Owners of household appliances are often faced with a situation where the refrigerator stops cooling or starts making strange clicking sounds. In most cases, especially when it comes to models Biryusa, the problem lies in the failure of the start-up relay. This small but critical element is responsible for starting the compressor and protecting it from overloads. If you hear the hum of the motor, which abruptly ends with a click, or the unit does not turn on at all, there is a high probability that diagnostics of this particular unit is required.
Finding the place where it is located Biryusa refrigerator relaydoes not require deep engineering knowledge, but does imply compliance with safety regulations. The location of the element may vary slightly depending on the series and year of manufacture of the device, but the general principle of the layout remains the same for most models of the brand. Understanding the design will help you quickly find the fault and, if necessary, replace the part yourself, avoiding an expensive call to a technician.
Next we will analyze in detail the algorithm of actions, the necessary tools and nuances that are important to consider when working with electrical components of refrigeration equipment. Correct diagnostics will save time and budget, returning the equipment to working order in the shortest possible time.
The principle of operation of the start-up protection relay
To understand why starting relay it fails, it is necessary to briefly consider the mechanism of its action. Biryusa refrigerators, as a rule, use electromagnetic relays with or without a posistor. Their main task is to supply increased starting current to the compressor motor winding at the moment of switching on. As soon as the motor reaches the required speed, the relay opens the starting winding circuit, leaving only the main winding running.
In parallel with the starting function, the device acts as a protection. Inside the case there is a bimetallic plate that reacts to current strength. If for some reason the compressor jams or an overload occurs, the current increases, the plate heats up and opens the contacts, de-energizing the unit. It is this process that we hear as a characteristic click. Protective relay prevents the combustion of the motor windings, sacrificing itself in critical situations.
A frequent cause of breakdown is natural wear of the contacts or destruction of the posistor. Contacts can burn out from sparking with frequent switching on, and the posistor can lose its properties due to thermal cycles. As a result, the circuit does not close to start, or, conversely, does not open, which leads to a hum and subsequent shutdown of the compressor by the protection.
⚠️ Attention: If after the click the compressor hums, but does not start, do not try to turn on the refrigerator repeatedly in a row. This can lead to the final failure of the motor windings or an interturn short circuit.
The location of the relay in various Biryusa models
The answer to the question of where the relay is located depends on the design of the lower part of the refrigerator. In classic Biryusa models, such as the series 6, 8, 14 and more modern 133, 134, access to the compressor and attachments is through the rear panel. The compressor is usually located in a niche at the bottom of the rear wall of the unit.
The relay itself is placed directly on the compressor shank (three contact pins). It is a plastic box in black or white, which is attached to the motor body or fixed with a metal frame. In some modifications, to access it you need to remove the metal casing covering the compressor compartment, in others you just need to unscrew a couple of screws or remove the plastic cover.
It is important to note that in dual-compressor models the relays will be located on each motor separately. Their design may be identical, but physically they are on different sides or at different heights relative to each other. When replacing, always check the markings, as different types of starters may be used for the left and right compressors.
⚠️ Attention: The design and location of elements may vary depending on the year of manufacture. Before starting work, check the technical documentation of a specific model or visually evaluate the layout so as not to damage the tubes and wiring.
Tools for dismantling and diagnostics
Before you begin to remove the relay, you need to prepare a workbench and a set of tools. Working with electrical appliances requires care and proper equipment. You do not need complex professional tools, but a basic set of home craftsman is required.
First of all, ensure good lighting of the work area, since the compressor compartment is often dark. Prepare a multimeter in advance to check continuity and resistance. Without this device, diagnostics will be only speculative. You will also need screwdrivers (phillips and flathead) to remove the protective covers.
- 🛠️ A set of screwdrivers for removing the rear panel mounting screws and clamps.
- 🔌 Multimeter (tester) for testing contacts and checking the posistor.
- 🧤 Dielectric gloves for protection against residual current and sharp edges.
- 📸 Smartphone or camera to photograph the connection diagram before disassembly.
It is also worth mentioning the need to have isopropyl alcohol or contact spray on hand. They will be useful for cleaning contacts if you decide not to change the relay immediately, but only carry out preventive maintenance. However, if the element is burnt out, cleaning will no longer help - a complete replacement will be required.
☑️ Preparation for repair
Step-by-step instructions for removing the relay
The dismantling process begins with completely disconnecting the refrigerator from the power supply. This categorical requirement security. Even if the compressor is not running, voltage may remain in the circuit. After the cord is removed from the socket, let the unit stand for 10-15 minutes so that the capacitors discharge and the compressor cools down.
Move the refrigerator away from the wall, providing free access to the back. Remove the rear metal panel by unscrewing the mounting screws around the perimeter. In some Biryusa models, the panel can be held on by latches that need to be carefully pressed out. Find the compressor - this is a black “tank” with tubes coming out of it.
On the shank of the compressor you will see a plastic box - this is the relay you are looking for. It can be covered with an additional plastic casing or secured with a metal bracket. Carefully remove the fasteners. If the relay is simply put on the contacts, it should be removed with a slight rocking movement. Do not use excessive force to avoid breaking the plastic tabs or damaging the wires.
⚠️ Attention: Before disconnecting the wires, be sure to take a photo of their location. Reversed polarity or incorrect connection of the windings can instantly damage the new compressor or relay.
Diagnostics and serviceability check
After removing the device, you need to understand whether it can be repaired or requires replacement. A visual inspection often provides primary information: if a posistor ringing is heard inside the relay (as if a piece of ceramic has fallen off) or traces of burning and melting of plastic are visible, the diagnosis is obvious. However, for accuracy it is better to use a multimeter.
Switch the tester to resistance measurement mode (Ohm). Ring the relay contacts. In good condition, the resistance of the starting winding and the posistor circuit should be within certain limits (usually several tens of Ohms, the exact values depend on the model). If the device shows infinity (open) or zero (short circuit), the part is faulty. Also check the bimetallic plate - it should “ring” when cold.
There is a simple but risky test method without instruments: if you shake the relay and you hear a clear knock inside, it means the posistor has collapsed. This is a guaranteed sign that replacement is needed. Less experienced users are better off not relying on the “poke method”, but use measuring instruments to confirm the hypothesis.
Is it possible to temporarily start a refrigerator without a relay?
Theoretically, you can start the compressor by applying voltage directly to the starting winding through a button, but doing this is extremely dangerous without the skills. This may result in fire or electric shock. Use this method only for short-term diagnostics as a last resort.
Table of common faults
For the convenience of systematizing the problems faced by owners of Biryusa refrigerators, a summary table has been compiled. It will help compare symptoms with a probable cause and necessary actions.
| Symptom | Probable cause | Action | Complexity |
|---|---|---|---|
| Clicking, buzzing, shutdown | Faulty start relay | Replace relay | Low |
| No sound, no start | Open circuit or thermostat | Chain continuity, thermostat check | Average |
| Humming without a click | Compressor stuck | Checking the compressor, replacement possible | High |
| The relay gets hot during operation | Incorrect selection or wear | Replacement with an analogue with the correct parameters | Low |
| Frequent on/off | Problems with protection or thermostat | Diagnostics of thermostat and protection relay | Average |
As can be seen from the table, most problems associated with starting are solved by replacing inexpensive components. However, if the symptoms indicate a breakdown of the compressor itself (jamming), repairs become less economically feasible.
Selecting a replacement and installing a new relay
When purchasing a new relay, it is important to choose an exact analogue. Universal relays (so-called “tablets”) are not suitable for all Biryusa models, especially older series. Look for the markings that correspond to your device, for example RTK-X, R-3, R-4 or imported analogues like Danfoss. The following parameters are critically important: starting current and type of compressor (low-speed or high-speed).
Installation is carried out in the reverse order of removal. Push the relay onto the compressor contacts until it stops. Make sure it fits snugly and doesn't wobble. Connect the wires according to the photographs taken earlier. Secure the structure with a metal bracket or plastic clamp. Reinstall the protective casing and back panel.
After assembly, plug in the refrigerator. The first start-up may be accompanied by a louder sound than usual - this is normal, as the new posistor enters operating mode. After a few seconds, the hum should turn into a smooth hum of a working compressor, and after 10-15 minutes the freezer should start to get colder.
Frequently asked questions (FAQ)
Can it be repaired old relay if it burns out?
Theoretically, you can replace a burnt posistor or clean the contacts, but in practice this is a temporary measure. Industrial soldering and factory sealing are better. The cost of a new relay is low, so repairing the old one is often impractical and less reliable.
Why does a new relay burn out after a short time?
This may indicate problems with the compressor itself (turn-to-turn short circuit, increased current consumption) or incorrect selection of the relay (incorrect starting current). Also, the reason may be unstable voltage in the network.
Where to buy an original relay for Biryusa?
Original spare parts can be found in specialized stores of spare parts for household appliances, in Biryusa service centers or on large marketplaces, paying attention to the article number. Often high-quality analogues from well-known electronics manufacturers are suitable.
Is it dangerous to change the relay yourself?
If you strictly follow safety precautions (disconnect the device) and act carefully, the risk is minimal. The main danger is electric shock when the device is connected to the network or damage to the copper tubes of the compressor if the casing is removed carelessly.
How to understand that the relay is not at fault?
If after replacing the relay the compressor hums, but does not start, or does not make sounds at all (if the thermostat is working), the problem may be in the compressor itself or in the wiring. Testing the motor windings with a tester will help to find out.