How to start the compressor on an Atlant refrigerator: step-by-step instructions

Sudden stop refrigerator Atlant often becomes an unpleasant surprise, especially when food in the chamber begins to spoil. In most cases, the reason for the lack of cold is a failure or blockage of work compressor, which is the heart of the entire cooling system. Understanding how to correctly diagnose the problem and start the engine can save your products and budget from an expensive call to the repairman.

However, before taking active steps, it is necessary to clearly understand the risks associated with electricity and refrigerant. Applying voltage to the motor windings without installed thermal protection can lead to instant motor burnout or fire. This The article describes the technical aspects of the startup procedure, but requires the performer to have basic skills in working with power tools and a multimeter.

Belarusian-made refrigerators Atlant are famous for their reliability, but even they are subject to wear start-up relay or changes in winding characteristics over time. If you hear a hum, but the start does not occur, or the motor is completely silent, the algorithm of actions will vary. In this material we will analyze the mechanical and electrical aspects of restoring the unit's performance.

Diagnostics of the condition of the electric motor

The first step before any intervention in the electrical circuit should be a thorough diagnosis. Often, users mistakenly believe that the compressor is faulty, when the problem lies in a lack of power or a burnt-out thermostat. It is necessary to exclude external factors, such as a broken power cord or a faulty socket, before removing the back cover.

To check the motor itself, you will need multimeter. With its help, you need to ring the windings for breaks or short circuits. The normal resistance of the working winding is usually about 10-15 Ohms, and the starting winding is about 20-30 Ohms, although the exact values ​​​​depend on the specific model Atlant. If the device shows infinity or zero, the engine most likely requires replacement.

It is also important to visually inspect the compressor housing and suitable wires. The presence of burning marks, melted plastic or the characteristic smell of burnt insulation indicates a serious internal malfunction. In such cases, an attempt to start directly can be not only useless, but also dangerous.

• 🔌 Check the presence of voltage in the outlet using another electrical appliance.
• 🔍 Inspect the wires for mechanical damage and kinks.
• 📏 Measure the resistance of the windings with a multimeter to exclude interturn short circuit.
• 👂 Listen to the sounds: a quiet hum without starting indicates a jam or a problem with the relay.

If the diagnostics showed that the windings are intact, and power is supplied to the terminals, but the motor does not start, the problem lies in the trigger mechanism. It is the starting relay that is responsible for supplying an impulse to the starting winding, without which the rotor cannot gain the required speed.

Checking and replacing the starting relay

The most common reason for the inability to start a working compressor is failure start-up protection relay. Refrigerators Atlant use both posistor and induction relays. PTC models are more modern and reliable, but over time their resistance can change, which leads to the absence of a start pulse.

To check the relay, it must be carefully removed from the compressor contacts. Usually it is fixed on three contacts (two from the motor, one from the network) and is held in place by a tight fit or bracket. A visual inspection may reveal cracks in the housing or blackening of the insides, which is a clear sign of the need for replacement.

⚠️ Attention: When removing the relay, proceed carefully so as not to damage the thin copper contacts on the compressor pipes. Their restoration will require soldering and vacuuming of the system.

If there are no visual defects, you can try to check the operation of the posistor (if the relay is of this type) by applying voltage to it outside the refrigerator, but it is safer and easier to replace the element with a known good one. The cost of a new relay is low, and replacing it takes a few minutes.

Direct connection diagram of the compressor

In situations where it is necessary to check the performance of the motor, bypassing the standard automation (for example, for diagnostics or temporary start), a direct connection diagram is used. This method allows you to apply voltage directly to the working and starting windings, bypassing the thermostat and relay.

To implement this procedure, you will need a piece of wire with a plug, a button (or toggle switch) for briefly closing the starting winding circuit and insulating materials. It is important to strictly observe the color marking of the wires coming out of the compressor, since an error in the connection can lead to a hum without rotation of the rotor.

Connection diagram:
Phase (L) -> Working winding
Zero (N) -> Common winding
Phase (via a button) -> Starting winding (short-term)

The starting process looks like this: power is supplied to the working winding, then the starting winding circuit is closed for a split second through the button. The motor should work. If after releasing the button it continues to work, the launch is successful. If it stalls, the problem is deeper, perhaps an interturn short circuit or a wedge.

It is worth remembering that direct starting deprives the refrigerator of protection against overheating and voltage surges. This method can only be used briefly for diagnostics or as a temporary measure until new components are purchased.

Wire color marking table

One ​​of the main difficulties in self-repair is the correct identification of contacts. Manufacturers use standard color coding, but it may vary depending on the year of manufacture and the specific series Atlant. Below is a table to help you understand the pin assignments.

Based on these data, you can assemble the correct circuit for testing. However, it is always better to double-check the data in the technical documentation for a specific refrigerator model, since factory standards may change.

Possible causes of startup failure

Even with correct connection, the compressor may not start. There are a number of typical faults that block engine operation. Understanding the nature of these problems helps to avoid unnecessary spending on spare parts that will not solve the problem.

The so-called “wedge” of the compressor is often encountered. This is a mechanical failure in which the piston group gets stuck at a dead point. Attempts to wedge the motor by applying increased voltage or hitting the housing rarely give a long-term effect and often finish off the unit completely.

• 📉 Voltage drop in a network below 190 Volts does not allow the motor to develop the required torque.
• 🔥 Overheating due to poor ventilation of the condenser at the back of the refrigerator.
• ❄️ Lack of freon: in some models, sensors block starting at low pressure in the system.
• ⚡ Malfunction wiring inside the harness going to the motor.

If the refrigerator Atlant stopped freezing after a power surge, most likely the relay burned out or a breakdown of the winding insulation occurred. In this case, simply replacing the relay may not help, and more in-depth diagnostics will be required.

Precautions and safety precautions

Working with refrigeration equipment involves the risk of high voltage electric shock and burns. The compressor in operating condition heats up to high temperatures, and the refrigerant under pressure can be dangerous if depressurized.

It is strictly forbidden to cut compressor tubes or open the system without the appropriate equipment and skills. This will lead to the release of freon and the entry of moisture into the circuit, which will completely disable the refrigerator.

⚠️ Attention: Carry out all work on the electrical part only with the device completely disconnected from the network. Capacitors in the circuit can retain a charge for some time after switching off.

Use only a working tool with intact insulation. If you feel unsure of your abilities or see complex damage to the wiring, it is better to contact a specialized service center.

Following these simple rules will help you safely carry out diagnostics and, possibly, return the refrigerator Atlant to life without calling a technician.

Frequently asked questions (FAQ)