Correct temperature settings are the foundation for the correct operation of any refrigeration equipment. In commercial cabinets of the brand Polair this process requires a careful approach, since the safety of products and the service life of the compressor directly depend on it. Incorrectly set parameters can lead to damage to the goods or, conversely, to excessive energy consumption due to the system running idle. That is why business owners and catering employees need to clearly understand the logic of the automation.
In most cases, users encounter difficulties when starting up for the first time or after defrosting the equipment. Digital controllers installed on equipment have wide functionality, but their interface is not always intuitive at first glance. It is important to distinguish between models with mechanical regulators and modern electronic systems, since the algorithm of actions for them is radically different. Below we will analyze all the nuances of the settings so that you can be sure of the stability of the cold.
Features of the Polair control system
Refrigeration cabinets Polair are equipped with various types of automation, which often causes confusion among inexperienced users. The main difference lies in the type of controller installed: these can be simple thermostats with a rotary knob or complex microprocessor units with a digital display. In professional lines, controllers of the Polus, Evco or Dixellseries are most often found. Understanding which unit is in front of you is the first step to successful setup.
Electronic controllers allow you to set not only the target temperature, but also the delta (the difference between the temperatures when the compressor turns on and off), as well as adjust the intervals and duration of defrost. Mechanical thermostats they work on the principle of opening the circuit when a certain point is reached, and their calibration is less accurate. If the front panel of your cabinet has a digital screen and buttons, we are talking about precise electronic settings that require a sequence of clicks.
It is worth considering that factory settings are often averaged. They may not take into account the specifics of your room, how often doors are opened, or the temperature of the food being loaded. Therefore, manual adjustment of parameters is normal practice for adapting equipment to real operating conditions. Ignoring this step may result in the refrigerator operating at the limit of its capabilities.
⚠️ Attention: Before starting any manipulations with the settings, make sure that the cabinet door is tightly closed and there are no foreign objects inside that block the temperature sensors. Otherwise, the readings may be incorrect.
Setting a mechanical thermostat
In budget models of refrigerators Polair or in older series, mechanical thermostats are still used. They are a rotary switch, usually located inside the camera or on an external panel. There are no thermometers in the usual sense on the scale of such a regulator; instead of numbers, divisions are marked there from minimum to maximum or symbols are used (for example, from 1 to 7 or from Min to Max). Understanding the operating logic of this unit is critical to preventing food from defrosting.
The principle of operation is simple: by turning the knob clockwise, you increase the degree of cooling. However, this does not mean directly setting the temperature in degrees Celsius. Position "3" or "4" usually corresponds to the average value recommended by the manufacturer for normal conditions. If you turn the knob all the way to the maximum, the compressor will work almost without stopping, which can lead to overheating and freezing of the evaporator.
To accurately set the temperature when using mechanics, it is recommended to use an external thermometer. Place it in a glass of water in the center of the chamber and leave it for several hours. Depending on the readings, adjust the position of the handle. This method takes time, but it is the only correct one for equipment without a digital display. Precise calibration in this case, it is a process of trial and error, extended over time.
- 🌡️ Find the regulator inside the camera, usually it is combined with the lighting lamp.
- ⚙️ Set the knob to the middle position (often indicated by a green sector or number 3-4).
- ⏳ Wait 3-4 hours for the temperature to stabilize.
- 📏 Check the temperature with an external thermometer and turn the knob if necessary.
Working with Polus and Evco controllers
Modern refrigerators Polair are most often equipped with microprocessor controllers, such as Polus (our own development) or universal Evco. These devices allow you to control the temperature with an accuracy of tenths of a degree. The interface of such blocks usually consists of a digital indicator and three or four control buttons. To change the setpoint, you must enter programming mode, which prevents personnel from accidentally changing the settings.
The setup process usually begins with a short press of the set button (often indicated as Set or a degree symbol). The display flashes the current target temperature. Using the up and down arrow buttons, you set the required value. After confirmation (pressing again Set or waiting for a timeout), the controller remembers the parameter and begins to work out the new mode. It is important not to confuse the compressor switch-on setpoint and the switch-off temperature.
In some modifications of controllers Polus there is a division into a user level and a service settings level. The user can only change the target temperature, while the defrost and delta parameters are hidden behind a security code. This is done for security so that incompetent actions do not disrupt the system’s operation algorithms. If you need to change exactly the basic storage temperature, a deep dive into the service menu is not required.
☑️ Polus/Evco setting algorithm
Pay attention to the status indication. If the snowflake or compressor icon is on, this means that the cooling process is active. If the thermometer icon flashes or an error code appears (for example, E1, E2), this indicates a sensor malfunction. In this case, setting the temperature is impossible until the technical problem is resolved. Error diagnosis must precede any setting.
Table of recommended temperature conditions
The choice of the correct temperature depends on the type of stored products. There is no universal value for “everything”, and trying to average indicators can lead to losses. Below is a table that will help you navigate the settings for various product groups. Compliance with these standards guarantees maximum shelf life.
| Product type | Recommended temperature (°C) | Permissible range | Storage features |
|---|---|---|---|
| Dairy products | +2...+4 | +1...+6 | Requires a stable regime, afraid of changes |
| Semi-finished meat products | 0...+2 | -1...+3 | Critical low temperature to suppress bacteria |
| Vegetables and fruits | +4...+8 | +3...+10 | Needs higher humidity and temperature. mode |
| Confectionery | +2...+6 | +1...+8 | It is important to avoid freezing of creams and glazes |
| Gastronomy (ready) | +1...+4 | 0...+5 | Strict control to avoid spoilage |
When loading the cabinet With a large volume of warm products, it makes sense to temporarily reduce the setpoint by 1-2 degrees below normal. This will help you pass the crystallization point faster and cool the mass. However, after stabilizing the temperature inside the chamber, be sure to return the settings to standard values. Long-term operation at low temperatures is harmful for most products not intended for freezing.
⚠️ Attention: Do not set the temperature below 0°C in refrigerators (not freezers) for foods with high water content. This will lead to rupture of cellular structures, loss of presentation and taste after defrosting.
Adjustment of delta and hysteresis
One of the key parameters affecting the efficiency of the refrigerator Polairis delta (hysteresis). This parameter determines the difference between the start and stop temperatures of the compressor. For example, if the target temperature is set to +4°C and the delta is 3 degrees, the compressor will turn off at +4°C and turn on again when the temperature rises to +7°C. Understanding this mechanism allows you to optimize the operation of the equipment.
Too small a delta (for example, 1 degree) will cause the compressor to turn on and off very often. This phenomenon, known as “clocking,” has an extremely negative effect on the service life of the starting equipment and the engine itself. Too large a delta (5-6 degrees) will lead to significant temperature fluctuations inside the chamber, which is unacceptable for storing perishable goods. Optimal delta usually 2-4 degrees, but can vary depending on the controller model.
Changing this parameter requires entering the service menu. In controllers Evco or Dixell this is often done by long pressing the setting button (more than 5-7 seconds) until the parameter code appears (for example, dF or SE). Next, we search through the differential parameter. It is better not to change the factory values unless necessary, as they were selected by engineers to balance energy efficiency and product safety.
- 🔧 Enter the service menu by long pressing the Set button.
- 📉 The differential parameter is often designated as
dIF,HYorSE. - ⚖️ The factory value is usually in the range of 2-4 degrees Celsius.
- 🔄 Changing the delta affects the frequency of compressor switching cycles.
Frequent problems during setup and their solutions
Even if you follow the instructions, users may encounter situations when the refrigerator Polair does not maintain the set temperature or behaves incorrectly. One of the common problems is temperature “loss”. If you set +4°C, but the device shows +8°C and does not turn off, the reason may not be in the settings, but in a loose fit of the door seal or contamination of the condenser. Maintenance This should always be preceded by a deep reconfiguration of the electronics.
Other common situation - sensor frosting. If the sensor is covered with a “coat” of ice, it begins to display the temperature of the ice (about 0°C or lower), even if the chamber is warm. The controller, seeing the low temperature, does not turn on the compressor, and the food spoils. In this case, it is necessary to defrost the cabinet and check the position of the sensor. It must be in the air flow, but not directly touch the products or walls.
The controller itself may also malfunction after power surges in the network. Electronics Polair are sensitive to power quality. If the display is on, but the buttons do not respond or the readings are chaotic, try performing a hard reset by unplugging the device for 10-15 minutes. This action resets the microprocessor and often clears software errors.
⚠️ Attention: If the temperature problem persists after resetting and checking the seals, there is likely a refrigerant leak or a bad thermostat. In this case, independent temperature adjustment is useless and you need to call a specialist.
Prevention and maintenance of automation
In order for the temperature control system in the refrigerator Polair to work flawlessly for many years, it is not enough just to set the parameters once. Regular maintenance helps avoid sudden breakdowns. First of all, this concerns cleaning the condenser (the grille at the back or bottom of the cabinet). A condenser clogged with dust impairs heat transfer, the compressor overheats and cannot gain the required pressure, as a result of which the temperature in the chamber rises and the automation wears out.
It is also important to monitor the condition of the door seals. If the gum becomes dry or dirty, warm air constantly enters the chamber. The controller will attempt to compensate for the heat by operating in continuous mode. You can check the tightness of the fit using a sheet of paper: hold it with the door and try to pull it out. If the sheet is removed too easily, the seal requires replacement or adjustment of the hinges. Chamber tightness is the key to a stable temperature.
Do not forget to periodically check the readings of the built-in display using an external verified thermometer. Electronic sensors may exhibit slight errors (drift) over time. Identifying discrepancies early will allow you to adjust settings or replace the sensor before products are impacted. Keeping a temperature log is an excellent habit for any food service establishment.
In conclusion, it is worth noting that proper operation of refrigeration equipment is a combination of correct initial settings and regular maintenance. Don't be afraid to experiment with the settings within reason to find the ideal setting for your conditions. Remember that each product has its own requirements, and the flexibility of the control system Polair allows you to satisfy them all.
Is it possible to install a Polair refrigerator close to the wall?
No, for normal operation of the condenser, a gap of at least 10-15 cm is required from the back wall of the cabinet to the wall of the room. Violation of this rule will lead to overheating of the compressor and incorrect operation of the temperature automation.
What to do if, after setting, the temperature does not change within an hour?
Check whether the door is open and whether the cabinet is loaded with warm food. Also make sure that the compressor indicator light is on. If the compressor is humming, but there is no cold for a long time, it may take time to reach the mode or there is a technical malfunction.
How to reset the Polair controller settings to factory settings?
Usually, you need to hold down two buttons at the same time (for example, Set and down arrow) for 5-10 seconds, or find the "Factory Reset" parameter in the service menu. The exact combination depends on the controller model (Polus TC 110, Evco, etc.).
Why is the Polair refrigerator very cold even at minimum?
This may indicate sticking of the thermostat contacts (in mechanics) or a malfunction of the relay in the electronic unit, which is why the compressor does not receive a signal to turn off. Also, the reason may be the incorrect location of the temperature sensor.