Refrigerator relay "Biryusa": appearance, location and fault diagnosis

The relay in the refrigerator Biryusa is a small but critical element that is responsible for starting the compressor and protecting it from overloads. If the refrigerator suddenly stops freezing, makes strange clicking noises, or does not turn on at all, the relay may be to blame. However, many users do not know what it looks like, where it is located, or how to check it. This article will help you understand all the nuances - from the appearance of the relay to step-by-step diagnostics.

Depending on the model Biryusa (for example, Biryusa 18K, Biryusa 22 or Biryusa 6C) the relay may differ in shape, color and method of attachment. In old Soviet refrigerators, type relays were often installed, while in modern models - more compact ones were installed. We will consider all options so that you can accurately identify the part in your device. RTK-X, and in modern models - more compact RT-3 or DANFOSS. We will consider all options so that you can accurately identify the part in your device.

What the relay looks like in the Biryusa refrigerator: photo and description

The relay for starting and protecting the compressor in refrigerators Biryusa usually is a plastic or metal box the size of a pack of cigarettes. It is easy to recognize by its characteristic features:

• 🔌 Connector for connecting to the compressor —usually three contacts (common, starting and working).
• 🔧 Attachment to the compressor housing —can be on latches, screws, or simply put on tubes.
• 📏 Dimensions —from 5×5 cm (modern models) to 8×6 cm (old refrigerators).
• 🎨 Color —most often black, gray or white, less often - green or blue.

The relay body is usually marked, for example:

• RTK-X — for older models (Biryusa-3, Biryusa-6).
• RT-3 or RT-4 —for refrigerators of the 1990–2000s.
• DANFOSS 103N0240 or similar—in modern Biryusa with inverter compressors.

Below are photos of different types of relays so that you can compare with the part in your refrigerator:

Photo of a relay for Biryusa refrigerators

1. Relay RTK-X (old models): Rectangular metal case with a round hole for attachment to the compressor. Often found in refrigerators manufactured before 1995. 2. Relay RT-3 (1990–2010s): Plastic box with three contacts and a latch for fixing to the compressor. Can be black or gray. 3. Relay DANFOSS (modern models): data-i="94">If there are traces of melting, blackening or cracks on the relay body, this is a clear sign of a malfunction. It is also worth paying attention to Compact, with a transparent lid for visual inspection. contacts. Suitable for inverter compressors.

Important! If there are traces of melting, blackening or cracks on the relay body, this is a clear sign of a malfunction. It is also worth paying attention to the characteristic burning smellwhich may come from a burnt-out winding.

Where is the relay in the Biryusa refrigerator?

The start and protection relay is always located next to the compressor - the main “heart” of the refrigerator. To find it:

1. Unplug the refrigerator.
2. Remove the back cover (in most models Biryusa it is secured with 4-6 screws).
3. The compressor is a black metal tank with tubes. The relay is attached to it on the side or on top.

Depending on the model, the location may differ slightly:

In some models (for example, Biryusa 6C) the relay can be hidden under a layer of thermal insulation. If you do not see it right away, carefully bend the insulation so as not to damage the tubes.

Signs of a relay malfunction: when is it time to check it?

The relay is one of the most vulnerable parts in refrigerator Biryusa. Its malfunction can be determined by the following symptoms:

• ⚡ The refrigerator does not turn on —the compressor is silent, the light inside is on.
• 🔊 Clicks without starting —the relay is trying to turn on compressor, but it does not start.
• ❄️ The upper/lower chamber does not freeze —the compressor is working, but not at full power.
• 🔥 Compressor overheating —the compressor body is hot, the relay turns it off after 5–10 seconds.
• 💡 The malfunction indicator is flashing (in modern models with electronic control).

If the refrigerator makes noise single click when you try to turn it on, but the compressor does not start, this is almost always the fault relay. In 80% of cases, the problem is solved by replacing it.

However, similar symptoms can occur with other malfunctions:

• Problems with the thermostat.
• Freon leak.
• Compressor malfunction.

To accurately diagnose a breakdown, you need to check the relay with a multimeter.

How to check the Biryusa refrigerator relay with a multimeter?

For diagnostics relay, you will need a multimeter (or tester) and a screwdriver. Follow the step-by-step instructions:

Disconnect the refrigerator from the network

Remove the back cover

Find the relay on the compressor

Disconnect the wires (remember them location)

Remove the relay from the compressor-->

Step 1. Checking the winding resistance

Set the multimeter to resistance measurement mode (200 Ohm) Connect the probes to the relay contacts:

• Between common (C) and starting (S) contact the resistance should be 15–40 Ohm.
• Between total (C) and working (R) — 10–30 Ohm.
• Between starter (S) and worker (R) — infinity (break).

Step 2. Functional check

If the resistance is normal, connect the relay back to the compressor (without reinstalling it) and apply power. In this case:

• ✅ Good relay — the compressor will start with a slight click.
• ❌ Faulty relay —a click will be heard, but the compressor will not turn on, or the relay will start to “chirp.”

Step 3. Visual inspection

Inspect the relay body for:

• 🔥 Blackening or melting of the plastic.
• 💧 Traces of moisture (may indicate a freon leak or condensation).
• 🔌 Oxidation of contacts (clean with alcohol or sandpaper).

What to do if the relay clicks, but the compressor does not start?

This may mean:

1. Interturn short circuit in the compressor winding —the compressor needs to be replaced.

2. Jagging compressor —try to manually turn the shaft (this cannot be done through a relay, you need access to the compressor).

3. Thermostat malfunction —check it separately.

How to replace the relay on the Biryusa refrigerator with your own hands?

If diagnostics showed that the relay is faulty, you can replace it yourself. To do this:

1. Buy a new relay compatible with your compressor model. There should be a marking on the body of the old relay (for example, RT-3-13 or DANFOSS 103N0240).
2. Unplug the refrigerator and remove the back cover.
3. Disconnect the wires from the relay (it is better to take a photo of the connection diagram).
4. Remove the old relay from the compressor (a screwdriver or pliers may be required).
5. Install a new relay, connect the wires in the same order.
6. Start the refrigerator and check work.

Important nuances:

• 🔌 If the wires are connected incorrectly, the compressor may burn out.
• 🔧 In some models Biryusa the relay is mounted on rivets - they need to be carefully drilled out.
• 📋 If you are not sure about the relay model, take the old one with you to the store for comparison.

The cost of a new relay for Biryusa:

• RTK-X — 300–600 RUR the compressor does not start, check
• RT-3 — 500–1200 rubles.
• DANFOSS — 1000–2500 rubles.

Common mistakes when replacing a relay and how to avoid them

Many users make mistakes that lead to repeated failure or failure of the compressor. Let's consider the most common ones:

⚠️ Attention! Never connect the compressor directly to the network without a relay - this will lead to its instant combustion. The relay not only starts the motor, but also protects it from overheating.

• ❌ Wrong connection of wires - if confuse starting (S) and working (R) contacts, the compressor will not start or will not work correctly.
• ❌ Using an incompatible relay —even if it looks similar, the parameters may not be suitable. Always check the markings.
• ❌ Ignoring the compressor test —if the compressor is stuck or has an interturn short circuit, the new relay will quickly burn out.
• ❌ Operation under voltage —before replacing, be sure to unplug the refrigerator from the outlet.

If after replacing the relay the refrigerator is unstable (it often turns off, does not gain temperature), check:

• 🔌 Contact quality — oxidized or loose wires can cause failures.
• 🌡️ Thermoregulator —if it is faulty, the relay will receive incorrect signals.
• ⚡ Network voltage —at low voltage (less than 200V) the compressor may not start.

Where to buy a relay for a refrigerator. Biryusa?

You can purchase a relay in several ways:

When purchasing, pay attention to:

• 📋 Marking —must completely match the old relay.
• 🔧 Compressor type —different relays are used for inverter and conventional compressors.
• 📦 Completeness —some relays are sold with fasteners, some are not.

⚠️ Attention! On AliExpress and similar sites they often sell universal relays without markings. They may not be suitable for your model BiryusaAlways check compatibility with the seller.

FAQ: Frequently asked questions about the Biryusa refrigerator relay

Is it possible to repair the relay or just replace it?

In most cases, the relay cannot be repaired, since it is a sealed block with contacts and a bimetallic plate. An exception is cleaning oxidized contacts or replacing a burnt resistor (if the relay is removable). However, such repairs are unreliable and can lead to repeated failure.

How to determine that the relay has burned out and not the compressor?

If the relay clicks, but the compressor does not start, turn off the relay and apply voltage. directly to the compressor (for a short time!). If the compressor works, the relay is to blame. If not, the problem is in the compressor or the starting capacitor. Attention: this test requires experience, it is better to entrust it to a specialist.

How long does the relay last in the refrigerator? Biryusa?

The service life of the relay depends on the operating conditions. On average:

• Old models (Biryusa 3, 6, 18) - 10–15 years.
• Modern refrigerators - 5–10 years.

The wear of the relay is affected by voltage surges, frequent switching on/off of the refrigerator and high humidity.

Is it possible to use a relay from another refrigerator?

Theoretically, it is possible, but only if:

• The relay markings are completely the same.
• The type of compressor is identical (piston/inverter).
• The rated voltage and current are the same.

Otherwise the relay will either not work or will not work quickly will burn out.

What to do if, after replacing the relay, the refrigerator works, but does not freeze?

The reasons may be the following:

• Faulty thermostat - check it with a multimeter.
• Leakage freon —refilling required.
• Clogged capillary tube —needs cleaning.
• Wrongly connected relay wires —check the diagram.

If you are not sure of the reason, it is better to call a technician.