A sudden stop of the compressor or failure of the refrigerator Atlant to turn on is always a stressful situation that requires immediate clarification of the reasons. Most often, the problem lies in the failure of the start-up relay, which is responsible for starting the engine and protecting it from overloads. Replacing this part is one of the most common procedures in the repair of household appliances, which you can do yourself if you have basic tools.
You do not have to call a technician for diagnostics if you have minimal skills in handling electrical equipment and understand the principle of operation of refrigeration equipment. Correct removal and installation of a new component will restore the operation of the unit in the shortest possible time. It is only important to observe safety precautions and strictly follow the algorithm of actions so as not to damage other components of the system.
Before starting disassembly, you need to prepare the workplace and make sure that the refrigerator is completely disconnected from the power supply. Any manipulations with electrical wiring and the compressor require absolute confidence that there is no voltage. In this article we will analyze in detail the process of dismantling the relay, checking and replacing it, paying attention to the nuances of various models Atlant.
Diagnostics of a malfunction of the starting relay
The first sign that starting relay has failed is the characteristic clicking sound when trying to start the refrigerator. The compressor tries to start, a loud click is heard, but the engine does not pick up speed and turns off after a few seconds. This symptom is often called “clicking”, and it indicates that the starting mechanism cannot close the circuit of the motor winding.
Another indicator of the problem may be the complete absence of sound from the motor when the refrigerator is plugged in. If the light inside the chamber is on, but the compressor is silent, this may indicate an open circuit in the relay or burnt contacts. Sometimes the relay body may have visual signs of overheating, such as blackening of the plastic or melting of the terminals.
For an accurate diagnosis, it is often necessary to test the contacts with a multimeter, but an initial inspection can provide a lot of information. If you hear a burning smell coming from the motor-compressor or see soot on the parts, this is a sure sign of an electrical breakdown.
⚠️ Attention: If after replacing the relay the refrigerator stops working again or the compressor hums but does not start, the motor-compressor itself may be faulty or the system's tightness may be compromised. In this case, self-repair can be dangerous.
It is important to distinguish between symptoms of a relay malfunction and problems with the thermostat. If the compressor makes no noise at all and does not try to start, check the thermostat circuit first. However, if the startup occurs, but immediately fails, the focus of attention shifts precisely to the trigger mechanism.
Necessary tools and preparation
To successfully complete the work of replacing the relay, you will need a minimum set of tools that any DIYer can find in his home. The main tool will be a screwdriver, preferably with a flat slot, since many clamps and fasteners in older models Atlant have exactly this design. You may also need a Phillips screwdriver to remove the protective panels.
It would be a good idea to have pliers or pliers that will help you carefully remove the fixing brackets or terminals if they are too tight. To check the functionality of a removed part or a new part, be sure to use a multimeter or tester. Without this device, diagnostics will be only speculative.
Prepare a clean rag and possibly a solvent to clean the contacts from oxidation and carbon deposits if you plan to check the old relay. The work place should be well lit, since the compressor area is often located in a darkened space behind the refrigerator.
List of necessary tools:
- 🔧 Flat and Phillips screwdriver (for dismantling the casing)
- 🔌 Pliers or pliers (for working with terminals). Electrical safety is priority number one. If you are using an extension cord, check its integrity to avoid accidental electric shock during operation.
- 📟 Multimeter (to check circuit continuity)
- 🧤 Dielectric gloves (for safety)
- 🔦 Flashlight (to illuminate the back wall)
Before starting work, make sure the floor is dry and your hands are not wet. Electrical safety is priority number one. If you are using an extension cord, check its integrity to avoid accidental electric shock during operation.
Procedure for accessing the compressor
Two-chamber refrigerators Atlant are designed so that the compressor group is located in the lower rear part of the unit. To access it, you need to move the refrigerator away from the wall, providing free access to the rear panel. Be careful not to damage the floor covering or pinch the tubes when moving equipment.
On the back wall you will see a metal or plastic cover covering the motor-compressor. It is usually secured with four bolts or latches. On some models, access is through the bottom panel, which may be removable. Carefully unscrew the fasteners and remove the casing, opening access to the “heart” of the refrigerator.
Inside you will see a black cylindrical or pear-shaped object - this is the compressor. There is a plastic box installed on the side or top of it, to which the wires fit. This is what we are looking for starting relay. It is with this that we will work first.
Before touching the parts, visually inspect the condition of the wiring again. If the wires are melted or the insulation is broken, a simple relay may not be enough - the wiring will need to be restored. Also pay attention to the condenser tubes: they should not have traces of oil, which could indicate a freon leak.
☑️ Preparation for removing the relay
Technology for removing the relay from the compressor
The process of dismantling the relay depends on its type and method of attachment, but the general the algorithm is the same for most models Atlant. The relay is usually placed directly on the three pins of the compressor and secured with a metal bracket. This bar prevents the part from jumping off during vibration.
To remove the relay, you must first carefully disconnect the terminal block with wires. It can be removed by hand or require pressing out the plastic clips. Do not pull on the wires themselves, hold on to the body of the block so as not to break the wires at the base.
Next, you should remove the fixing bracket. It can be spring or screw. If the bracket is spring-loaded, you need to slightly press it with a screwdriver and move it down or to the side. After being released from the bracket, the relay is easily removed from the studs by moving upwards or by gently rocking from side to side.
Typical sequence of actions for removal:
- Remove the terminal block with the power wires.
- Press or unscrew the fixing metal strip.
- Carefully pull the relay up, removing it from the compressor studs.
- Inspect the studs for oxidation or carbon deposits.
Sometimes the relay can “stick” to the compressor due to high temperature or oxidation of the contacts. In this case, do not use excessive force or knock on parts. A slight rocking and gentle rotation around the axis will help to tear it out of place without damage.
Types of relays and their design features
In refrigerators Atlant there are different types of starting devices used, and it is important to understand their differences when replacing them. The most common are electromagnetic relays, which operate by creating a magnetic field in a coil when voltage is applied. They are typical for older models and produce a loud click when triggered.
More modern models are equipped with thermal or combined relays, as well as devices with a posistor. PTC relays are characterized by quiet operation and the absence of moving mechanical parts inside. They change their resistance when heated, opening the starting winding circuit.
When purchasing a new part, be sure to check the markings. Relays are selected strictly according to the compressor power and type of refrigerant. Installing an unsuitable relay can lead to instantaneous burnout of the motor windings or failure to start.
Comparative table of relay types:
| Relay type | Principle of operation | Characteristic features | Application |
|---|---|---|---|
| Electromagnetic | Retraction of the core by current | Loud click, presence of a coil | Old Atlant models |
| Thermal | Heating of the bimetallic plate | Inertia, protection against overheating | Combined systems |
| Posistor | Change in ceramic resistance | No moving parts, silence | Modern models |
| Combined | Combination of electromagnet and thermal protection | Two separate blocks in one housing | Universal use |
You can visually distinguish types by appearance and number of contacts. Electromagnetic ones often have a more massive body, while posistor ones are compact. If you are not sure about the type of your relay, it is better to remove it and take it with you to the store for comparison.
Installing a new relay and checking operation
Installing a new starting relay is done in the reverse order of removal. It is important to orient the part correctly: the body usually has a “UP” marking or an arrow indicating the top position. Incorrect orientation may result in incorrect operation or failure to start.
Place the relay onto the three compressor studs, making sure they are fully seated in their respective sockets. Then install the retaining bracket and snap the terminal block into place with the wires. Make sure that all connections are tight and do not loosen with slight tugging.
After installation, close the compressor protective casing, but do not screw it tightly yet to be able to observe. Plug in the refrigerator. It is normal for the compressor to start within the first 5-10 seconds. The engine should run smoothly, without humming or vibration.
⚠️ Attention: If, after turning on, the compressor hums for more than 3-5 seconds and does not start, immediately unplug the refrigerator from the outlet! This is a signal about incorrect installation of the relay or a malfunction of the motor itself.
Check the heating of the new relay housing after 15-20 minutes of operation. It may be warm, but it should not burn your hand or smell like burnt plastic. If all parameters are normal, you can finally secure the back cover and move the refrigerator to the wall.
What to do if the new relay clicks, but the refrigerator does not freeze?
If the relay clicks, the compressor is working, but there is no cold, the problem is not electrical. Most likely, there is a freon leak or a blockage in the capillary system. You need to call a technician to fill or clean the circuit.
Frequent replacement errors and precautions
One of the most common mistakes is ignoring the cleanliness of the contacts. When installing a new relay on oxidized compressor studs, the contact will be poor, which will lead to sparking and rapid failure of the new part. Always clean the contact groups before installation.
Another mistake is using a relay with inappropriate parameters. Trying to install a relay from another manufacturer or model without taking into account the characteristics of the compressor can end disastrously for the engine. Always rely on the original markings or complete technical analogues.
Do not forget about safety. Working with live electrical appliances is strictly prohibited. Even after unplugging from the outlet, a charge may remain in the capacitors, so let the equipment “stand” for a couple of minutes before starting work.
Basic safety rules:
- 🚫 Never work with a refrigerator plugged in.
- 🚫 Do not use damaged tools with broken insulation.
- 🚫 Do not touch the metal parts of the compressor with wet hands.
- 🚫 Do not leave the wires taut to avoid breakage.
If you feel unsure of your abilities or notice complex faults, it is better to stop and turn to professionals. Repairing a refrigerator Atlant requires precision, and a mistake can cost more than the services of a specialist.
Is it possible to restore an old relay, or do you just need a replacement?
Restoring an old electromagnetic relay is possible in rare cases, if the problem was only sticking contacts or contamination. However, given the low cost of new parts and the high probability of repeated failure, replacement is a more rational and reliable solution. For posistor relays, restoration is impossible.
Why does the relay burn out immediately after installation?
If a new relay burns out instantly, the reason is most likely not in the part itself. This may indicate an interturn short circuit in the compressor windings, power surges in the network, or a faulty refrigerator wiring. It is necessary to carry out in-depth diagnostics of the motor.
Where can I find the relay markings on the Atlant refrigerator?
The markings are applied directly to the plastic housing of the relay. To see it, it is not necessary to remove the part completely - often it is enough to remove the terminal block and move the relay a little. Also, information about the type of relay can be in the technical documentation or on the nameplate of the compressor itself.
How long does it take to replace a relay?
For an experienced technician, the process takes 15-20 minutes. When replacing yourself, taking into account the preparation of tools and caution, allow about 40-60 minutes. Most of the time is spent on providing access to the compressor and carefully dismantling the fasteners.