Single-door refrigerated cabinets of the brand Polair are the reliability standard in the HoReCa segment, ensuring the safety of products under intensive use conditions. Proper temperature settings are not just a matter of comfort, but are critical to maintaining sanitary standards and extending the life of equipment. Owners of restaurants and shops need to clearly understand the logic of the controller in order to avoid inventory spoilage or compressor failure.
Modern models, such as the DM or SHseries, are equipped with microprocessor controllers that require precise calibration. Errors during initial startup or after defrosting can cause the unit to operate in an inefficient cycle, creating excess load on compressor. Below we will analyze the algorithm of actions that will allow you to set the optimal parameters in a few minutes.
It is important to consider that industrial equipment is sensitive to environmental conditions. If the cabinet is installed in a hot or drafty workshop, the factory default settings may require adjustment. Ignoring this fact often causes the formation of a “fur coat” on the evaporator or, conversely, insufficient cooling.
⚠️ Attention: Before starting any manipulations with the settings, make sure that the door is tightly closed and the seal is not damaged. Any temperature adjustment is carried out with the chamber closed so that the sensors read the real indicators of the internal environment, and not the warm air from the room.
Control interface and main elements
The control panel of single-door refrigerators Polair usually located in the upper part of the internal or external wall cameras. It consists of a digital display and several function buttons. The central place is occupied by the current temperature indicator, which in operating mode displays the degrees inside the chamber. Understanding the purpose of each button is the key to successful setup.
The main elements of the interface are buttons for switching modes, adjusting values, and turning on/off. On some models, for example, with controllers Evco or Dixell, there may be a separate button to enter the parameters menu. Pressing the setup button often puts the device into editing mode, which is indicated by the blinking of the corresponding indicator on the screen.
- 🔹 Set/Menu button — used to enter the settings menu and confirm the selected values.
- 🔹 Buttons with arrows (Up/Down) —used to change the numerical temperature readings.
- 🔹 Indicators —LEDs indicating compressor operation, defrosting mode or emergency situation.
It is worth noting that the visual design of the panel may vary depending on the year of manufacture of the model. However, the interaction logic remains the same for most industrial units. If this is your first time encountering this equipment, it is recommended that you first familiarize yourself with the labeling of the buttons so as not to accidentally reset the factory settings.
Step-by-step instructions: how to set the temperature
The process of setting the temperature in a single-door cabinet Polair requires sequential steps. First you need to unlock the control panel if such a function is activated (usually by holding down a button combination for a long time). Once unlocked, press the settings button. The display will flash to show the current temperature set point.
Use the arrow buttons to change the value to the desired level. For storing perishable products (meat, fish, dairy products), the optimal range is considered to be from +2°C to +6°C. If you store drinks or vegetables, the temperature can be raised to +8°C... +10°C, which will reduce energy consumption.
☑️ Temperature setting checklist
After selecting the desired parameter, press the confirmation button again. The numbers will stop flashing and the controller will record the new setting. It is important to understand that the temperature change on the display does not occur instantly. The compressor takes time to cool or warm the air in the chamber to a new level. This process usually takes from 30 minutes to 2 hours depending on the cabinet load.
⚠️ Attention: Do not set the temperature to the lowest possible temperature (for example, 0°C or lower) unless absolutely necessary. Working at the limit of capacity leads to freezing of the evaporator and frequent defrost cycles, which critically reduces the resource of the refrigeration unit.
In some cases, especially after loading a large volume of warm products, a temporary decrease in temperature may be required to quickly reach the operating mode. However, after the process has stabilized, be sure to return the settings to standard values.
Table of recommended temperature conditions
To effectively use the equipment, it is important to know which temperature ranges are suitable for different groups of products. The wrong choice of mode can lead to rapid spoilage of stocks or, conversely, to their freezing. Below is a reference table for typical foods stored in single-door refrigerators.
| Product Type | Recommended Temperature | Max. shelf life (approx.) |
|---|---|---|
| Meat and meat products | +2°C ... +4°C | 3-5 days |
| Fish and seafood | 0°C ... +2°C | 2-3 days |
| Dairy products | +2°C ... +6°C | 5-7 days |
| Vegetables and fruits | +6°C ... +10°C | 7-14 days |
| Ready meals (Gastronorm) | +2°C ... +6°C | 24-48 hours |
Please note that shelf life is indicated for products of good quality and subject to proper packaging. Open containers of prepared food require stricter temperature control. In such cases, it is recommended to use temperature probes to check inside the product, and not just by air in the chamber.
Why does the temperature in the table differ from the factory one?
The factory setting is often +5°C as an average. However, this may be a lot for fish, but not enough for cabbage. Adjustment for a specific type of load is a sign of professional operation.
Using this table will help you optimize the operation of the equipment. For example, if you only store drinks, there is no point in keeping the temperature at +2°C, which will force the compressor to work almost without interruption.
Advanced settings and controller parameters
Advanced controller settings are available for experienced users and service specialists. This menu is usually entered by long pressing the setup button (more than 5-7 seconds). Here you can change the hysteresis (the difference between switching on and off temperatures), defrosting intervals and the type of defrosting.
Parameter Hysteresis (differential) determines how many degrees the temperature must rise for the compressor to turn on again. The factory value is usually 2-3°C. Reducing this value will lead to more frequent starts of the compressor, which is undesirable for the electrical network and the unit itself. The increase will create large temperature fluctuations inside the chamber.
- 🔸 Defrosting interval (Idt) — sets the time between defrost cycles (for example, every 6 hours).
- 🔸 Duration of defrosting (Mdt) —the maximum operating time of the heating element or stopping the compressor for defrost.
- 🔸 Fan turn-on delay —time after stopping the compressor, after which the evaporator fan will stop.
Changing these parameters unnecessarily is not recommended. Factory settings Polair already optimized for most climatic conditions. Interfering with the operation of defrosting algorithms can lead to the fact that the evaporator will not have time to defrost, and the cooling efficiency will drop sharply.
Diagnostics of problems and error codes
Modern refrigerators Polair are equipped with a self-diagnosis system. When a malfunction occurs, error codes appear on the display to help you quickly identify the problem. The most common errors are related to temperature sensors. For example, flashing of the indicator or the appearance of the symbols “E1”, “E2” indicates a short circuit or open circuit of the sensor.
If you see an error code, first check the integrity of the wires going to the sensor. Sometimes the problem lies in oxidation of the contacts or mechanical damage to the wire when loading products. Errors associated with overheating of the compressor or a malfunction of the control board are also possible.
⚠️ Attention: If an error code appears indicating a sensor malfunction, do not try to operate the refrigerator in normal mode. The controller may go into an emergency operation cycle, which will lead to defrosting of products or freezing of the chamber.
To reset the error, it is often enough to disconnect the device from the power supply for 10-15 minutes and turn it on again. If the error recurs, the faulty element must be replaced. In complex cases, when codes indicate problems with the board, it is better to contact a service center.
Operating rules for a stable temperature
Even a perfectly tuned refrigerator will not work efficiently if the operating rules are violated. To ensure that the temperature inside the single-door cabinet Polair always corresponds to the set temperature, it is necessary to monitor the loading of the chamber. Products should not block the openings of the air ducts through which cold air circulates inside.
Regular defrosting (if the model is not equipped with a No Frost system) also affects temperature stability. The layer of ice on the evaporator acts as a heat insulator, interfering with cooling. As a result, the compressor runs longer, and the temperature in the chamber may rise, despite the correct controller settings.
In addition, it is important to monitor the condition of the door seals. If the rubber has lost its elasticity or is dirty, warm, moist air will enter the chamber. This will not only increase the temperature, but will also lead to the formation of condensation and ice. Regularly washing the seals with warm water and a mild detergent will help maintain their properties.
How to check the tightness of the door?
Take a sheet of paper, clamp it with the door around the perimeter and try to pull it out. If the sheet is pulled out too easily without resistance, it means that the seal does not fit tightly and requires adjustment or replacement.
Following these simple rules will allow your equipment to serve for many years without serious breakdowns. Remember that prevention is always cheaper than repairs, especially when it comes to commercial equipment, the downtime of which can stop the operation of the entire enterprise.
Why does not the Polair refrigerator keep the set temperature?
There may be several reasons: the door is not closed tightly, the condenser is dirty (radiator at the back), the temperature sensor is faulty or the compressor has lost performance. Also check whether the cabinet is too close to the wall, which interferes with air circulation.
How often should you defrost a single-door refrigerator?
The frequency depends on the humidity in the room and the intensity of the door opening. On average, industrial refrigerators Polair require defrosting 1-2 times a month, or when the thickness of the ice on the walls exceeds 3-5 mm. Models with automatic defrosting do this themselves using a timer.
Is it possible to install a Polair refrigerator in an unheated room?
Most models are designed to operate in the SN-T climate class (from +10°C to +43°C). Operation at temperatures below +10°C can lead to solidification of the oil in the compressor and its breakdown. For unheated warehouses, special modifications are required.
What to do if the red emergency temperature indicator is on?
This is a signal that the temperature in the chamber is higher than permissible. Check that the door is tightly closed, that the cabinet is not overloaded with warm food, and that the thermostat settings are not lost. If after an hour of operation the indicator does not go out, call a technician.