Owners household appliances often encounter a situation when the refrigerator Atlant begins to make unusual sounds. A quiet hum or loud hum can become a serious irritant, especially if the equipment is installed in a kitchen-living room or studio apartment. Understanding the nature of these sounds allows you not only to maintain peace of mind, but also to prevent serious damage to expensive equipment.
In most cases, noise during operation is a normal physical process associated with the circulation of refrigerant or the operation of an electric motor. However, a sudden change in the acoustic profile, the appearance of vibration or hum that was not there before, signals the need for intervention. It is important to learn to distinguish between normal sounds and signs of malfunction so as not to miss the moment for prevention.
In this article we will analyze in detail the physics of the compressor, the design features of various series Atlant and methods of dealing with excess noise. You will learn why dual-compressor models can hum louder than single-compressor models and how to properly install the unit to minimize resonance.
Physiology of compressor operation and noise standards
The heart of any refrigerator is compressorwhich ensures circulation refrigerant through the system. Models Atlant most often use piston engines, the operating principle of which is based on the reciprocating movement of the piston. This mechanical process is inevitably accompanied by vibration and sound, the level of which is regulated by technical standards.
The normal noise level is 36–40 dB for modern inverter models and up to 45 dB for classic linear compressors. If the refrigerator Atlant hums, but the sound level does not exceed the specified values and is not accompanied by rattling of the case, most likely the equipment is working. This is especially true for older series, where noise insulation the engine compartment is minimal.
The intensity of the hum directly depends on the load on the engine. At initial start-up, after defrosting or loading a large amount of warm food, the compressor operates at maximum speed. At such moments Atlant double-engine refrigerators can hum louder than usual due to desynchronization of the circuitswhich is a design feature, not a defect.
There is also the concept of “thermal noise”, when the refrigerant, changing from liquid to gaseous state and back, makes gurgling or flowing sounds. This is normal for c Freon R600asystems, which are used in many modern models of the brand. If the humming turns into a metallic clang or whistle, this is a cause for concern.
Errors during installation and installation of equipment
One of the most common reasons why a refrigerator Atlant hums loudly is incorrect installation. Even a perfectly working compressor will create strong resonance if the unit is not level or touches walls and furniture. Vibration from a running engine is transmitted to the housing and then to the floor, increasing significantly.
The first thing you need to check is the horizontality of the installation. Use a building level or just rock the refrigerator. If it wobbles, you need to adjust the height of the front supports. Many users ignore the rear wheels, relying only on the front legs, which leads to distortion and vibration of the frame.
- 🔧 Make sure that there is a gap of at least 5-7 cm between the back wall of the refrigerator and the wall of the room for free air circulation.
- 🔧 Check whether the side walls of the cabinet or other furniture are touching, as any contact increases the hum.
- 🔧 Inspect the floor: if it is wooden or has voids, the vibration will be transmitted very strongly, creating a drum effect.
⚠️ Attention: Never install the refrigerator close to the wall. A violation of heat exchange will lead to overheating of the condenser, the compressor will begin to work without interruptions and hum much louder than usual, which will shorten its service life.
If the floor in the room is uneven, you can place special anti-vibration pads made of thick rubber under the legs. They dampen high-frequency vibrations and prevent the unit from “walking” on the tiles. It is also worth checking whether the internal shelves or bottles on the door are vibrating, which can resonate with the frequency of the motor.
Problems with the fan and the No Frost system
Refrigerators Atlant with a system No Frost or a mixed type of cooling are equipped with fans. These devices circulate cold air inside the chambers. Over time, fan bearings can wear out and ice can build up on the blades, causing imbalance and a characteristic humming or howling sound.
If you hear a noise similar to a computer cooler, but louder and with intermittent knocking, the problem is likely in the evaporator fan. In winter, when indoor humidity is low, ice forms on the blades faster. In such cases, completely defrosting the refrigerator during the day helps.
☑️ Fan diagnostics
In some models, the fan may touch wiring or frozen ice. To eliminate the problem, it is often enough to carefully clear the space around the impeller. If the noise persists after defrosting and checking for obstacles, it will be required replacing the fanas the bearing could have completely failed.
Why does the fan make noise only at night?
At night it is quieter, and extraneous sounds become more noticeable. In addition, at night the voltage in the network may drop, due to which the fan motor is unstable, or the fast freezing mode simply turns on, increasing the speed.
Wear of compressor parts and start relay
When the refrigerator Atlant hums, but does not cool or cools weakly, the problem often lies in the compressor or its starting system. Aging of the lubricant, wear of the piston group or valves leads to an increase in clearances and the appearance of a metallic knock or a strong hum. This is typical for equipment that has served for more than 7–10 years.
Deserves special attention starting relay. This small element is responsible for starting the engine. If the relay is faulty, the compressor may hum, click but not start, or start with a strong jerk and noise. In such cases, the motor quickly heats up and is turned off by a thermal relay.
Diagnostics of the compressor requires special tools, such as pressure gauges to check the pressure in the system. However, the initial assessment can be done visually and auditorily. If the compressor housing is heated to 80–90 degrees, and the refrigerator does not freeze, this is a sign interturn short circuit or a wedge of the compression mechanism.
| Type of sound | Probable cause | Required actions |
|---|---|---|
| Monotonous hum | Normal operation or poor installation | Check level, clearances |
| Metal knocking | Wear of the piston group | Replacing the compressor |
| Whistling or howling | Fan malfunction | Defrosting or replacing the fan |
| Clicks and humming | Faulty start relay | Replacing the relay |
The influence of refrigerant and system condition
The sound of a running refrigerator depends on the type of refrigerant used. Models Atlantworking on R134a, may produce more noticeable sounds of liquid flow than units on R600a. The latter is considered quieter, but if freon leaks in the system, a characteristic whistle may occur at the site of damage to the circuit.
If moisture has formed in the system air lock or has entered, the compressor noise becomes uneven and intermittent. In such cases, the hum is accompanied by gurgling, which can be heard even through the closed door. This indicates a violation of the tightness or quality of the filling.
It is important to note that after transporting the refrigerator in a horizontal position, it cannot be turned on immediately. The oil must drain into the compressor crankcase, otherwise the engine will run “dry”, making loud noises and at risk of failure in the first minutes of operation.
Methods for reducing noise do it yourself
If technically the refrigerator Atlant is working, but the hum is too loud for comfortable living, you can use a number of methods to reduce the noise level. The effectiveness of these measures depends on the specific model and operating conditions.
One of the effective ways is to install anti-vibration stands under the legs. They are made of dense rubber or polymer materials and dampen vibration transmitted to the floor. You can also try moving the refrigerator further from the wall than the instructions require to reduce resonance.
- 🔇 Secure all loose elements inside: check the fastenings of shelves, drawers and bottles.
- 🔇 Insulate the tubes: sometimes the copper tubes on the back wall can vibrate from the flow of refrigerant, they can be carefully (not squeezing!) fix.
- 🔇 Check the contents: empty glass jars or bottles, in contact with each other, can create a ringing sound that increases the overall hum.
⚠️ Attention: Do not try to disassemble the sealed compressor circuit or change freon yourself without the appropriate equipment and license. This is dangerous to life and health, and also violates the warranty.
When it is necessary to call a specialist
There are a number of symptoms in which independent repair is impossible or dangerous. If the refrigerator Atlant hums, and the following symptoms are observed, professional diagnostics are required:
Firstly, if the compressor works continuously, without turning off, and the body is hot. This indicates a loss of performance or a refrigerant leak. Secondly, if the hum is accompanied by the smell of burning or melted plastic, this is a sign of overheating of the wiring or motor windings.
The technician will be able to accurately determine whether replacement of the compressorrefilling the system or removing a blockage in the capillary tube is required. The use of original spare parts Atlant guarantees the restoration of factory noise and energy efficiency parameters.
Why does the new Atlant refrigerator hum loudly in the first days?
The new refrigerator may hum louder due to the fact that the parts have not yet gotten used to each other. Incorrect transportation (oil in the tubes) or transportation bolts/fasteners that have not been removed are also often the cause. Let the equipment work for 2-3 days in a gentle mode.
Is it possible to lubricate the compressor if it starts to hum?
It is impossible to lubricate the refrigerator compressor yourself, since it is a sealed unit. Attempts to drill a hole or disassemble it will lead to freon leakage and final failure. Only replacement of the unit.
Does the network voltage affect the noise of the refrigerator?
Yes, low or unstable voltage in the network causes the compressor to work with overload, which increases the hum and vibration. To protect equipment and reduce noise, it is recommended to use a voltage stabilizer.