Modern household appliances under brand Ariston (often found in conjunction with Indesit) are complex units that ensure the safety of products by maintaining a low temperature. Understanding exactly how this mechanism functions is necessary not only for engineers, but also for ordinary users who want to extend the life of the device. Operating principle It is based on the physical laws of thermodynamics, where the refrigerant circulates in a closed circuit, taking heat from the internal chamber and releasing it to the environment.
Unlike the primitive models of the past, modern refrigerators Ariston equipped with sophisticated control systems that regulate the operation of the motor depending on the load. If you hear a hum or notice cycling on and off, this is normal operation compressor. It is important to distinguish between the normal operation of the unit and signs of malfunction, so as not to call a technician unnecessarily.
The cooling efficiency directly depends on the serviceability of all system components. The key element is It is the compressor-condenser group that determines the resource of the entire unit, and not the electronic control board. We will analyze in detail each stage of the cooling cycle and the components that are responsible for it.
Fundamentals of the refrigeration cycle and the role of the refrigerant
Fundamentally, the cooling process in refrigerators Ariston is no different from the operation of most compression models. The heart of the system is refrigerant (often freon R600a or R134a), which changes its state of aggregation when the pressure changes. In its liquid state, it is capable of absorbing enormous amounts of heat, evaporating at very low temperatures.
The circulation of the substance occurs in a sealed circuit. First, the refrigerant enters the evaporator, where it boils and turns into gas, actively removing heat from the walls of the chamber. The gaseous substance is then sucked into the compressor, compressed and sent under high pressure to the condenser. There it cools down and becomes a liquid again, ready to repeat the cycle.
The speed of this cycle is controlled by a thermostat or an electronic module. In models with No Frost the process is complicated by the presence of fans that force cold air through the chambers, preventing the formation of an ice crust on products.
Compressor: the heart of the refrigeration system
The compressor in refrigerators Ariston performs the function of a pump, creating the necessary pressure for the movement of freon. Modern models are often equipped with inverter motors that operate smoothly, without sudden starting currents. This reduces the noise level and saves energy, although the repair of such components requires higher qualifications.
Inside the sealed casing there is an electric motor and a mechanical part (piston or rotor group). When the engine starts, vibration is created, so the compressor is installed on special shock-absorbing springs or rubber feet. If you hear knocking or rattling, the mount may have become loose or there is a problem with the motor mounting.
It is important to understand the difference between normal and inverter compressor. The usual one works in the “start-stop” mode: turned on at full power, cooled down, turned off. The inverter never stops completely, but only changes speed, maintaining the temperature in a narrow range. This ensures more stable storage of products.
No Frost system and air flow control
Technology Total No Frostused in many models Ariston, radically changes the approach to defrosting. In such devices, the evaporator is hidden behind the back wall of the freezer, and cooling occurs due to air circulation. The fan forces air through the cold evaporator and distributes it among the chambers through special channels.
The main advantage of such a system is that there is no need to manually turn off the refrigerator to remove ice. However, the work of The defrost heating element and the timer is critically important here. Periodically, the system goes into defrost mode: the fan and compressor are turned off, the heating element is turned on, which melts the ice on the evaporator. The water flows into the drain pan.
- ❄️ Fan: ensures uniform distribution of cold throughout the entire volume of the chamber.
- 🔥 Defrosting heating element: heats the evaporator to remove condensation and ice.
- 💧 Drainage system: discharges melt water into the evaporation tank on the back wall.
If snow or ice appears on the back wall in a refrigerator Ariston with the No Frost system, this is the first sign of a system malfunction defrost. Most often, the heating element burns out or the defrost sensor fails, which is why the system “thinks” that there is no ice and does not turn on the heating.
⚠️ Attention: In No Frost systems, it is strictly forbidden to remove ice with a knife or sharp objects. A breakdown of the evaporator wall will lead to an instant release of freon and expensive repairs with sealing of the housing.
Electrical circuit and controls
The operation of the refrigerator is controlled through an electrical circuit, which can be either analog (mechanical) or electronic. In simple models, the device that opens the contacts when the set temperature is reached is responsible for everything. In more complex units thermostat - a device that opens contacts when a given temperature is reached. In more complex units Ariston an electronic control module is installed that receives data from several sensors.
The starting relay plays a critical role in starting the engine. It connects the compressor's starting winding for a split second to start the rotor, and then turns it off. If the relay is faulty, the compressor will hum but will not start, or will click constantly. Replacing the relay is one of the most common and simplest repair procedures.
Why is the temperature indicator blinking?
The blinking indicator on the control panel of the Ariston refrigerator most often signals that the temperature in the chamber has risen above the permissible limit. This could be caused by a recent load of warm food, a door not closing properly, or a faulty sensor. If the blinking continues for more than 24 hours with the door closed, diagnostics are required.
Temperature sensors (thermistors) are located at different points: in the refrigerator compartment, in the freezer, on the evaporator. They transmit resistance, which the module interprets as degrees. An error in the sensor readings can lead to the refrigerator working without stopping or, conversely, rarely turning on, spoiling food.
Diagnostics of typical faults
Knowledge of the device helps to quickly identify the problem. If the refrigerator Ariston stops freezing, but the light inside is on and the motor is humming, there may be a freon leak or a blockage in the capillary system. If the motor is silent, the problem may be in the power circuit, thermostat or start relay.
Continuous operation of the compressor without shutting off is an alarming symptom. This may indicate loss of door seals, a refrigerant leak, or poor cabinet insulation. In such cases, the unit works for wear, trying to reach an impossible temperature.
☑️ Primary diagnostics of the refrigerator
Extraneous sounds also carry information. Gurgling and hissing sounds are normal (freon movement). A metallic clanging sound may indicate problems with the compressor suspension or a foreign object entering the fan area (in No Frost models).
Table of main components and their functions
To systematize knowledge about the structure of the refrigerator Ariston it is convenient to use a pivot table. It will help you understand which node is responsible for what and where to look for it during a visual inspection.
| Component | Location | Main function | Fault symptom |
|---|---|---|---|
| Compressor | Lower rear part | Compression and pumping of freon | Does not turn on, hums, overheats |
| Condenser | Rear grille | Gas cooling and condensation | Cold (must be warm), contaminated with dust |
| Evaporator | Hidden behind the wall | Evaporation of freon and heat intake | Icing ("fur coat"), lack of cold |
| Thermostat | Inside the chamber / behind | Temperature adjustment | The refrigerator does not turn off or turn on |
This table covers the basic elements, however, in modern models the list can be expanded with electronic sensors and solenoids. Understanding the role of each element simplifies the dialogue with the service engineer.
Operating rules to extend service life
In order for the refrigerator Ariston to serve for a long time, it is important to follow the operating rules. It is not recommended to load hot products into the chamber, as this creates excessive load on the compressor and leads to the formation of condensation. It is also necessary to monitor the cleanliness of the condenser grille at the back - dust acts as a heat insulator, interfering with the cooling of freon.
Regular defrosting (for drip systems) and checking the door seals are mandatory procedures. If the rubber band does not fit tightly, warm, moist air enters the chamber, which leads to increased ice formation and more frequent motor cycles.
Do not ignore minor faults. Timely replacement of an inexpensive sensor or relay can save an expensive compressor from burning out. Remember that repairing complex equipment requires a professional approach and special tools.
Why does the Ariston refrigerator make a lot of noise during operation?
The noise can be caused by several reasons: incorrect installation (legs not adjusted, touching the furniture wall), fan malfunction in the No Frost system (ice or debris ingress), wear of the compressor bearings or just normal operation sound motor. If the noise appears suddenly and becomes louder than usual, you should call a technician.
How often do you need to defrost a refrigerator with the No Frost system?
Technically, the No Frost system does not require manual defrosting to remove ice. However, manufacturers recommend carrying out preventive defrosting and washing of chambers 1-2 times a year. This is necessary for hygiene, removing odors and checking the condition of seals and drainage holes.
What to do if there is water on the floor in the refrigerator compartment?
Most often this indicates a clogged drainage hole for removing melt water. It is located on the back wall inside the camera. It can be gently cleaned with a soft wire or a cotton swab. Water may also appear if the drainage hose at the back of the unit breaks.
Is it possible to transport the Ariston refrigerator lying down?
Transportation lying down is not recommended, since oil from the compressor can leak into the freon circulation circuit, which will lead to water hammer at startup. If transportation lying down is unavoidable, after installation the unit must stand vertically for at least 4-6 hours (preferably a day) before turning on, so that the oil flows back into the crankcase.