Sudden failure refrigerator Atlant turns into a serious problem that threatens damage to a large supply of food. Most often, owners notice a malfunction when the temperature inside the chambers rises, and the unit itself ceases to emit the characteristic hum of a running motor or, conversely, hums, but does not produce cold. Compressor is the heart of the system, and it is with its diagnosis that one should begin searching for the causes of the breakdown before calling a technician or buying new equipment.
Self-check allows you to save a significant amount on calling a specialist if the problem lies in small things that you can fix yourself. However, it is important to understand that working with refrigerant requires strict adherence to safety precautions and basic knowledge of the device. If you are not confident in your abilities, it is better to stop at the stage of visual diagnostics. electricity and refrigerant requires strict adherence to safety precautions and basic knowledge of the device refrigeration equipment. If you are not confident in your abilities, it is better to stop at the visual diagnostic stage.
In this article we will analyze an algorithm of actions that will help determine whether the motor is alive or its replacement is inevitable. You will learn how to distinguish a burnt winding from a jammed piston and why relay clicks may be a signal that you need to replace an inexpensive part instead of buying a new unit.
Primary visual diagnosis and analysis of symptoms
Before picking up tools, it is necessary to conduct a thorough external inspection and analyze the behavior of the unit. Compressor malfunction often accompanied by specific signs that are noticeable without disassembly. The refrigerator Atlant can behave in different ways: it can be silent, it can hum, but not start, or it can work continuously without turning off.
Pay attention to the rear grille of the condenser. If the motor is running but there is no cold, the grill may be barely warm or completely cold. In the case where the compressor jammed, it may make a loud click and go silent, or hum, trying to start, after which the thermal protection is triggered. Also an important indicator is the smell: the smell of burning or burning plastic often indicates a burnt winding or melted contacts.
Check the integrity of the power cord and plug. Sometimes simple cable damage leads to the fact that the equipment does not receive enough voltage to start. Make sure the outlet is working by connecting another electrical appliance to it. If the power supply is fine and the refrigerator is silent, the problem is most likely inside.
- 🔍 Carefully inspect the wiring for melted areas or traces of rodents.
- 👂 Listen: silence, interrupted by rare clicks, often indicates a problem with the start relay.
- 🌡️ Touch the compressor housing: if it is hot, but does not work, perhaps the thermal relay has turned it off due to overheating.
Removing the casing and accessing the electrical part
To carry out in-depth diagnostics, you need to gain access to the compressor, which in models Atlant is usually located in the lower rear part of the case. This stage requires caution, since you will be working in close proximity to electrical components and copper pipes refrigeration circuit.
First, completely turn off the power to the refrigerator by unplugging the cord from the outlet. This is a critical safety rule. Then move the unit away from the wall for easy rear access. You will need to remove the rear metal panel (crankcase) that covers the engine compartment. It is usually secured with several screws or latches.
After removing the panel, you will see a black cylindrical or pear-shaped tank - this is the compressor. Adjacent to the side or top of it is a plastic box closed with a lid. This is a casing start relay and a thermal protective device. This is where all the electrical control for starting the engine is concentrated. Carefully remove the cover by unscrewing the screws or releasing the latches.
☑️ Safe access to the compressor
It is important not to damage the copper tubes going to the compressor. They are thin and easily deformed. If you notice traces of oil under the compressor or on the floor, this may indicate depressurization of the system, which makes further diagnostics of the motor pointless without refilling with freon.
Diagnostics of the starting relay and thermal protection
Before sinning on the motor itself, it is necessary to exclude the malfunction of its “companions”. The starting relay is responsible for providing a starting impulse, and thermal protection turns off the power if it overheats. In refrigerators Atlant these elements often fail before the electric motor itself.
Carefully remove the relay from the compressor contacts. Usually it is simply pulled off from three pins. Visually inspect the insides: there should be no traces of burning, soot or melted plastic. If the relay is RTP type, there is a coil and a bimetallic plate inside. Try shaking the relay next to your ear: if you hear the sound of broken glass or a knock, it means the insides are destroyed.
⚠️ Attention: The thermal relay may be hot after operation. Let it cool before checking so as not to get burned and not to distort the diagnostic results.
Checking the integrity of the thermal relay circuit is performed by testing it with a multimeter. In a cold state, the contacts should be closed (resistance close to zero). If the multimeter shows a break (one in the most significant digit), it means that the protection has burned out and requires replacement. This is an inexpensive part that often saves the motor from burning out during power surges.
Is it possible to start a refrigerator without a relay?
Theoretically, you can start a motor without a starting relay by applying voltage directly to the working and starting windings, but doing this is strictly not recommended without experience. This may result in immediate burnout of the windings or personal injury. This method is used only by masters for a short-term check of the “survivability” of the motor.
Checking the compressor windings with a multimeter
If the relay and protection are working properly, it is time to check the very heart of the unit. There are three contacts on the compressor housing to which the relay is connected. Usually they are marked with letters or symbols: S (Start - startup), R (Run - working) and C (Common - general). In some models Atlant the marking may be different, so it is important to know the circuit.
To check, you will need a multimeter switched to resistance measurement mode (Ohm). First, visually check that the contacts on the compressor itself are clean, not oxidized or burnt. Then start taking measurements between pairs of contacts. Normal resistance values depend on the power of the motor, but are usually:
- 🔌 Between common and working contacts: from 10 to 30 Ohms.
- ⚡ Between common and starting contacts: from 20 to 50 Ohms.
- 🔄 Between starting and working contact: the sum of the two previous values.
If the multimeter shows infinity (open) on any of the windings, this means that the internal circuit is open. It is impossible to restore a burnt winding at home - the compressor must be replaced. If the device shows zero or very low resistance, this is a sign of an interturn short circuit. In both cases, the motor is faulty.
It is also critically important to check breakdown to the body. Press one multimeter probe to any of the contacts, and the second to a copper tube or an unpainted part of the compressor housing. The device should show infinity. If there is at least some resistance, it means that the insulation is broken, and touching the metal parts of the refrigerator while the unit is connected to the network is deadly.
Mechanical check: jam or pressure?
There are cases when the electrical part of the compressor Atlant absolutely intact, the windings are ringing, the relay is working properly, but the motor does not start or makes a humming sound. This may indicate a mechanical problem such as a stuck piston or loss of compression. This is more difficult to diagnose, since partial depressurization of the system is required.
One of the testing methods is to try to start directly (only for experienced ones!). If, when voltage is applied, the motor hums and tries to jerk, but does not start, it may be jammed. Sometimes briefly applying voltage to the starting winding with increased current helps, but this is risky. A safer way is to check the outlet pressure.
To do this, technicians cut through the capillary tube or discharge tube. If, upon startup, air (or freon) comes out of the tube with force, then the compressor is pumping. If there is no gas outlet or it barely blows, the compressor is worn out and does not create the necessary pressure pressure for circulation of the refrigerant.
| Symptom | Probable cause | Action |
|---|---|---|
| Silent, the windings are broken | The winding is burned out | Replacement of the compressor |
| Buzzes, clicks, does not start | Relay jammed or faulty | Replacement of relay / Attempt to wedge |
| Works, but does not freeze | No compression or freon leak | Check pressure, search leaks |
| Breakage to the housing | Insulation is broken | Urgent replacement (life-threatening) |
⚠️ Attention: If you have cut through the tubes to check the pressure, the system is depressurized. Air and moisture got into it. You cannot simply weld the tubes back - the system must be evacuated and filled with new freon according to the norm.
Common mistakes during self-diagnosis
Trying to save money, refrigerator owners Atlant often make mistakes that turn a simple repair into an expensive replacement of the entire unit. The most common mistake is ignoring the condition of the wiring. Even if the multimeter shows normal, poor contact in the terminal block can cause sparking and heating, simulating a motor breakdown.
Another mistake is an attempt to “reanimate” a burnt-out compressor by lubricating or tapping. Modern sealed motors are not designed to be opened and repaired inside the housing. Any intervention in the HDA without special equipment is doomed to failure.
Also, do not forget about the capacitor (if it is in your relay circuit). A failed capacitor may not provide the required phase shift for starting, and the master will correctly consider the motor to be inoperative. Always check the entire circuit as a whole.
If after all the checks you find out that the compressor is faulty, weigh the cost of a new motor and the work to replace it. Sometimes for older models Atlant it is more economically expedient to purchase a new refrigerator than to repair the old one, taking into account the cost of work and refrigerant.
Is it possible to replace the Atlant compressor with an analogue from another manufacturer?
Technically possible if the landings match dimensions, refrigerant volume and oil type. However, manufacturers use different characteristics, and installing a non-original motor can lead to incorrect operation of the refrigerator or rapid failure of the new compressor. It is better to look for the original or proven analogues recommended by the manufacturer.
Why does a new compressor heat up to 90 degrees?
High housing temperature (up to 80-90°C) for a compressor is a normal operating mode. It heats up from gas compression and friction. You should be concerned if it becomes so hot that it is impossible to touch it, or if it is hot, but the refrigerator does not freeze.
You hear the sound of flowing liquid after turning it off - is this normal?
Yes, this is absolutely normal. After the compressor stops, the pressure in the system equalizes and the refrigerant flows from the high pressure zone to the low pressure zone, making gurgling sounds. This is not a sign of a malfunction.