The situation when The Atlant refrigerator turns on and immediately turns off.is familiar to many owners of this popular Belarusian equipment. Instead of the usual steady hum of a running motor, you hear a short click, perhaps a hum that lasts a few seconds, and then silence again. The cycle can be repeated at certain intervals, creating the illusion of normal operation, but the temperature inside the chambers does not drop, and the products begin to deteriorate.
This behavior of the unit indicates the activation of the protection system or a critical malfunction of one of the components. of the refrigeration circuit. Most often, the problem lies in the electrical part: the start relay, motor windings or wiring. However, we cannot exclude more complex mechanical damage, such as a wedge of the piston group or a freon leak, which require the intervention of professionals.
In this article we will analyze in detail why Atlant clicks and turns off, how to carry out initial diagnostics with your own hands and in what cases call a specialist inevitable. Understanding the nature of sounds and operating intervals will help you save time and money by avoiding unnecessary expenses on replacing serviceable parts.
The principle of operation of the compressor protective mechanisms
To understand why the refrigerator turns off immediately after the start, you need to understand the logic of the protective relay. This device “guards” the compressor electric motor and opens the power circuit when the permissible current or temperature is exceeded. If the motor cannot start due to a mechanical obstacle or electrical breakdown, the current in the windings increases sharply.
The thermal relay inside the housing reacts to the heating of the bimetallic plate. As soon as the temperature reaches a critical point, the contacts open and the power is cut off. After cooling (usually taking 15 to 40 minutes), the plate returns to its original position and the cycle of attempting to start is repeated. It is this process that the user perceives as the fact that the refrigerator turns on and off..
⚠️ Attention: Frequent attempts to start a faulty compressor lead to its overheating and eventual combustion of the windings. If you notice the described symptom, it is recommended to disconnect the device from the network until the reasons are determined.
It is important to distinguish between normal operation and emergency mode. Normally, the compressor runs for 10-20 minutes, followed by a pause. If the cycle lasts 1-2 minutes and is idle for a long time, or the motor hums for 3-5 seconds and clicks, this is a clear sign. Ignoring these signals can lead to expensive repairs or complete replacement of the component part. faults. Ignoring these signals can lead to expensive repairs or complete replacement of the component part.
Malfunctions of the starting and thermal relay
The most common reason for Atlant refrigerator clicks and does not turn onis the failure of the starting relay. This small black or gray box, mounted on the compressor housing, is responsible for sending an impulse to the starting winding of the engine. Inside it there is a coil and a movable core, which can stick or oxidize over time.
If the relay contacts are burnt or the mechanism is stuck in the upper position, the starting winding circuit does not open after start. This causes an overload and the thermal protection kicks in, shutting down the motor. Visually it looks like a short beep followed by a click. Replacing the relay is a simple procedure and often eliminates the problem if the compressor itself is working.
How to check the relay without instruments?
Take a working relay from another refrigerator or a new one (they are inexpensive). Remove the old one by carefully disconnecting the wires and removing them from the compressor shaft. Shake it: if a clear knocking sound is heard inside (like from broken glass), then the ceramic core is broken and the relay definitely needs to be replaced. Install a new one and check the startup.
The thermal relay may also fail. If its calibration is violated, it can operate at normal current, prematurely turning off a working motor. The test consists of “ringing” the contacts with a tester: when cold they should ring, and when heated (you can gently warm them up with a hairdryer without overdoing it) they should open.
- 🔌 Symptom: A click is heard 3-10 seconds after switching on, the motor hums, but does not start.
- 🔥 Cause: Sticking contacts of the starting relay or breakdown of the thermal relay.
- 🛠️ Solution: Replacing the starting protective device with one compatible for your model Atlant.
Problems with the compressor motor windings
If replacing the relay did not help and the refrigerator turns on and off with the same frequency, the problem may lie deeper - in the very heart of the unit, the compressor. The electric motor has two main windings: working and starting. When there is an interturn short circuit, the resistance of the windings drops, the current increases, and the protection turns off the device again.
You can check this using a multimeter. To do this, you need to remove the relay and measure the resistance between the contacts. Normal values vary between 10-30 Ohms for the working winding and 30-50 Ohms for the starting winding (depending on the model Atlanta). If the device shows zero (short circuit) or infinity (break), the compressor is faulty.
A special case is a breakdown in the housing. If, when measuring the resistance between any contact and a copper tube or motor housing, the tester shows at least some value (normally it should be infinity), operate this one. This can lead to electric shock when touching the metal parts of the case. refrigerator is dangerous. This may result in electric shock if metal parts of the housing are touched.
☑️ Diagnostics of compressor windings
Unfortunately, if an interturn short circuit is diagnosed, repair the compressor impossible at home. It needs to be replaced with a new one or rewinded in a specialized workshop, which is often not economically feasible. In such cases, owners often decide to purchase new equipment.
Mechanical compressor wedge and piston jamming
One of the most serious reasons why Atlant hums and turns off is the mechanical wedge. Inside the compressor's sealed casing is a piston group that compresses the refrigerant. Due to the depletion of service life, poor-quality oil or moisture entering the system, the rubbing parts may “get stuck.”
At the moment of starting, the motor tries to turn the shaft, but encounters strong resistance. A characteristic low-frequency hum or hum is heard, lasting several seconds, after which the thermal protection is triggered. If you try to start such a compressor right away, it may burn out. Sometimes the so-called “starting with increased voltage” or applying a pulse directly helps, but this is a temporary measure.
| Type of fault | Sound signal | Time to shutdown | Probability of repair |
|---|---|---|---|
| Relay malfunction | Loud click, silence | 1-5 seconds | High (part replacement) |
| Short circuit of windings | Humming, possible burning smell | 5-15 seconds | Low (compressor replacement) |
| Mechanical wedge | Low hum, vibration | 3-10 seconds | Medium (attempt to wedge) |
| Freon leakage | Silence or rare clicks | Works for a long time, does not freeze | High (charging) |
There is a method of “wedging” the compressor by applying 220V voltage to the working winding through a capacitor or using a transformer with a higher output voltage. However This method is effective only in 40% of cases and requires skills in working with high voltage. If after several attempts the shaft does not move, further actions can finally finish off the motor.
The influence of refrigerant leakage on the operation of the motor
Although a freon leak more often leads to the fact that the refrigerator simply stops freeze, in some cases it affects startup. If there is critically little refrigerant left in the system or air has entered, the compressor may be overloaded. However, a more typical scenario is when the refrigerator turns off not immediately, but after working for some time, or does not turn on at all due to the thermostat triggering (if it does not feel cold).
However, in modern models Atlant s inverter compressors or complex electronics, sensors can block startup if there is abnormal pressure in the system. If you see that the condenser grille on the back wall is cold, and the motor is trying to start and stalls, this may indirectly indicate problems in the refrigeration circuit.
Diagnostics of a leak requires a pressure gauge station. The technician connects to the system and checks the pressure. If it is not there, the system is pressurized with nitrogen and the leak is looked for by hissing or using a soap solution. Most often, freon escapes through corrosion of the evaporator tubes (“crying” refrigerator) or in places of factory soldering.
Electrical wiring and contacts
Trivial problems with the power supply cannot be discounted. If the refrigerator turns on and immediately turns off, the reason may be poor contact in the outlet, extension cord or inside the device itself. Oxidized contacts of a plug or socket create a high contact resistance, causing a voltage drop when starting the motor.
The compressor requires a powerful impulse to start. If the voltage in the network “drops” below 190-200 Volts, the motor may hum, but not start, which will again trigger the protection. Check the voltage in your outlet using a voltmeter when you try to start the refrigerator.
It is also worth inspecting the internal wiring. In older models Atlant the wires could rub against the body or melt due to proximity to the hot condenser tubes. A short circuit in the compressor power circuit will cause instantaneous protection or knock out the plugs in the apartment.
- ⚡ Checking the outlet: Connect another powerful device (hair dryer, kettle) to this outlet and check if it sparks.
- 🔌 Plug and cord: Inspect the power cord for creases, and the plug for melting.
- 🔦 Internal inspection: With the compressor casing removed, check the integrity of the insulation of the wires going to the relay.
⚠️ Attention: Carry out all work on diagnosing internal wiring and electrical components ONLY with the device completely disconnected from the network. Residual voltage in capacitors can be dangerous.
Self-diagnosis algorithm
If you decide to carry out diagnostics yourself, proceed consistently. First, rule out external factors: check the outlet, the voltage, and the integrity of the cord. Then move on to the insides, getting to the compressor (usually you need to remove the back cover at the bottom of the refrigerator).
First, inspect the start relay. If it has traces of burning, melting, or makes a knocking sound when shaken, begin repairs by replacing it. This is the cheapest and most likely reason. If the relay is visually intact, you will need a multimeter to check the windings and the relay itself.
If measurements show that the windings are intact and the relay is working properly, but the motor still does not start and hums, there is a high probability of a wedge. In this case, if you do not have experience and special equipment (propping press, vacuum pump), it is wiser to contact a service center. Further experiments may lead to final breakdown of the compressor.
When you need to call a technician
There are a number of situations when independent repair is impractical or dangerous. If the diagnostics showed a breakdown of the windings on the housing, the compressor requires replacement. To do this you need:
1. Release old freon.
2. Solder a new compressor (you need a torch, solder, flux).
3. Fill the system with refrigerant according to the scale.
4. Replace the filter drier.
This work requires a license and special equipment. In addition, if the refrigerator is under warranty, any tampering with the sealed components (capillary tube, compressor itself) will void the manufacturer’s warranty.
A technician is also needed if the problem is a clogged capillary tube. This requires purging the system with high pressure nitrogen and evacuation. It is almost impossible to “break through” the blockage on your own without the risk of damaging the thin evaporator tubes.
Frequently asked questions (FAQ)
Why does the Atlant refrigerator buzz for 5 seconds and turns off?
Most likely, the thermal protection relay is triggered. Reasons: faulty start relay (contacts stuck), interturn short circuit in the compressor windings or mechanical wedge of the piston group. Diagnostics with a multimeter is required.
Is it possible to operate the refrigerator if it turns off frequently?
It is strictly not recommended. Frequent starts in overload mode lead to overheating of the windings and final failure of the compressor. Oil may also leak or the wiring may burn out.
How much does it cost to replace the start relay for Atlant?
The relay itself is inexpensive (usually within a few hundred rubles), but the price may vary depending on the specific compressor model and the manufacturer of the spare part. The replacement services will cost more than the part itself.
What to do if the compressor is hot but the refrigerator does not freeze?
This is a classic sign of a freon leak or a compressor malfunction (does not create pressure). If at the same time it also turns off, it may be running “idle” or jammed. You need a technician with a pressure gauge.