Where is the relay of the Biryusa refrigerator: search and replacement

If your refrigerator Biryusa stops freezing, but at the same time makes a characteristic clicking and buzzing noise that stops abruptly, most likely the problem lies in the start-up relay. This small but critical element is responsible for starting the compressor and protecting its windings from overheating. Understanding exactly where it is located and what it looks like is the first step to independently restoring the functionality of the equipment.

In two-chamber models of this brand, the design is usually standard, but the arrangement of parts may vary slightly depending on the year of manufacture. You do not need complex equipment for initial diagnosis, just basic tools and attentiveness. In this article, we will look in detail at how to find this unit, remove it and understand whether it can be repaired or requires complete replacement.

Do not panic if the unit stops turning on fully. Often, owners call a technician without even suspecting that the reason lies in a burnt contact or a jammed core, the cost of which is incommensurate with the cost of calling a specialist. Let's figure out how this system works and where to look for the culprit of the breakdown.

The role of the start-up relay in the operation of the compressor

Start-protective relay is an electromechanical switch that supplies voltage to the starting winding of the compressor motor only at the moment of startup. As soon as the motor reaches the required speed, the device automatically opens the starting winding circuit, leaving only the main winding to work. At the same time, it functions as a thermal fuse, opening the circuit when the current increases critically.

In refrigerators Biryusa relays of the RT series or R-1, R-2, R-3, R-4 are most often used. These devices operate on the principle of electromagnetic attraction or heating of a bimetallic plate. Electromagnetic relay triggers instantly when there is a current surge, closing the starting circuit, and the thermal relay reacts to prolonged overload, opening contacts to protect the engine from combustion.

If this element fails, the compressor either does not start at all, making only quiet clicks, or it hums for several seconds and turns off due to overheating. It is important to understand that relay failure is often a consequence of other problems, such as turn-to-turn shorts in the windings or problems with the capacitor. Therefore, simply replacing a part may not solve the problem completely if the root cause of the overload has not been eliminated.

For two-chamber models, stable refrigerant pressure is especially important, and any malfunctions in the operation of the motor are immediately reflected in the temperature in the chambers. Thermal protection in this case, it works more often, trying to save an expensive compressor from final failure. Ignoring the first symptoms may lead to the need to replace the entire unit, which is less economically profitable.

The exact location of the relay in two-chamber models

To find the relay, you do not need to disassemble the entire refrigerator. In the vast majority of two-chamber models Turk this element is located in the lower rear part of the housing, directly on the compressor casing. The compressor is a black metal "tank" that has copper tubing and electrical wires attached to it.

On the side of the compressor (usually on the left or right when looking at the rear) you will see a plastic or metal box that has a wiring harness that fits into it. It is inside this casing or attached to it from the outside that what you are looking for is located. In some older models, it can be attached directly to the three pins coming out of the compressor, without an additional protective cover. starting relay. In some older models, it may be attached directly to the three pins coming out of the compressor, without the need for an additional protective cover.

To access the part you must:

• 🔌 Disconnect the refrigerator from the electrical network (this is a mandatory safety condition).
• 🔧 Move the unit away from the wall to provide access to the rear wall.
• 🔩 Remove the protective cardboard or metal panel if it covers the engine compartment (found in new models).

Sometimes the relay is covered with an additional plastic cap, which must be carefully pryed off with a screwdriver. Do not use excessive force, as the plastic becomes brittle over time. Contact group may be hidden inside this casing, and your task is to get to it without damaging the suitable wires.

⚠️ Attention: Before starting any work, make sure that the power cord is removed from sockets A voltage of 220 volts is dangerous to life, and the capacitors in the circuit can retain a charge for some time after being disconnected.

Instructions for dismantling and visual inspection

After you have reached the engine compartment and located the plastic box on the compressor, you need to remove the relay for inspection. In models Biryusa fastening is usually carried out using latches or screws. If you see screws, use the appropriate screwdriver; if there are latches, carefully press them out with a flat tool.

Remove the device from the three contact pins of the compressor. It should be removed by hand, without jerking. If the relay is very tight, you can wiggle it slightly from side to side, but be careful not to damage the ceramic base or plastic elements. After removal, carefully inspect the case for melting, cracks or traces of burning.

What needs to be checked first:

• 👁️ Condition of internal contacts: they should not be blackened or oxidized.
• 👂 Presence of foreign objects: there should be no loose parts or shavings.
• 👃 Smell: the presence of a smell of burnt plastic or insulation indicates a breakdown.

If the relay body is transparent or translucent, you can see the internal structure. In electromagnetic relays a coil and a movable core are visible. It should move freely inside the coil. If the core is jammed or covered with oxides, this will lead to sticking of the contacts and the inability to start the engine.

Methods for checking the serviceability of a part

Appearance does not always give the full picture. Even if the relay appears intact, it may not perform its function. The most reliable way to check is to use a multimeter in resistance (Ohm) measurement mode. Before testing, make sure that the device is completely disconnected from the wires and the compressor.

Take the multimeter probes and apply them to the contacts that close in the operating position. For different types of relays, the wiring diagram may differ, but the general principle is this: the resistance between the contacts of the main winding should be close to zero (if the contacts are closed in a cold state) or infinity. The resistance of the starting relay coil is usually several tens of Ohms.

There is a simple but risky method of checking “by ear” and at work:

• 🔊 Connect the relay to the compressor without a casing and turn on the refrigerator.
• 🔊 If the device is working properly, you will hear a clear switch-on click 1-3 seconds after start.
• 🔊 If there is no click, or it occurs constantly at intervals of several seconds, the relay is faulty.

Thermal relay checked by heating. When current is passed through the bimetallic strip, it should heat up and bend, breaking the circuit. At home, it is difficult to check this without a special stand, so they often rely on indirect signs: if the compressor is hot and the refrigerator is cold, most likely the thermal protection does not work or, on the contrary, works instantly.

Is it possible to check the relay without a multimeter?

Theoretically, it is possible by connecting a known-good relay from another refrigerator (with similar characteristics). If the refrigerator starts working with the new relay, it means the old one is faulty. However, this method requires the presence of a spare part and carries risks if the cause of the breakdown is not in the relay, but in the compressor itself - you can burn a working part.

Compatibility table and relay types for Biryusa

When looking for a replacement, it is important to choose an analogue with identical characteristics. Refrigerators Biryusa equipped with different types of compressors (often domestic or Chinese analogues), therefore the relays may differ. Below is a table to help you navigate the markings.

Please note that for older models start relay often has a directional installation. The body may have an arrow or the inscription “UP” (up). If you install such a relay upside down, the core will not be able to rise under the influence of gravity and the magnetic field, and startup will not occur. Always check the orientation when installing.

Modern dual-chamber models with the system No Frost may use more complex electronic start modules. In such cases, a classic mechanical relay may be absent, and its functions are performed by a control board. Replacing such elements requires professional diagnostics and soldering.

⚠️ Attention: The characteristics of compressors in different batches of refrigerators may differ. Always check the markings on the nameplate of the compressor itself and on the body of the old relay before purchasing a new one. Do not rely only on the model of the refrigerator.

Replacing the relay: step-by-step algorithm of actions

If the diagnostics confirmed the malfunction, proceed with the replacement. Buy a similar part from a specialized store of spare parts for household appliances. Make sure that the new starting relay has the same current and voltage parameters as the original.

The replacement process is as follows:

1. Remove the old relay, remembering or photographing the order in which the wires are connected (if they go through block).
2. Clean the contact pins of the compressor from oxides with fine sandpaper, if necessary.
3. Install the new relay on the pins, observing the correct orientation (arrow up, if indicated).
4. Connect the wires to the terminals, clamping tightly them.
5. Fasten the relay housing in its normal position.

After assembly, do not rush to close the back panel. Plug in the refrigerator and listen. The compressor should start with a characteristic hum, after a few seconds click (disconnect the starting winding) and run smoothly. If the humming continues and after 5-10 seconds a shutdown click is heard, the relay may not fit or the problem is deeper (for example, the compressor itself is jammed).

For two-chamber models, it is important that the cooling process begins after startup. Check operation after 15-20 minutes: the evaporator in the freezer should begin to cool. If this does not happen, check whether the wires are mixed up or whether the new part is defective.

Common mistakes and prevention of breakdowns

One ​​of the common mistakes is installing a relay without eliminating the cause of its combustion. If the compressor has an interturn short circuit, it will consume increased current, which will lead to rapid failure of even a new one. Therefore, if a new relay burns out within a few days, diagnostics of the motor is necessary. thermal relay. Therefore, if a new relay burns out within a few days, motor diagnostics are necessary.

Another mistake is ignoring cleanliness in the engine compartment. Dust, animal hair and cobwebs, accumulating on the compressor and relay, impair heat dissipation. Overheating accelerates the aging of insulation and the deformation of bimetallic plates. Regular cleaning of the back wall of the refrigerator (every six months) prolongs the life of the components.

Also, users often forget about ventilation. If the refrigerator is located close to the wall or in a niche without gaps, the compressor operates in high load mode. This leads to frequent protection operations and wear of the starting equipment. Observe the recommended distances from the walls specified in the instructions for Biryusa.

Do not try to repair a burnt out relay by stripping the contacts or bending the plates. This is a temporary measure that may lead to a fire or permanent failure of the compressor. The cost of a new relay is low, and the risk does not justify the savings.

Is it possible to use a relay from another refrigerator, for example, Atlant or Indesit?

The use of analogues is possible, but only if the electrical characteristics match (operation current, voltage, compressor type). Relays from Atlanta are often suitable for Biryusaas similar compressors were used. However, it is better to look for the original or a complete analogue by catalog number.

Why does the relay click, but the refrigerator does not turn on?

This is a classic sign of a malfunction. A click means that the thermal protection is triggered due to an overload, or the starting relay is trying to start the motor, but cannot (the compressor is jammed or the winding is burned out). Also, the reason may be low voltage in the network.

How much does it cost to replace a relay in a service center?

The cost consists of the price of the part and the work of the technician. The part is inexpensive, but a specialist visit and diagnostics can account for a significant portion of the cost. Self-replacement saves the budget, but requires caution.

How often do you need to change the relay in the Biryusa refrigerator?

Under normal operating conditions and stable voltage in the network, the relay lasts for years, often the entire service life of the compressor. Frequent replacements (once a year or more often) indicate problems with the electrical network or the motor itself.