Effective temperature management in brand commercial equipment Polair is a critical parameter for maintaining the presentation of products and complying with sanitary standards. Incorrect settings can lead to inventory spoilage or, conversely, to excess energy consumption due to the compressor running idle. Owners of shops and catering outlets need to clearly understand the difference between setting up refrigerated cabinets and freezers, since the operating logic of their controllers is significantly different.
Modern units are equipped with electronic control units that allow you to set parameters with an accuracy of a degree, but the interface of these devices often raises questions among beginners. Controller is the “brain” of the system, which reads sensor readings and makes a decision to turn the compressor on or off. Understanding the principles of its operation will help you avoid common mistakes and extend the life of your equipment.
In this article we will analyze in detail the setting algorithms for various series of equipment, explain the meaning of the display and provide a table of recommended values for different groups of products. Proper calibration of equipment is the first step to a stable business without losses.
Principles of operation of the Polair electronic controller
The basis of the thermoregulation system is an electronic unit that continuously monitors the temperature inside the chamber. For this purpose, it is used thermal sensor, attached to the evaporator or in a special pocket inside the chamber. The controller compares the current readings with a specified threshold value and, based on the difference, activates the cooling circuit.
It is important to understand that the air temperature in the chamber and the temperature of the product are different quantities. Polair designs its systems taking into account the inertia of cooling. Therefore, the controller has built-in delays and hysteresis (the difference between the switch-on and switch-off temperatures) to prevent the compressor from starting too often. Frequent engine starts are harmful to its life.
The front panel usually contains LED indicators or a digital display, as well as one or two control buttons. Pressing the button can perform different functions depending on the duration: a short press often changes the display mode, and a long press (3-5 seconds) puts the device into programming mode. It is critically important not to confuse the mode for displaying the current temperature with the mode for setting the settings.
Setting up refrigerated cabinets (DM, ShH series)
Refrigerated cabinets are designed for storing food at positive temperatures, usually in the range from 0 to +10 degrees Celsius. Setting up the controller in such models (for example, series DM or SH) is done by holding down a single control button. When entering the setting mode, a flashing indicator or symbol indicating the parameter lights up on the display.
First, the target temperature is set (Set Point). This is the value to which the chamber will cool before stopping the compressor. After setting this parameter, by briefly pressing the button, you can proceed to setting other values, such as temperature difference or emergency mode alarm. Changes are saved automatically a few seconds after the last press or forcefully.
Refrigerators are characterized by a wider hysteresis than freezers to avoid condensation and freezing of food. If you set the temperature too low, the food at the entrance may freeze, and if it is high, it will quickly spoil.
- 🌡️ The optimal range for dairy products is from +2 to +4 degrees.
- 🥩 For meat gastronomy, it is recommended to keep the temperature from 0 to +3 degrees.
- 🥤 Drinks and canned food can be stored at temperatures up to +8...+10 degrees.
Adjustment of chest freezers and cabinets (CM, ShN series)
Freezing equipment requires more precise and strict settings, since even a short-term increase in temperature above -12 degrees can trigger irreversible processes in frozen products. In freezers Polair (series CM, ShN), the algorithm for entering the menu is often similar to refrigerators, but the range of values is shifted to the negative area.
When setting up the freezer, it is necessary to take into account the thickness of the layer of food and the frequency of opening the doors. If the door opens frequently, it is advisable to set the temperature 2-3 degrees below the target, creating a “temperature cushion”. However, it should be remembered that deep freezing requires more energy.
Particular attention should be paid to the defrosting indicator. In some models, when the temperature rises above critical, a special symbol lights up. This is a signal that the products may have been defrosted and their quality is at risk. In this case, it is necessary to check the tightness of the door closure and the operation of the seals.
⚠️ Attention: When setting up the freezer, avoid setting the temperature below -24...-25 degrees unless absolutely necessary. This leads to a significant waste of electricity and increased load on the compressor, without providing significant advantages for storing most products.
Table of recommended temperature conditions
To properly configure the equipment, it is important to focus not on abstract numbers, but on the requirements for stored products. Different groups of goods have their own standards product neighborhood and temperature conditions. Below is a reference table that will help you set the optimal values on the controller of your Polair.
| Product type | Recommended temperature (°C) | Maximum shelf life | Type Polair equipment |
|---|---|---|---|
| Fresh meat (chilled) | from 0 to +2 | 2-3 days | Refrigerator |
| Dairy products | from +2 to +4 | up to 5 days | Refrigerated display case |
| Frozen fish | from -18 to -22 | up to 6 months | Chest freezer |
| Vegetables and fruits | from +4 to +8 | 3-7 days | Refrigerator compartment |
| Semi-finished products (freezing) | from -18 to -20 | up to 3 months | Freezer |
Deciphering error codes and indications
Refrigerator electronics Polair is capable of independently diagnosing many faults and reporting them to the user through the display or blinking indicators. Understanding these signals allows you to quickly respond to problems before they lead to food spoilage.
Most often, users encounter a high temperature indication. If the corresponding symbol lights up or flashes on the screen, this means that the actual temperature in the chamber is higher than the established norm. This may happen immediately after loading warm food, but if the situation does not return to normal after a few hours, a check is required.
There are also error codes related to sensors. For example, a flashing indicator may indicate an open circuit in the sensor or a short circuit. In such cases, the controller goes into emergency operation mode, starting the compressor at time intervals in order to somehow maintain the cold.
- ❄️ "Snowflake" indicator - the active cooling process is in progress (the compressor is working).
- 💧 "Drop" indicator - the evaporator defrost process is in progress (for systems No Frost).
- ⚠️ Flashing thermometer - the temperature in the chamber is above the established norm.
What to do if the emergency indicator is on?
If the high temperature indicator is constantly on, check the door seal, the presence of food in the air flow path, and the cleanliness of the condenser. If after 2-3 hours of operation without opening the door, the temperature has not decreased, there may be a refrigerant leak or a compressor malfunction.
Seasonal adjustment and the influence of external factors
Adjusting the temperature in the refrigerator Polair is not a one-time procedure. External conditions, such as room temperature, humidity and seasonality, directly affect the operating efficiency of the equipment. In the summer, when the room is hot, heat inflows increase, and the compressor has to work harder.
In winter, if the room is not heated well enough, the opposite problem may occur. Some refrigerator models are not designed to operate at ambient temperatures below +10 degrees. Under such conditions, the oil in the compressor thickens, which can lead to its breakdown during startup.
It is necessary to regularly check the settings. If you notice that food in the depths of the chamber begins to freeze or, conversely, quickly deteriorates, check the current readings on the display. The settings may have gone wrong or the sensor needs to be calibrated.
⚠️ Attention: Technical characteristics and interfaces of the controllers may vary depending on the year of manufacture and the specific modification of the equipment. Always check the product data sheet or the latest information on the manufacturer’s official website before making complex changes to the settings.
☑️ Monthly temperature check
Frequently asked questions (FAQ)
Why does the Polair refrigerator not maintain the set temperature?
There may be several reasons: a violation of the seal of the chamber (wear of seals), contamination of the condenser with dust, a malfunction of the temperature sensor or a refrigerant leak. Also check if the products are loaded close to the back wall, blocking the air circulation.
How to enter the service menu to calibrate the sensor?
In most models, to enter the advanced menu you need to hold the setup button for more than 10 seconds or use a combination of buttons. However, calibration of sensors (Calibration) is recommended to be carried out only by specialists using certified equipment, since an error of 1-2 degrees can spoil the products.
Is it possible to use a household extension cord for a Polair refrigerator?
The use of extension cords is not recommended, especially if it is of poor quality or has insufficient wire section. This can lead to a voltage drop at the start of the compressor, which causes overheating of the windings and motor failure. Connect the equipment directly to a working outlet.
What does flashing of all indicators mean at the same time?
Most often this is a signal of a critical malfunction, for example, an open circuit of the temperature sensor or a problem with the control board. In this mode, the controller can block the start of the compressor to avoid an accident. Diagnostics by a specialist is required.
Is it necessary to defrost a Polair refrigerator with the No Frost system?
The system No Frost automatically removes moisture, so complete defrosting to remove ice is not required. However, sanitary defrosting and washing of the chamber is necessary at least 1-2 times a year to maintain hygiene and remove odors.