An unexpected stop of the compressor is a situation that can take any refrigerator owner by surprise Biryusa. The device stops cooling, the temperature inside rises, and the food begins to spoil. Often the cause of such a breakdown is the failure of the start-up relay, which is responsible for starting the engine and protecting it from overloads.
In most cases, replacing this small but important element allows you to return the equipment to life without an expensive visit from a technician. Carrying out repairs yourself requires accuracy, a minimum set of tools and an understanding of the electrical circuit. Safety When working with electrical appliances comes first, so it is absolutely impossible to ignore the rules for handling current.
In this article we will look in detail at how to correctly diagnose the problem, select the appropriate part and dismantle the old one relays on various models of refrigerators Biryusa. You will learn what nuances to pay attention to in order not to damage the compressor and successfully complete the repair.
Diagnostics of a malfunction of the starting relay
Before starting disassembly, you need to make sure that the problem lies in the relay. The refrigerator may not work for many reasons: from a burned out compressor to a freon leak. However, there are specific signs that indicate a malfunction of the start-up protection device.
One of the main symptoms is a characteristic click when trying to start the engine, after which the compressor hums for a couple of seconds and goes silent. If after some time (usually 15-20 minutes) the cycle repeats, this is a sure sign that the starting winding is not turning on. In some cases, the relay may “stick” or, conversely, not give a signal to start at all.
For accurate diagnosis, it is worth carrying out a visual inspection and a simple check:
- 🔊 Sound signals: listen to the operation of the unit - repeated clicks at intervals of 10-20 minutes indicate the operation of the thermal release.
- 🔥 Housing heating: if after an attempt to start the relay body becomes very hot, this indicates a short circuit or jammed contacts.
- 👃 Burning smell: the appearance of a smell of burning plastic or insulation in the compressor area often indicates burnout of the windings inside the relay.
However, in 80% of cases with the described symptoms, the culprit is the starting protection device.
Preparation of tools and safety measures
Working with electrical equipment requires strict precautions. Any manipulations with the internal components of the refrigerator Biryusa should be carried out only after the device is completely disconnected from the power supply. This is basic rulethe violation of which can lead to electric shock.
To dismantle the relay you will need a minimum set of tools that can be found in every home. No need to buy expensive equipment or special keys. It is enough to have a standard screwdriver and possibly pliers on hand for easy work with wires.
List of required equipment:
- 🔧 Screwdriver: Phillips or flat (depending on the type of screws on the compressor casing).
- ✂️ Pliers: will be needed for neat removing the terminals from the contacts if they are tightly seated.
- 🧤 Protective gloves: it is recommended to use dielectric or regular work gloves to avoid getting your hands dirty with oil and not getting hurt on metal edges.
It is also recommended to prepare a clean rag to wipe the contacts and possibly contact spray to clean oxidized connections before installing the new part. If you plan to check the removed relay with a multimeter, prepare the device in advance and make sure its battery is in good condition.
☑️ Preparation for repair
Access to the compressor and removal of the protective casing
Start relay in refrigerators Biryusa located directly on the compressor housing, at the lower rear of the unit. To get to it, you need to remove the rear metal panel that covers the engine compartment. In some older models, access can be opened immediately, but most often the cover must be removed.
The process of removing the casing usually does not cause difficulties. The panel is attached with several screws around the perimeter or fixed with latches. Be careful, the edges of the metal sheet may be sharp, so wear gloves. After unscrewing the screws, carefully remove the panel and set it aside.
⚠️ Attention: Before removing the casing, make sure that the refrigerator has been left unplugged for at least 10-15 minutes. The capacitors in the control system could retain a charge, and the compressor must cool down so as not to get burned if accidentally touched.
After removing the panel, you will see a black cylindrical or pear-shaped compressor tank. A bundle of wires, covered with a plastic box, approaches it from the side or below. It is inside this box or directly at the compressor terminals that the required relay is located. In models Biryusa of the old model, the relay can be mounted on a frame, and in new ones it can be placed directly on the contacts.
Sometimes access is difficult due to accumulated dust or cobwebs. Carefully clean the area around the compressor with a dry cloth or soft brush so that you can see all connections and markings.
Step-by-step instructions for removing the relay
The process of removing the relay itself depends on the type of device installed. In refrigerators Biryusa most often there are two types of fastenings: on the base frame or direct fit on the compressor contacts. You can determine the type visually without any effort.
If the relay is installed on a frame, you first need to disconnect the wires going to the contacts. They can be fixed with screws or simply sit tightly on the terminals. Use pliers to carefully, without jerking, tighten the terminals. Important Remember or photograph the connection diagram so that when installing a new element you do not mix up the wires.
Algorithm of actions for dismantling:
- 📸 Fixation: take a photo of connecting the wires before disconnecting them.
- 🔌 Disconnection: remove the terminals from the relay contacts, slightly rocking them from side to side.
- 🔩 Removing the fastening: if the relay is held on screws or frame latches, unscrew them or carefully press out the clamps.
- 👐 Removal: remove the relay from the compressor terminals. If it sits tightly, you can wiggle it slightly, but avoid sudden movements so as not to damage the copper tubes of the compressor.
If the relay is simply put on the three pins of the compressor (RTP or RT type), it is removed by moving downwards or sideways after disconnecting the wires. The main thing is not to make excessive efforts. If the part does not fit, check whether you forgot to remove the fixing bracket or screw.
What to do if the relay is stuck?
If the relay sits tightly on the compressor contacts and cannot be removed by hand, do not use force. Gently heat the plastic case with a hairdryer (not open flame!) for 10-15 seconds. The plastic will expand, making it easier to remove the part. You can also use a thin screwdriver to slightly pry the housing at the base, but be careful not to damage the compressor leads.
Types of relays in Biryusa refrigerators and their features
Refrigerators Biryusa equipped with various modifications of start-up protection devices in different years of production. Understanding the differences between them will help you choose the right replacement. The main division occurs into induction (electromagnetic) and posistor (thermal) relays.
Induction relays, such as the series RTP or RTK, have a coil and a movable core inside. They are noisier in operation and sensitive to installation position. PTC relays (for example, RT-1, RT-2) operate silently, have no moving parts and are considered more reliable, but are critical to the cooling time before restarting.
Comparative table of main characteristics:
| Relay type | Operation principle | Noise | Service life |
|---|---|---|---|
| Induction (RTP, RTK) | Electromagnetic retraction | A click is heard | Medium |
| Posistor (RT-1, RT-2) | Semiconductor heating | Silent | High |
| Combined | Combination of systems | Moderate | High |
| Electronic (rarely) | Microcircuits | Silent | Very high |
When selecting an analogue, pay attention not only on (model), but also on the compressor power indicated on the nameplate. Installing a relay with inappropriate parameters can lead to rapid combustion of the new part or damage to the motor windings.
Checking the removed device and choosing a replacement
After the relay has been removed, you can check it for serviceability if you have a multimeter. This will allow you to accurately verify the cause of the breakdown and not change the working part. To check, it is necessary to “ring” the contacts in a cold state.
For posistor relays, the resistance between the main contacts should be within normal limits (usually several tens of Ohms), and some time after applying voltage (or heating) it should go to infinity. For induction relays, the integrity of the coil and the mobility of the core are checked. If the coil rings short or is broken, the part is faulty.
When choosing a new spare part, be guided by the following criteria:
- 🏷️ Marking: look for an exact match or its direct analogues (sellers have correspondence tables).
- ⚡ Power: make sure that the relay is rated for the power of your compressor (indicated in W or HP on the sticker).
- 🔌 Geometry: the shape of the case and the location of the terminals must match, otherwise you will not be able to attach the part to the compressor.
It is not recommended to use “universal” Chinese relays of dubious quality, since their protective functions may not work at a critical moment, which will lead to the burning of an expensive compressor. It is better to purchase an original spare part or a high-quality analogue from a trusted manufacturer.
Frequent errors during replacement and troubleshooting
Even a simple operation to replace the relay can be performed with errors that will lead to repeated failure. One of the most common problems is the relay being installed incorrectly. Many models, especially induction ones, are sensitive to the “top-bottom” position and work only in a vertical position.
Also, owners often forget to check the condition of the contacts on the compressor itself. Oxidized or burnt leads can cause poor contact, sparking, and rapid failure of the new relay. Before installation, be sure to clean the contacts with fine sandpaper or a file.
⚠️ Attention: Do not attempt to repair a burnt-out relay by disassembling and cleaning the contacts. The internal posistor or coil degrades over time, and such a “repair” will only give a temporary effect, after which the breakdown will recur, possibly with more serious consequences.
If, after replacing the relay, the refrigerator turned on, worked for 5-10 minutes and turned off again, check the temperature of the compressor housing. Excessive heating may indicate problems with the cooling system (clogged capillary, freon leak), and not an electrical fault. In this case, the relay worked correctly, protecting the motor from overheating.
Another mistake is ignoring the wiring condition. If the insulation of the wires is melted or cracked, they must be replaced or carefully insulated. Using low-quality electrical tape near a hot compressor is unacceptable.
Why does it hum, but does not start after replacement?
If the situation has not changed after installing a new relay, there are three possible reasons: 1) The compressor itself is faulty (interturn short circuit or wedge). 2) The thermostat or defrost sensor is faulty (does not give a command to turn on). 3) There is a problem with the wiring or plug. A more in-depth diagnostic is required with measuring current consumption.
Is it possible to start a Biryusa refrigerator without a relay?
Theoretically, you can start the compressor by applying voltage directly to the starting winding, but doing this is strictly not recommended for long-term operation. Without a start relay, the compressor will not be able to start normally under load, and without a protective element it will burn out if overheated or due to a power surge. This is only possible for a short-term check of the motor's performance.
Where can you find the relay markings on the Biryusa refrigerator?
The markings are usually applied to the plastic body of the relay itself. To see it, it is not necessary to completely remove the part; just carefully remove the protective cover in the engine compartment. Also, information about the type of relay required is often duplicated in the technical documentation or on a sticker on the back wall of the refrigerator.
How much does it cost to replace a relay by a technician?
The cost consists of the price of the spare part itself (from 500 to 1500 rubles depending on the model) and the cost of the technician’s work (usually from 1000 to 2000 rubles). Replacing yourself allows you to save on labor costs, since the process takes no more than 20-30 minutes.
Why does a new relay burn out after a week?
A common reason is unstable voltage in the network or a malfunction of the compressor itself (difficult start-up). It is also possible that a relay with inappropriate power parameters is installed. If the compressor is old and worn out, the starting currents may be higher than normal, which leads to overload and destruction of the contacts of the new relay.
Is it necessary to defrost the refrigerator before replacing?
It is not necessary to specifically defrost the unit to replace the relay if access to the compressor is open. However, if the refrigerator is severely frozen and you plan to carry out work for a long time, it is recommended to defrost and dry it so that moisture does not get on the electrical contacts during repairs.