Compressor failure is one of the most serious problems that the owner of refrigeration equipment may encounter. It is this unit that is the “heart” of the system, ensuring the circulation of the refrigerant and creating the necessary pressure to cool the chambers. If you notice that your Biryusa refrigerator has stopped freezing, but continues to work silently or, conversely, makes strange sounds and then goes silent, most likely the problem lies in the motor.
Independent replacement of this unit requires not only the presence new compressor, but also specialized tools, as well as knowledge in the field of electrical engineering and working with refrigerants. It is important to understand that the process involves breaking the tightness of the circuit, which implies subsequent evacuation and refilling with freon. Without following the technology, repairs may turn out to be useless or even dangerous.
In this article we will analyze the entire process in detail: from initial diagnostics and selection of compatible spare parts to the final launch of the system. We will look at the nuances of working with various brand models Biryusa, including modern inverter options and classic linear motors, so that you can assess your strengths and risks before starting work.
Diagnostics of compressor malfunction
Before you begin disassembling the unit and purchasing expensive spare parts, you need to make sure that the problem lies in the compressor. Often, symptoms indicating a motor breakdown can be caused by a malfunction of the thermostat, start relay, or freon leak. The initial inspection begins with listening to the operation of the unit: a working engine emits a smooth, monotonous hum, while a faulty one may click, hum with overload, or not start at all.
One of the key indicators is the body temperature. If you touch the rear grille or the engine itself, and it is icy, although it should be warm, or, on the contrary, it is hot to the point where it is impossible to touch, this is a signal of a violation of the operating cycle. It is also worth paying attention to starting relay: if it often clicks when trying to start the motor, but is unsuccessful, this may indicate an interturn short circuit of the windings or a wedge of the piston group.
⚠️ Attention: If you hear a loud click when trying to start, followed by humming, and after a few seconds the thermal protection is triggered, under no circumstances try to turn on the refrigerator again for a long time. This can lead to complete combustion of the windings and fire of the wiring.
For more accurate diagnostics, professionals use a multimeter. Checking the resistance of the windings allows you to identify an open or short circuit. Normal resistance values for different models Biryusa may differ, so it is important to check the technical documentation. If the resistance between the contacts tends to infinity or zero, the compressor must be unconditionally replaced.
Selecting a suitable compressor for replacement
Selecting a new unit is a critical stage on which the durability of the repair depends. Compressors for refrigerators Biryusa can be linear (piston) or inverter, and they are not always interchangeable. The main parameters for selection are the cooling capacity (measured in watts or kcal/h), the type of refrigerant (R134a or R600a) and the overall dimensions of the seats.
The most common option for domestic refrigerators are brand compressors Atlant, which are often installed at the manufacturing plant. Models from Danfoss (Secop) and Embraco are also popular. When choosing, pay attention to the diameter of the tubes: in modern models they can be steel, which requires the use of a special torch and solder, or copper, which simplifies soldering.
Below is a table of correspondence of popular compressor models that are often used in equipment repair Biryusa:
| Compressor model | Refrigerant type | Cooling capacity | Compatibility |
|---|---|---|---|
| Atlant 120-XXX | R134a | High | Biryusa 6, 8, 10, 11, 12 |
| Atlant 140-XXX | R600a | Average | Biryusa 130, 131, 132 |
| Secop TL57 | R134a | High | Universal analogue |
| Embraco T60 | R600a | Low | Small-sized models |
It is important to consider that installing a compressor with a higher power than provided by the design can lead to overload of the evaporator and condenser, as well as to improper operation of the thermostat. Therefore is strictly not recommended installing motors whose cooling capacity differs from the original by more than 10-15%.
Necessary tools and materials
High-quality repairs are impossible without the appropriate equipment. To replace the compressor in a refrigerator Biryusa you will need not only a standard locksmith kit, but also specific equipment for working with the refrigeration circuit. The basic set includes wire cutters, pliers, a set of screwdrivers and keys for dismantling panels and fastening the unit itself.
Particular attention should be paid to tools for working with tubes. You will need a pipe cutter, which provides an even cut without deforming the metal, and a rolling machine if you plan to connect pipes using the rolling method. However, the soldering method is most often used, which requires a gas torch (propane-oxygen or propane-air) and solder.
- 🔥 Gas torch with a set of nozzles for uniform heating.
- 🔩 Solder (silver PSR-15, PSR-25 or copper-phosphorus for copper).
- 🧹 Flux (borax or specialized flux for soldering).
- 🔧 Vacuum pump and pressure gauge station for charging freon.
- ⚖️ Scales for accurate dosage refrigerant.
Don't forget to prepare personal protective equipment. Working with open flames and gas under pressure requires caution. Be sure to wear safety glasses and gloves, as hot tubing and flux splashes can cause burns. Also have a fire extinguisher on hand just in case.
Dismantling the old compressor
The replacement process begins by completely disconnecting the refrigerator Biryusa from the power supply. This is the first and immutable rule of safety. After this, the unit must be moved away from the wall, providing access to the rear. Remove the protective panel covering the engine compartment and visually inspect the condition of the wiring and pipes.
The next step is removing the old refrigerant. In a factory setting, this is done with a puncture, but at home, they often simply cut through the filling tube. After this, you need to disconnect the electrical contacts. Take a photo of the connection diagram or carefully mark the wires so that when installing a new motor you do not confuse phase, neutral and ground. Unscrew the bolts securing the compressor to the frame.
⚠️ Attention: Before biting off the tubes, make sure that there is good ventilation in the room. Although modern refrigerants are not toxic in small doses, they are heavier than air and can displace oxygen, and when exposed to an open flame, they decompose to form harmful compounds.
Now you can begin to disconnect the copper tubes. Heat the soldering joints with a torch and carefully remove the condenser and suction tubes. Be careful not to damage the capillary tube if you plan to keep the old capacitor. If the old compressor is mounted on bushings, they should also be replaced with new ones, since the rubber loses its elasticity over time and will not dampen vibration.
☑️ Dismantling the equipment
Installation and soldering of a new unit
Installation of a new compressor begins with preparing the seat. Clean the frame from rust and dirt, and if necessary, touch up the metal elements to prevent corrosion. Attach the new motor to the new rubber bushings, making sure that it is level and does not touch the casing walls or other structural elements.
Soldering tubes requires skill. If you are using copper solder, you may not need flux, but for silver solder it is required. Heat the tube evenly as you inject solder into the joint area. It is important not to overheat the soldering area so that oxides do not form inside the tube, which will subsequently clog the system. Pay special attention to the filter-drier: it must be changed every time the circuit is opened.
The filter-drier is installed vertically, the arrow on the body should indicate the direction of freon movement (from the condenser to the evaporator). Soldering of the filter must be done quickly so as not to overheat its body, since there is silica gel inside, which loses its properties when heated strongly. After soldering all connections, it is necessary to carry out pressure testing with nitrogen to check the tightness.
The pressure testing process is as follows: a nitrogen cylinder is connected to the system, the pressure rises to 10-12 atmospheres. All soldering joints are checked with a soap solution for bubbles. If the system maintains pressure for 30-60 minutes without a drop in performance, you can proceed to evacuation.
Evacuation and refrigerant charging
Evacuation is the process of removing air and moisture from the refrigerator circuit Biryusa. The presence of moisture in the system is fatal to the compressor and capillary tube, since at low temperatures the water freezes, forming an ice plug. To do this, a vacuum pump is connected to the service pipe. The pump operating time ranges from 15 to 30 minutes, depending on the power of the equipment.
After creating a vacuum, the system is charged with refrigerant. The type of refrigerant (R134a or R600a) must strictly correspond to the marking on the refrigerator nameplate. Refilling is carried out in the liquid phase (if R134a is used) or in the gas phase (for R600a, since it is fire hazardous and requires special care). The amount of freon is controlled by weights, according to the model's passport data.
Why can't you refill "by eye"?
A lack of freon will lead to overheating of the compressor and insufficient cooling, and an excess will cause water hammer and destruction of the motor valves. Accurate dosage is critical for the longevity of the system.
After refueling, it is necessary to seal the filling tube. This must be done carefully, squeezing the tube with a clamp and sealing the biting area. Then the refrigerator is turned on to the network to check operation. Evaluate the uniformity of cooling of the evaporator, the temperature in the chambers and the noise level. The motor should not vibrate or knock.
Frequently asked questions (FAQ)
Is it possible to replace the compressor R134a to R600a in the Biryusa refrigerator?
Theoretically this is possible, but it requires a complete flushing of the system, changing the oil and reconfiguring the thermostat. In practice, such a replacement is not economically feasible and technically difficult for a home craftsman, since the systems have different operating pressures and types of oils.
How long does it take to replace a compressor?
For an experienced technician with all the equipment, the process takes from 1 to 2 hours. For a beginner doing the job for the first time, taking into account preparation, soldering and waiting for the results of crimping, this can take 3-4 hours or more.
Why does the new compressor get hotter than the old one?
A slight increase in the temperature of the new motor housing in the first hours of operation is normal, parts are being ground in. However, if it becomes red hot or shuts down due to overload, there may be air left in the system, the filter drier is clogged, or the power of the unit is incorrectly selected.
Is it necessary to change the condenser when replacing the compressor?
Replacing the condenser (heat exchanger) is not necessary if it does not have external damage and is not clogged with dust. However, if the old compressor burns out with the release of oil combustion products, flushing the condenser is mandatory, otherwise dirt will quickly damage the new motor.