Modern two-chamber models of refrigeration equipment, in particular the popular series from the Belarusian manufacturer Atlant, are often equipped with two independent cooling circuits. This system involves the presence of two separate compressors: one is responsible for the freezer compartment, and the second serves the refrigeration compartment. This allows you to more accurately regulate temperature conditions and save energy when operating one of the chambers. However, during operation, users may encounter a situation where it is necessary to turn off one of the units, most often the upper or lower compressor, to diagnose a malfunction or as a temporary measure in case of a breakdown.
The question of how to turn off the 2nd compressor on an Atlant refrigerator arises not only during repairs, but also in domestic conditions, when it is necessary to reduce the noise level or check the performance of the system. It is important to understand that tampering with an electrical circuit requires strict adherence to safety rules and a clear understanding of the structure of your model. Incorrect actions can lead to failure electronic control module or damage to the compressor itself. In this article we will analyze in detail the algorithm of actions, technical nuances and possible consequences of such manipulations.
The principle of operation of the Atlant two-compressor system
The two-compressor circuit in refrigerators Atlant is implemented to ensure complete independence of temperature zones. Unlike single-circuit systems, where one motor drives the refrigerant throughout the entire volume, here each compressor has its own evaporator, condenser and thermostat. This means that turning off one unit should not theoretically affect the operation of another if the electronics or mechanical switches are working properly. Refrigerant circulates in a closed circuit without mixing between chambers.
The operation of the motors can be controlled mechanically or electronically. In mechanical models, separate thermostats located inside the chambers are responsible for turning them on and off. In more modern versions with electronic control, all processes are coordinated ny module, which receives signals from temperature sensors. Understanding the control type of your model Atlant is critical before starting any shutdown work.
What is the difference between No Frost and a drip system in two-compressor models?
In two-compressor Atlant refrigerators, the defrosting system can be combined. Often the freezer compartment (bottom compressor) uses a No Frost system with a fan, and the refrigerator compartment (top compressor) uses a drip system (Direct Cool). Turning off the No Frost compressor will stop air circulation and rapid ice formation, even if the motor itself is working.
It is worth noting that some models may have a common heat removal system, but separate cooling circuits. When diagnosing, it is important not to confuse the pipes and electrical leads. Condenser can be common or separate, which affects the heat dissipation when one compressor is operating.
Diagnostics before turning off the compressor
Before proceeding with the physical switching off the second compressor, you need to make sure that this action is appropriate. Often, users try to turn off the unit, assuming it is broken, although the problem may lie in the thermostat or start relay. Primary diagnostics will help to avoid unnecessary manipulations with serviceable components. If the Atlant refrigerator is noisy or does not hold the temperature, first check the following parameters:
- 🔍 Thermostat state: check if it clicks when you change the position of the handle or if it rings with a multimeter.
- ⚡ Operation of the starting relay: often it is this small element that causes the compressor to refuse to start or, conversely, prevents it from turning off.
- 🌡️ Temperature mode: make sure that the sensors do not show false values, causing the compressor to idle.
For accurate diagnosis you will need multimeter. With its help, you can check the integrity of the motor windings and the presence of voltage at the terminals. If, when connected to the network, the compressor hums, but does not start, and the relay is working properly, there is a high probability of jamming of the piston group. In this case, turning off the second compressor may be a temporary solution, allowing you to use one of the chambers until you purchase new equipment.
It is important to distinguish between situations when the compressor does not turn on at all, and when it works continuously. In the first case, the problem is often electrical, in the second - a freon leak or a violation of thermal insulation. Disabling a serviceable but constantly running compressor without eliminating the cause of the leak will not solve the problem, but will only preserve the malfunction.
Technical methods for disabling the second unit
There are several methods for disabling the second compressor in refrigerators Atlant. The choice of method depends on your end goal: temporary diagnostics, permanent operation on one compressor, or control circuit testing. The simplest and safest way is to turn off through a thermostat or electronic unit, if the design allows you to isolate the power circuit of a particular motor.
In mechanical models, shutdown is often done by breaking the power supply circuit of the thermostat of the corresponding chamber. To do this, you need to remove the back cover of the refrigerator (or access the technical compartment) and find the terminal block. The wires going to starting relay the second compressor are carefully disconnected and isolated. It is important not to damage the insulation of adjacent wires, so as not to cause a short circuit.
⚠️ Attention: Before any work on the electrical part of the Atlant refrigerator, be sure to disconnect the device from the network! Working under 220V voltage is deadly. Capacitors in the starting circuit can retain a charge even after being turned off.
If we are talking about electronic control, the process is more complicated. This may require tampering with the control board or physically disconnecting the wire from the board to the compressor relay. In some cases, craftsmen install an additional toggle switch in the power supply circuit of the second compressor, bringing it outside the housing for convenient control. This allows you to turn on the second chamber only when necessary.
☑️ Checklist for preparing for shutdown
When disconnecting after electronic module be careful: accidental shorting of the contacts on the board can damage the entire control system, after which the refrigerator will stop working completely. If you are not confident in your skills in working with electronics, it is better to limit yourself to a mechanical break in the circuit at the level of the compressor terminals.
Step-by-step instructions for safe shutdown
To perform work to disconnect the second compressor, you will need a standard set of tools: Phillips and flat-head screwdrivers, pliers, insulating tape or heat shrink, and a marker for marking wires. The process should be performed sequentially so as not to compromise the integrity of other refrigerator systems Atlant.
- Disconnect the power to the refrigerator by unplugging the plug from the socket. Move the unit away from the wall to access the rear wall.
- Remove the protective metal or plastic cover covering the compressors. It is usually secured with screws or snaps.
- Determine which compressor needs to be turned off (upper or lower). Usually they are marked or differ in the length of the tubes.
- Find an electrical block that fits the start relay of the selected compressor. Take a photo of the connection so you can return it.
- Disconnect the power wires (usually phase and neutral coming from the thermostat or board) from the relay terminals or the compressor itself.
- Carefully insulate the cut ends of the wires or use terminal strips. Make sure that the insulation is reliable.
- Plug in the refrigerator and check the operation of the remaining compressor.
During operation, pay attention to the condition of the wires. If the insulation on older models is cracked, replace the section of wire or completely re-insulate it. Remove carefully so as not to damage the contacts. After disconnecting one motor, the second should start normally if its circuit has not been affected. Atlant cracked, replace the section of wire or completely re-insulate it. Start relay remove carefully so as not to damage the contacts. After turning off one motor, the second should start normally if its circuit has not been affected.
After assembling all the elements, check the stability of the refrigerator. Make sure that the compressors do not touch the housing or tubes, since the vibration of a running motor can cause rattling or damage to copper pipelines.
Nuances of working with electronic control
Modern Atlant refrigerators with a system Smart Control or similar electronic units require a special approach. In such devices, compressors are not controlled directly by thermostats, but through power relays on the board. A simple disconnection of the wire can be perceived by the system as an error (sensor break or circuit malfunction), which will lead to the refrigerator going into emergency mode or permanent indication of a malfunction on the display.
In some models, turning off one compressor is not possible in software without flashing the module, which is extremely difficult to do at home. Physically turning off the motor can cause the board to continue to send a signal to turn on, trying to heat the windings, which in rare cases can lead to overheating of the control board elements. Therefore, for electronics the safest method is to install an external switch in the break of the supply wire to the control board, if the circuit allows it, or use a load simulator.
| Control type | Disconnection method | Risks | Complexity |
|---|---|---|---|
| Mechanical (thermostats) | Open thermostat circuit | Minimal | Low |
| Electronic (board) | Disconnection at relay terminals | System error, fault code | Average |
| Inverter | Not recommended | Inverter failure | High |
| Hybrid | Depends on the model | Average | Average |
If on the display of your refrigerator Atlant after manipulations the fault indicator lights up (a rapidly flashing red indicator or error code), this is a signal that the system has detected a lack of load or a temperature discrepancy. In such cases, you may need to completely reset the settings or contact a service center to correct the operating parameters.
Consequences of operation on one compressor
Using a two-chamber Atlant refrigerator with one operating compressor has its own characteristics. First of all, you lose the ability to independently adjust the temperature in one of the chambers. If the freezer compressor is turned off, the food in the freezer will begin to defrost. If the compressor of the refrigeration compartment is turned off, the temperature there will rise to room temperature, which will lead to spoilage of food.
However, there are also positive aspects. Running just one unit reduces the overall noise level and power consumption by about half (although the remaining motor may run longer, trying to compensate for the heat gain through the partition). The load on the electrical grid is also reduced. This can be useful in the country or during periods when the full functionality of the refrigerator is not required.
⚠️ Attention: When one compressor is operating, the partition between the chambers may freeze or, conversely, heat up more than usual due to an imbalance in the heat balance. Monitor the condition of the seals and the door of the adjacent chamber.
Long-term operation in this mode is acceptable, but requires monitoring. Make sure that the running compressor does not overheat. If it is forced to work continuously, trying to cool the volume intended for two motors (due to heat exchange through the wall), its life may be reduced. In this case, it is recommended to periodically give the equipment a rest or use saving modes, if they are provided for by the design.
Frequently asked questions (FAQ)
Is it possible to permanently leave the Atlant refrigerator with one compressor?
Technically this is possible, and many users have been operating the equipment in this mode for years. However, you must understand that one of the cameras will no longer perform its functions. If the freezer is disabled, it will simply become an additional cupboard. The main thing is to ensure reliable insulation of the disconnected wires.
Why did the refrigerator begin to hum louder after the second compressor was turned off?
This may be due to a change in the resonant frequencies of the housing or the vibration of the tubes, which previously vibrated in antiphase with the two running motors. Also check that the tubes are not touching each other or the housing. It may be necessary to secure them with clamps or lay vibration-insulating material.
Does shutting down one compressor affect energy consumption?
Yes, consumption is reduced, but not exactly by half. The remaining compressor may turn on more often or run longer, especially if the insulation between chambers is not ideal. However, the overall energy balance will be positive compared to the operation of two motors.
How to understand which compressor is not working in a two-compressor Atlanta?
Put your hand on the compressor housing (be careful, they may be hot). A running motor vibrates and heats up. Not working - cold and quiet. You can also listen: the characteristic hum and clicks of the relay will indicate the active unit. If both are silent, but the light is on, the problem is in the power circuit or thermostats.