Baxi boiler error E03. Causes of malfunction error e 03

“Baksi” is the name given to the line of gas boilers from the Italian company. If you are faced with the task of ensuring a comfortable microclimate in the room, then Baksi boilers are the best solution. The installations of this manufacturer have many advantages. The most important thing is that Baxi boilers are economical. In addition, they can be used for a long time and do not make noise during operation. These units perform well during use and are also easy to use. The reasonable price of this equipment makes it accessible to most consumers.

Operating principle

The manufacturer uses metal to make the Baxi combustion chamber. On the outside it is covered with a layer of heat insulation. Above it there is a heat exchanger, which is made of copper. When there is a change in temperature in the room, the thermostat turns on. Please note that the launch is carried out automatically. From it the signal to turn on is transmitted to the pump. The latter creates a vacuum in the return pipeline. After this, heated water begins to flow into the heating system line under a pressure not exceeding 0.45 bar.

The boiler starts at low power. It gradually increases until the temperature of the coolant increases to a given value. After this, the mode changes - from heating to modulation mode . When the coolant temperature decreases, a signal is received from the temperature sensor, which leads to the opening of the inlet valve. After this, ignition occurs, and then the water is heated again.

If already at the beginning of the boiler operation its power is quite high, then the burner is switched off automatically. After three minutes, you can restart the system.

If there is no need for heating the room, then the boiler is turned on in DHW mode. In this case, cold water enters the secondary circuit through a three-way valve, through which the heating line is closed. supplied to the burner through a gas valve , which leads to a gradual increase in boiler power. After heating the water, the temperature control mode is activated.

Types and causes of malfunctions

If the Baksi boiler has stopped working normally, then you can carry out repairs on your own, without turning to specialists for help. But troubleshooting can only be done if the damage is minor and easily fixable. If you have never encountered boiler repair, then in this case you should not take risks - contact a specialist straight away.

• the boiler burner does not turn on or goes out;
• it is impossible to light the boiler;
• when the boiler is operating, popping noises are heard in the combustion chamber;
• boiler overheating;
• max becomes insufficient. coolant heating temperature;
• when the equipment operates there is a lot of noise;
• One of the system sensors fails.

Causes of failure of Baksi boilers:

• moisture has entered the boiler;
• the quality of the coolant used is low;
• the gas pressure in the gas pipeline has decreased or a drop has occurred;
• there was a voltage drop in the electrical network;
• The installation of the heating system was carried out with errors.

Decoding

In the fault table of the instructions for the Baxi boiler regarding error E06 it says: the temperature sensor of the DHW circuit has failed, contact a service organization.

The code is generated by the electronic board, therefore, the measuring device is not the only cause of the problem. And if you consider that replacing it is not associated with difficulties, the user can remove the error E06 of the Baksi boiler on his own.

Error 06 on the Baxi boiler control panel

Frequent malfunctions and measures to eliminate them

The burner flame does not reach its maximum power when the boiler is operating.

This gas boiler malfunction may occur due to incorrect pressure settings in the heating system. Also, such a breakdown can occur if the gas valve modulator is faulty. Another reason for its occurrence is the breakdown of the diode bridge.

Remedy: it is necessary to configure the system parameters using the boiler operating instructions.

The boiler starts but immediately stops working

This gas boiler malfunction may occur due to low pressure in the gas pipeline.

Remedy: it is necessary to adjust the gas pressure down to 5 mbar.

Weak heating of the coolant in the heating system

Remedy: Check the pressure at the gas valve. There is a high probability that there was a failure in the min and max values.

Modulation mode does not work

To eliminate the problem, the valve must be replaced.

Temperature sensor values ​​become inaccurate

To resolve this problem, replace the old sensor with a new one.

Weak heating in the hot water supply system

The cause of this malfunction may be incomplete opening of the three-way valve. In some cases, its appearance is associated with a breakdown of such a valve. To accurately establish that the cause of the malfunction lies precisely in the valve , you need to wait some time until the system cools down. Then the shut-off valves of the heating system will need to be closed. When this is done, the boiler should be turned on to hot water supply mode. Confirmation of a valve malfunction will be heating in the heating system.

When the unit is ignited, “popping” noises are heard.

Noise can appear for several reasons:

• Insufficient gas pressure;
• Changed distance from the gas supply to the igniter due to careless transportation of the Baksi boiler.

To eliminate this malfunction, you should adjust the gap size. It should be set within 4–5 mm.

How to adjust the gap between the burner and the igniter

To make the correct adjustment on a Baxi gas boiler, you need to open the front panel and completely remove it from the boiler. After this, it is necessary to remove the damper from the inspection hole of the installation. Behind it you can find an igniter. To change the gap size, unscrew the screw that secures the ignition electrode to the boiler. Next, it is removed, and then carefully bent. Then you need to install it in its original place, and then close the damper.

The most common causes of errors during operation

Malfunctions of Baksi wall-mounted gas boilers with one working circuit will affect exclusively the heating system. Moreover, electronics break down more often, because mechanical parts are made of durable metal, which undergoes additional processing and hardening. As a result, it can last for many decades without even showing visible signs of wear.

When cleaning the combustion chamber, you need to remove the naga very carefully so as not to damage the protective inner layer. If this happens, the wear rate will increase many times and the boiler will not be able to work for the entire announced period of time. You should behave in the same way when cleaning the burner. The diameter of the tool should be smaller than the holes so that they do not become loose, otherwise the device will become unusable and will have to be replaced.

Malfunctions of Baksi double-circuit gas boilers will already affect both the heating and water heating systems. There are many more options for breakdowns here, since the system is more complex than a single-circuit model. Diagnostics can take more time, and repair work is much more difficult. So in this matter, it would be better to trust the professionals so that they take on all the troubles themselves.

To avoid breakdowns and extend the life of the unit, you need to correctly configure the Baxi gas heating boiler. This is quite easy to do if you use the practical recommendations from the instructions. In addition, the “smart” automatic control system itself will prompt the user with the optimal parameters that are best suited for his system. In general, you need to carefully monitor the automation readings, as they can tell you about impending problems. Timely diagnosis increases the chances of success.

Errors and their codes

Error codes that may occur during the operation of Baksi gas boilers can be divided into two groups:

• complete blocking of equipment operation;
• switching the device to standby mode.

If the installation is completely blocked, you will need to restart the boiler manually. The blocking is activated if serious problems occur in the boiler operation, which can pose a serious danger to human health. Failures that cause the boiler to block include overheating of the equipment, and in addition, lack of draft. Blocking also occurs if there is no gas supply. The error resolves itself in rare cases. If this happens, the device starts in automatic mode.

Error E01

This error is the most common. When the flame control sensor is triggered, this code is displayed. Several reasons can lead to its appearance:

• no gas supply;
• there is no correspondence between phase and zero; this reason is relevant for phase-dependent models;
• no contact with flame sensor;
• the sensor is dirty or faulty;
• there are malfunctions in the ignition system;
• the gas valve is faulty or the electronic board is faulty;
• air access is insufficient for normal combustion;
• The gas pressure in the system is insufficient.

If this code appears on the display, then the first thing to do is check whether the sensor is connected correctly. It is also worth checking the gas supply. If everything is normal, then in this case you can press R. It should be held for 3 seconds.

If accidentally triggered, the equipment will continue to operate normally. If the error continues to appear, then in this case you should contact a specialist . Note that the occurrence of this error is associated with problems in the electronics. If you try to solve the problem on your own, then everything can end disastrously for gas equipment.

Error E10

Another common mistake is E10. The main reason for its occurrence is sensors that monitor the operation of pumps and monitor water circulation. This error may appear on the unit display in the following cases:

• the coolant pressure in the system has decreased;
• there is no contact between the board and the pressure switch;
• pressure switch is faulty;
• the pump operation sensor has become faulty;
• there are malfunctions in the pump;
• heat exchanger clogged.

If this error occurs, you should not try to fix it yourself. Self-repair is acceptable if the pump needs to be replaced. Carrying out this event will not be difficult. You can also clean the filters without assistance. All other work related to the repair of the Baksi boiler should be performed by an experienced specialist.

Errors E96, E97, E98

Urgent repairs by a qualified specialist are required if the gas boiler display shows errors E96, E97, E98. If they occur, it is unacceptable for the owner of the equipment to interfere with the operation of the boiler. The prohibition on intervention in the event of these errors is due to the fact that these three codes appear when the electronic board has become faulty.

Error e03 in a Baxi gas boiler due to a faulty draft sensor

The draft sensor is a gray box that is connected to the fan by tubes. In the normal state, the contacts are open, but close when a vacuum appears, which is created in the outlet pipe. If there is no vacuum or it is insufficient, then the boiler stops and it will not be possible to start it.

In order to eliminate a malfunction of the pneumatic relay, you can perform the following actions: when the equipment is started, the fan begins to operate, after which a signal to the control unit should close the contacts of the pressure switch relay, therefore, you can close them yourself to simulate operation. If in this case ignition occurs, then it is necessary to look for another reason. For example, in connection with a discharge pipe or sensor.

To check the operation of the relay inside the sensor, create a vacuum using the supply tube by making a characteristic click. The pneumatic relay has two outputs. One of them remains open, and a tube is connected to the other. The connection must be made correctly.

If the boiler does not turn on when necessary

You open the mixer tap, but the boiler does not react and does not try to ignite the burner, and no errors occur. Regardless of the operation scheme of the boiler’s DHW circuit, a sensor is installed on the outlet pipeline, which detects that water collection has begun. It is also called a DHW flow sensor. Sensors come in different types: some simply detect the presence of water movement in the pipeline, others can quantitatively measure flow. The latter are used to provide greater comfort due to precise control of the burner power depending on the flow rate.

In both cases, when water flow begins, a signal must be sent from this sensor to the control board. If for some reason this does not happen, the boiler will be inactive.

The sensor type is most easily determined by the number of contacts. Two means it is a closing microswitch. Three – sensor with flow meter.

Error e03. Checking chimneys.

First of all, it is necessary to carry out a visual inspection of the chimneys. It happens that the head of a coaxial chimney at the outlet can be equipped with a fine mesh to prevent the entry of large objects. In winter, when conditions are created for the formation of frost and this mesh is covered with frost so that air intake completely stops.

The rules clearly stipulate how chimney pipes should be installed for different building options. Incorrect installation of chimneys (for example, lack of slope or too long pipe sections) can lead to boiler shutdown under certain weather conditions.

The formation of ice or icicles is not a rare occurrence; ideally, when designing the boiler installation site, even the wind rose of a particular region should be taken into account.

If we are talking about the summer period, then the reason for the “narrowing” of chimneys may be spiders making webs or birds making nests. Here, I think everything is clear.

Carefully inspect the intake pipe and the air outlet pipe, if there are no obstacles there, you can proceed to consider the following possible causes of error e03 baxi.

Sensor diagnostics

If the flow sensor is a microswitch, then for diagnostics it is enough to check the contact closure with a tester. To do this, disconnect the contacts from the sensor, connect the tester in “dialing” mode, and turn on the water tap. If a short circuit does not occur, it means that the sensor is faulty and requires inspection and, if necessary, replacement. It happens that accumulated dirt interferes with the circuit and it is enough to clean it. Poor quality of tap water and lack of pre-filters are the most common problem. Reed sensors contain a magnet, so they attract microparticles of rust and quickly fail.

Sensors with a flow meter record the amount of water flow, which can usually be displayed on the boiler display. For BAXI boilers you need:

hold the “i” button to access the information menu for 5 seconds

Use the DHW temperature adjustment buttons to scroll to parameter A08 (actual flow rate of water passing through the sensor, liters per minute * 10)

Now all that remains is to compare the actual water flow from the tap with the flow according to the sensor. If the actual flow rate does not correspond to the sensor value, then most likely it needs to be replaced.

Since the mechanical part of the flow sensor is a turbine, if it gets dirty, it can jam and the signal from the sensor disappears. There is no signal from the flow sensor - the boiler stops heating water.

The error does not clear

Sometimes users and specialists who carry out diagnostics cannot reset the error and conclude that the control unit is faulty. The main reasons why the error may not be reset:

the error cannot be reset until the fault has been eliminated (for example, lack of pressure in the boiler)

poor contact between the reset button and the control board (often seen on Vaillant TEC boilers)

the reset order is broken (in some cases you need to hold Reset for a certain time)

A malfunction of the information board (display board) is rare, but possible.

At the same time, when the user’s board is changed, everything works because there is no error on it. Everything will work until the next error appears, and if the reason is not figured out, they will replace a working board every time.

From practice, we often received serviceable units for repair that simply had not cleared the error. It is often impossible to convince (especially specialists) that there is a possibility of a problem with the error reset. “We know everything, we can do everything, 20 years of experience - we checked everything, the error does not reset - the control board is faulty!”

Three-way valve

A three-way valve is installed in boilers with two heat exchangers. When a signal is received from the flow sensor, the electronics gives a signal to the valve and the heated water from the first heat exchanger is sent to the second heat exchanger, where the heat is transferred to the passing tap water. If, for example, no actual switching occurs (the valve is faulty), then the coolant will continue to circulate in the heating circuit and no heat transfer to the hot water circuit will occur.

If, for example, a valve only partially closes the heating circuit due to a malfunction, then there will be problems with insufficient heating of hot water, since part of the heat will go to the heating system.

Modulation errors on the burner

To heat running water, in most cases a boiler power close to maximum is required. In modern boilers, the burner power is regulated over a wide range. The adjustment occurs by changing the amount of gas supplied by the gas valve. The amount of adjustment is determined by the control board depending on the operating logic and settings. The process can be observed visually by the height of the flames on the burner.

If the boiler settings are set to 100% boiler power in DHW mode, but visually the flames on the burner are weak, or obvious interruptions are visible, then you should check:

setting the gas valve (static and dynamic gas pressure)

Such checks should only be performed by a qualified person.

Temperature sensor malfunction

The boiler determines the actual hot water temperature based on the readings of the temperature sensor. Therefore, if for some reason it receives incorrect readings, the boiler may not operate correctly in the hot water preparation mode. The temperature sensor is a thermistor with resistance depending on temperature. Testing such a sensor consists of measuring its resistance at a known temperature. Baxi boilers are equipped with NTC sensors with an inverse dependence of resistance on temperature. At room temperature, the sensor resistance should be approximately 10 kOhm, at a temperature of 45 degrees 4.3 kOhm.

Heat exchanger clogged (reduced throughput)

Often the fouling of the internal walls of the heat exchanger with scale or mud deposits is the cause of problems with hot water. If tap water does not undergo pre-filtration (rough cleaning) and the temperature of the hot water is too high, the walls of the heat exchanger become overgrown with scale and dirt over time, reducing their thermal conductivity and flow area. Each time the user increases the DHW temperature on the boiler more and more in order to obtain the desired result on the mixer. As the temperature rises, scale forms even faster and, as a result, the temperature of the boiler's hot water supply is at its maximum, and the water does not heat up enough. This process has a particularly negative effect on a boiler with a bithermic heat exchanger. Plate heat exchangers are easy to clean.

BAXI error E 03. Condensation in tubes

Another option for the occurrence of error E03 on the boiler is

is condensate, which under certain conditions can accumulate in the tube. It can either get on the relay itself, or simply affect the amount of vacuum and prevent the relay from operating.

Boilers of a later production date are equipped with either special extensions to collect condensate or insulated tubes to prevent its formation. If you see drops of liquid, you can remove the tube and blow it out.

Control board errors

The control board should be considered as the cause of hot water problems when all other checks have failed. The cause may be a malfunction in the flame modulation circuit. The boiler control unit constantly adjusts the burner power depending on the conditions, and if there is a fault on the board, the boiler can spontaneously reboot or turn off when it reaches maximum power, which in most cases is required precisely in the hot water preparation mode.

It is also possible that boards may be configured incorrectly as errors. But this only applies to those cases where problems appeared after its replacement. BAXI boards are universal and require customization for a specific boiler.

Gas boilers are designed to create comfortable living conditions. Double-circuit units provide the living space with heat and hot water at the tap. But it happens that a working boiler does not heat the water well and does not provide the necessary comfort.

How to check the fan operation in a Baxi turbocharged boiler

In order to check the quality of the fan operation, it is necessary to remove the front cover. You should first check whether the device rotates. If the fan does not rotate, then you need to turn off the gas boiler and try to turn the blades yourself. This way, you can eliminate the possibility of jamming and check how freely they rotate. Rotation must be carried out without interference or extraneous sounds.

Usually the following problems occur: dirt builds up on the internal blades, the lubricant in the fan axle bearings runs out, or the axle bushing wears out.

In Baxi ecofour gas boilers, you can remove the fan along with the top cover of the combustion chamber. If necessary, clean the turbine blades from dirt. The bearing can be lubricated with a special high-temperature grease. If the fan operates for a long time with dirt on the blades, the axle bushing may break. In this case, it needs to be replaced.

If the gas boiler is working, but the fan does not start, then you need to check the reliability of the connection of the device to the board and the presence of voltage at the terminals. One of the common causes is a malfunction of the relay on the board, which is responsible for turning on the turbine. In such a situation, an internal board error is detected by the diagnostic system. If no faults were found, then you can move on to the next step.

Baxi gas boilers have a special black outlet, which is located at the fan outlet, for service specialists. The vacuum created can be measured with a special device. This value should be 45 mbar.

How does a boiler work?

To understand the situation more clearly, you need to understand the principle of operation of the boiler. Double-circuit gas wall-mounted boilers such as Baksi or Ariston consist of several components. In the gas part, the incoming fuel is burned, the water part ensures the supply of heated water from the heat exchangers to the heating system, and the smoke removal part is responsible for removing combustion products outside the home.

Depending on the user settings, temperature sensors adjust the water heating mode. A sensor on the return pipeline turns off the boiler, depending on the achievement of the required temperature set for the return. However, the system pump does not stop running until the heat exchanger temperature drops.

This is provided to prevent the water from boiling in it. As soon as the coolant cools down to the maximum level, the electronics will send a signal to turn on water pumping and the gas valve. The whole process will start again. When you open the tap in the mixer in a double-circuit boiler, a flow sensor reacts, which informs the electronics about the need to switch the three-way valve to the mode of heating water for DHW.

When the hot water tap is turned off, it returns to heating mode. Some manufacturers provide heating for both heat exchangers during periodic switching.

How to reset a gas boiler error?

First of all, you need to read the instructions - information on how to correctly reset the error and the reason for the error is indicated there. Some errors simply cannot be reset until the problem is fixed. Example: lack of water in the boiler. Until the pressure sensor (or pressure switch) registers the required value, the error will not go away, it is useless to reset it - you need to recharge the boiler, the automation will record this and the error will disappear on its own.

Another example: the boiler failed to ignite (E01 on BAXI, F28 on Vaillant, 501 on Ariston). The process of igniting the boiler is associated with a sequence of actions. In most cases, the order is as follows: the circulation pump starts (the presence of circulation is registered by sensors), the fan starts, the presence of draft is determined, the gas valve opens and voltage is supplied to the ignition transformer - a spark hits the burner. Relatively speaking, in the presence of air, gas and sparks, the boiler will ignite. That is, the point is that the ignition process itself consists of several operations that can be controlled visually. And in this case, the boiler automation cannot determine whether the fault has been fixed or not on its own. That is, the user must first figure it out, eliminate the cause of the malfunction, and then give the command for the next startup attempt. In this case, this is what happens using the reset button.

This is a very important point to understand: if the error belongs to a category that is reset by reset, then after the reset, another ignition attempt will MUST occur, which will be accompanied by the activation of the actuators.

The second important point to understand: errors that require a reset button are not reset by turning the boiler off/on. This depends on the specific control unit! You need to study the instructions. Often control units remember a critical error and a power reset will do nothing!

The boiler does not heat water for heating

So, let's look at the main reasons why a gas boiler does not heat water for the heating system and what to do about it:

• airlock. It is necessary to inspect the heating system for the presence of air in the radiators. To eliminate this problem, you need to install an air vent. Its operating principle is similar to that of an expansion tank, but it is capable of maintaining pressure in the system. Using an air vent, you need to bleed air from the system. It is important to inspect the valve itself for mechanical blockages - scale may be present there;
• corrosion in radiators. Clogging of heating devices can be determined by draining water from the system. If the water flows dirty, then you need to flush the system until visually clean water appears;
• connection errors. Hot water may not flow if the diameter of the pipes is not as specified in the project or instructions. It is necessary to check the compliance of the pipeline, the correct connection and the quality of installation of shut-off valves;
• insufficient pressure in the network. You should try adding water to the heating system, as there may not be enough pressure to trigger the automatic ignition of the burner;
• presence of scale in the heat exchanger. The first sign is prolonged heating of the coolant and heating of the batteries. It is necessary to get rid of sediments and carry out boiler water treatment. To do this, you need to disassemble the boiler and remove the heat exchanger assembly.

Before doing this, you need to shut off the flow of gas and water to the device. Then flexible connectors from the pump are connected to the heat exchanger and it is washed with a composition containing a special cleaning agent, which can be purchased over the counter. After which the parts are washed with water.

Some manufacturers allow the use of antifreeze instead of water in the heating system. This substance can be used in the following boilers: “Baxi”, “Vaillant”, “Proterm”, “Beretta”, “Korea Star”. However, it should be understood that each manufacturer recommends using its own antifreeze;

• filter clogging. If the filter screens are clogged with mechanical debris, the radiators may also have poor heating. Therefore, the filter should be checked and cleaned regularly by rinsing with water. If clogging occurs too often, then such a part must be replaced;
• incorrect setting. First of all, if there is weak or no heating, you need to check the settings of the control unit. The temperature may be set insufficiently and the gas does not heat the water;
• malfunctions of pumping equipment. If the pump power is not enough to ensure good circulation, it may turn off if it overheats. This can happen when the DHW circuit is turned on;
• incorrectly selected heating devices. If the system has radiators with unsuitable heat transfer and design parameters, this can also lead to low heating;
• incorrect slope of pipelines. Most often this problem occurs in systems with natural circulation. Regulatory documentation specifies that the slope of pipes should be 10 mm per meter of pipe. If these requirements are not met, circulation may be disrupted and, as a result, there may be no heating due to low coolant flow.

Why the boiler does not heat well and does not reach temperature

No hot water? For what reasons does the equipment not work? Sometimes it's a matter of external factors. Let's take a closer look.

The device works, but does not heat or heats poorly

Airlock. Check to see if air has accumulated in the batteries. Use taps to remove excess air. If you don't have an air vent on your radiators, then you need to install one. By adjusting its tap, you can release the accumulated air in the system.

Also inspect the valve for blockages. Most often it becomes clogged with scale.

Clogged radiators . After cooling, drain the water from the pipes. If it is very dirty, run it through the batteries until it comes out clean.

Incorrect connection . If there is no hot flow, make sure that the diameter of the pipes corresponds to those stated in the instructions. Are the hoses connected correctly and the shut-off valves installed?

Low pressure in the line . It is not enough to open the valve and ignite the burner. Add water.

Scale accumulation in the heat exchanger. You may notice that the equipment takes a long time to heat up the liquid, and the batteries heat up slightly. Clean the radiator tubes from deposits. To do this, it is better to remove the unit, but this cannot be done in all models. Therefore, remove the casing and disconnect the device from gas and water. Connect the tubes from the pump to the heat exchanger and circulate the cleaning liquid through the system. Special products can be selected in the store. Then rinse the parts with running water.

Adding reagents to the coolant fluid helps reduce the formation of salts on parts.

When purchasing, it is important to pay attention to the brand and model of the boiler. For example, Electrolux, Arderia, Ariston, Buderus prohibit the use of the reagent. It is recommended to install cleaning filters or use distilled water.

Antifreeze can be applied to Baxi, Beretta, Vailant, Proterm, Celtic, and Korea Star models. But a separate reagent is produced for each manufacturer.

Filter clogged . Another reason for poor battery warm-up. The mesh filter becomes clogged with small debris, so it is periodically removed and cleaned under running water. If the part is severely clogged or worn, it is better to replace it.