Diagnostics of brand refrigeration equipment Atlant often becomes the first step before calling a technician or doing independent repairs. Owners of Belarusian equipment value it for its reliability, but even time-tested models can fail due to power surges or natural wear of parts. Initial check allows you to understand whether it is worth undertaking complex repairs or whether the problem can be eliminated by replacing a small part.
Before you start disassembling the unit, you need to make sure that the problem lies within the device and not in the external power supply. It often happens that refrigerator it is working properly, but does not work due to a poor contact in the socket or a broken power cord. The lack of cold when the compressor is running most often indicates a freon leak or a clogged capillary tube, rather than a breakdown electronics.
In this article we will analyze in detail the algorithm of actions for identifying faults in single-compressor and double-compressor models. You will learn how to safely check the main components and what tools are needed for accurate diagnosis.
Primary visual diagnostics and power check
Any test begins with an external examination and analysis of the behavior of the device. If Atlant refrigerator does not turn on, first check for voltage in the outlet. Connect any other working electrical appliance to it, for example, a lamp or hair dryer, to eliminate problems with the wiring in the apartment.
Carefully inspect the power cord for creases, melting or marks of pets' teeth. Insulation damage is a common cause of a short circuit, which triggers internal protection or knocks out circuit breakers in the panel. If the cord is intact, check the tightness of the plug in the socket.
Inspect the back wall of the unit. There should be no traces of burning, soot or oily stains on it. The appearance of oil may indicate depressurization of the system, which requires immediate intervention by specialists. Also pay attention to the condition of the capacitor (grid on the back): it should be clean and dry.
- 🔌 Check the voltage in the network with a multimeter or by connecting another device.
- 👀 Inspect the power cord for physical damage to the insulation.
- 🧹 Make sure the capacitor at the back is clean and has no traces oil.
- 👂 Listen to any sounds: humming, clicking or complete silence.
If external signs indicate that the wiring is working, but the equipment does not respond when turned on, the problem may lie in the internal fuse or thermostat. In some models Atlant the thermostat has a defrost button, which could be stuck in the "off" position.
Diagnostics of the compressor and start relay
The heart of the refrigeration system is compressor. If the motor hums but does not start, or starts for a few seconds and stalls with a characteristic click, the start relay or motor windings are most likely faulty. To check, you will need a multimeter.
Remove the plastic casing at the back of the unit to gain access to the compressor. Carefully remove the box with the start relay and protection. Visually inspect the insides: if you hear a burning smell or see carbon deposits on the contacts, the part requires replacement. A relay is a consumable item that often fails.
⚠️ Attention: Before removing the relay, be sure to disconnect the refrigerator from the power supply! Residual voltage or accidental contact with contacts under current can lead to electric shock.
Checking the compressor windings is carried out by testing the contacts with a multimeter in resistance measurement mode. Normal values for different contact pairs (start, run, common) vary, but they should not show an open (infinity) or short circuit (zero). If the windings “ring” against the housing, the compressor is faulty and requires replacement.
How to properly remove the start relay?
Take a photo of the location of the wires before disconnecting. The relay is simply removed from the compressor pins, but may dry out over time. Gently rock it from side to side, without using excessive force, so as not to break the plastic ears.
A common mistake is trying to start an old compressor with a new relay. If the motor has an interturn short circuit, the new relay will burn out instantly. Therefore, a comprehensive check of the electrical circuit is mandatory.
Checking the thermostat and temperature sensors
If the compressor runs non-stop or, conversely, does not turn on at all, although it is warm in the chamber, suspect the thermostat (in mechanical models) or temperature sensors (in models with electronic control Knopka or display). In mechanical Atlantakh the thermostat is located inside the chamber or outside on the housing.
To check the mechanical thermostat, it must be removed. Carefully remove the adjustment knob and unscrew the fastener. Test the thermostat contacts with a multimeter. At room temperature the contacts should be closed (resistance close to zero). If you put the sensor in the freezer, the contacts should open after some time.
In refrigerators with a system No Frost or electronic control, air sensors are responsible for the temperature. Their test is similar: the resistance is measured at room temperature and compared with a table of values for a specific model. Deviation of resistance from the norm indicates a malfunction of the element.
☑️ Checking the thermostat
| Symptom | Probable cause | Check method |
|---|---|---|
| The refrigerator does not turn on | Faulty thermostat | Closing the contacts with a jumper |
| The compressor is running non-stop | Freon leakage or thermostat | Temperature measurement in the chamber |
| The freezer is working, refrigerator compartment no | Faulty defrost sensor | Checking sensor resistance |
| Frequent on/off | Problem with relay or thermostat | Visual inspection relay |
Testing the defrost system (No Frost)
In models with the system No Frost a frequent problem is the formation of an ice coat on the evaporator, which blocks air circulation. This leads to the fact that the refrigerator compartment is warm, and the temperature in the freezer may be higher than normal. The defrost system consists of a heating element, a defrost sensor and a timer (or electronic module).
The first step in diagnosis is a visual inspection of the evaporator. Remove the back panel in the freezer compartment. If a layer of ice or snow is visible on the radiator, the defrost system is not working. The heating element of the heater should be checked with a multimeter; if the resistance is infinite, the spiral is burned out.
The defrost sensor (defroster) is checked for resistance. It should open the circuit when heated and close when cooled. The malfunction of this small element often leads to the fact that Atlant refrigerator stops freezing, although the compressor is working properly.
⚠️ Attention: Do not try to break off the ice with a knife or sharp objects! Damage to the evaporator tubes will lead to immediate release of refrigerant and costly repairs with sealing and refilling.
It is also worth checking the drain hole. If it is clogged with dirt or ice, the water does not go into the pan during defrosting, but freezes, forming a giant ice block that blocks the fan.
Checking the fan and air circulation
In two-chamber refrigerators Atlant with the No Frost system, the fan is responsible for the distribution of cold. If you hear that the compressor is running, but no cold is entering the refrigerator compartment, the fan may have stopped.
You can get to it by removing the back panel of the freezer. Manually check that the blades rotate easily. Often the fan bearing becomes dry and requires lubrication or replacement. Also check whether voltage is supplied to the terminals of the fan motor when the compressor is running.
Lack of air circulation leads to local overheating of the evaporator and incorrect operation of the sensors. As a result, the refrigerator may “think” that the norm has been reached and turn off the compressor until the food in the main chamber deteriorates.
Diagnostics of the electronic control module
Modern models Atlant are equipped with electronic control units. If none of the above reasons are confirmed, and the equipment behaves inappropriately (indicators blink, chaotic switching on), the problem may be in the board.
Visually inspect the board for swollen capacitors, blackened tracks or traces of moisture. Swollen capacitors are a common cause of unstable electronics. Replacing these elements is inexpensive and often revives the module.
However, if the board shows obvious traces of thermal effects or burnt chips, independent repairs without special equipment and circuits are impossible. In this case, it is easier to replace the module with a new one or send it to a specialized service for re-soldering.
What to do if the refrigerator makes a strange whistle?
A whistling sound is most often produced by the compressor when operating at maximum capacity or when there are microcracks in the valves. Refrigerant passing through a narrowed area (capillary) can also whistle. If it is caused by vibration, check whether the tubes are touching the housing or each other.
Is it possible to operate a refrigerator with a faulty sensor?
Short-term - yes, but this will lead to freezing of food or, conversely, spoilage. The compressor will operate in abnormal mode, which will reduce its service life. It is better to replace the sensor, since this is an inexpensive part.
Why does the refrigerator not turn on after defrosting?
You may have damaged the wiring during defrosting or flooded the electrical unit with water. The thermostat could also fail due to a sudden temperature change. Allow the equipment to dry completely (24 hours) before turning it on again.
To summarize, we can say that most faults Atlant refrigerator can be diagnosed independently with a basic set of tools and a multimeter. Attention to detail and compliance with safety precautions will help you save time and money.