The company "Vailant" is considered one of the most popular due to the variety of the range of heating equipment, as well as equipment for arranging hot water in a country house. Modern boilers of this manufacturer are considered one of the best. Thanks to German technology, these devices are able to work from gas supply. At the same time, there are both wall and floor models.
However, regardless of the quality of production of a device, it can fail. In this case, errors can be caused by breakdowns in the boiler itself or by the carelessness shown by the user. If we talk about heating boilers, then in this case error F28 may appear on the boiler “Vailant Turbo Tech” or any other model. Most often, such troubles are caused by improper operation of the unit. Let's consider this question in more detail.
Operation errors
Very often, improper actions of the owner of the equipment can lead to malfunctioning of the device. For example, a Fail gas boiler Vailant may give an error F28 due to improper use of the equipment.
To exclude such breakdowns, first of all, you need to remember that the units of this company are double-circuit. However, this does not mean that with their help it is possible to simultaneously produce heating and water heating. By default, the boiler settings state that it should work for heating. As soon as the hot water tap opens, the device automatically enters the heating mode. When the valve closes again, the unit switches to heating mode on its own.
If you try to configure it to work in 2 modes at the same time, it will inevitably lead to certain malfunctions, including error F28. The Vailant boiler is simply not designed for such forced labor.
Also, the causes of malfunctions can be malfunctions in the gas or electricity supply. In this case, it is necessary to call a specialist and check all the systems at home.
Useful Tips
In order not to puzzle over how to eliminate the F28 error in the Vailant gas boiler, carefully read the instructions before using the device. It is quite simple and intuitive even for a novice user. In addition, the device is equipped with a special display, which displays all the code symbols with the name of certain problems.
If any error occurs, it is necessary to clarify its number and read the annotation in the instructions. Some of the faults can be fixed on their own, but in most cases only specialized assistance may be required. To avoid trouble, before each heating season it is recommended to call a master who can check the boiler for leaks, as well as for high-quality performance.
Incorrect unit pressure is the most common cause of the F28 error in the Vailant gas boiler. What to do in this situation? First of all, experts recommend maintaining the pressure level on the middle gray strip of the sensor. If the arrow goes into the red zone, then this indicates that the indicator is very much reduced. This can seriously affect the operation of the system.
Adjustment Features
Boilers from this manufacturer are easy to operate. However, this does not mean that each person can independently cope with such a task. It is best to do the settings together, when one person will turn the tap and the other will track the position of the pressure arrow. To adjust the temperature of water or heating, you can use the special valves that are located on the control panel. At the same time, how hot the water will be displayed. Thanks to this, you can increase the temperature or lower it by turning the valve to the desired position.
Also, that it is time to figure out how to eliminate the F28 error in the Vailant boiler, special light sensors on the device panel can signal. The green light comes on when using heated water. A yellow indicator indicates that gas is burning. If the red LED lights up, then this indicates a malfunction in the system. It is also worth paying attention that only water is poured into the boiler. Experiments should not be set.
Installation Recommendations
The Fail gas boiler Vailant may issue error F28 due to incorrect installation of the unit. Therefore, the installation of the device must be coordinated with the gas distribution company.
It is also necessary to correctly determine in which hole in the wall the chimney will pass. Some parts of the construction of the house may be too strong and thick for such a technique.
When connecting the boiler for the first time, it is imperative to use a voltage stabilizer. It is important to monitor the polarity.
In order not to encounter the fact that the Vailant boiler generates an F28 error, it is necessary to make the connection correctly. It must be understood that only professional specialists will be able to perform this procedure in accordance with all requirements.
If the installation is carried out independently, then it is necessary to draw up a project for the heating system and certify it in the appropriate authorities. With independent or poor-quality installation, serious problems can arise.
Diagnostics
Error F28 appeared on the Vailant boiler, what should I do? First of all, when such malfunctions occur, do not immediately start to panic. Not everyone knows that absolutely every boiler from a German company is equipped with its own diagnostic system, which is part of the electronic unit.
All necessary data on the operation of the system can also be obtained on the liquid crystal display of the unit.
You can also make independent diagnostic measures. First you need to evaluate how operable the device is. For this, the outgoing and inlet connections are checked first of all. Make sure that the carbon monoxide, domestic hot water and condensate outlets are completely sealed. It is also necessary to pay attention that there are no serious pollution in the pressure reduction chamber.
The next step is to check all electrical wiring. To do this, make sure that the connectors and plugs are tightly “sitting” and not loose. Salt or limestone deposits may accumulate in the condensate drain and siphon, which may also affect the performance of the unit. In the event of such pollution, it is imperative to get rid of them.
Sometimes the gas burner of the unit becomes clogged with soot. In this case, it is necessary to clean it, as well as treat the inner walls of all the working chambers and the chimney.
Vailant boiler: F28 error
If we talk about this code, then it can indicate several malfunctions at once. For example, the cause of this phenomenon may be a failure of the gearbox, which is responsible for the gas pressure. Also, the counter could fail.
In some situations, the Vailant gas boiler generates error F28 when the gas is oversaturated with air. It is also necessary to monitor the pressure. In order to change these values, you need to check the settings yourself.
Some users accidentally close the gas valve, which may also cause an error. In addition, cable breaks often occur. A gas magnet may also fail. Additionally, you need to check the ignition transformer and make sure that there is no carbon deposits inside the system.
Least of all this error occurs when there is a breakdown in the control board. Therefore, regardless of whether the Vailant 24 kW boiler or another model gives an F28 error, it is recommended to check some nodes and make sure that the unit is operating in the correct mode.
Pressure check
This is another procedure that you can perform on your own in the event of a malfunction. In order to check the pressure, it is necessary to remove the casing of the unit. After that, you need to tilt the junction box and close the gas shut-off valve. The next step is to loosen the sealing screw located on the gas valve. After that, the digital pressure gauge is connected. Then you can open the gas shut-off valve and put the device into operation. After that, a pressure measurement is performed. If these manipulations did not help, then you can try other ways.
Check and adjust the minimum amount of gas
Particular care must be taken during the initial connection and commissioning of gas equipment. To check the minimum amount of gas and to avoid subsequent errors, it is necessary to perform several simple manipulations:
- turn off the boiler;
- loosen the sealing screw, which is located on the gas valve;
- connect a manometer;
- press the button with the plus symbol on the display and, holding it, set the “i” assignment switch;
- continue to hold “+” until “P.0” appears on the device’s screen;
- once again press the button with the “+” sign and wait for the appearance of “P.2”;
- press the “i” button and start the automatic diagnostic system, then the boiler can be switched to the minimum gas supply;
- press the “i” button and wait for the digital value from 0 to 99;
- press the “+” or minus button several times until the pressure is set to the correct value.
- save the changes, for this you need to hold the “i” button for about 5 seconds.
In this case, the unit will automatically exit diagnostic mode. After that, you can turn off the device, remove the pressure gauge and reinstall the sealing screw.
Checking the functioning of the boiler
And after the unit has been installed, it is also necessary to perform several manipulations that will make sure that the performance of the unit is at the right level. To do this, connect the device and check the gas supply lines, heating systems and other pipelines for leaks.
You must also make sure that the burner flame readings are in the correct position.
Features of heating
During the initial connection and the initial stages of operation of the unit, it is necessary to monitor all stages of its operation. In order to turn on the heating, it is necessary to activate the device and make sure that a request is displayed on the monitor, which indicates the supply of heat. After that, press the “i” button and pay attention to the status indicator. As soon as the request for heat supply “S.4” appears on the screen, this will indicate that the system is operating in the correct mode.
Finally
Most often this error is caused by incorrect operation of the unit. Therefore, do not rely on yourself. It is better to seek help from specialists.