Correct setting of the temperature regime is the foundation for long and trouble-free operation of any refrigeration equipment. In the case of the brand’s professional equipment Polair, proper climate control inside the chambers directly affects the safety of products and the energy efficiency of the device. Many users face difficulties during initial setup, not knowing how to interpret controller readings or adjust mechanical thermostats.
Errors in calibration can lead to inventory damage or, conversely, to unnecessary energy consumption due to the compressor operating under increased load. Understanding the principles of operation refrigeration units allows you not only to avoid these problems, but also to extend the life of expensive equipment. In this article, we will analyze in detail the algorithms of action for various models and control systems.
Modern refrigerators Polair are equipped with different types of automation, from simple mechanical regulators to complex microprocessor units. Regardless of the type of management, the goal remains the same - creating and maintaining optimal storage conditions. Next, we will look at step-by-step instructions that will help you quickly and accurately configure temperature mode in your device.
Features of Polair refrigerator control systems
Refrigeration equipment from this manufacturer is classified according to the type of installed control system, which dictates the configuration method. The most common models are c electronic controllers, which provide high accuracy in maintaining the specified parameters. Such systems are often found in medium-temperature cabinets and freezers of the new generation.
In simpler or older modifications, mechanical ones can be used thermostats. They represent a rotary mechanism where the temperature is set by conditional marks or divisions. Although electronics provide more opportunities for monitoring, mechanics are highly reliable and resistant to voltage surges in the network.
Systems with a digital display, where the user sees exact numerical values, deserve special attention. Here it is important to distinguish between the current temperature inside the chamber and the set target value. The digital controller allows you to set the exact threshold for turning on and off the compressor in steps of up to 0.1 degrees., which cannot be achieved mechanically.
Understanding the type of your control system is the first step to successful setup. If the front panel has a screen and buttons, you are dealing with electronics that require sequential command input. If there is only a rotary knob, the process comes down to empirical selection of the position of the regulator.
Setting a mechanical thermostat
Mechanical thermostats are usually located inside the refrigeration chamber or on the external panel in the form of a rotary knob with a scale. The scale can contain numbers from 1 to 7 or symbols like “Min” and “Max”.
For initial settings, it is recommended to set the knob to the middle position, for example, to the “3” or “4” mark. After this, you need to let the refrigerator run for several hours to stabilize temperature mode. Only after this can measurements be taken using an external thermometer.
⚠️ Attention: Do not turn the mechanical regulator knob sharply and with force. Inside there is a sensitive capillary tube, which can easily be damaged if handled carelessly, which will lead to refrigerant leakage and failure of the unit.
If after measurement it turns out that the temperature is higher than normal, turn the knob towards higher values. If food begins to freeze, reduce the intensity by turning the knob towards lower numbers. This process may take time, since the inertia of the system is large.
A common mistake is to set the regulator to maximum during the hot season. This forces the compressor to work without interruption, which leads to overheating and increased wear. The optimal setting is a balance in which the products are preserved, and the compressor has rest cycles.
Working with electronic controllers (Microprocessors)
Electronic control units, such as Carel, Dixell or our own development Polair, provide advanced functionality. Settings here are made through a menu, which is navigated using buttons. The first step is always to enter the parameter editing mode, which often requires holding a certain button for 3-5 seconds.
The following parameters are usually available in the user menu: setting the target temperature, setting the hysteresis (the difference in the on and off temperatures) and calibrating the sensor. Hysteresis is a critical parameter that determines how many degrees the temperature must rise for the compressor to turn on again after turn off.
To change the value, you must select the desired parameter, press the confirmation button (often indicated as “Set” or the image of a pen), change the number with arrows and confirm saving again. If no action is taken within a certain time (usually 10-15 seconds), the controller will automatically exit the menu, saving or canceling the changes.
☑️ Algorithm for setting up the electronic controller
Some models allow you to configure separate parameters for day and night mode, as well as set temperature thresholds for alarms. This is especially true for commercial use, where product control is strict. Errors in setting electronic unit can lead to incorrect display of data on the display.
Table of recommended temperature conditions
Correct setting is impossible without understanding exactly what values need to be set for different types of products. Below is a reference table that will help you navigate in choosing the optimal operating mode for your refrigerator Polair.
| Equipment type | Recommended range (°C) | Product type | Critical threshold (°C) |
|---|---|---|---|
| Medium temperature cabinet | +2.. +6 | Dairy products, gastronomy, drinks | +8 |
| Freezer compartment | -18.. -24 | Meat, fish, semi-finished products, ice | -12 |
| Vegetable chamber | +4.. +8 | Fresh vegetables, fruits, herbs | +10 |
| Blast freezer compartment | -35.. -40 | Deep-frozen products | -25 |
Compliance with these ranges guarantees food safety. Exceeding the upper temperature threshold in the medium-temperature chamber creates a favorable environment for the growth of bacteria. In freezers, an increase in temperature above a critical threshold can lead to defrosting and loss of presentation of the product.
It is worth considering that when the chamber is fully loaded with products, the temperature may rise more slowly, but it will also take longer to cool after opening the door. Therefore, when fully loaded, it makes sense to slightly (by 0.5-1 degrees) strengthen cooling mode.
Calibration and elimination of sensor errors
Over time, temperature sensors may produce errors, or their readings may not coincide with the actual state of the products. Electronic controllers have a calibration function that allows you to make adjustments to the readings without replacing the sensor itself. This setting is often referred to as "Offset" or "Adjustment".
To perform calibration, place the reference thermometer in the center of the chamber and wait until the temperature stabilizes. Compare the readings on the refrigerator display with the readings of a reference device. The difference must be entered into the controller settings menu with the appropriate sign (plus or minus).
⚠️ Attention: If the discrepancy between the display and reality exceeds 3-5 degrees, software calibration may not help. In this case, there is likely a malfunction of the temperature sensor temperature sensor itself
It is important to check the installation location of the sensor. On some models, it may become dislodged or accidentally hit when loading food. The sensor must be in the air flow, but not directly touching the products or chamber walls, so that the readings are representative of the entire volume.
What to do if the sensor shows an error?
If an error code (for example, P1, P2 or E1) is on the display, this indicates an open or short circuit in the sensor circuit. In this case, temperature adjustment is not possible until the element is replaced. Often the problem lies in the oxidation of the contacts at the junction of the sensor wire with the controller board.
Typical problems when setting the temperature
Even with the correct actions, users may encounter situations where the temperature does not hold or fluctuates. One of the common causes is a loose door seal. Warm air enters the chamber through the cracks, forcing compressor to work more intensely, but not achieving the desired values.
Another common problem is incorrect placement of products. If you have blocked the ventilation holes inside the chamber with cold air, the temperature sensor will read incorrect data. This will cause the compressor to turn off, considering the task completed, although it will be warm in other corners of the chamber.
Frequent opening of the door also makes its own adjustments. In commercial settings, where food is constantly accessible, it makes sense to set the temperature 1-2 degrees below normal to compensate for heat gain. However, you should not abuse this method so as not to overload the equipment.
If you notice that condensation appears on the products or, conversely, they begin to dry out, this is also a signal about the need to review the temperature regime or check operation of the defrost system. Incorrect setting of defrosting cycles can lead to temperature fluctuations throughout the day.
Frequently asked questions (FAQ)
Why does the Polair refrigerator not maintain the set temperature?
There may be several reasons: thermostat malfunction, refrigerant leak, compressor wear or malfunction chamber tightness. It is also worth checking whether the condenser is clogged with dust, which impairs heat transfer.
How often do you need to defrost a Polair refrigerator?
Models with the No Frost system do not require manual defrosting; preventative cleaning once every six months is sufficient. Drip systems and static refrigerators require defrosting as the ice crust builds up, usually once every 3-6 months.
What does a flashing temperature indicator on the display mean?
Flashing usually signals an alarm condition: the temperature inside the chamber is above or below set thresholds. This may be caused by prolonged opening of the door or a malfunction of the cooling system.
Is it possible to set the Polair refrigerator to a lower temperature than stated in the instructions?
Technically, you can change the controller settings, but operating the equipment outside the parameters recommended by the factory can lead to compressor failure and void the warranty.