Domestic refrigeration units series "Paracelsus" from the Pozis plant have earned a reputation as reliable and functional devices capable of ensuring long-term storage of products. However, for equipment to work correctly, it is not enough to simply plug it into the network; It is critical to set the temperature correctly to avoid spoilage of the contents or unnecessary stress on the compressor. Many owners encounter difficulties during initial calibration, not understanding how the numbers on the regulator relate to the real degrees inside the chambers.
In this article we will analyze in detail the process of setting the temperature in various modifications of refrigerators Posis Paracelsus, including models with electronic and mechanical control systems. You will learn about the nuances of the No Frost system, the features of cold distribution and methods for diagnosing faults if the specified mode is not supported. Proper setting will extend the life of the unit and save energy.
Optimal temperature conditions is not just a number on the display, but a balance between cooling efficiency and energy consumption. Incorrect settings can lead to the formation of ice, drying out of products or, conversely, to their rapid souring. Understanding the operating principles of a thermostat will help you avoid common operating errors.
Types of temperature control systems
Refrigerators Pozis Paracelsus series can be equipped with two types of control systems: mechanical and electronic. The mechanical regulator is a rotary switch located inside the refrigerator compartment, usually on the top wall or side. The scale of such a regulator contains numbers from 1 to 5 (or up to 7), where one corresponds to minimal cooling, and the maximum number to intense cold.
Electronic control is found in more modern models and requires a display on the outside of the door or inside the chamber. Here the user sees the exact values in degrees Celsius, which greatly simplifies the setup. Electronic module allows you to set separate modes for the refrigerator and freezer compartments, as well as activate special functions such as “Super Freeze” or “Holiday.”
⚠️ Attention: When switching from mechanical to electronic control (or vice versa), the operating logic may differ in different models. Always check the data sheet of a specific device, as the controller firmware may have unique features.
It is important to understand that even with an electronic display, the actual temperature inside the chamber may differ slightly from the displayed value due to the density of product loading or the frequency of door openings. Thermostat in mechanical models it reacts to changes in evaporator temperature, while electronics reads data from air sensors, which makes it more accurate, but also more sensitive to network failures.
Instructions for setting up a mechanical regulator
If your Pozis refrigerator is equipped with a rotary knob inside the chamber, the setting process requires an empirical approach, since the numbers on the scale do not correspond to degrees directly. First, you need to turn the knob to the middle position (usually number 3) and leave the unit to work without load for 5-6 hours. This will allow the system to reach a stable operating mode.
After the initial startup, it is recommended to use a household thermometer, placing it in a glass of water on the middle shelf. If after 24 hours the thermometer readings differ from the desired ones (for example, +4...+5°C), the position of the regulator should be adjusted. Turning clockwise enhances cooling, counterclockwise weakens it.
It is worth considering that mechanical thermostat has hysteresis, that is, the compressor turns on and off with a certain delay. Do not turn the handle too often and sharply; give the system time to stabilize after each change in position. The optimal position is considered to be one in which the compressor operates approximately 30-40% of the total time, alternating cycles of operation and rest.
☑️ Checking the mechanical settings
Setting up electronic control and display
In models with electronics, such as Pozis RK-139 or RK-168, setup is done through the control panel. Typically, to enter the setting mode, you need to press and hold the temperature adjustment button of the corresponding chamber for 3-5 seconds until the numbers on the display begin to flash. After this, use the “+” and “-” buttons to set the required value.
Digital controller allows you to set the exact temperature for the refrigerator compartment in the range from +2 to +10°C and for the freezer from -6 to -24°C. It is recommended to set +4°C for the refrigerator compartment and -18°C for the freezer. These values are the standard for long-term storage of most products and provide optimal load on the compressor.
Hidden electronic control functions
In some models, by simultaneously pressing the temperature adjustment buttons of both chambers, you can enter the service menu or activate the demonstration mode, however, it is better not to change the factory settings unnecessarily, so as not to disrupt the calibration of the sensors.
Please note that after changing the settings, the refrigerator may go into enhanced operation mode for several hours. This is normal for electronic system, which seeks to quickly compensate for temperature differences. If the display stops responding to presses, the child lock may have been activated, which can be removed by long pressing a special button with a picture of a lock.
Table of recommended temperature conditions
Different groups of products require different storage conditions. Understanding these nuances will help you distribute products on shelves correctly and adjust temperature conditions accordingly.
| Product type | Recommended temperature | Shelf life (approximate) | Placement area |
|---|---|---|---|
| Fresh meat and fish | 0...+2°C | 1-2 days | Bottom shelf / Freshness zone |
| Dairy products | +2...+4°C | 3-7 days | Middle shelves |
| Vegetables and fruits | +4...+8°C | 3-14 days | Bottom drawers |
| Ready meals | +2...+5°C | 1-3 days | Top shelves |
| Frozen foods | -18°C and below | up to 12 months | Frozen camera |
Use Freshness zones (if it is provided for by the design of your Posis Paracelsus) allows you to store perishable foods at a temperature close to 0°C, without freezing them. In this zone, products retain vitamins and taste much longer than in a regular compartment.
Special refrigerator operating modes
Modern models Pozis often equipped with the “Super Freeze” and “Vacation” functions. The “Super Freeze” mode forcibly turns on the compressor for continuous operation, ignoring the thermostat readings, which allows you to quickly freeze a large volume of fresh food without defrosting the stocks already in the chamber. It is not recommended to use this mode for longer than 24-48 hours to avoid engine overheating.
Vacation mode is designed to save energy when the owners are away for a long time. In this mode refrigerator compartment can be turned off or switched to economy mode (approx. +15°C) to prevent mold and odor while the freezer continues to operate normally, preserving frozen stocks.
Special modes are activated through the control panel. In mechanical models, an analogue of “Super Freeze” is the forced rotation of the regulator to the maximum, however, you will have to control the operating time in this mode yourself, using a timer or alarm clock.
Diagnostics of temperature problems
If you notice that the refrigerator Posis Paracelsus has stopped holding the temperature, first check the density door seal fit. A loose door is the most common cause of increased temperature inside the chambers. It is also worth making sure that the ventilation holes inside the chamber are not blocked by products, since air circulation is critical for uniform cooling.
In models with the No Frost system, freezing of the evaporator due to a malfunction of the defrost heating element or defrost sensor is a common problem. In this case, the cold stops flowing into the chamber, although the compressor can work continuously. A symptom may also be the presence of water under the refrigerator or at the bottom of the chamber.
⚠️ Attention: If the compressor runs non-stop and the temperature does not drop, or you hear an unusual noise, immediately unplug the appliance and contact a service center. Operation of a faulty unit can lead to failure of the compressor.
For diagnostics, you can listen to the operation of the unit. A uniform hum and periodic clicks of the relay are normal. A knocking, whistling or complete silence while the light inside is on may indicate serious technical problems that require specialist intervention.
Frequently asked questions (FAQ)
What temperature should I set in the Pozis refrigerator in the summer?
In the summer, when the ambient temperature in the room is high, the load on the refrigerator increases. It is recommended to set the mechanical type regulator to a slightly lower than average value (for example, 2.5 out of 5) to avoid overloading the compressor, but still monitor the temperature with a thermometer. In electronic models, you can leave the standard +4°C, but make sure that the refrigerator is not placed in direct sunlight.
Why is the temperature in the freezer -12°C instead of -18°C?
There may be several reasons: the door is not closed tightly, the ventilation ducts are clogged with ice (defrosting is required), or the sensor is faulty temperature. There may also be a decrease in compressor performance or a refrigerant leak. If after complete defrosting (24 hours) and checking the seals the problem persists, you need to call a technician.
Is it possible to adjust the temperature in each chamber separately?
Yes, in models Posis Paracelsus with electronic control and two compressors (or the Full No Frost system with independent circuits), the adjustment is made independently. In single-compressor models with mechanical control, the temperature in the freezer depends on the settings of the refrigerator compartment and the position of the damper.
What to do if the display shows error F or flashes?
Error codes (for example, F1, F2, etc.) indicate a malfunction of a specific sensor or node. The decoding of the codes is contained in the instructions for the specific model. Most often, flashing indicates an increase in the temperature in the chamber above the permissible threshold. Try defrosting the refrigerator and restarting it. If the error returns, diagnostics in the service are required.