Owners of equipment Atlant with two compressors often wonder how to properly defrost so as not to damage the complex cooling system. The dual-circuit system allows the refrigerator and freezer compartments to be cooled independently of each other, which creates certain nuances during maintenance. Unlike old single-compressor models, here the process requires a more careful approach to temperature conditions and sequence of actions.
Improper defrosting can lead to failure thermostat or damage to the evaporator, which will entail expensive repairs. Many users mistakenly believe that the presence of the system No Frost completely eliminates the need for defrosting, but this is not entirely true. Even modern models require periodic maintenance, although much less often than equipment with manual defrosting.
In this article we will analyze in detail the algorithm of actions that will allow you to safely clear the chambers of ice and maintain the efficiency of the unit. You will learn why it is important to turn off the compressor that is responsible for the freezer, and how to avoid common mistakes. Compliance with these rules will extend the life of your Atlanta for many years.
⚠️ Attention: Before starting any manipulations, be sure to make sure that the refrigerator doors are securely locked in the open position to avoid slamming and damaging the seal.
The principle of operation of a two-compressor system
Equipment Atlantequipped with two compressor motors is actually two independent refrigerators in one housing. One unit is responsible for maintaining a low temperature in the freezer, and the second is responsible for cooling in the refrigerator compartment. This scheme allows you to defrost one part of the device while the second continues to operate normally.
The key element here is the separation of the refrigerant and circuits. When you start the freezer defrost process, you do not need to touch the settings of the main refrigerator compartment. This is especially convenient if perishable products are stored in the main chamber that cannot be left without refrigeration for a long time.
The control system can be mechanical or electronic. Models with electronics often have a special “Holiday” or “Defrost” mode that automatically turns off one of the circuits. In mechanical models, such as Atlant 4004 or 4501, you will have to manually adjust the thermostats.
Understanding this difference is critical. If you simply unplug the cord, you will stop both compressors, losing all cooling. The right approach allows you to keep food in the refrigerator while the freezer thaws.
Preparing to defrost the freezer
The first step is to free up the internal space. All food must be removed from the freezer. If you plan to defrost only the freezer, the food can be temporarily transferred to the refrigerator compartment if there is free space and the temperature allows.
You should also remove all removable elements: shelves, drawers, ice trays. Plastic parts become fragile in the cold, so you need to remove them carefully, without sudden movements. It is better to put frozen foods in a thermal bag or wrap them in a blanket if the process takes a long time.
- 🧊 Prepare containers to collect melt water so as not to flood the kitchen.
- 🧹 Find a soft rag or sponge in advance to remove residual moisture.
- 🔌 Check access to the outlet and make sure that the power cord is not strained.
- 📋 Prepare a mild detergent for subsequent cleaning.
It is important to prepare a place for water to drain. In two-compressor models Atlant the drainage system may differ. In some cases, water collects in a special tray at the bottom, in others it can flow out. Cover the floor around the refrigerator with rags or place a low basin.
⚠️ Attention: Never use sharp objects (knives, screwdrivers) to chip ice. You can puncture the evaporator tubes, and the refrigerator will stop working forever.
☑️ Preparing for defrosting
Step-by-step instructions: how to defrost
The process of defrosting a two-compressor refrigerator Atlant has its own characteristics. The main rule is to turn off only the circuit that is responsible for the freezer. If you have a mechanical control, find the freezer temperature regulator (usually it is located inside the chamber or on the front panel at the top) and turn it to the “0” or “Off” position.
If you want to carry out a complete defrost or you do not have the opportunity to separate the circuits, disconnect the refrigerator from the network completely. For models with a No Frost system, complete defrosting is rarely required; usually 24 hours of inactivity is sufficient. For models with manual defrosting (drip system in the freezer), the process can take up to 48 hours.
Leave the freezer doors open. To speed up the process, you can put a container of hot water inside, but not boiling water, so as not to damage the plastic. Close the door for 10-15 minutes, then open and remove the softened ice. Repeat the procedure until the ice completely disappears.
| System type | Defrost frequency | Defrost time | Features |
|---|---|---|---|
| Manual (Direct Cool) | Once every 3-6 months | 12-24 hours | You need to manually remove ice |
| No Frost (Ventilation) | Once a year (prevention) | 12-24 hours | Ice is not visible, you need access to the evaporator |
| Low Frost | Once every 6-8 months | 8-12 hours | Ice forms slowly, a thin layer |
After all the ice has melted, thoroughly wipe the internal surfaces with a dry cloth. Do not turn on the refrigerator immediately. Let it stand with the doors open for another 30-60 minutes so that excess moisture evaporates and the smell disappears.
Features of defrosting the No Frost system
Refrigerator owners Atlant s system No Frost are often surprised to learn that their equipment also needs to be defrosted. Although the automation regularly defrosts the evaporator, ice may accumulate in hidden ventilation channels over time. This occurs due to the moisture contained in the products, which penetrates inside when the door is frequently opened.
Signs that the hidden evaporator is clogged with ice are: the hum of a compressor running non-stop, or insufficient cooling of the products when the motor is working. In this case, a “deep defrost” is required. To do this, the refrigerator Atlant is disconnected from the network for at least 24 hours with the doors open.
It is important to ensure good ventilation in the room during this process. Warm air should circulate freely inside the chambers to dry hidden cavities. The use of a hair dryer is strictly prohibited, as a hot stream of air can melt plastic air ducts or damage the insulation.
Why does ice form in No Frost?
Ice in the No Frost system is formed due to a broken door seal or frequent opening of the chamber. Warm, humid air gets inside, and the moisture condenses on the cold elements, gradually turning into an ice coat that the automation does not have time to remove.
After long drying, turn on the refrigerator and listen to the fan. If the noise disappears and cooling is restored, then the procedure was successful. If the problem remains, the defrost heating element or sensor may need to be replaced, which is already a task for the service center.
What you absolutely cannot do
There are a number of actions that can cause irreparable harm to your Atlanta. The most common myth is using a hair dryer or heater to speed up the melting of ice. A sharp temperature change is dangerous for the aluminum evaporator tubes and plastic elements of the housing.
Also, you should not try to speed up the process by placing a pan of boiling water inside without a stand. Plastic can become deformed from direct contact with a hot container. In addition, boiling water creates excess steam, which can be deposited on the electrical contacts.
- ❌ Do not use a knife, ice pick or screwdriver to chip ice.
- ❌ Do not pour hot water directly onto the walls of the chamber.
- ❌ Do not turn on the refrigerator while there is ice inside water.
- ❌ Do not use aggressive chemicals to clean plastic.
Particular attention should be paid to compressors. After defrosting, before turning it on, make sure that the area around the motor (usually the lower back) is dry. If you washed the floor around the refrigerator, check to see if water got into the electrical part.
⚠️ Attention: If you accidentally damage the evaporator tube and hear the hiss of escaping gas, immediately ventilate the room and call a technician. Filling the refrigerator with refrigerant on your own is dangerous and difficult.
Care after defrosting and starting
After defrosting and thorough drying is completed, you must properly start the refrigerator Atlant. Plug in the unit, but do not load food yet. Let the compressor idle for 1-2 hours. This will allow the system to reach operating temperature and stabilize the refrigerant pressure.
During this time, you can wash the shelves and drawers with warm water and a mild detergent. Do not use abrasive sponges, they leave micro-scratches in which bacteria will then multiply. Wipe the rubber seals with a solution of soda or a special rubber care product so that they do not dry out.
When the temperature in the chambers reaches normal (check with a thermometer if in doubt), you can gradually load in the products. Don’t overcrowd your freezer right after it’s been idle—let the system adapt. First, put a small portion, after an hour add more.
Regular care of a two-compressor refrigerator Atlant ensures its long service life. Keep the back of the condenser clean (if it is open) and check that the doors are tight. If a sheet of paper is clamped between the door and the body, but can be easily removed, the seal is in order.
Is it necessary to defrost the Atlant No Frost refrigerator?
Yes, preventative defrosting once a year is necessary even for the No Frost system. This helps remove ice plugs in hidden air ducts and eliminate unpleasant odors that accumulate in the ventilation system.
How long should the refrigerator sit after defrosting?
The recommended idle time with the doors open after the ice has melted is from 30 minutes to 1 hour. This is necessary for complete evaporation of moisture. Before loading food, the refrigerator must run empty for 1-2 hours.
Is it possible to defrost only the freezer in a two-compressor refrigerator?
Yes, this is the main advantage of two-compressor models. You can turn off the freezer thermostat (or turn off the corresponding compressor, if there is a separate button) while the refrigerator compartment continues to operate.
Why, after defrosting, does the refrigerator not turn on for a long time or does not freeze?
This may be due to residual moisture in the system, which has not yet dried, or to the thermal relay that protects the compressor. If after 3-4 hours of operation in empty mode the cold does not appear, there may be a failure or a freon leak.