No Frost or improved energy consumption, other options can be installed.
One of the most common options is the company's products Donper. These Chinese units are massively installed on many models Pozis RK-109, RD-149 and other popular series. They are distinguished by a compact body and a relatively low noise level, although during long-term operation (more than 7-10 years) they may require replacement of the starting relay or the motor itself.
Also in older or specific models you can find compressors Secop (Danfoss) or Embraco. These brands are considered the standard of reliability in the industry. If just such a unit is installed in your refrigerator, then the likelihood of its failure is much lower, and the service life is calculated in decades. European compressors often have a higher cost, but provide better energy efficiency.
⚠️ Attention: Technical specifications and component suppliers may vary depending on the production batch. The manufacturer has the right to replace one type of compressor with another with similar parameters without prior notice.
How to determine the model and manufacturer of the compressor
To accurately identify the compressor installed in your refrigerator Pozis you do not need to be an expert refrigeration equipment. All the necessary information is usually printed on a metal nameplate (sticker or engraving) located directly on the motor body. To access it, you will need to move the refrigerator away from the wall and remove the back metal panel at the bottom of the unit.
On the nameplate you will find the serial number, the type of refrigerant (for example, R600a or R134a), supply voltage and, most importantly, the model marking. Often the model begins with a letter code indicating the manufacturer, for example QD for Donper or NL for Secop. Write these down data before searching for a spare part, since the visual similarity of different models can be deceiving.
Sometimes the sticker on the compressor itself may be damaged or worn out. In this case, you can use the technical documentation that comes with the refrigerator, or find information on the manufacturer’s website using the full model number of the refrigerator, which is indicated on the inner wall of the chamber or on the door.
Comparative table of characteristics of popular models
Different models of compressors have different technical parameters that affect the performance of the refrigerator and the level of noise generated. Understanding these differences helps you choose the right replacement or evaluate the performance of your current unit. Below is a table with average data for common types of motors in technology Pozis.
| Manufacturer | Refrigerant type | Power (W) | Noise level | Resource work |
|---|---|---|---|---|
| Donper (QD series) | R600a / R134a | 90 - 130 | Average | 7-10 years |
| Secop (Danfoss) | R600a | 100 - 140 | Low | 12-15 years |
| Embraco | R600a | 95 - 135 | Low | 10-14 years |
| Atlant | R600a | 100 - 120 | Medium/High | 7-9 years |
As can be seen from the table, compressors at refrigerant R600a (isobutane) are standard for modern models Pozis. They are more economical and require less freon for refilling compared to older R134a. However, when replacing, it is important to take into account not only the type of gas, but also production power (in watts or BTU) so that the cooling system works correctly.
Using a compressor with reduced power will result in the refrigerator not reaching the desired temperature and the motor will run non-stop. Conversely, installing a unit that is too powerful can cause frequent switching on and off, which is also harmful to the system.
Signs of a compressor malfunction
Diagnostics of the condition of the compressor is a key step before deciding on repairs. There are a number of obvious signs indicating that the motor has failed or is operating with critical problems. One of the first symptoms is a refrigerator without shutdown cycles, while the temperature in the chambers may not drop to the required values. constant operation refrigerator without shutdown cycles, while the temperature in the chambers may not drop to the required values.
Another alarming signal is a characteristic click when trying to start, followed by silence. This often indicates a problem with the start relay or a turn-to-turn short in the motor windings. If at the same time the compressor gets very hot (becomes hot to the touch in a short time), then the probability of its malfunction is extremely high.
- 🔊 Loud knocking or humming: Non-standard sounds during operation may indicate wear and tear on the internal mechanical parts of the piston group.
- 🌡️ Lack of cold: When the engine is running and in a clean condenser, the lack of cooling indicates a loss of compressor performance.
- ⚡ Knocking out plugs: A short circuit in the motor windings triggers the protective automatics in the apartment.
It is possible Is it possible to repair the compressor?
At home, a full repair of the compressor (replacing valves, rewinding) is impossible. Requires special equipment and skills. Usually, the unit is completely replaced with a new one.
Instructions for preparing to replace the compressor
Replacing a compressor in a refrigerator Pozis is a complex technical procedure that requires special tools and skills. If you are determined to do the work yourself, you need to prepare thoroughly. Remember that incorrect soldering or violation of the charging technology can permanently damage the equipment.
First of all, you need to purchase a new compressor that strictly matches the characteristics (power, type of refrigerant, diameter of fittings) of the failed one. You will also need a new filter drier, since the old one, when the circuit is opened, becomes saturated with moisture and loses its properties. Reusing the filter is prohibited.
To carry out the work you will need the following set of tools and materials:
- 🛠️ Torch (gas or oxygen-acetylene) for soldering copper tubes.
- 🌬️ Vacuum pump and manometric station for pumping air and controlling pressure.
- ⚖️ Scales for accurate dosage refrigerant when filling.
- 🔧 A set of keys, pliers and side cutters for dismantling fasteners.
☑️ Preparation for replacing the compressor
⚠️ Attention: The refrigerants used in refrigerators (isobutane R600a) are flammable gases. Soldering and refueling work must be carried out in a well-ventilated area away from open fire, observing all fire safety measures.
The process of dismantling and installing a new unit
The replacement process begins with dismantling the old compressor. After removing the protective panel and removing the thermal insulation (if it blocks access), you need to cut the copper tubes that go to the motor. It is important to do this carefully so as not to damage other elements of the system. Then the compressor is unscrewed from the frame and removed.
On a new compressor, it is necessary to remove the transport plugs only immediately before soldering to prevent moisture and dust from getting inside. Installation is carried out in the reverse order: the motor is mounted on shock absorbers, copper suction and discharge pipes are soldered to the fittings. Pay special attention to the quality of soldering - the seam must be tight and even.
After installing the motor, be sure to replace the filter drier. It is soldered into the rupture of the capillary tube. Follow the direction of flow indicated by the arrow on the filter housing. Failure to comply with the flow direction will lead to instant failure of the new compressor.
After the mechanical installation of all elements, the system is evacuated. This is a mandatory step to remove air and moisture vapor from the circuit. Pumping time depends on the power of the pump, but is usually at least 15-20 minutes. Only after creating a vacuum is the refrigerator filled with freon.
Frequently asked questions (FAQ)
Is it possible to replace a Donper compressor with a Secop in a Pozis refrigerator?
Yes, such a replacement is possible if the new compressor matches the power (in watts or BTU), type of refrigerant and has similar mounting dimensions. However, it may be necessary to adjust the copper tubes and replace the start relay, since the electrical characteristics may differ between brands.
Why is the new compressor louder than the old one?
The noise level depends on the design of the motor and the quality of the installation. If the compressor is not secured tightly or vibrates against the housing or tubes, the noise will increase. Also, some compressor models initially have a higher operating sound. Check the rubber shock absorbers and the distance to metal parts.
How much does it cost to replace a compressor at a service center?
The cost consists of the price of the unit itself and the work of the technician. On average, replacing a compressor in a refrigerator Pozis can cost from 6 to 12 thousand rubles, depending on the region, model of the refrigerator and the type of compressor used. It is better to check the exact price at authorized service centers.
Is it necessary to flush the system when replacing a compressor?
Flushing the system with nitrogen is mandatory if the old compressor has burned out and released oil into the circuit. This is necessary to remove combustion products and contaminants. If the replacement is planned or the compressor simply stops pumping without burning, it is enough to replace the filter-drier and bleed the system.