Gas boiler errors "Ariston": decoding fault codes and repair manual

Failure of heating system units usually occurs at the most inopportune moment. At first glance, a gas boiler is a very complex device that can only be repaired by a trained gas service technician with experience, knowledge and manufacturer accreditations.

However, to quickly identify the cause, it is not necessary to study to become a gas technician. If an error occurs with an Ariston gas boiler, the system recognizes the problem and displays a fault code on the screen. In most cases, you can find a malfunction and adjust the heating yourself.

We will tell you how to promptly identify the maturation or occurrence of a breakdown. In the article we present you will find decoding of the codes and tips for correcting the situation. Our recommendations will be useful to those who decide to repair equipment with their own hands.

The pressure in the boiler increases

When the pressure in a double-circuit gas boiler drops, this is somehow understandable, but when the pressure itself increases!
What could it be? However, this is exactly what I had to face one day. This was discovered thanks to a safety relief valve. He began to release the pressure by spitting water from the boiler. The pressure gauge showed a pressure exceeding 3 bar. First of all, I relieved the pressure in the heating system through the Mayevsky valve, and began to observe the readings of the pressure gauge; the pressure was slowly but surely growing. My first thought was that the water supply valve began to leak, tightened it, nothing changed. Then I took out the boiler maintenance manual (the manual can be downloaded here) and began looking at the hydraulic diagram, and quite quickly realized that the reason was in the secondary heat exchanger.

So there are two reasons why the pressure in the boiler can gradually but constantly increase: 1) The feed tap does not hold. 2) The secondary heat exchanger is faulty

Code 109

The error appears when the system pressure is critically high (more than 3 bar). This is possible in the following cases:

Excess fluid in the system.
Airy batteries.

The problem can be solved by forcibly draining some of the water from the heating system, as well as bleeding air from all existing batteries.

Problems starting with the number 2 appear only in those models that have two circuits working for heating and water heating.

What does Ariston boiler repair include?

Repair of Ariston boilers includes the following types of work:

cleaning/washing the heat exchanger using special products;
replacing and cleaning injectors;
restoration or replacement of controllers, sensors, pressure gauges, thermostats, thermometers;
installation and configuration of control units;
carrying out commissioning operations;
checking the functioning of the coolant and electrical connections;
setting up automation and alarm systems, etc.

We will promptly arrive at the site, inspect the equipment and calculate the estimate. Employees will replace any faulty spare parts with original parts.

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The instructions for heating installations with a self-diagnosis function contain a table of faults with code designations and a brief explanation. There is little information, and the recommendations end with the words: contact specialists. This is of little use, although the user can fix a number of problems on his own. The article explains in clear language the meaning of error 6p1 Ariston and gives practical advice on solving the problem that has arisen with the boiler.

How to proceed

Restarting the Ariston boiler, which is recommended to do to eliminate errors, is not practiced with code 601 - it will not give any results. Considering that there are two “suspects”, to save time, you should start with diagnosing the smoke exhaust duct. To get to the thermostat, you need to remove the unit casing, and the likelihood of the device breaking is low.

Increase air flow

In practice, increasing the efficiency of natural ventilation in a room with an Ariston boiler removes error 601. It does not take much time to swing the door open - such a simple action increases draft and eliminates the problem.
If there is a powerful exhaust device running in the adjacent room, not far from Ariston, turn it off. Error 601 will be removed. The manufacturer specifically stipulates that the operation of units of this class near atmospheric boilers is prohibited.
Clean the heat exchanger housing. If, after a long period of inactivity and operation of the Ariston boiler, it becomes overgrown with dust and soot, the natural circulation of air masses decreases, the draft drops, and error 601 appears.

Clean your Ariston boiler

Check the chimney

Littering of the channel (leaves, dirt, cobwebs), icing of the tip are the reasons for the decrease in draft and error 601 of the Ariston boiler. It is easy to identify visually. It is enough to go outside and look at the cut of the chimney pipe. The formation of ice and a layer of frost is immediately visible. To check the “cleanliness” of the channel, you need to remove the first elbow. If the chimney is clogged, cleaning it will not take much time.

Coaxial chimney with protection from the external environment

Advice

Flue gas exhaust system in an Ariston boiler

The manufacturer's instructions indicate the standard requirements: length, cross-section, slope angle, installation location of the condensate collector, number of turns. Error 601 often appears when setting up a channel independently, unprofessionally. Miscalculations will have to be corrected.
Periodic equipment failure due to poor draft is caused by an ill-designed chimney laying diagram. If the wind rose is not taken into account and the proper measures are not taken, the Ariston boiler simply blows out in gusts. Hence the error 601. You need to cover the head, and the problem will be solved.
Checking traction using a flame (candles, lighters, matches), which is recommended on a number of thematic sites, often gives a false result. If there is a deviation, a fluctuation of the “light”, then whether this is enough for the chimney thermostat to work correctly is a big question.

Test the sensor

At a critically high temperature in the chimney, the thermostat is triggered, cutting off the supply of “blue fuel” to the burner of the Ariston boiler.

Temperature sensor for Ariston boiler

Air supply and flue gas removal (errors 6**)

The system for supplying air and removing flue gases generated during the operation of a gas boiler can be natural or forced. Therefore, some errors may not occur for different devices. But we'll look at them all.

Error No. 601. The draft thermostat is triggered when the contact is broken or the smoke exhaust thermostat is internally damaged. It is also possible that the air vent system is clogged.

Error No. 602. The same thing, only for VMC type combustion chambers.

Error No. 604. The Hall sensor is faulty (it needs to be replaced) or the speed of the fan blades is low (it needs to be cleaned or also replaced).

Error No. 607. The contacts of the controlling pneumatic relay were closed before the fan turned on. This detail confirms that there is sufficient draft before ignition. To eliminate early closure, you need to carefully remove the pneumatic relay and blow out its tubes, removing dirt or condensation. If this does not help, the part will have to be replaced.

The air relay is connected to the exhaust chamber with a silicone tube. Sometimes there is a condensate trap there. If the problem is with the pressure switch, then first you need to check the integrity of the tube

Error No. 610. Thermal fuse contacts are open. This part needs to be replaced.

Error No. 612. Same as error No. 604, but on early Ariston models.

Decoding

The practice of operating Ariston boilers shows that error 502 often appears when starting up the unit after a long period of inactivity in an unheated (damp) room or as a result of a severe thunderstorm. Informs that the automatic control of the burner operation is detected when the valve regulating the gas supply is closed (false, stray flame).

Error 502 on the Ariston boiler display

There are several reasons why error 502 appears on the Ariston boiler display, so there can be no clear recommendation for troubleshooting. Based on his own experience and analysis of user correspondence on thematic forums, the author advises adhering to the following algorithm of actions. The conditions for placing the heating unit, the model, and the specifics of operation at each facility are different, so it is worth taking all opinions into account. Some hint will certainly help remove error 502 from the Ariston boiler.

Conclusion:

Taking into account the cost of the Ariston boiler, it is not advisable to take excessive initiative in identifying and eliminating the flame separation error on your own. Everything that is recommended for the user to check and perform is indicated in the article. There is no result - call a representative of the service organization.

Practical advice

A one-time visit from a technician due to a problem with the boiler is expensive. On thematic forums you can find the following data: 5000 rubles for eliminating the flame separation error. It is more expedient to conclude an annual maintenance agreement with a service center (cost about 2500). The benefit is double – significant money savings and professional service.

Experts recommend mitigating the risk of electrical interference on the gas main. For this reason, the control circuit of Ariston boilers often gives failures and errors. In some cases, the program is broken, and the board has to be reflashed. This problem can be avoided by installing dielectric inserts on the pipe (in several places); with professional installation this is done immediately.

When connecting an Ariston boiler to a gas tank, you need to choose the right supplier of “blue fuel” and conclude an agreement with him. If the flame separation error is caused by low quality LPG, there will be someone to file a formal claim and compensate for possible damage (both moral and material). And one-time calls to fill the reservoir of representatives of little-known organizations, even those offering a low price, should not be practiced. Solving possible problems with the operation of the Ariston boiler will ultimately cost more.

Problems with water heating

If during the washing mode the washing machine freezes for a long time, stops, does not heat up, or constantly drains water, the causes of the breakdown should be sought in the heating circuit. The device will signal these problems with codes F04, F07 or F08.

Failure of the heating element or pressure switch and codes F04, F07

In washing modes where heating is required, the error may appear immediately after startup, or after drawing water, but rinsing or washing in cold water will work normally. In this case, there are several options for solving the problem (besides the standard turn on/off the machine to reboot the controller).

If the code appears on the display during the washing phase or during startup (the machine does not even want to draw water), most likely the reason lies in the heating element itself. It can “pierce” onto the housing when the contacts come off or simply burn out.

To fix the problem, you need to get to the heating element, check all its connections, change the resistance with a multimeter (with a power of 1800 W it should produce about 25 Ohms).

To replace a faulty heating element, disconnect the cable with wires, unscrew the fastening nut (1), press on the pin (2) and pry off the sealing rubber (3), then install a new part and reassemble in the reverse order

If the device collects and then immediately drains water, the cause may be a breakdown of the pressure switch - the water level sensor. If there is a problem, this element can provide the controller with information that the heating element was not immersed in water, which is why the machine does not start heating.

In this case, it is necessary to check the water pressure sensor tube with the pressure switch (the hose may become clogged, kinked, frayed, or come off). At the same time, inspect the contacts of the sensor itself - they may need to be cleaned. But more precisely, code F04 “speaks” about the failure of the pressure switch - most likely, the part will require replacement.

To check the operation of the pressure switch, you need to put a small piece of hose with a diameter identical to the removed tube onto its inlet fitting and blow - characteristic clicks will be heard from a working part

In some cases, the problem may be in the board itself, faulty wiring or contact groups in the area from the board to the heating element or water level sensor. Therefore, you should ring all the elements of the control unit associated with the operation of the heating circuit, and if necessary, replace the burnt tracks or the controller itself.

Heating circuit faults and F08 symbol

If the water heating does not work correctly (or the machine “seems” to start when the tank is empty), error code F08 will appear on the display. The cause most often is a malfunction in the pressure switch circuit.

This problem can occur due to high humidity in the room, which negatively affects the controller. To make sure the board is in order, inspect it, wipe it dry, or blow it with a hairdryer.

Another simple solution to the issue could be the disconnected contacts of the heating element and the pressure switch, especially if the device was started for the first time after transportation. In other cases, a more professional inspection will be required with possible replacement of parts.

First, make sure that there is really no water in the tank, then remove the back panel of the machine and check the heating element with a tester

Possible malfunctions of Ariston machines, indicated by code F8:

If the washing mode is interrupted immediately after starting or during the washing phase and the device does not heat the water, the heating element will most likely need to be replaced.
If the machine stops after starting, when switching to the rinsing mode, or does not spin, it is possible that the contact group of the heating element relay is “stuck” on the controller when it is on. In this case, you can replace the failed elements of the microcircuit and, if necessary, reflash the board.
If the device “freezes” in various modes (and this can be either washing, rinsing or spinning), the wiring or contacts in the heater circuit may be damaged, or the pressure switch may break down, which considers that not enough water is entering the machine.

But if, when checking all the connections of the circuit and separately the pressure switch, the heating element relay and the heating element itself, no damage is detected, you will have to change the controller.

Problems with multi-zone control (errors 7**)

Ariston brand boilers allow you to divide your house into zones, each of which will have its own heating mode. If a problem occurs with one of the sections, the system accurately determines the malfunction, so repair of a specific circuit can be carried out without interfering with the remaining normally operating parts of the heating network.

Error #70X. There is a problem with the coolant supply temperature sensor in zone X. It is necessary to check the sensor contacts or replace this part.

Error #71X. The same thing, only with a sensor on the return line.

Error #72X. Overheating has been detected in zone X. First of all, you need to check the operation of the thermostat responsible for this area. It may simply be a loose contact or a broken unit. If it works correctly, then you need to change the settings.

Error No. 750. Hydraulic circuit error. The correct type of hydraulic module connected must be set (menu parameter 720). If there is no error here, then the problem is in the settings of the circuit itself.

Technical data of Ariston gas appliances

Ariston boilers are used for heating and water heating, that is, they are double-circuit. Each modification has its own characteristics, but the common type of fuel is gas.
The gas combustion chamber can be either open or closed. If there is a chimney, units with an open chamber are used. And in apartments of multi-storey buildings, where there are not always chimneys, equipment with a closed combustion chamber is used.
Power. Using this indicator, the gas consumption required to heat the room is calculated.
Compactness. Wall-mounted units are used in small, narrow rooms. Floor-standing units used in production or warehouse areas are heavier and require more space for installation.
Availability of a control unit. This element is indispensable when the water is turned off or when there is a sharp decrease in gas. In case of any malfunction, the unit will immediately turn off the device, which will prevent breakdown. It can also help you save fuel consumption.

Ariston boilers are used for heating and water heating, that is, they are double-circuit

Other breakdowns

In addition to those described above, the following codes may appear:

608 - the system generates this error when the fan starts, but the pressure switch does not work.

H45 - the last two digits may change.
The reason lies in the NTSc sensor, there is no hot water at the outlet, the safety valve is leaking. If there is no hot water, but the heating system is working, most likely the water flow sensor is faulty or clogged with debris. Another reason may be that the turbine blades have worked too hard, stuck to the housing, this can interfere with rotation, replace the blades or the turbine itself.

The second reason in this situation may be the NTC sensor; to check its functionality, measure the resistance at its contacts with a multimeter; if it is unstable, replace the sensor with a new one. If the safety valve is leaking, the gaskets may be worn out, replace them.

NTC sensor

How to determine the error code if the device does not have a display or does not have a dial, such as on the Ariston BS II 24FF model? This device is equipped with indicator lights, thanks to which you can determine the breakdown. So, for example, if the 90 indicator and the crossed out water drop icon are on, this means that the boiler has overheated and is blocked. To eliminate this, you need to check the pressure switch and its connection to the board.

Decoding

Error 501 appears when there is no burner flame and is typical for all Ariston modifications. Its presence is monitored by an ionization sensor installed in the combustion chamber. There are several factors that trigger the appearance of such code, although solving the problem is not difficult. Error 501 is generated by the boiler’s electronic board after the 3rd ignition attempt (at full power) with a negative result.

What to do

Reignite using the Reset button. Two or three attempts resolve the 501 error.

Resetting error 501 through the reset button of the Ariston boiler Resetting error 501 through the reset button of the Ariston Genus boiler

On a note. In Ariston boilers of the Class 24FF series, professionals note a factory defect - when pressing on Reset, the rod does not always reach the microswitch. If an attempt fails, it is better to restart directly from the control board (using the corresponding button).

Resetting error 501 through the reset button of the Ariston CLAS boiler

6p1

This code indicates incorrect air intake and an incorrect smoke removal process.

Causes of error 6р1

Signal circuit defects. Error 6р1 occurs when there is no “visibility” between the EPU and the traction sensor. Check the lines for reliable contacts, absence of short circuits, breaks, or melted insulation.

Clean your Ariston boiler

The tubes are clogged. Condensation or dust that came from the street through the filter. Blow it out, and error 6р1 will disappear.
Loose fitting of tubes on signal ports. Weakening and cracks in the polymer that appear during operation of the Ariston boiler lead to error 6p1. The problem is eliminated by heat-shrinkable material, a high-temperature sealant.
Deformation of plastic. Microcracks and tube breaks (CONDENSATE TRAP according to Ariston specifications) are reflected in the traction. The code is cleared by replacing the problematic part.
Condensate collector overflowing. A miniature cylindrical container where moisture entering the chimney accumulates. Emptying will remove error 6р1.
Venturi device deformation. Under the influence of high temperatures, the plastic bends, cracks, melts, and the hole is blocked.

Venturi boiler ariston
The air flow to the draft sensor weakens (stops), the pressure drops, the microswitch does not work, error 6p1 is displayed. Replacing the device is a matter of a few minutes; the services of a professional are not needed.

Damage to the condensate trap. It is located above the combustion chamber and is exposed to thermal effects. Touching its upper part leads to melting of the plastic, the tightness of the air supply channel to the draft relay of the Ariston boiler is lost. As a result, error 6р1.
Sensor malfunction. Burning of the MV contacts leads to a break in the signal circuit - the ED will not see the message that the boiler is ready for ignition and generates error 6р1. The solution is to replace the traction relay. The loss of elasticity of the membrane is not critical - it is not difficult to revive the device: remove it, tap it on a hard surface. The microparticles adhering to the rubber products will fall and the Ariston boiler will start. This method of eliminating the error is a temporary measure: the relay should be replaced.
Fan problem. It turns on, but does not develop speed. The forced draft is insufficient, error 6р1 is displayed. Reasons: contamination of the blades, making it difficult to rotate the shaft (cleaning is required) or interturn short circuit of the winding. The malfunction cannot be eliminated - the fan must be replaced.

If the measures taken do not remove error 6р1, the reason is in the “brain” of the Ariston boiler (EPU).

Ariston boiler control board

Diagnostics of the board is carried out in a hospital setting, on a simulator stand. In everyday life, even a professional will not be able to determine the ECU malfunction that caused code 6p1: contact a service technician. When submitting an application, indicate the marking of the control unit of your boiler (marked on the board with symbols of numbers and letters). Replacement during diagnostics - and the problem with the Ariston emergency lock is solved.

Error codes for other boiler components

A list of all possible errors, their digital designation, and decoding may take a long time. In order to more fully understand the significance of the various codes, it is worth giving a description of the most important, most frequently occurring problems with gas boilers.

501 - Ariston boiler error 501 indicates problems with ignition, the boiler must be reset with the RESET button. If there is no flame, the gas supply must also be checked.
6p1 - if error 6p1 occurs on the Ariston boiler, you need to check the exhaust system, it means that the contacts of the relay responsible for the operation of the fan have not closed in the normal way. Sometimes resetting with the Reset button helps.
5p3 - with error 5p3 in the Ariston boiler, flame separation from the burner was detected.
117 - if error 117 occurs, the Ariston boiler must be reset using the Reset button, and it should work.
sp3 – no burner ignition. Found in models with the EGIS Plus index and the like. Sometimes it is interpreted as flame separation, which makes it possible to classify the sp3 code as the most critical error.

Particular attention should be paid to problems such as flame separation. It occurs due to too powerful a gas flow and can lead to gas contamination inside the boiler. The same error in the Ariston 501 or 6p1 boiler does not cause any special problems, except for the inability to turn on water heating

Error - flame separation in the Ariston boiler may indicate serious problems in the supply system, they cannot be solved on your own, you just need to call a specialist, having first turned off the gas supply

The same error in the Ariston 501 or 6p1 boiler does not cause any special problems, except for the inability to turn on the water heating. Error - flame separation in the Ariston boiler may indicate serious problems in the supply system; they cannot be solved on your own, you just need to call a specialist, having first turned off the gas supply.

When a flame breaks out, a fire hazard arises, so if it occurs frequently or at least systematically, you should consider checking the gas supply line. The accumulated gas in the boiler can flare up and cause mechanical damage to it or even create a health hazard for people living in the apartment.

In addition, heating efficiency decreases significantly and gas consumption for the same volume of water increases. The flame power should be adjusted smoothly, without popping inside the boiler and other abnormal phenomena and sound effects. Only then can you expect economical operation from the heater.

Rice. 3

Flame and ignition control (errors 5**)

Problems can arise in both open and closed combustion chambers. Although it must be admitted that there are few types of faults here compared to other components of a gas boiler.

Error No. 501. No flame when igniting.

This situation can happen for many reasons:

No gas. You need to check the supply tap. It must be open.
The system will not turn on if the voltage between the neutral and the grounding conductor is more than 10 V. The current leakage must be eliminated.
The ionization electrode has failed. Before changing it, you need to check the quality of the connection to the motherboard.
The power of smooth ignition has lost. You need to adjust this parameter according to the instructions for the specific model.
Main control board faulty.

Error No. 502 : Registration of flame before activating the gas valve. It often occurs in the absence of a ground loop. If it is made according to the standard, then you need to perform the same steps as for error No. 309.

If the house did not have grounding, then it will have to be done for a gas boiler. Moreover, according to all the rules, otherwise the protective mechanisms will block the heating from starting

Error No. 504. Flame loss on the burner if it occurs at least 10 times during one cycle. It is necessary to check the gas pressure, the exhaust of combustion products and the gas valve.

Design features of the gas boiler Baxi baxi, Navien, Ariston

In any case, it will be useful to become familiar with the equipment of this class and the features of modern models. This knowledge will help you choose the right equipment and avoid making mistakes during operation.

In household boilers Baxi (baxi), Navien and Ariston, gas, diesel and solid fuel are burned to heat water, and electric heating elements are used. To more fully utilize the potential of energy resources, heat exchangers are being improved. They make long ducts of complex shapes to ensure that the liquid remains in the working area for a long time.

The current trend is compactness. Manufacturers offer gas boilers with square bodies of relatively small thickness. Some models, due to their aesthetic characteristics, deserve to be placed in a prominent place.

The next feature is the introduction of automated control systems. They control the combustion process, change operating modes taking into account the readings of temperature sensors on the street and in individual rooms. If the equipment overheats, it turns off without user intervention.

It is necessary to carefully consider situations when the Baxi gas boiler does not heat the water. This happens, for example, when the supply of energy resources is cut off. It is not difficult to carry out an appropriate check even without special professional training.

Circulation pumps, valves, and other typical components and assemblies rarely fail. Their designs are designed for many years of operation without mandatory maintenance. Electronic circuits have no moving parts at all. Their breakdowns occur due to defects. Subject to the rules established by the manufacturer, the service life of modern gas heating boilers is more than 10 years.

Voltage surges in the power supply network can damage the electrical part of the equipment. To eliminate such influences, an external stabilizer is installed. It will be useful to check the grounding system. This completes the set of preventive measures for this group of problems.

It is much more difficult to provide protection against the most common cause of breakdowns of gas boilers - scale.

It is this that will be studied in detail in this article. When heated, calcium and magnesium salts are converted to a solid state. It is these impurities that clog narrow technological openings in heat exchangers. They also form a porous structure on the surface of electric heating elements. If normal heat dissipation is significantly disrupted, their housings are damaged.

To prevent the formation of scale and lime inside the boiler, it is advisable to install non-chemical filters (water converters), magnetic and electromagnetic, which will ensure a long “life” of your boiler and an uninterrupted supply of hot water, as well as protect the heating circuit.

Temperature zones

It is also necessary to monitor temperature zones. If the display shows errors with codes 701-707, then this is probably overheating or a malfunction of the temperature sensor on one of the circuits.

Error code 701 - Supply temperature sensor error (zone 2)

Short circuit or open circuit in the electrical circuit of the flow temperature sensor (zone 2).

Error code 702 - Return temperature sensor error (zone 2)

Short circuit or open circuit in the electrical circuit of the return temperature sensor (zone 2).

Error code 703 - Supply temperature sensor error (zone 3)

Short circuit or open flow temperature sensor (zone 3).

Error code 704 - Return temperature sensor error (zone 3)

Short circuit or open return temperature sensor (zone 3).

Error code 705 - Water temperature sensor error

Short circuit or break in the electrical circuit of the hydraulic temperature sensor.

Error code 706 - Overheating error in zone 2

Overheating in temperature zone 2.

Error code 707 - Overheating error in zone 3

Overheating in temperature zone 3.

Other reasons for the error

Heating circuit filter. Installed at the entrance to the Ariston boiler, in the lower part. If the maintenance intervals are not observed, or if the system is contaminated with sediment, error 117 is guaranteed.

Heat exchanger. A clogged cavity prevents the free circulation of fluid. After washing the device, error 117 is eliminated.

Maintenance method

Dismantling the heat exchanger. First, the water from the Ariston boiler is drained, and the inlet valves close the lines.
Mechanical cleaning of surfaces. The pipes and fins on the heat exchanger body are freed from dirt and deposits.
Preparation of the solution. There are several special preparations on sale for removing scale and dirt from the cavities of boiler heat exchangers. But it’s easy to prepare an aggressive composition yourself. Recipe: 5 tsp. citric acid per liter of water. To quickly dissolve the grains, it needs to be heated.
Filling the device with aggressive liquid. Filling is done gradually, until a trickle appears in the outlet pipe.
Time delay. At least a day. It is advisable to place the heat exchanger where it will not cool down - the increased temperature of the liquid and the device body helps soften deposits.
Flushing. Clean water, under pressure, until the smallest fractions are completely removed from the cavity.

Code 501

When igniting, there is no flame or the flame disappears quickly. There are several reasons:

There is no gas supply, the valve on the pipe is closed.
The ionization electrode has oxidized or moved away from the board.

Do you need to check through the viewing window whether the flame appears at all or there is no spark? Specialists can fix the problem.

Electronics failures (error 3**)

Such complex modern equipment as gas boilers are equipped with electronics for automatic operation and response to different situations. Control boards can fail as a result of aging, power surges, excessive humidity, or mechanical damage.

Error No. 301. Problems with the EEPROM board (non-volatile memory) of the display. If such a message appears, you need to check whether the EEPROM key is installed correctly on the motherboard. This must be done as described in the user manual for the corresponding model.

If the key works correctly, then you need to check the contacts of the cable from the motherboard to the display board. There may also be a problem with the LCD screen itself. Then it will have to be replaced.

The display is connected to the board using a cable. If the boiler is working and the screen goes out, then first of all you need to check the quality of the connection. Naturally, with the power completely off

Error #302 is a special case of the previous problem. Both boards pass the test, but the connection between them is unstable. Usually the problem is a broken cable core that will have to be replaced. If it is ok, then the fault is on one of the boards. They can be removed and taken to a service center.

Error No. 303: Main board faulty. Rebooting usually does not help, but sometimes it is enough to turn off the boiler from the network, wait and turn it on again (this is the first sign of aging capacitors). If this problem becomes regular, the board will have to be replaced.

Error #304: More than 5 reboots in the last 15 minutes. Talks about the frequency of problems that arise. You need to turn off the boiler, wait a while and turn it on again. You should monitor it for some time to identify the type of warnings if they occur again.

Error No. 305. Program crash. You need to let the boiler stand off for a while. If the problem persists, you will have to reflash the board. This must be done at a service center.

Error #306: Problem with the EEPROM key. The boiler needs to be restarted. If the error repeats, you will have to change the board.

Error No. 307. Problem with the Hall sensor. Either the sensor itself is faulty, or there is a problem on the motherboard.

Error No. 308. The combustion chamber type is incorrectly set. You need to check the installed combustion chamber type in the menu. If the problem is not resolved, then the EEPROM key may be installed incorrectly or the motherboard may be faulty.

You can try to repair any electronic boards at a computer repair shop. Especially if the problem is caused by loss of contact or aging capacitors

Error No. 309. Registration of flame after blocking the gas valve. In addition to a malfunction of the motherboard (it will have to be replaced), there may be a problem in the ignition unit - loose closing of the gas valve or a malfunction of the ionization electrode. If the problem is in the electrode, then you can simply try to dry it.

Hot water supply faults (error 2**)

These types of faults occur in Ariston double-circuit gas boilers. For hot water supply, the safety system is autonomous, which allows you to quickly identify the problem.

Many Ariston boiler models support the ability to connect a solar system as an alternative energy source for hot water supply. Therefore, some errors and warnings of the “2**” series are related to the operation of solar panels.

Error No. 201. Problem with the power supply to the temperature sensor - open or short circuit. It is necessary to eliminate the breakdown of the electrical wiring.

Errors No. 202-205 are related to the operation of the sensors. When the signal stops coming from them or it behaves unpredictably (sudden jumps in data), then these errors are triggered:

№ 202. Problem with the boiler or solar system sensor.
№ 203. Problem with NTC temperature sensor.
№ 204-205. There is a problem with the temperature sensor that records the operating values of the solar collector.

To solve problems No. 202-205, you need to check the contact density. If this is not the case, then you will have to replace the faulty sensor.

Error No. 206. Problem with the cold water temperature sensor in the solar system. The solution is the same as for errors No. 204-205.

The temperature sensor is easier to replace than to clean. They are inexpensive, and they are easy to find, since parts with standard parameters are installed in the boilers

Error No. 207. Overheating of the solar thermostat. This may be caused by solar energy not being used to heat the water. Then the collector must be turned off. This malfunction can also occur when the thermostat breaks down. In this case, it will need to be replaced.

Error (warning) No. 208. Insufficient heating in the solar circuit. There is a risk of the coolant freezing. Turns on when the anti-freeze function is activated. Part of the energy from the gas will be used to heat the collector.

Error (warning) No. 209. Overheating of water in the boiler connected to the boiler. There may be a problem with the thermostat or its contacts.

Ariston gas boiler errors

Descriptions of error codes for Ariston boilers. Control board (error 302) Ariston boilers mainly use GALILEO-MCU boards with protection against voltage surges over 275 volts and fuse links; the current phase does not matter.

Ariston boiler error 501. Ignition failure. How to fix Fault code 501 means there is no flame on the burner. Fault code 502, on the contrary, means the presence of a flame on the burner, but with the gas valve closed.

Fault and error codes for Ariston boilers (Part 1) Almost any modern gas boiler is equipped with a variety of sensors, measuring and control devices, information from which goes to the main control module (board) and from which control signals are sent to turn on and off the actuators.

Arison error 104 - overheating Error 104 of the Ariston gas boiler. The main reasons for boiler overheating and poor coolant circulation.

Communication with peripheral devices (errors 4**)

The screen of Ariston geysers displays error codes for standard peripheral devices. This was done in order to explain the reaction of the boiler automation to an emergency situation. In this case, the consumer will be able to try to fix the equipment breakdown or conflict on his own.

Error No. 401. Communication problem between the bus and the data transfer device. It can be caused either by a malfunction of the device itself or by damage to the bus. Repairs are only possible at a service center.

Error No. 402. GRRS/GSM modem malfunction. You need to check its connection or replace the device.

Error #403: SIM card problem. The contact has come loose or the card itself is damaged.

Error No. 404: Data transmission between modem and motherboard failed. First of all, you need to check the contacts. If they are tightly connected, then the modem is faulty.

The GSM gas boiler control module allows you to remotely control the heating modes of the building. However, in addition to the obvious advantages, there is also a disadvantage - this is another unit that can break

Error No. 405-406. Data bus (interface) problem. Usually the fault lies in loosely connected contacts. Less often the tire itself needs to be replaced.

Error No. 407. Lost signal from the room temperature sensor. You need to check the connection (wire and contacts). If they are in good condition, then you need to replace the sensor itself.

Heating circuit

Does the scoreboard show an error? Perhaps the problem lies in a malfunction of the heating circuit. Take a look at the list below, find the error code and get the system working.

Error code 101 - Primary heat exchanger overheating

The overheating thermostat is triggered/faulty or the NTC sensor temperature is above 102C:

Check/adjust the maximum pressure of the gas valve.
Clean/replace the heating circuit filter.
Scale in the heat exchanger. Cleaning/replacing the heat exchanger.
Check the circulation pump for damage.

Error code 103 - Insufficient circulation or no coolant

Increase in supply temperature by more than 7 C/sec (repeated three times):

Check the coolant pressure in the heating circuit, or remove air from the Ariston boiler.
Cleaning or replacing the heating circuit filter.
Check the circulation pump for damage.

Error code 104 - Insufficient circulation or no coolant

Increase in supply or return temperature more than 20 C/sec:

Check the coolant pressure in the heating circuit, or remove air from the Ariston boiler.
Cleaning or replacing the heating circuit filter.
Check the circulation pump for damage.

Error code 108 - Low pressure in the heating circuit

Recommended recharge:

Check the coolant pressure in the heating circuit, or remove air from the boiler.
Check the wiring to the pressure switch. Check or replace the pressure switch.
Check the heating circuit and boiler for leaks.
Cleaning or replacing the heating circuit filter.
Check the circulation pump for damage.

Error code 109 - Validity test failed

The temperature of the return line during the startup of the Ariston boiler is 5 C higher than the temperature in the supply line of the heating system.
Make sure the NTC 1 and NTC 2 sensors have contact with the heating pipes.
Check the coolant pressure in the heating circuit.
Check the wiring to the pressure switch. Replace the pressure switch.

Heating circuit problems (error 1**)

For boilers with the Ariston logo, all error codes are grouped by node. For each case, you can determine the most likely causes of the problem and ways to solve it. It should be noted right away that not all faults can be fixed with your own hands.

The heating circuit is an integral part of the heating system. The gas boiler reacts to the behavior of the coolant and provides the user with information about emerging problems. Their solution can be related to both the boiler and the circuit elements.

If a malfunction occurs, an error code is displayed on the LCD screens of modern gas boilers. This is much more convenient than counting the number of blinks of LED lights as on older models

Error No. 101. Occurs when the coolant in the primary heat exchanger overheats and boils, when the temperature at the NTC1 sensor exceeds 102 °C.

This issue occurs in the following cases:

Excessive maximum pressure within the gas valve, resulting in excessive heating. This setting needs to be adjusted.
Low coolant movement speed. The problem may be caused by a clogged filter, the formation of restrictions from scale, or a breakdown of the built-in circulation pump. These problems need to be checked and corrected.
Failure of the temperature sensor. In this case, it needs to be replaced.

Error No. 102. Pressure sensor readings are outside the permitted range. This can be caused either by a problem with the pressure in the circuit or by a breakdown of the sensor itself.

The latter situation usually occurs as a result of wiring problems such as a short circuit or open circuit. It is necessary to ring the wire from the device to the central board.

You can ring the sensor itself with an ordinary tester. The resistance should be minimal - 1-2 Ohms. If it is missing at all, then the sensor will definitely have to be changed

Errors No. 103-107 occur at extreme values of coolant temperature. The system reaction occurs when analyzing the temperature in two places - at the water supply to the circuit and at the return point:

№ 103. 3 times within 4 minutes the rate of increase in the supply temperature exceeds 7 °C / sec.
№ 104. An increase in one of the indicators by a value exceeding 20 °C per second was recorded.
№ 105. The coolant supplied to the circuit is 55 °C hotter than the return flow. The problem was recorded 3 times in 4 minutes.
№ 106. The return temperature is 10 °C higher than the supply temperature. Recorded 3 times within 4 minutes.
№ 107. The return temperature is 30 °C higher than the supply temperature. Recorded once.

Considering that the temperature sensor has a simple design and, in fact, there is nothing to break, all that remains is to identify and eliminate the problem with insufficient coolant movement.

It may be caused by the following:

Airiness of the heat exchanger or heating circuit. You may have to check the entire route for traffic jams.
Filter clogged. This part needs to be cleaned or replaced.
Pump fault. Replacement or repair of the device.

Error No. 108 is displayed according to the readings of the minimum pressure switch. It can be caused by the same reasons that are typical for errors No. 103-107. In addition, there may be a breakdown of the sensor or the wiring to it, as well as depressurization of the circuit and partial leakage of water.

If a leak occurs, the pressure in the system will drop. The gas boiler will stop on its own, which distinguishes it from its solid fuel counterpart or ordinary stove

Error No. 109 occurs when there is a problem with excess pressure - more than 3 Bar. This can happen if the make-up valve is not completely closed. For further work, it is necessary to drain some of the water to reduce the pressure in the circuit.

Error No. 110. Failure or simple wear of the temperature sensor. First of all, you need to check the contacts and integrity of the wire. If they are ok, then you will have to replace the sensor itself.

Error No. 111 occurs when the pressure in the circuit is below the permissible level. The factory settings for this parameter for Ariston boilers are 0.4 Bar. The sensor may be damaged or water may leak from the circuit.

Error No. 112. Problem with the return temperature sensor. You need to check its contacts or replace the sensor.

Error No. 114. Problem with the outside temperature sensor. You need to check its contacts or replace the sensor.

Error No. 116. Triggering (opening) of the thermostat for the safe operation of the heated floor. You need to close jumper TA2 on the main board. If the operation occurs again, then there are problems in the underfloor heating system. Usually this is the presence of an air lock.

Error No. 117. On some older models, there is control of the difference in temperature values at the inlet and outlet 8 seconds after the start of operation. The boiler will stop if the heating does not start. Possible problems and ways to solve them are the same as for errors No. 103-107.

A clogged water filter causes problems with water circulation. This leads to boiler shutdowns and also has a bad effect on the pump.

Sometimes the indicator shows codes 1P1 – 1P4. These are not errors, but warnings that signal one-time sharp temperature changes. Such effects sometimes arise due to hydrodynamic processes characteristic of flowing hot liquid in a narrow stream. You shouldn't pay attention to them.

Features of Ariston gas boilers

The popularity of equipment under the Hotpoint/Ariston brand is associated not only with the low price of all products. The functionality of this equipment is often close in its characteristics to the flagship models of well-known manufacturers.

So, for gas appliances from this developer, the following functions are considered the norm:

Automatically maintains the outlet water temperature regardless of any changes in the environment, as well as fluctuations in the temperature of the water itself and changes in its pressure. The flame intensity is adjusted without user intervention;
Automatic pumping of air from the heating system, which creates safe conditions for the operation of the device;
In the event of emergency situations, the operation of the circulation pumps is blocked.

Rice. 1

All protective systems, like the flame maintenance and regulation unit, operate via an electronic board. This allows you to organize not only a convenient panel with control buttons, but also an indication of the current operating mode, and, if necessary, error codes indicating the suspected cause of the problem.

The decoding of these codes is usually presented in the operating instructions. The owner of the equipment can independently understand the situation and, to the extent he has the skills, also eliminate the cause. But in most cases, such information is useful only to determine whether it will be enough to simply restart the boiler or whether it’s time to call a repairman to your home.

Code 103

The error is due to the coolant heating too quickly, which can be caused by the following reasons:

airiness of batteries;
thermostat malfunction;
problems with the board.

If such an error occurs, you can try to bleed air from all existing batteries. In most cases, this will fix the problem. If after such actions the code continues to be displayed on the display, then the problem is deeper and cannot be done without the help of specialists.

Features of Ariston gas boilers

So, for gas appliances from this developer, the following functions are considered the norm:

Automatically maintains the outlet water temperature regardless of any changes in the environment, as well as fluctuations in the temperature of the water itself and changes in its pressure. The flame intensity is adjusted without user intervention;
Automatic pumping of air from the heating system, which creates safe conditions for the operation of the device;
In the event of emergency situations, the operation of the circulation pumps is blocked.

Rice. 1

Code 101

The error occurs when the coolant overheats, which prompts the automation to completely block the operation of the boiler until the temperature readings return to normal.

The reasons may be:

The coarse filter is dirty.
Scale on the heat exchanger, lack of preventive cleaning.
A malfunction of the pump that circulates water through the system.
Damage and malfunction of the NTC sensor.
Malfunction of the electronic control board, which generates a false high temperature signal.

Often with error 101 you can notice an increase in pressure at the outlet of the gas valve. Repair and search for the cause is possible only by experienced specialists. The maximum that can be done at home is to check how well the pump is functioning.

Code 102

Features of Ariston boilers

Ariston gas boilers are the most in demand on the market, thanks to their time-tested reputation. They are distinguished by their compact size, convenient connection and maintenance system, reliable operation, and a variety of models. The company produces single-circuit and double-circuit units, wall-mounted and floor-mounted, with an open (chimney required) and closed combustion chamber (removal of combustion products through a coaxial pipe).

Ariston devices are equipped with an improved heat exchanger design, which allows reducing gas consumption, automatic protection, which increases the service life, and precise settings. If the water or gas supply is interrupted, an automatic blocking occurs, which eliminates the failure of the device.

Sp3, 5p3 (flame break)

If the wall-mounted gas boiler Ariston 24 gives one of the indicated designations (error sp3 or 5p3), there may be a problem with the flame. Eliminating the error of flame separation from an Ariston gas boiler is associated with cleaning the chimney. It is too clogged with dust and soot or is not arranged correctly, so the fire is immediately blown out or the so-called flame separation occurs.

Decoding

The 307th fault code is displayed on the display of Ariston boilers of the Clas, Genus and Egis + modifications. The reason is electronics failures: the instructions indicate an internal error on the board. It manifests itself in different ways: during the initial start-up of the unit, when dispensing hot water, and periodically during the operation of the boiler. There is no need to rush to buy a new EPU, given the cost of the unit. An analysis of correspondence on forums and statistics on troubleshooting Ariston boilers shows: in some cases, the cause of error 307 is removed by the user independently.

Ariston boiler gives error 307

Code 103-107

Errors in this range are associated with an increasing temperature difference in the supply and return pipelines.

There are several reasons for this:

batteries are airy;
pump is faulty.

Expert opinion

Grebnev Vadim Savelievich

Heating system installer

When this code occurs, the boiler operation is blocked automatically. The search for causes is sometimes complicated by problems with the central temperature sensor, which records false readings.

Frequent malfunctions

The most common error codes and troubleshooting methods

The most popular among Ariston boilers are wall-mounted 24 kW models. During the operation of the Ariston gas boiler, failures and malfunctions may occur, like with any other equipment. The list of error codes is given in the instructions in the form of a table. Some of them are a malfunction of the automation (cause a protective shutdown of the device) and can be eliminated by clicking on “Reset”, and some signal malfunctions and interference in the operation of the boiler and require intervention (block the operation of the system).

The most common of them:

Ariston Clas Evo boiler control panel

Ariston boiler error codes

Error 108 appears when there is insufficient water pressure in the heating circuit. Why the pressure drops - the cause may be a leak from the heating radiators; you should check the connections in the pipes. During the heating season, it will not be easy to notice a small leak, since a small leak will evaporate on hot batteries. You need to turn off the heating and add pressure to 2.5 Bar to determine the location of the leak.

The next reason may be leaking heat exchanger pipes. To eliminate this, you can solder the heat exchanger; if soldering is not possible, it needs to be replaced. The expansion tank may become depressurized or the membrane in the expansion tank may become unusable - seal the tank or change the membrane.

The tank itself may also leak; this can be determined by pressing the spool valve at the top of the tank. If this causes water to escape, change the tank. How to increase the pressure - you can use a homemade original device consisting of a plastic bottle, a tap and a spool. Using a tap, cut a thread on the plastic bottle cap so that you can attach the tap to it.

Drill a hole on the reverse side to attach the spool to it. We insert the spool into the inside of the bottle and secure it. We pour water into the bottle, close the tap and connect the heating system to it through a hose, connect the pump to the spool and, pumping it, pour the water into the heating system. We repeat the procedure of pumping water into the system until the pressure normalizes to 1.5 Atm.

103,104,105,107

Error 103, error 104, error 105, error 107 occur when there is a violation of the water circulation in the circuit, its absence or low pressure. This happens when air has accumulated in the system; to remove it in Ariston Egis Plus 24 boilers (Ariston Egis Plus 24), press and hold the mode button for 10 seconds. On Ariston Matis and Ariston UNO boilers, hold the rezet button for no more than 6 seconds. The pump will run for 5 minutes without ignition, removing air from the system. then check the pressure, the norm is 1-1.2 bar, increase if necessary.

Boiler Ariston Egis Plus 24

Error 101 means overheating, the sensor has tripped, and after cooling the boiler starts up. The reason may be the accumulation of scale in the heat exchanger, as a result of which the flow decreases and the temperature increases, or interruptions in the operation of the circulation pump. Wash the heat exchanger, adjust or change the pump. Sometimes the reason may lie in the increased gas supply; tighten the valve; if this does not help, you need to adjust the gas valve.

Error 109 appears when the excess pressure is above 3 Bar and is considered one of the infrequent ones. To eliminate it, you need to relieve the pressure, as prescribed in the instructions for the device, using the Mayevsky tap. if this does not help, most likely the reason lies in the secondary heat exchanger.

Malfunctions in the heating circuit

Fault code 101. The source is either the overheating thermostat or the NTC sensor at the outlet of the primary heat exchanger. The response temperature is 102 degrees, i.e. a signal about overheating of the coolant. The most common reasons:

In addition to these reasons, there may also be a malfunction of the sensor itself or the control board.

Error code 102. Problem with the heating circuit pressure sensor (short circuit or open circuit) - check the sensor voltage at the board terminals with a tester, replace if necessary. A voltage of 0 Volts or 5 Volts on the control unit leads to a stop with code 102.

Errors 103, 104, 105, 106 and 107 are of a similar nature (insufficient coolant flow and the consequence is local overheating), as well as 101 - the only difference is in the logic of the definition:

code 103 – too rapid heating of the coolant in the supply pipeline (speed more than 7 degrees per second);

code 104 – an increase in the temperature of the supply and return pipelines by more than 20 degrees per second;

105 – the difference between the temperature in the supply and return pipelines exceeds 55 degrees (3 times);

106 – the temperature in the return pipe exceeds the supply temperature plus 10 degrees (3 times);

107 - the temperature in the return pipe exceeds the supply temperature + 30 degrees once;

Error 108. The pressure in the heating system has dropped below the permissible level (for models equipped with a pressure sensor)

In most cases, to eliminate the error, you need to add water to the system (feed), but if such a problem occurs again after a short period of time (several days), you will probably have to look for the cause of the coolant leak or check the expansion tank.

Some Ariston models (for example, GENUS) have an automatic make-up function, which is activated when the pressure drops less than 0.6 bar (the threshold can be adjusted by the corresponding parameter in the settings).

109 – pressure above 3 bar;

110 - malfunction of the thermistor on the heating system supply (break, lack of contact, short circuit);

111 – similar to code 108 for models with automatic refill mode;

112 – malfunction of the temperature sensor in the return pipeline (open circuit or short circuit);

Code 114 - no contact with the outside air temperature sensor (there may also be a problem with the firmware of the electronic board for some boiler models)

Error 116 is the same as 114, only for the room temperature sensor.

Ariston error display on the boiler panel without a liquid crystal display (using the example of EGIS)

Error description (⊗ – flashing)