Error codes for Ariston gas boilers indicate malfunctions

Modern gas boilers are equipped with control sensors. This system is also called protective automation. Sensors are triggered when there is a problem, blocking the operation of the equipment. They do not miss serious problems and breakdowns. To unlock the operation, find out the error value of the Ariston boiler. Once the cause of the blockage is eliminated, the equipment will restore heating.

General characteristics of Ariston boilers

The description of Ariston gas units must begin with the characteristics of their main part - the burner. This element is used to burn fuel and release thermal energy into the heating system.

Types of boiler burner:

• regular
• modulation

The modulation burner is more convenient to use. It provides automatic power control depending on the temperature of the device.

According to the type of exhaust of combustion products, burners are divided into:

• closed type
• open type

Units with a closed burner are safer to use. In this case, natural gas combustion products do not enter the room. The use of a chimney is not required. A coaxial pipe is simply connected to the device and taken out.

The design of the coaxial pipe provides for the presence of two layers, which ensures the simultaneous removal of waste and the flow of air from the street into the burner.

Equipment with an open burner requires the use of a chimney to remove combustion products.

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

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.

How to determine the model of Ariston boilers?

The name and model number are indicated on the device itself, the packaging box or the operating instructions.

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.

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).

All codes are divided into six groups according to the number of boiler components. The first value indicates the node in which the failure occurred, the rest indicate the error code. But it should be noted that if the protective error is repeated frequently, this indicates a malfunction.

The most common of them:

• error sp 3 (5p3) - refers to problems with ignition and means flame separation. Happens on Ariston Clas Evo models and indicates a problem with the gas block. Checking and adjusting the gas valve can solve the problem, but in some cases the reason lies in improper assembly of the coaxial pipe on devices with a closed combustion chamber;

  
  Ariston Clas Evo boiler control panel

• error 501 - no ignition. Check whether the gas valve is closed; if there is supply, you should pay attention to the ionization electrode, it may get wet, dry it with a hairdryer. Look to see if it is bent; the distance from the electrode to the comb should be 8mm with a tolerance of 1mm; see if the connection between the electrode and the board is good;
• error 607 - stuck contacts of the fan control relay; replacing the relay, and sometimes the entire electronic control unit, will help.

Expert's conclusion

When stopping the Ariston boiler, you do not need to immediately call a technician and waste precious time. Just look at the code displayed on the display. Repair statistics show that in 85% of cases the user can solve the problem on his own. But you shouldn’t resort to the help of “all-knowing and experienced” people. Some Ariston models have significant design differences, which are taken into account during the repair process. The main advisor is the manufacturer's instructions. The document must have a section with explanations for each error code.

Decoding boiler error codes

Numerical combinations are displayed on the screen instead of a clock, which is why not a letter designation was chosen, but a digital one.

So, the list of codes usually looks like this:

• 101 – boiler overheating.
• 102 – pressure sensor does not work.
• 103 – absence of water or its low pressure (rate of change in the temperature of the medium is over 7ºC per second).
• 104 – absence of water or its low pressure (rate of change in the temperature of the medium is over 20ºC per second). If error 104 occurs, the Ariston boiler must be reset to its original state using the Reset button.
• 105 – lack of water or low pressure (supply water temperature is higher than at the inlet by more than 55ºC).
• 106 – lack of water or low pressure (supply water temperature is lower than at the inlet by 10ºC or more).
• 107 – lack of water or low pressure (supply water temperature is lower than at the inlet by 30ºC or more).
• 108 – no water in the primary circuit. If error 108 occurs, the Ariston boiler cannot be reset using the Reset button; repair is required.
• 109 – excessive pressure in the primary circuit. If error 109 occurs, there is also no point in resetting the Ariston boiler; you need to check the water supply line.
• 110 – contact lost in NTC1 sensor.
• 111 – short circuit in NTC1 sensor.
• 112 – contact lost in the NTC2 sensor.
• 113 – short circuit in NTC2 sensor.
• 114 – external temperature sensor not detected.
• 115 – external temperature sensor has shorted.
• 1p1 – poor water circulation or its absence, determined by the following sign: the temperature of the carrier increases faster than 7ºC per second.
• 1p2 – poor water circulation or its absence, determined by the following criterion: when the temperature difference between the outlet and inlet is more than 55ºC.
• 1p3 – poor water circulation or its absence, determined by the following sign: when the temperature of the return water is 10ºC higher than the supply.

This list of codes applies exclusively to the heating circuit; other components also have their own set of codes. Depending on the model, additional signals may appear; their descriptions can be found in the operating instructions.

Rice. 2

Purpose of sensors and where they are located

We look at the pictures, read the inscriptions - here we have collected all the sensors used in the boiler and reporting any error. With the exception of the pressure sensor, it is not included in this diagram, since it is not used in this boiler model. Well, a sensor with a pressure gauge is not yet indicated, I think everything is clear there, it’s just an indicator reporting the amount of pressure in the circuit. By the way, in some modifications of boilers, the submersible temperature sensor in the DHW circuit - NTCs - may also not be installed.

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 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

Checking the gas supply

The presence of gas supply to the Ariston boiler is immediately checked. To do this, in a house or apartment, go to the gas stove and check whether the gas lights up on it or not. If there is a gas supply, it will be necessary to “restart” the boiler. To do this, press the “Reset” button in the boiler control menu. After the reboot, if the problem does not disappear, then carry out the diagnostic procedure. If you are not confident in your abilities, then diagnostic and repair procedures should be entrusted to a professional specialist who will do everything correctly.

Error code 501 - Error: No flame found at ignition

• There is no gas.
• There is no contact or grounding is not used. The voltage between neutral and ground is more than 10 V AC.
• Malfunction of the ionization electrode. Check the electrical contact and continuity of the circuit from the ionization electrode to the main board.
• Check or adjust the power of smooth ignition.
• Check the main board for damage.

Error 501, what it means and how to fix it

Error 501 means that the device does not start due to lack of ignition flame. The heating unit can be turned on by correcting the following causes of failure:

• lack of gas (you need to make sure it is present, open the gas valve);
• control board failure;
• violation of the electrode connection with the ignition control module;
• breakdown of the ionization electrode (it is necessary to clean the contacts, check the correct placement of the comb: a distance of eight millimeters must be maintained between the parts);
• reduction in the power of the smooth ignition system;
• leakage of electric current (remove the breakdown in the electrical network: the voltage should be 10 V).

Check what

Gas supply to the burner

The absence of “blue fuel” in the line, the blockage of the path causes error 501 Ariston. In the house, the gas stove and heating boiler are connected to one “thread” of the pipeline. By igniting all burners, you can check the stability of the gas supply to household appliances. If the stove does not work, you need to contact the emergency service. With an autonomous gas supply, it is easy to identify the problem area yourself, taking into account the installation diagram.

Error 501 of the Ariston boiler is caused by: production of energy resources in the cylinder group (gas holder), malfunction or freezing of the meter (when installed outside the building), operation of the shut-off valve (during a short-term power outage), icing of the gearbox. The metering device is sealed, and if you suspect its failure, you need to contact the gas workers.

If code 501 Ariston appears when the boiler is put into operation after purchase, the connecting pipe is checked. The manufacturer installs a plastic transport plug on it, which installers with insufficient experience mistake for an o-ring and do not remove during the piping process, connecting the flexible gas line to the fitting. As a result, the fuel supply channel to the burner is blocked and error 501 Ariston.

Check the gas hose for the Ariston boiler

Ignition electrodes

Incorrect position, contamination: lack of spark leads to error 501. A simple malfunction caused by non-compliance with maintenance intervals and user carelessness. It takes a few minutes to fix.

Clean the ignition electrode of the Ariston gas boiler

Reference electrode

State.

As the boiler operates, the sensitive element gradually becomes covered with soot, which is why it does not “see” the flame. Removing soot and soot allows you to remove error 501. The second reason is increased humidity in the chamber. Moisture accumulation occurs when the Ariston boiler is left idle for a long time in an unheated room without being turned on. Drying is easy with a directed stream of warm air (from a hairdryer) or by heating the room with an electrical appliance (convector or similar).

Position

Careless actions when servicing the combustion chamber of a heating installation lead to the ionization sensor becoming confused. Sensitivity is lost, error 501 appears. The interval recommended by the boiler manufacturer Ariston between the electrode wire and the burner metal is 8 mm.

Signal circuits

An open, short, or unreliable contact causes a 501 error.

Ceramics integrity

The ionization sensor is installed in an assembly with ignition electrodes. To prevent short circuits to the housing, the holder is made of dielectric. Its defects in the form of chips and cracks trigger an error with code 501.

Electronic board

Controls the operation of the gas valve. The absence of a signal is the cause of error 501. Ariston boiler diagrams differ depending on the model, series, and year of manufacture. It is easy to find the control points yourself using the wires connecting the unit to the electronic module. The multimeter switch is set to position

U, the Ariston boiler is starting up. Presence of voltage (

110 V) indicates the correct operation of the board; its absence indicates the need for diagnostics (replacement).

Ariston Egis boiler control board

On a note! The condition of the module is visually assessed. Cracks, damaged radio components, deformation of the board are reasons for rejection, even if there are no complaints about it at the moment. Any defect is an Ariston boiler error in the future. And this is the heating season, so you need to eliminate such a risk in advance. In a humid room, moisture condenses on the board: droplets of water and traces of oxidation are immediately removed.

Expert opinion

Spark generator

Located on the gas valve of the Ariston boiler. The characteristic clicks when a spark occurs are not always heard. The reliability of the connection with the ignition electrode, the quality of the grounding, and the 220 V supply from the control module are checked. If there is no spark, the transformer is tested. Resistance is measured between contacts (counting from left to right) 1 and 2, 2 and 4: it is easy to identify a break or a short to the body. The detected defect indicates the “culprit” of the 501 error.

Ariston gas boiler transformer

Gas valve

There are several possible reasons for the appearance of trouble code 501. The unit regulates the supply of “blue fuel” to the burner in the volume required for the set mode of the Ariston boiler. Spare parts for it are not sold - in case of breakdown it is replaced. Self-repair is possible, but you need to do the work carefully, without changing the settings. Mainly refers to the adjusting screw (gas pressure).

Gas valve with coils and transformer in an Ariston boiler

The flow of “blue fuel” is controlled by electric valves. You can independently check the solenoid coils with a multimeter in R measurement mode. The resistance of the first (pins 3–4) is 878 Ohm, the second (pins 1–3) is 6860. The modulation should show R=80 Ohm.

Error 501 of the Ariston boiler also occurs due to a mechanical malfunction of the valve. It is associated with contamination of its cavity, which complicates the operation of the dampers that regulate the gas supply to the burner. Partial disassembly of the unit and washing eliminate the 501 code. This happens due to the use of low-quality “blue fuel” in autonomous gas supply, if the owner of the facility focuses only on an attractive price, without checking the supplier’s certificates.

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.

Useful tips

Most errors, and 501 is no exception, are cleared by restarting the Ariston boiler (RESET button).

The appearance of fault codes is associated with the quality of the supply voltage and grounding. The instructions for Ariston boilers indicate

When repairing an Ariston boiler yourself, you do not need to blindly follow recommendations from thematic forums. Users describe methods for eliminating error 501 in relation to the heating system model they were dealing with. Any unclear details should be clarified in the instructions for your boiler.

If you replace the board, you need to pay attention to its specification (numeric-alphabetic code). In relation to Ariston boilers, professionals point to 2008, when circuit changes were made to the module. If this fact is overlooked, after the heating installation is repaired, some error will appear again.

If the startup of a used Ariston boiler fails and an error appears, you need to check the settings by going to the menu - it is not known what parameters were set by the previous owner: clarify, adjust (if necessary).

On a note! Warranty equipment should not be touched. If the service workshop is not authorized by the manufacturer to provide technical support for the sample, even its representative does not need to be allowed into the Ariston boiler for repairs, not to mention various experts (for rural areas, calling a professional is a problem). The documentation for the heating unit contains contact numbers: contact them immediately and file a claim by mistake. Unfortunately, not everyone takes into account that if the installation or troubleshooting of the installation was carried out independently (by a third party), the warranty is automatically void.

Expert opinion

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.

1. 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.
2. 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.
3. 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.

Spark test

The button on the control panel turns off the boiler and shuts off the gas supply to the boiler. Next, the power supply to the boiler is turned off (usually the plug is pulled out from the socket and the corresponding circuit breaker in the electrical panel is turned off). Then carefully remove the front decorative cover using a shaped screwdriver with a star-shaped attachment. The screws that will need to be removed are located at the bottom of the decorative panel. After unscrewing them, the panel can be removed quickly and easily if you lift it upward. After this, you need to unfold the control panel cover (it is taken by the upper part and lowered down). At the second stage of diagnosis, the combustion chamber cover is removed to make sure there is a spark. For such purposes, two special latches are snapped off, which are located at the bottom of the camera, then it is easily removed. Then you will need to unscrew 2 screws and remove the firebox cover (it rises up and is easily removed from the boiler). The special firebox contains elements such as a heat exchanger, a gas burner, and a special unit that is responsible for turning on 2 electrodes and 1 flame control electrode. It is necessary to carefully inspect them all for defects and external mechanical damage. If there are any problems, then damaged components or boiler elements simply need to be replaced using a special tool. After this, you need to turn on the power supply to the boiler and press the power button on the control panel. Then, after starting the pump, the fan turns on - you can see if there is a spark. If there is no spark, each of the electrodes is moved and checked to identify a breakdown or defect.

Check if the spark plug produces a spark

Checking operating pressure

If there are no problems with the spark, and error 501 for the Ariston gas boiler has not gone away, then continue the diagnosis. To do this, you need to turn off the power supply, check the actual operating gas pressure, and how the gas automation operates. For such purposes, a micromanometer is used. It will be necessary to turn it on, unscrew the sampler screw (using a flat-head screwdriver 2 turns) to measure the gas entering the inlet. To do this, connect the micromanometer pipe to the sampler and open the gas supply valve. If the pressure is about 259 mm of water column, then this is good. For other values, the cause of low gas pressure is determined by contacting the appropriate organization. Next, you need to return everything back to how it was. Close the gas supply valve, remove the pipe, and tighten the sampler screw. If the previous check did not produce results, then proceed to the next stage of diagnosis.

On the left is a three-way valve made of brass. On the right with a blue head there is a gas valve. The Ariston boiler will be designed similarly

Checking gas automation

At this stage, the condition of the gas automation, the resistance of the modulation and locking coils are checked. The procedure begins with a preliminary inspection of all elements for breakdowns and mechanical damage. After this, remove the ignition transformer from the gas valve (use a Phillips screwdriver to remove the fixing screw). Then the connectors are removed from the modulation coil. Next, the resistance is measured using a multimeter (in resistance test mode at 200 Ohms). If the resistance of the modulation coil is about 78 ohms, then this is normal. Next, the resistance of the blocking coils is checked (measurement limit 20 kOhm). The probes are placed on the upper locking coil on legs 1-3, and if the value obtained is about 6.5 k Ohm, then this is the norm. Next, the resistance of the second coil on legs 3-4 is measured (it should be about 1.6 kOhm). It is important to know that if there is no numerical value of resistance (the value “1” lights up on the device), this means that some coil has failed - it must be replaced. To change it, you need to unscrew a special screw and pull it out. Then you need to replace it with a working new one. In this case, the resistance must be measured after replacement.

Completing the diagnostic and repair procedure

After replacing the defective element, you need to connect the ignition transformer to the gas valve and connect the modulation coil connectors. Next, the control panel is put in place and the power supply is connected. After this, you should turn on the gas supply to the boiler itself. After all this, the operation of the gas boiler is checked. If everything is in order, then the problem is fixed.

Hardware problems that can lead to error 104

Fault code 104, according to the manufacturer's instructions, indicates poor circulation or insufficient coolant.

Ariston boilers have an automatic system for checking the circulation and heating of the coolant at the moment of release from the heat exchanger, which protects the device from overheating.

Control is performed by temperature sensors NTC1 (supply to the central heating circuit) and NTC2 (input from the central heating circuit). NTC devices are thermistors, the resistance of which decreases with increasing degree of heat of the coolant.

When the rate of increase in readings on NTC1 or NTC2 is more than 20 degrees per second, and fault code 104 occurs.

In real life, this breakdown looks like this: after switching on, the burner ignites, after a few seconds the gas boiler makes the characteristic crackling sounds of rapidly evaporating water, then the boiler clicks, the installation turns off and switches to emergency mode with error code 104.

In models BS 24 ff, cf the red light 90 gr is on. together with the indicator (crossed out flame), this indicates overheating of the equipment. When the yellow indicator (chimney) in the 24 ff heater flashes simultaneously with the 40 or 50 g indicators, this means a lack of coolant or insufficient circulation.

When trouble code 104 appears, the manufacturer recommends that you first reboot the equipment to make sure that it is not a system self-diagnosis failure.

Let's find out how to enable restart - to do this, press the "Reset" or "Reset" button on the control panel.

If after a reset the boiler does not function normally, then the self-diagnosis indicates a real defect.

The most likely causes of equipment damage: either problems in the heating pipes, or problems in the device itself - clogged coarse filter, damage to the pump, electronic board, sensors, heat exchanger.

If the pressure meter transmits inflated data, or heat transfer decreases, this demonstrates problems in the heating structure: blockage in the pipeline, the formation of air locks, a violation of the tightness.

Blockages appear due to the penetration of dirt into the pipes, layers of rust and scale. Detecting the location of a blockage is a very labor-intensive task; for this, methods of measuring the heat of pipes and an acoustic method are used, in which the pipeline is tapped and listened to.

To flush pipes, a hydraulic method is used, or the blockage is broken through using a wire with a brush attached to the end.

Air jams are formed as a result of air entering the pipeline for the following reasons: when water is heated, air dissolved in it creates air bubbles; air accumulation occurs due to a decrease in pressure, leaks, and repair processes.

After finding the plug by tapping (the sound increases in the problem area), the air space is eliminated using air collectors or air bleed valves.

Air locks also lead to a decrease in pressure in the heat exchanger, which will result in error code 108.

In most cases, leaks occur due to corrosion, which leads to both leaks and complete rupture. If you do not have the skills to properly install heating pipes, you should contact a specialist.

Ariston CLAS, GENUS, ALTEAS models have a built-in mesh filter. It is advisable to monitor its condition on a regular basis; if it becomes clogged, the bearings quickly wear out and cooling deteriorates.

To verify the cause of the breakdown, you should perform several manipulations:

1. Turn off the power supply; you must completely remove the power, since after pressing the on/off button, the mechanism continues to function for some time; you will have to wait several minutes to stop completely.
2. Let's see what pressure the built-in pressure gauge shows.
3. Turn on the power and note the pressure gauge readings with the device in operation. If the pressure drop exceeds 0.2 bar, the structure is clogged.
4. We open the front cover, fold out the control panel with the board and find the mechanism we need. It is located at the coolant inlet from the central heating circuit (bottom right), and a pressure gauge capillary is connected to it.
5. Having previously shut off the heater, drain the water and remove the clamps.
6. We first take out the capillary, and then the part we need, prying it off with a screwdriver.
7. We wash the device and clean it of deposits, then install all the elements in the reverse order.

To check the circulation mechanism, unscrew the release screw on it, after placing rags or rags under it to prevent moisture from getting on the board. This will make it possible to see whether the shaft rotates after starting the equipment.

You can also turn off the power and try to turn the shaft manually with a screwdriver by inserting it into a special wide slot. If the shaft rotates manually but does not start when the device is turned on, check the supply voltage of the mechanism. If there is 220 watts on the chip, most likely the cause of the heater defect is damage to the part.

Ariston installs 2 types of pumps, with modulation and two-speed WILO: if the modulated one has become unusable, then only replacing the element will help, but the two-speed one can be repaired by changing the rotor and impeller assembly. A rotor from WILO RS25/6 is suitable for these purposes.

The circulation pump has two rotation speeds: V2 (55 W) – central heating mode and V3 (80 W) – hot water supply mode. Consequently, it is activated by 2 relays, the first supplies 220 V power, the second regulates the speed of rotation of the shaft.

To check the functioning of both relays, the heater should be started in the “Purge” mode; this mode is configured by pressing the ESC button for more than 5 seconds. Next, we measure the alternating voltage: at the 3rd and 4th terminals there should be 220 V, and at the 5th and 6th - 0 V or 145 V. If the required voltage is not available, the corresponding relay should be replaced. When there is voltage at the 3rd and 4th terminals, but the unit does not turn on, try making a jumper between pins 5 and 6.

If power is supplied to all terminals, a possible cause of the defect may be an interturn short circuit. This problem can only be eliminated by completely replacing the component part.

Removing air pockets in the system

It's better to start with batteries. To remove air pockets, a Mayevsky tap is usually installed on them. We open it and wait for the water to run. Did you run? Let's close. Such manipulations must be done with each heating device separately.

How to start a boiler with your own hands photo

After the air is removed from the batteries, the pressure in the system will decrease and the pressure gauge needle will drop. At this stage of work, the solution to the question of how to start the boiler involves re-filling the system with liquid.

Now, the most difficult thing is that starting gas boilers requires bleeding air from the circulation pump. To do this, the boiler needs to be disassembled a little. We remove the front cover and look for a cylindrical object with a shiny lid in the middle, which has a slot for a screwdriver. After we have found it, we put the boiler into operation - we supply it with electrical power and set the water heating controls to the operating position.

Relieving air from the circulation pump when starting the boiler photo

The circulation pump will immediately turn on - you will hear a faint hum and loud gurgling and many incomprehensible sounds. This is fine. As long as the pump is aired, it will be so. Take a screwdriver and slowly unscrew the cap in the middle of the pump - as soon as water starts seeping out from under it, screw it back. After two or three such manipulations, the air will come out completely, the strange sounds will subside, the electric ignition will work and start working. Check the pressure again and add water to the system if necessary.

Basically, that's it. While the system is warming up, you can begin to study the instructions in detail (if, of course, you have not already done so) and start debugging the system that involves starting the boiler. Everything is simple here - the batteries closest to the boiler need to be screwed on, and the ones farther away need to be turned on to their full potential. This debugging is carried out using control valves installed on the supply connection pipe to the heating radiator.

Other breakdowns

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

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.