The first start-up of the gas boiler Ariston 24. Entering the menu and service settings of the Ariston boiler. Bleeding air from the system

The last step installation of almost any heating system is its first trial run, debugging and commissioning. By and large, if the boiler equipment is launched for the first time, then this work is a priority for service centers. During the first start-up, specialists service center check the correct connection of the boiler, debug it and put this equipment for a guarantee. If you carry out the first launch yourself, then you can not count on the warranty service center. Starting and debugging the heating system can also be carried out during the operation of the system - you will not turn to specialists every time. Owners of individual heating just need to know this process. We will study it with you in this master class with step by step photos, in which, together with the website, we will study in detail the issues of how the boiler is started up and how the heating system is debugged with our own hands.

Filling the heating system with water

launch gas boiler starts with filling the heating system with water. Everything is simple here - modern double-circuit boilers do not require the device of a special unit for feeding the system. It is already built into the boiler and is equipped with a special faucet, which, as a rule, is located at the bottom of the boiler in close proximity to the cold water connection pipe. Open the make-up tap and slowly fill the system with water.

Starting the boiler - how to fill the system with water

Highly important point in the operation of any boiler equipment is the fluid pressure. To control this parameter of the heating system, almost all boilers are equipped with a pressure gauge. In the process of filling the systems with water, it is necessary to monitor the pressure and after it reaches 1.5-2 atm, the filling of the system will need to be stopped. In principle, the indicator of the working pressure of the boiler, depending on the manufacturer and model, may vary - therefore, see the exact figure for the working pressure in the instructions for the boiler.

Do-it-yourself first start-up of a gas boiler

Removal of air locks in the system

Better to start with batteries. To remove air jams, a Mayevsky crane is usually installed on them. We open it and wait for the water to run. Did you run? We close. Such manipulations must be done with each heater separately.

How to start the 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. On the this stage work, the solution to the question of how to start the boiler involves re-feeding the system with liquid.

Now, the most difficult thing is that starting gas boilers requires venting 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 cover 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 regulators to the working position.

Releasing air from the circulation pump when starting the boiler photo

The circulation pump will immediately turn on - you will hear a faint hum and a loud gurgling and many incomprehensible sounds. This is fine. As long as the pump is airy, it will be so. We take a screwdriver and slowly unscrew the cover in the middle of the pump - as soon as water begins to seep out from under it, we twist it back. After two or three such manipulations, the air will come out completely, incomprehensible sounds will subside, the electric ignition will work and start working. We check the pressure again and, if necessary, add water to the system.

Basically, everything. While the system is warming up, you can do a detailed study of the instructions (if, of course, you have not already done so) and debug the system, which involves starting the boiler. Everything is simple here - the batteries closest to the boiler must be screwed on, and the distant ones should be run to the fullest. Such debugging is carried out by means of control valves installed on the pipe connecting the supply to the heating radiator.

Maintenance and start-up of the gas boiler Ariston Uno

Preparing the wall-mounted gas boiler Ariston Uno for work

If the Ariston Uno 24 mi boiler is installed in an apartment, it must be checked that all regulations regarding air supply and ventilation of the room are observed (in accordance with current regulations).

Periodically check the water pressure with thermomanometer "L" and check (when the system is cold) that it is between 0.2 and 1.3 bar.

If the pressure is below the minimum value, it must be restored using the filling valve located at the bottom of the boiler.

When the pressure reaches 0.7 bar, close the valve. If the pressure drop occurs very frequently, there may be a water leak in the system. In this case, the leak must be repaired.

Switching on procedure - Press the "C" button. The electronic device will ensure that the burner is ignited without any manual intervention, depending on the heating or hot water command.

If after 10 seconds the burner does not ignite, the safety devices of the Ariston Uno 24 mi boiler will block the gas outlet and the red light diode “G” will light up.

To turn on the boiler in this case, press the button "B". If blocking occurs again, you should check that gas cock was opened.

Heating regulation - It is possible to regulate the temperature of the water in the heating circuit using knob "A", setting the pointer between the minimum and maximum values. The temperature may vary between 45°C and 80°C.

Control using a chrono-thermostat - If a chrono-thermostat is installed, it is recommended to keep the heating temperature set at the maximum value using knob "A" for a higher efficiency of the Ariston Uno 24 mi boiler.

Technical and service maintenance wall-mounted gas boiler Ariston Uno 24 mi

Checking the tightness of the hydraulic system of the boiler, replacing the gaskets and restoring the tightness.

Checking the tightness of the gas system of the boiler, replacing the gaskets and restoring the tightness.

Visual inspection of the general condition of the boiler.

Visual check of combustion and cleaning of the burner.

After checking, disassemble and clean the combustion chamber.

After checking, clean the injectors.

Visual inspection of the primary heat exchanger: checking the condition of the plates; cleaning the smoke channels of the heat exchanger;

Adjustment of the normal gas flow: consumption at ignition, at partial and full load.

Checking the functioning of security systems: overheating; on excess of working pressure;

Checking the functioning of the security system of the gas part of the Ariston Uno boiler: protection in the absence of a flame (flame sensor); safety of the gas valve;

Checking electrical connections.

Monitoring the operation of the DHW circuit (checking performance and outlet temperature).

Characterization combustion products.

General check of the functioning of the boiler.

Monitoring the health and correct location of the smoke detector. If necessary, replace with a smoke detector with similar characteristics.

Removing the casing

To approach the internal elements of the Ariston Uno 24 mi boiler, you must:

Unscrew the screws located at the bottom of the boiler;

Turn the mounting plates outward;

Pull forward lower part front panel until the center latches exit and remove towards the top.

When removing the casing and turning the control panel, access to the internal elements of the boiler is opened.

Initial start-up of the boiler Ariston Uno 24 mi

When you turn on the device for the first time:

Make sure that: electrical connections and earthing are made correctly and a two-pole switch is installed with a minimum open contact gap of at least 3 mm; the plug of the automatic air vent of the heating system is loosened; pressure in the heating system
below 0.7 bar; gas cock closed

Unlock the circulation pump by unscrewing the plug on the front of the pump housing and turning the pump shaft with a screwdriver.

Connect the power supply to the boiler by pressing the button “C” and set the handle “A” between the minimum and maximum marks to activate the “winter” mode. Thus, the circulation pump will turn on; after 7 seconds, a lockout will be activated due to the absence of a flame.

Leave the Ariston Uno boiler in this state until the end of air bleeding.

To remove air pockets, loosen the plug of the deaerator of the circulation pump; re-bleed the air from the radiators; briefly open the hot water tap;

Check the pressure in the heating system, if it has dropped, open the filling valve and bring the pressure to 0.7 bar;

Check that the flue gas system is working properly.

Make sure that the required shut-off valve is open.

Open the gas cock and check the tightness of all connections, including the main burner ( gas meter should not record gas flow). In any case, check the tightness of the connections with soapy water and repair gas leaks, if any.

Press the "B" button to unlock the ignition. The igniter will ignite the main burner; if this does not happen the first time, repeat the same operation.

Check the value of the minimum and maximum gas pressure on the main burner and adjust the pressures.

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OPERATION AND REPAIR OF BOILERS

Proterm Panthera Proterm Skat Proterm Bear Proterm Cheetah Evan
Ariston Egis Teplodar Cooper Atem Zhitomir Neva Lux Arderia Nova
Thermona Immergas Electrolux Conord Lemax Galan Mora Aton

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Some malfunctions in the operation of the boiler may be due to correct settings in the service menu settings. This can happen, for example, after unskilled intervention or ... as it once happened in my practice, after flooding the boiler board with water.

Of course, first of all, the service menu serves to configure, adjust and diagnose the operation of the boiler. In this article I will share how to enter the service menu of the Ariston Class 24 FF boiler and how to change the parameters, as well as give the values ​​\u200b\u200bthat were set in my boiler from the factory.

Before proceeding with any settings, it is important to carefully consider the menu structure, as well as to understand whether you need to intervene and change any parameters. Incorrect intervention can lead to serious malfunctions. For example, there is a parameter that is set depending on the version of the boiler and is used by specialists when replacing the board.

Given all of the above, you must understand that some of the parameters I have given as "Factory Settings" may differ from those you need specifically, and therefore you carry out all these gestures and settings at your own peril and risk.

Quick article navigation

Ariston boiler menu structure

At first it may seem complicated, but as you figure it out, everything will be simple and clear, so:

Each parameter is identified by a three-digit numeric code. For example 228 (this is just a parameter code that depends on the version of the boiler)

The first digit of the three-digit code means a separate menu group, the boiler has six separate menu groups, each responsible for its own settings section. Here they are.

2 - Boiler settings

3 - Solar collector and storage boiler

4 - Zone 1 parameters

5 - Zone 2 parameters

7 - Testing and maintenance

8 - Technical parameters.

The second digit of the three-digit code indicates the submenu, and the third is the parameter itself to which access is granted.

For example, the code 228 already known to us stands for: 2 - Boiler settings (this is the Menu), 2 - Basic boiler settings (Submenu), 8 - Boiler version (Parameter).

Thus, by dialing the three-digit code 228, we get access to the set value of this parameter, which, according to the table, can vary from 0 to 5 and depends on the version of the boiler.

I will provide tables with menu codes and a description of what is regulated by a specific code a little lower, but for now let's figure out how to enter the boiler service menu.

Service menu of the boiler

For all manipulations with switching modes, only 4 buttons are involved - Plus, Minus, Ok / Menu, ESC.

It is important to understand that not all menu items of the boiler will be available to you, some of them will become available only when additional devices are connected to the boiler, such as external sensors or solar collector.

And most of the menu items are available only by the service code, I'll tell you about it below, but for now, "let's practice on cats"

Our kitties will be values ​​that are open to free access. But first, read how to work with the menu.

How to work with the menu

By pressing the “OK” button once, the number 2 will flash on the digital indicator - this will be the first digit of the future three-digit code (Menu group number)

With the plus and minus buttons, you can change this value from group number 2 to any other group. To fix the selected group for further entering the code number, you need to press “OK” again - after that the second digit of the future three-digit code starts flashing (Submenu)

Having selected the submenu, we fix it by pressing the “OK” button again and in a similar way select and fix the third digit (Parameter)

Everything! Now the screen will no longer display the three-digit code itself, but the set value of this parameter, which can be changed by pressing "plus" "minus". After making the necessary changes, do not forget to fix them by clicking "OK".

Please note that after selecting the desired menu, after a few seconds of inactivity, the three-digit code (to remind you where you are) and the parameter corresponding to this menu will be displayed in turn.

The ESC button is used to exit the settings menu and return to the previous step. The exit is carried out step by step, one press is equal to one step back.

Practicing

Now, if you want to practice, to better understand the switching order. For example, enter the menu code 701, this will turn on the forced air removal mode, in fact, turn on the pump in the boiler for 6 minutes.

When this mode is enabled, the symbol “P I -” will light up on the display. You can exit the “Anti-air” mode without waiting 6 minutes if you press ESC.

Then with ESC try to go back and change to mode 300 which means ( Set temperature water in the boiler) in the values ​​\u200b\u200byou can see the temperature that is set in your this moment DHW regulator.

How to enter the closed sections of the menu by access code

So, if you understand how to work in the menu, then it's time to move on to more serious things. The vast majority of all settings are closed from accidental interference by an access code. Therefore, in order to proceed with the boiler settings, we perform the following steps.

Press "OK" several times until the indicator shows the value 222 - Then hold "Plus" until the value becomes 234 - then again "OK" - Everything is ready!

Now we have one number 2 constantly lit and another 2 blinks - Which, as you understand, means the following - Menu 2 is on and you can select a submenu, and then a parameter. By setting the desired three-digit code and clicking "OK" we will see the value of the parameter that can be changed.

Use the ESC key to go back and select other menu items and submenus.

Tables with three-digit codes, descriptions and set values

The values ​​added in the white fields are the values ​​used in my boiler. If there are no corrections, then I have the same values ​​​​as those printed in the table. To enlarge, click on the photo of the table.

Table 3

I turned on the ariston bs 24 ff boiler in heating mode, set the coolant temperature to more than 60 degrees and the following began to happen - after the burner turns off, after 5 seconds crackles begin in the boiler, approximately in the upper part near the heat exchanger. What is this fault? The boiler has been in operation for 2 years.
Maintenance was carried out, except for cleaning the heat exchanger from the inside from scale and other things! The maintenance man said there was no need to descale! The device, as it worked 2 years ago, still works without changes, except for crackling after the burner goes out, but only at coolant temperatures above 60 degrees.
We carried out the installation and installation of the wall-mounted boiler Ariston. Works great for heating. On the hot water supply, it turns on, heats up for about a minute and the flame turns off, the green 40-80 are on, then the green 40-50 error and the yellow chimney "Alert for insufficient water under pressure" blink. After that, the flame appears and warms further, then turns off again.
The Ariston Uno boiler is set to summer mode. I turn on the tap hot water, the boiler is working normally (heats the water). After turning off the hot water, gas is ignited on the radiator circuit, and the boiler continues to heat the water already in the system. After a while, it either stops (it seems to “remember” that it is in summer mode) or make attempts to re-ignite the gas on heating system. But he can't do it.
Most likely, you will have to reflash the program memory.
Installed a gas boiler Ariston Uno 24 MI. At first it worked fine, but about 3 months ago problems started, first with hot water, and then with heating. During ignition, the boiler ignites, but ignition clicks are heard for 7-10 seconds, and then the protection is activated, the boiler goes out, the red light is on. After pressing the reset button, it lights up and works fine. It used to be 1-2 times a day and only when hot water was turned on, but now it's constantly. Tell me what could be the problem?
Clean the flame control electrode with zero, probably covered with soot. If you don’t know who is responsible for the control, it won’t hurt to clean everything that is in the combustion chamber above the burner. Well, if it doesn't help, then pay.
What is the reason for blocking the Ariston UNO 24 MFFI boiler when the heating is turned on? Moreover, blocking occurs after approximately half an hour of operation - when the batteries are fully warmed up. I thought maybe the temperature sensor, but the indicator "says" the ignition.
You need a repair fee, it is not necessary to change.
The Ariston Uno 24 MFFI EE boiler is faulty - the yellow lamp turns off and the yellow lamp lights up. How to fix?
Check the operation of the turbine.
Check pressure switch.
Check the functionality of email. fees.
The Ariston Uno 24 boiler operates in heating mode and periodically turns off. with the extinction of all diodes. When turned on it on the button on. it starts, for some time it can work for an hour or half an hour and off. I think it's a fee.
Recently carried out repairs. Did the following.
1- cleaned the air valve. Didn't work completely.
From this, in the heat exchanger, due to the presence of air, the scale turned into some kind of black flakes. (local overheating affected).
2- washed both heat exchangers. The secondary was 90 percent full.
The second operation was done twice. But I think I'll have to do it again in the spring.
3-washed the filter on the return line.
It looks like the secondary heat exchanger is clogged with scale, overheats and turns off. Needs to be washed!
The gas boiler Egis Plus 24 FF is in operation. The pressure in the heating circuit dropped by 0.5 atm within two weeks. I checked the expansion tank, it was zero. Pumped up to 1 atm. Now it began to fall more slowly, in the expansion tank the pressure is normal. For what reason can there be such a pressure drop in the Republic of Belarus? Outwardly, he is whole, the air does not poison. Basically, the pressure in the heating circuit drops after using hot water. At
while pumping up, closed the supply and return valves. I drained the water from the boiler, poured out a little when I pumped it up. So far this season has worked well.
If you are sure that it is falling in the heating system circuit, then look for a leak in it.
Installed and connected Ariston Egis Plus 24 s open cam combustion.
Got a problem, need advice
1. The temperature in the DHW circuit does not depend on the set parameters and is always maximum. The heating circuit is adjustable.
2. Feeling that the boiler does not change the intensity of the flame (in both modes). It lights up at maximum and works like this until it turns off when the maximum temperature is reached. Is it customizable in some way or something more serious?
First you need to look at the settings of the gas valve.
The boiler in heating operation gives error 104. The pressure in the expansion tank is 1 bar. the pressure in the apparatus does not drop to 1.4bar, the bypass is all right, the turbine and everything else is also normal. Everything is clean line. What can the third digit in the error mean? Boiler Ariston Class chimney. And if we have a pressure sensor? I didn't find it.
If the error is only when working on heating, most likely the malfunction should be looked for in the heating system, I would start by checking the CO filters. Most often not, but there were instances with a pressure sensor. To be sure, check menu parameter 247 and set to 0 if necessary.
We did the installation and launched the wall-mounted boiler Ariston Clas System 15 FF. During operation, it gives error 104. Pressure in the expansion tank 1. The pressure in the boiler 1.5 does not drop. The filter is clean. There is no air in CO. The heat exchanger is washed clean. What could be the problem? Stops 3-4 times a day. I noticed that when an error occurs, some kind of hiss and pressure jump from 1.5 to 1 and again becomes 1.5 and error 104 comes out.
Options: board, pump, NTC.
Tell me, do you need to drain the coolant before pumping air?
We drain (bleed through the bleeder) the coolant until the pressure gauge shows 0. Before that, close the CO taps under the boiler. Then we pump pressure into the air part expansion tank by checking the pressure with a third-party pressure gauge. We pump up 1.0-1.2 bar. We open the taps. Then we pump it up with pressure in CO, control the pressure with the boiler manometer. We inflate either through the make-up tap or third-party
pump at the CO filling point. We pump up to 1.3 -1.5 bar. Check if the air vent is open. We turn on the boiler, and if there is a mode for removing air from the CO, then we drive the device in this mode. We also warm up the CO to the maximum. Air is removed from CO. We pass through the heating appliances and bleed the air out of them through the Mayevsky tap. The pressure will drop a little. We feed to the indicated values ​​\u200b\u200bof the above. Everything. If everything is correct, then
heated to maximum temperature, the pressure in closed system will not rise more than 0.3 bar.
A malfunction in the operation of the double-circuit boiler Ariston Egis 24 ff - when hot water is turned on for 20 seconds of operation, the flame goes out and error 109 lights up, a plausibility test failure. What is it and how to fix it? First, the burner goes out, and then lights up 109 DHW temperature is the temperature of the water in the tap? Can I do the repair myself?
Choose one of the options:
1. Error 109 lights up and after that the burner goes out;
2. The burner goes out and then error 109 lights up;
Set the DHW temperature to 50 degrees or less and see if there is a change.
Tell me, where is the expansion tank located on the gas boiler Egis 24FF, and more specifically the spool for pumping? And how to properly drain the water from the boiler? To correctly pressurize the expansion tank.
It is located at the back, above the boiler.
- Close the cold water inlet valve to the machine.
- Open the hot water tap on the mixer at any point of the tap.
- Open the make-up tap.
- Wait until the pressure gauge needle drops to zero.
The problem in the operation of the double-circuit boiler Ariston BS II 24 CF. When the heating is turned on, the burner starts and turns off after a short time, the system does not warm up completely, and the device is already turned off. They called the master, he said that the pump was out of order, although when the boiler was turned on, a slight vibration was felt and the supply pipe heated up and the first three radiators too (the remaining three could not be checked). But
return slightly warm. The boiler does not give errors. How can I check if the pump is working?
Switch off the boiler with the button and from the socket; turn off all the taps, drain the water from the device through the drain fitting, close the board with some kind of waterproof oilcloth on top so that water does not get in, remove the pump and try to turn it by hand - how easy it turns.
1. clogged return filter.
2 the filter in the boiler is clogged (the tube where the pressure gauge enters).
3 clogged heat exchanger.
4. The pump does not reach operating parameters.
Aegis plus 24 FF boiler is in operation. When I turn on the hot water, the device turns off after 30 seconds and gives an error 303. Tell me, what could be the damage?
Most likely, you will need to change the board.
The boiler Ariston BS 24 FF was installed, it worked for 4 years without breakdowns. Now a problem has arisen: If you set the temperature, for example 70, the boiler does not heat up the entire system, although everything was fine before. Only the first 3 batteries are heated, respectively, the return cools down, the device turns on for a short time (the sensor on the dial shows a maximum of 40) and the heating is turned off, although the return is a little warm. I don't know what the problem is, maybe I need to put an additional pump? (The stabilizer is standing, the filter is only from mechanical impurities.).
The filter in the boiler is clogged.
We are going to connect a single-circuit wall-mounted gas boiler Ariston for 15 kW. Does it need an expansion tank? How to check the boiler after starting?
This model already has a regular expansion tank, but its volume is not always enough for work. We need to check the heating system. If it is large enough, then you will need to embed an additional tank outside the boiler. Before starting commissioning, the heating system must be filled with water, including underfloor heating and radiators, and the chimney must be ready.
In operation, the Ariston boiler, which runs on a cylinder of liquefied gas. Recently, it has become scary to turn it on: the volume of the flame flies high up. How can you fix and repair?
It is necessary to see why there is no flame control, and what has failed - the gearbox or the flame regulator, or is there another reason for this phenomenon.
Boiler malfunction Class Evo. Suddenly stopped turning on, only the fan runs non-stop. Shows errors 201 and 607. Can this be fixed?
Error 201 means a short or open circuit in the hot water circuit temperature sensor circuit. Error 607 - these are the contacts of the pressure switch are closed before the fan turns on.
In Egis Plus 24, the heating mode was turned off, leaving only hot water. It became impossible to start it: writes "Board failure". How to carry out repairs yourself?
Measure the potential between zero and ground, there should be nothing. If there is a voltage of at least 2-3 V, then the boiler will write an error and the potential must be removed. Then you should find out the voltage in the network: at 180-190 V, the board will also fail. If everything is in order, then the problem is in the board itself.
Ariston Genus 24 is connected, it began to give a “flame break” error. What removes it?
The boiler is clearly too high pressure gas. The gas valve needs to be adjusted. There may also be a problem with the air supply to the boiler.
The Class 24 double-circuit boiler stopped producing hot water, error 103 is displayed. What can I do on my own?
This error code indicates insufficient coolant circulation. The water pressure in the DHW circuit should be checked, if it is low, then there may be a leak. If the recharge does not give anything, or gives a short-term effect, you should call a specialist.
When the hot water tap is opened, the wall-mounted gas double-circuit boiler Ariston Class 24 turns on, d38 is displayed on the display, and after 2-3 seconds. 5Р3 appears and immediately again d38, after 2-3 seconds again 5Р3 and immediately again d38. And so on the scoreboard the information changes during the first 20-25 seconds. water heating. Further, the water is heated without problems and d38 is constantly on the screen. It started after they stopped heating the house, that is, the boiler
only works for hot water. This is the first question. And the second: After closing the hot water tap, error 104 lights up on the display. The boiler starts only after pressing RESET. What could be the reason for these problems?
Had the same error. We decided to flush the secondary DHW heat exchanger. But you have to wash it every six months. The symptoms were the same. More. There is a special device for flushing, connected to the input / output of the DHW circuit. If you use it every six months, then such a flush is enough. If the heat exchanger is heavily contaminated with deposits, then it is necessary to remove the heat exchanger and “soak” it in a solution with citric acid(vinegar).
We did the installation and start-up of the clas evo 24 ff boiler. A malfunction has occurred. The boiler does not pump the heating system, the first two radiators are warming up. Heating polypropylene. It does not throw any errors though. What could be the problem? I also want to add that the temperature quickly rises for about a minute and a half and the boiler goes out.
There is no circulation of the heating system, there may be a blockage or transport plugs from the radiators may not be removed, there may be air both in the pump and in the system.
We put into operation a gas boiler Ariston clas system 24 ff. When starting up, the boiler does not always ignite, it is clear that there is a spark, some amount of gas is flowing (I noticed the meter readings), but the flame does not ignite. After 8 seconds, as expected, error 501 is displayed. Sometimes at the moment of ignition, you can see how a small flame flares up and goes out, sometimes it ignites without problems with normal flame. I also noticed that there is a flame on the burner
different strength. I thought that this was due to the temperature of the coolant, but with several switching on and off of the boiler, the flame is different at the same temperature. The boiler was installed, which is called "as is", i.e. no parameter settings have been made. The only parameter that I tried to change was parameter 220 “Smooth ignition” - factory setting 47, I tried to increase it to 80 - it didn’t work, I returned it back.
Didn't change any other settings. I also noticed that when the temperature setting is increased to 61 degrees, the device does not turn off, i.e. it gradually reduces the flame as it approaches the temperature and continues to burn in this mode. When the temperature was set to 53 degrees, it heated up and turned off, but then it could not start due to the above problem. Find a specialist in such boilers in our outback
impossible, and the nearest center is 200 km. Maybe someone faced a similar problem? Advise what check operations need to be done to identify the malfunction.
It is necessary to slightly increase the minimum pressure of gas on gas. valve. Heating up to the set temperature takes place for min. pressure. Adjustment (handle) DHW - to the maximum. The flow must correspond to the maximum (12 l / min). The first measurement (for gas) at the inlet, in static, then at start-up. If the pressure drops below 14 mbar, do not touch the valve, otherwise you will reset all factory settings.
Tell me, I have a wall-mounted gas double-circuit boiler Ariston Class 28 CF. When DHW is turned on, the water temperature does not correspond to the temperature set on the screen. At first I did not pay attention to this, but lately the readings have diverged very much, I set 45, but it flows, about 38. How to fix it? Can you do the repair yourself?
Need inspection and maintenance with complete cleaning do.
After turning on the boiler (in heating and hot water mode), the green LEDs 50/60/70 and the yellow house LED light up, the boiler does not light up. What to do?
This error is the presence of a flame when the gas valve is closed (false flame). The board needs to be repaired.
I have connected a wall-mounted boiler EGIS II 24 FF for three years of operation. During the year, the fan relay failed several times, what is the reason? The fan is constantly running!
Contact sticking. Perhaps the propeller is hard to rotate, because of this, an overestimated current through the contacts. Try to put a relay with a large current. (More than it was), the current is indicated on the relay case. Also check the contacts of the fan connector on the board and the contacts on the fan itself - perhaps the contact is not very good somewhere - because of this, the relays do not work for a long time. In boilers of this series, reconfiguration of this parameter (protection against
water hammer) is not provided for any of the three modifications of the control board.
The boiler is new. For some reason, the DHW circuit is not working. Heating works fine. When trying to turn on hot water, the boiler only shows the temperature, but is not even going to heat it, it waited about 5 minutes.
The problem is with the 3 way valve. The caliper let the water in - ruined the mechanics of the servomotor. Both need to be changed.
Installed wall mounted gas boiler BS II 24 CF NG. When DHW is switched on, the yellow lamp (t-40) first lights up, and then it starts flashing. The water heats up normally, the heating works, in general, everything works. Whether the light should be flashing or some kind of system failure. When heating and hot water are turned on, it burns, does not blink. I was told that it shouldn't be like this, it should just burn. The boiler was just installed, we are afraid of failures in winter period.
The boiler was installed this spring, there were no problems. Now a rather strange breakdown has arisen - an error 5p3 (flame separation) appears. Moreover, the error appears only if the temperature of the heating circuit is set below 60 degrees (the device tries to start, ignition is heard, the burner icon appears on the panel for a second, then it disappears and an error pops up). If I set it to 60 degrees or more, the problem goes away. What could it be?
This 5P3 error on these boilers may occur due to the switching power supply installed there. The potential that the ionization electrode sees arises as a result of combustion meets the potential of the boiler itself (which will be more than 5V) if it is not grounded, this error may occur. A technician can check this by disconnecting the ground wire from the main control board and restarting the boiler at your desired temperature. the error should be gone. If this does not happen or your boiler is grounded. Then you need to look at the settings of the gas valve.
The gas boiler Ariston Egis plus 24 FF is in operation. When you open a hot water tap, almost immediately after opening it starts to go cold, then hot for about 20 seconds, and again cold, again hot for the same about 20 seconds, and again cold, and so on ad infinitum. The display of the gas boiler shows err 109, judging by the instructions, this is some kind of “plausibility text failure”. Can you tell me what this test is?
Could this be causing an error, and how can I fix this problem?
The boiler needs to be serviced.
Tell me about connecting a room thermostat to the boiler. I did everything according to the scheme that was attached to it. To begin with, I threw back the jumper, the boiler did not start - this is normal! I connected the room thermostat, the device did not start, but when the knob was turned, somewhere more than 23 degrees, there was a click in the thermostat, the boiler started working, but turned off and on without responding to the thermostat. I tried to switch on the thermostat
terminals, on the contrary, the device turns on up to 23 degrees, when the thermostat knob is turned, a click and the boiler turns off, but even in this position it does not respond to the thermostat. Who knows, tell me, maybe I'm doing it wrong!
It probably turns off due to overheating of the coolant above the ordered temperature. Add temperature on the boiler.

Double-circuit gas appliances make our life more comfortable and enjoyable. They are quite practical to use, suitable for heating country houses and small apartments. They are used for heating industrial or warehouse buildings, the area of ​​​​which is not more than 500 sq.m.

The advantages of Ariston boilers are that in addition to heating buildings in winter, they heat water used in everyday life all year round. It is quite convenient and does not require the installation of additional equipment.

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 to transfer thermal energy to the heating system.

Types of boiler burners:

• ordinary
• modulation

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

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

• closed type
• open type

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

Design 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 provides for the mandatory use of a chimney to remove combustion products.

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 type or closed. In the presence of a chimney, units with an open chamber are used. And in apartments of multi-storey buildings, where there are not always chimneys, they use equipment with closed camera combustion.
• Power. Using this indicator, the gas consumption required to heat the room is calculated.
• Compactness. Wall appliances are used in small, narrow rooms. Floor units, used in production or storage areas, are heavier and require more space for installation.
• The presence of a control unit. This element is indispensable when turning off the water, a sharp decrease in gas. In case of any malfunctions, the unit will immediately turn off the device, which will prevent damage. It can also save fuel consumption.

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

Characteristics of Ariston boiler models

A distinctive feature of Ariston boilers is their high quality. After all, the name of the company is translated from Greek as “the best”.

Its products are especially popular among middle-income consumers. Gas boilers of this brand are purchased for space heating up to 500 sq.m. The company's products are universal. The transition to liquefied fuel is carried out only by replacing the burner.

Practical to use are dual-circuit wall-mounted gas appliances. It is represented by three lines, each with its own modifications.

For all modifications of boilers, the common is:

• small size.
• hot water supply, in the absence of its centralized supply.

Gas boilers of various modifications differ in structure, the common thing is their low cost and high-quality performance of parts.

Basic equipment of units from Ariston:

• double heat exchanger.
• electronic gas burner control module.
• carbon monoxide control.
• support of the microclimate in the building or in a separate apartment.
• control of water freezing inside the system.

Let us consider in more detail the existing types of Ariston equipment.

Ariston Genus

• Are issued with the double heat exchanger. All modifications are double-circuit and are mounted on the wall.
• This model is considered the most functional of all Ariston devices. It has an LCD display, a control panel with buttons. Ariston Genus can be configured to offline work throughout the whole week.
• The display shows the basic status of the instrument and a list of possible errors. The burner is modulating, that is, fully controlled by electronics. This function increases the comfort of using this model of gas appliance, due to the minimum control by the consumer.

The Ariston Genus line includes Evo and more expensive Premium models.

The Evo model is a two-circuit gas appliance with a burner of both types: open and closed.

Genus Premium condensing boilers. They are used for heating residential buildings and commercial buildings. Power range from 24 kW to 35 kW.

Ariston Clas

• Small size device.
• This is a cauldron with two circuits and an elegant appearance. The reduced dimensions did not impair its functionality in any way.
• Expansion tank for 8 liters. Hot water is heated fairly quickly

Existing modification:

• Evo is available in open and closed combustion chambers. Power with an open burner - 24 kW, with a closed - 24 - 28 kW.
• Premium Evo condensing type appliance. Has advanced comfort and freezing functions
• Premium simple condensing unit.

Ariston Egis

• It is installed mainly in rooms up to 200 sq. m in size.
• The most common Ariston gas appliance model in our country. It heats water with a stainless steel heat exchanger, and a copper heat exchanger is used for heating.
• The compact device, differs in profitability and can be used under complicated weather conditions. For example, at sharp sub-zero temperatures.
• The device is equipped with a modulating gas burner, which allows for electronic control over the operation of the boiler.

This model is adapted to work in harsh climatic conditions. Normally withstands changes in gas pressure. The device is equipped with a collector into which condensate flows. This ensures operation at temperatures below 50 degrees.

>Cost of Ariston boilers

The average cost of Ariston Genus boilers is 54,000 - 72,000 rubles, Ariston Clas - 25,000 - 34,000 rubles, Ariston Egis - 27,000 - 34,000 rubles

Choosing a gas appliance for heating

Ariston products can be found in the catalogs. There are many models of gas appliances. The main mistakes with the wrong choice of the unit are made from a lack of information. Therefore, before visiting the store, you should familiarize yourself with the basic tips for choosing a wall-mounted gas appliance.

When choosing a boiler, consider the following points:

• The size of the kitchen, as the place where the heating device is most often installed. In the store, the choice begins with a consideration of the overall dimensions of the device and select it individually for your kitchen.
• Then they go to the technical data and study the type of water heater in the device. If in a family a large number of person, it is not recommended to purchase a boiler with instantaneous water heater.
• In this case, it is more rational to purchase a boiler with a storage tank for hot water and select equipment for the amount of water that you will need for everyday use.
• Evaluate the combustion chamber of gas equipment. It is closed and open. It is recommended to choose a boiler with a closed chamber, because it is safer to operate. The presence of a chimney is optional, which is relevant in high-rise buildings. It is enough to buy and bring a coaxial pipe to the street.

Most Common Error Codes and Troubleshooting

The most popular among Ariston boilers are wall models at 24 kW. During operation, the gas boiler Ariston may experience failures and malfunctions, like 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 are eliminated by pressing "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 nodes. The first value indicates the node in which the failure occurred, the rest - the error code. But it should be noted that if the protective error is repeated often, this indicates a malfunction.

The most frequent of them:

Ariston Clas Evo boiler control panel

error 501 - no ignition. Check if the gas valve is closed, if there is a supply, you should pay attention to the ionization electrode, it may get wet, dry it with a hair dryer. See if it is bent, the distance from the electrode to the comb should be 8mm with a tolerance of 1mm, is the connection between the electrode and the board good;

error 607 - sticking of the fan control relay contacts, replacing the relay, and sometimes the entire electronic control unit, will help.

101

Error 101 indicates overheating, the sensor has tripped, 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 rises, or interruptions in the operation of the circulation pump. Flush the heat exchanger, adjust or change the pump. Sometimes the reason may lie in the increased gas supply, screw the valve, if it does not help, you need to adjust the gas valve.

103,104,105,107

Error 103, error 104, error 105, error 107 occur when there is a violation of the circulation of water in the circuit, its absence or low pressure. This happens when air has accumulated in the system, to remove it in the Ariston Egis Plus 24 (Ariston Egis Plus 24) boilers, press and hold the mode button for 10 seconds. On Ariston Mathis and Ariston UNO boilers, hold the rezet button for no more than 6 seconds. The pump will operate 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

108

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 joints in the pipes. During the heating season, it will not be easy to notice a small leak, since a small smudge will evaporate on hot batteries. It is necessary to turn off the heating and add pressure up to 2.5 bar to determine the location of the leak.

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

The tank itself may also leak - you can determine this by pressing the spool at the top of the tank. If this causes water to escape, change the tank. How to raise the pressure - you can use a home-made original device, consisting of a plastic bottle, a tap and a spool. On the plastic bottle, cut a thread on the cover with a tap so that the tap can be fixed on it.

On the reverse side, drill a hole to fix the spool on it. We put the spool into the inside of the bottle and fix it. We fill the bottle with water, close the tap and connect the heating system to it through the hose, connect the pump to the spool and, pumping it, pour water into the heating system. The procedure for pumping water into the system is repeated until the pressure normalizes, up to 1.5 atm.

109

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

When a partition is destroyed inside the heat exchanger, it may be a fistula in it, mixing with liquids begins. Water from the water supply, which has a higher pressure, begins to flow into the heating system, resulting in an increase in pressure. What to do if this happens - eliminating the fistula or replacing the heat exchanger will help solve this problem.

117

Error 117, according to the instructions for the Ariston BS 24 FF unit, means insufficient circulation. To eliminate, press the reset button, in this case the system will check and adjust the temperature difference at the inlet and outlet of 3.5 degrees in 8 seconds.

Reset button on the boiler Ariston - "reset"

201

If the circuit is broken or the sensor is short-circuited at the supply to the hot water circuit, error 201 appears. You should check the contacts, they may have oxidized, or the wire has come off, or the sensor itself is faulty and will have to be changed.

302

Error 302 appears on the display when there is no circuit between the control board and the display. The reason may be a violation of the contacts or their oxidation, in which case the contacts should be connected or cleaned. The control board may also fail - replacement is required.

303

Error 303 means a malfunction of the main control board, the only solution to the problem is to replace it.

304

Error 304 also appears in the event of a malfunction of the control board and appears if more than 15 resets are performed within 15 minutes.

Boiler board Ariston

307,308

Error 307, error 308 also appears in the event of a malfunction of the control board, pressing the reset button will help correct the situation.

501

Code 501 is described above in the most common errors section.

601

On models Ariston Egis Plus 24 (Ariston Egis Plus 24) CF, class 24 FF and others, with an open combustion chamber, error 601 means no thrust. The sensor blocks the operation of the column in case of interference in the smoke exhaust system.

This blocking is temporary, after 12 minutes the system will switch to operating mode if the cause is eliminated, otherwise it will repeat again. To eliminate, clean the chimney, if the chimney is free, check the operation of the draft sensor.

604

Error 604 occurs when the fan speed is low or the Hall sensor is faulty. The fan and sensor should be checked, if a breakdown is found, replacement is required.

Hall Sensor

607

The description of the cause of occurrence and the method of elimination are described above, in the most frequently repeated errors.

a01

Error a01 blocks the operation of the boiler due to a failure of automatic ignition. May occur when the mains voltage is low, install a stabilizer. The polarity can also affect, in some cases the problem can be fixed by changing the polarity in the outlet, reverse the plug, changing the phase to zero.

In addition, there may be problems with the flame ionization sensor. Check if it is clogged, not bent, the wire connecting the sensor to the board may have broken or oxidized. Solder or strip the wire.

e34

Error e34 means a malfunction of the air relay when the fan is running. What to do - check the relay and replace it if necessary.

e108

Error e108 means a pressure drop in the heating circuit. The cause and solution of the problem is described above in the description of code 108.

sp2

Error sp2 (5p2) means that the second ignition attempt is unsuccessful. If the boiler does not start, there may be several reasons - there may be a problem in the ionization sensor, low gas pressure, insufficient air flow, removal of combustion products. Check the operation of the sensor, the gas valve may be closed or not open enough, open the window and the door, check if the chimney is clogged.

Ionization electrode

sp3 (5p3)

This DTC is described in Frequently Recurring Errors.

1p1,1p2 (ip2)

Error 1p1, 1p2 (ip2) appears in case of poor or no water circulation. The causes and solution of the problem are similar to code 108 and are described above.

6p1

Error 6p1 appears when there are problems with the air supply and smoke removal, the relay is delayed. to eliminate the problem, check whether there is enough air in the room where the boiler is installed, whether the chimney is clogged, whether the relay contacts are stuck.

6p2

Error 6p2 also occurs when there are problems with smoke removal and air intake, and the contacts of the combustion product pressure switch open during normal operation of the fan. The solution to the problem is the same as when the code 6p1 appeared.

Boiler pressure switch Ariston

Other breakdowns

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

• 608 - the system generates such an error when the fan has started working, but the pressure switch has not worked.
• H45 - the last two digits may vary. 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, the water flow sensor is most likely faulty, clogged with debris.

  Another reason may be that the turbine blades have worn out a lot, stuck to the body, 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 performance, measure the resistance on 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 have worn out, replace them.

NTC sensor

How to determine the error code if there is no display on the device or without a dial, such as on the Ariston BS II 24FF model? Such a device is equipped with indicator lights, thanks to which you can determine the breakdown. So, for example, if indicator 90 and a crossed-out water drop icon are on, this means that overheating has occurred and the boiler is blocked. To eliminate it, it is necessary to check the pressure switch and its connection to the board.

Search for breakdowns and malfunctions in boilers Ariston BS

The gas boiler Ariston BS 24 cannot start. When you hold the on/off key, the burner is working. If you press the key, the unit immediately goes out. Can you tell me the reason for the failure?
Probably, the thermocouple has failed or the gas valve has failed. There may also be a reduced gas pressure in the inlet pipeline. Sometimes there is a lack of voltage on the electronic board.
There was a problem recently. The start is very difficult. The ignition device ignites, but the main burner does not fire. I can't understand what is the reason?
Apparently, damage to the parts of the ignition unit. The unit must be serviced and the igniter must be cleaned.
Why did the wall-mounted boiler Ariston BS 15 FF stop turning off when the set temperature was set? Heating goes up to 85 degrees, then it gives out a breakdown. After the restart operation, the cycle starts again.
Apparently, the board is out of order, the temperature sensor has a malfunction, the overheating protection button has broken. It is possible that there was a failure of the automation settings.
I would like to know why the boiler does not heat water above 70C? I need to set more, but the screen shows that this is the maximum setting. How to increase heat?
If the unit does not increase the temperature of the heating circuit, the following factors can be assumed. In the settings, a limit is set for the maximum heating temperature not higher than 70C. There is a decrease in draft in the chimney.
Ariston BS II 24 FF does not perform its functions satisfactorily in the mode of heating the DHW system. From the tap flows alternately cold water, then hot. Tell me, what is causing this error?
Factors causing the problem may be as follows. Cold water is mixed in due to the failure of the three-way valve. The heat exchanger is clogged. Need to clean it up.
There is a faucet under the boiler, water leaks regularly from it. The unit itself does not work. What needs to be done?
Apparently, there is a coolant discharge from the safety valve. This symptom indicates an increase in pressure in the system. In addition, the system make-up valve may be open or the expansion tank should be pumped up.
Explain why there is a strong increase in pressure, and at the same time the safety valve opens? The display always shows the heating icon in the heating cycle of the appliance. What to do?
There is a breakdown temperature sensor heating circuit. There is no normal circulation in the heating line.
What is the breakdown when the BS 24 FF gas boiler began to turn off constantly? Let's say today the piezo ignition failed to work at all. Boiler maintenance was done at the beginning of the month. What could be?
We can assume that there are malfunctions in the smoke output device. You must perform a chimney inspection. Incorrect operation of the electric ignition will mean damage to any part in the event of a power surge or water intrusion.
Can you help me with the chimney please? Already 2 days ago there was a reverse draft, while the smoke began to fall directly into the room. I made the chimney myself. It consists of a metal pipe. It looks like there was a mistake in the calculations.
The boiler works fine on hot water, and when you turn on the heating, the water quickly comes to a boil, and the device stops working. What is the problem, and how to fix it?
Perhaps the circulation pump is inoperative, the control board has failed, the temperature sensor is defective. It is also possible that the filter mesh is clogged.
At the DHW stage, the unit alternately began to produce either cold or hot water. Please help me understand what is causing this. How to regulate water heating?
Apparently, the heating system is dirty or the heat exchanger needs to be cleaned. In addition, the pressure control sensor may be faulty or the circulation pump may be faulty.
The main reason may be an incorrect configuration of the chimney channel. Sometimes there is soot pollution, which sufficiently reduces its efficiency. In addition, it is recommended to check the ventilation in the room.
The gas boiler Ariston BS is in operation. The device instantly sets the temperature to 96 C, and then rises due to overheating. In the future, when it cools down, it goes to reboot. How to fix a breakdown?
Failure of the overheating functions indicates a lack of circulation in the system. It is mainly necessary to control the position of the radiator valves. They need to be opened. After that, the filter element is checked for contamination, and it is also necessary to make sure that the heat exchanger does not contain dirt.
Completed the connection of this unit in 2015. Approximately 2 months later, the device began to make a sharp noise. Explain why the noise occurs?
Most likely, there is scale in the heat exchanger. If the water is hard, then over time, lime will be deposited on the walls of the radiator pipes.
I am going to connect the Ariston BS II 15 FF boiler to heat the house. Can you please tell me the correct way to put it into operation?
For the correct start-up of the boiler apparatus, the following steps must be taken. We connect the power supply of the device. We open the gas valve. Then we start the burner. Then adjust the desired temperature.
We want to do maintenance. Advise how to drain the coolant from the device?
In accordance with the manual, this work is done as follows. We disconnect the device from the network. Close the gas valve. Open the automatic air vent. Open drain cock. Next, collect the spilled water. Otherwise, you can drain the water using the relief valve. This valve is located at the bottom of the apparatus.
Explain to me how to diagnose a 3-way valve? I think it doesn't open correctly. In the heating mode, it weakly pumps distant batteries, however, on the hot water supply, a pipe is heated to supply heating water under the boiler unit.
That's right, it is necessary to inspect the three-way valve for stem acidification in the intermediate state. We also recommend diagnosing the heating system itself.
I have a BS 24 CF boiler in my house. So far, it has been working properly. At the moment, after 1 minute after the start, the device goes out.
It seems that he is unable to catch water in the system. Explain what is the reason? A likely factor in this damage may be the ignition electrode, which does not see the flame, or the lack of circulation.
Just yesterday, trouble with this unit came to light. While working, he began to whistle. I tried restarting - it worked, but there was no change. Perhaps someone can tell me what's wrong?
Very often, a sharp whistle occurs when the pressure setting on the nozzles of the gas burner is incorrectly adjusted. Need to check settings gas pressure and correct if necessary.
Water has recently been poured into the boiler, and the unit began to function with errors. For example, if you set any temperature, and the heating mode reaches only 22 degrees, and then the unit stops. Could you suggest what happened?
If water gets on the control board unit, it can be assumed that it does not work correctly. We advise you to reset it by completely turning off the unit from the mains. Then turn it on again and test its performance.
A device of the same model was put into operation two years ago. Today, at the moment of launch, the wick burns for 8 seconds, but main burner does not support the flame, and because of this, the device goes out. How can you fix a breakdown?
Probably the ignition switch is faulty or there is a problem with the burner. In any case, it is necessary to check whether the phasing is broken at the time of connection to the electrical network.
Performed independently in the middle of this year the commissioning of the same model. Somewhere after 4 months, a failure occurred in the DHW circuit, but the heating mode is working normally. I tried to open a hot water tap, but the device only displays the temperature, and does not even think about heating. Why is the DHW not working?
Most likely, the 3-way valve is faulty. It must be replaced.
Tell me, why is the boiler equipped with a safety temperature sensor?
This part shuts off the gas supply to the burner when the water in the main heat exchanger overheats.
The primary heat exchanger needs to be flushed and cleaned. Can you tell me what I need to do in order to professionally disconnect it?
The main heat exchanger is easily removed from the boiler unit using a conventional screwdriver. Below is the dismantling procedure. We drain the water from the device using a drain valve. Then we empty DHW system. Loosen the screws securing the heat exchanger and pull it out of the frame.
Started up this unit. Presumably, after three months, the water pressure in the apparatus decreased. Often he slows it down and stops working. In other words, it does not hold pressure at all. Why is this happening?
If the appliance does not increase the water pressure, the feed valve is probably leaking. When a shutdown occurs and the water pressure drops sharply to zero, the 3-way valve is damaged.
Tell me how to clean the cold water filter?
The initial stage is to drain the water from the DHW circuit. Secondly, unscrew the flow sensor nut. Then we take out the sensor and the filter from the cavity. After that, we clean from the accumulated impurities and dirt.
The device at startup and earlier could hum, and in given time makes a lot more noise. Initially, the sound disappeared quickly, but now it lasts longer. Has anyone observed such a problem?
The appearance of excess noise indicates the presence of mineral deposits inside the heat exchanger, the heating of which occurs unevenly due to different wall thicknesses. The more contaminated the heat exchanger, the more pronounced the roar, and accordingly the heat transfer decreases.
The unit is functioning, although water does not appear to be circulating in the system. The return pump heats up noticeably. How to fix it?
Apparently, the mud filter is clogged or a tap is closed somewhere, which interferes with the passage of the coolant. The circulation pump may also be faulty.
What causes hot water to stop heating? The water comes out very warm. Explain what happened?
The problem is solved in the following directions. If the DHW temperature sensor is damaged, it must be replaced. Perhaps there was a failure in the power settings of the device for heating domestic hot water.
Periodically, a break in the flame is observed during ignition. The burner is clean, everything is in order with the chimney, the draft is good. What could be the problem?
The unit does not detect a spark due to a weak signal from the combustion mechanism. Here you need to check the wire between the ionization sensor and the electrode. Probably needs to be tightened up. There may also be damage to the sensor insulation, which must be replaced.

• gas boilers
• Electric boilers
• Boiler error codes
• Troubleshooting boilers
• Geysers
• Malfunctions and repair of geysers
• Water heaters
• Troubleshooting water heaters
• Repair of indirect heating boilers
• Troubleshooting in electric convectors

• BAXI ECO FOUR

Heating system control. Mounting. Connection. Transfer to another type of gas. Control devices and protection devices.

• BAXI LUNA

Peculiarities. Installation and installation. Automation components.

• BAXI MAIN FOUR

Technical specifications. Mounting. Adjustment and verification. Maintenance.

• BAXI SLIM

regulation and protection. Installation and installation. Pressure setting. Maintenance.

• BAXI - REPAIR

There was a problem after starting. It doesn’t want to turn on, it worked for two years, now the whole display lights up as if the boiler was turned on, when the self-diagnosis mode is on, then it clicks, turns off for miles and seconds and turns on the entire display again. It turned on once, but gives an error E10 water pressure, although the pressure in the system is 1.5 atm. Tell me what can be?

• BAXI - OPERATION

• BAXI - SETTINGS

We installed and connected the Baxi Fourtech 24 F boiler. What cold water pressure is allowed at the inlet to the DHW apparatus?

• BOSCH - REPAIR

Bosch boiler 6000 24 kW, single-circuit with built-in three-way valve. Does not see the boiler sensor, gives an error. Tell me how to make it not give an error and work normally both for heating and for the boiler?

• BOSCH - ADJUSTMENTS

If you turn off the DHW flow sensor, then maybe it will be possible to reprogram it into a single-circuit device through the L3 menu?

• ARDERIA - REPAIR

Installed boiler Arderia esr 2.13 ffcd. If my coolant pressure drops a little in 2-3 days by a couple of divisions, can the three-way valve malfunction be the reason (there are no leaks from the radiators)?

• ARDERIA - ADJUSTMENTS

In operation, the gas boiler Arderia 2.35. Tell me about power reduction. Heard something about modulation, fan speed and so on. Is it really possible to reduce power?

• BUDERUS FLOOR

We installed and connected the Buderus Logano G234-WS-44 kW boiler, Logomatic 4211 automation. Heating on cylinders without hot water supply, jets for reduced gas were also replaced. We survived the winter, the cylinders were replaced, all without problems. Then in the spring, when the temperature outside was +16 + 18, the boiler began to turn off for a long time and, when turned on, it began to give a burner error on the screen and a red button light on the front wall lit up. We pressed the button, turned on the power again and everything worked. It happened several times, then the boiler was completely turned off for the summer, what could be the problem?

• BUDERUS WALL

In a single-circuit Buderus 072, is the BKN coil circuit heated by the same heat exchanger as for heating or the same as on a 2-circuit one that is used for hot water supply?

• VAILLANT - REPAIR

Tell me, for Vaillant wall-mounted gas boilers, are there any real / actual differences for the better in the new generation turboTEC plus VU / 5-5 compared to / 3-5?

• VAILLANT - ADJUSTMENTS

The boiler is malfunctioning, the green LED (power) is flashing, the instructions say that the thermal protection has tripped, the green indicator is flashing, even if nothing is connected to the board. How to fix? I checked all SMD resistors and transistors, everything is in order.

• DAEWOO

In operation, a double-circuit gas boiler Daewoo Gasboiler with an electronic panel. When the hot water supply is turned on, the heating is heated, the operating mode is summer. Removed the three-way valve, there is no dirt and no production. It seems that the board does not control the three-way valve. How to check?

• ELECTROLUX

Installed and connected wall-mounted boiler Electrolux Basic Xi. A problem began that the boiler stopped seeing the flame and turned off the gas supply after 7-8 seconds. And after 3 attempts gave an error E1. How can I fix it?

• KOREA STAR

Koreastar boiler malfunction. Heating works great, hot water is coming intermittently, when you turn on the hot water tap, cold water comes first, then boiling water. After a few seconds, cool, then again boiling water. What could be the problem?

• FERROLI

Ferroli domiproject 24 boiler malfunction - I set 60-70 degrees, it switches to minimum combustion, does not turn on, does not turn off. Restart is unstable. No pattern emerges. What to do?

• JUNKERS

In operation, the Junkers euroline gas boiler, when hot water is turned on, ignites the gas, then goes out and so on several times. If you turn it on while the heating is running, then the water heating turns on immediately. Tell me, please, what could be the problem?

• NAVIEN

Tell me about the adjustments of the gas boiler Navien Ace 16 turbo remote control v1.3. Unable to adjust fan overrun. I put 30 seconds, but still 2 minutes. turns.

• OASIS

Malfunction of the boiler Oasis ZRT18. The unit starts, gas lights up, then goes out. It lights up again, goes out (it happens three times). Then it fires up and works fine. Doesn't throw any error. What is the reason?

• SAUNIER DUVAL

Malfunction of the gas boiler Senor Duval - the water pressure sensor shows 0.0, the indicator flashes red, hot water is not heated, but the water pressure in the apartment is good. How to troubleshoot?

• VIESSMANN

In which place coaxial chimney Should a condensate trap be installed? Boiler wh1d with a closed combustion chamber, located at a distance of 1m from the wall.

• WESTEN

The problem of starting the Westen Pulsar D boiler. The piezo ignition works, but there is no flame, after the crackling error E01. Swapped the fork.

• BERETTA

The floor-standing gas boiler Novella is blocked - the green lights on the panel are on, and nothing else happens. How to fix?

• ARISTON

The Ariston gas wall-mounted boiler is installed and connected, which does not hold pressure at all: during the cooling of the heated water, the pressure drops to zero, although water is regularly drawn in. What about pressure?

Boiler malfunction metropolis dgt 25 bf. The DHW stopped working, the heating works, it does not give an error. What do you advise?

• SOLLY

Please tell me how to solve the problem. The Solly Standard boiler, with any attempt to turn it on or hot water, gives a GS error.

The Wolf boiler is in operation. Recently, he began to behave strangely: in the pause between starts, he turns on the burner for one second five times, and 70 degrees pops up on the display. Where to look for a malfunction?

ACV Wester Line is very unstable: it often crashes, it makes a characteristic knock and stalls at startup, but at times everything is fine. The unit is almost new, what's wrong with it?

• DEMRAD

In the gas boiler, Demrad stopped supplying gas to the burner. The piezo element clicks, but there is no ignition. Everything is in order with the gas stove, there is gas. What is the reason?

• KITURAMI

Malfunction of the Kiturami world boiler, periodically stops. I wipe the flame sensor, and the device works well for a while, but soon everything repeats. He also began to smoke heavily. Maybe it's a short chimney, and it needs to be lengthened?

• IMMERGAS - ERRORS

Nike Star, Eolo Star/Mini, Mythos boiler errors. Malfunctions of boilers with the possibility of automatic unblocking.

• IMMERGAZ - REPAIR

I have a boiler winter mode regularly raises the temperature to 80 degrees. Called the technician three times. He said that many imergaz models have it, and suggested installing a programmer, but not the fact that it would help. Tell me how to solve this problem and will this programmer help?

Models 11.6; 17.4; 23.2; 29.3 kW. Specifications. Control elements of the automation unit. Installation and maintenance. Malfunctions and their elimination.

• AOGV - REPAIR

The AOGV gas boiler was installed and put into operation. Problem with hot water supply. The heat exchanger was washed. Less than a month has passed, and the water is not flowing again. They put a filter on the water, but time passed, and again not going hot water. What could be the breakdown?

Mounting and installation. Startup and adjustment. Malfunctions and ways of their elimination.

Technical specifications. Installation and connections. Startup and operation. Automation settings.

• NEVA LUX

Malfunction of the boiler Neva Lux 7023. With a frequency of 2 times a month, it gives an E7 error. But after a reboot it still works. Now gives error E6. Works for 15 minutes and then turns off. What could it be?

Construction and automation unit. Ignition order. Faults and repairs.

• ATEM ZHYTOMYR

Tell me, is it possible, because of the weak pressure of the gas, the Atem Zhytomyr boiler goes out, a click occurs and goes out. What is the problem? Is it possible to temporarily turn off the automation and how?

• LEMAX

We installed a gas boiler Lemax KSG-12.5 Premium. After turning off the main burner, a click occurs after a couple of minutes, what is the reason for that?

• KEBER

Installed and connected gas boiler KS-G, 250 sq. m. When ignited, it does not turn off, the temperature rises, if I am not mistaken, Arbat 1 automation. The flame is not regulated - too large. What to do?

I installed the Mayak gas boiler and connected it. It works fine. But here's the reason. When he works on the unit, he squeaks strongly, if the regulator is turned 2-7, the squeak disappears. Tell me what can be?

• DANKO

They installed and connected the Danko gas boiler with Kare automatics, it works fine on the igniter, but as soon as you add power to the burner, it completely fades out, it died out for 5 minutes yesterday, today it works for 20 minutes and completely goes out. Who faced such problem?

• GAZLUX

The gaseco 18 boiler is in operation. When the hot water is turned on, the pressure in the system drops after replenishment, the pressure reaches 3 bar. Have to drop. What's wrong, how to fix it?

• NOVA FLORIDA

Water often boils in the boiler, while it goes into an overheating accident. The heat exchanger was recently washed, the system is not clogged. What's the matter?

• RINNAI

Malfunction of the Rinnai 167 RMF boiler. Recently it began to show error 14. How can I fix the breakdown?

• CELTIC

The Celtic ds boiler heats up to 45 degrees and stays all day long and does not turn off and does not heat the batteries, sometimes it shows an a3 error. How can this problem be fixed?

Models Clas, Clas Evo, Genus

Ariston Clas

Gas wall boilers Ariston Clas: 24FF, 24CF, 28FF/CF, 15FF/CF, 32FF

SIT 845 SIGMA gas valve - Ariston Class boilers use a SIT 845 SIGMA gas valve with two electromagnets powered by 220 V alternating voltage to supply and cut off gas to the burner. To regulate the gas flow at the outlet of the valve from the ECU in accordance with the readings of the temperature sensors, a low-voltage (24 V) regulator is used. This unit is used for both natural and liquefied gas. The valve is also equipped with a NAC504 that supplies voltage to the main burner ignition transformer and valve. The valve is designed to work with different gases without replacement constituent parts. Only the injector needs to be replaced. Gas pressure at the inlet to the valve - no more than
6 kPa (60 mbar). Components: gas supply to the burner, supply pressure sensor, maximum power adjustment nut, inlet pressure sensor, inlet fitting, ignition device, minimum power adjustment screw, compensator.

Adjustment of gas parameters

Inlet pressure check:

Loosen the screw and connect the manometer tube to the inlet pressure tap.
- Set the boiler Ariston Clas 24 FF / CF, 28 FF / CF, 15 FF / CF, 32 FF to maximum operating power (DHW valve open). The gas pressure at the inlet to the apparatus must correspond to the passport for the type of gas for which the apparatus is designed.

Checking the maximum power in DHW mode:

To check the maximum power, loosen the screw and connect the manometer tube to the pressure tap.

- Run the machine at maximum power in the "Chimney sweep" mode (press the Reset button and hold for 5 s.
- The gas pressure at the inlet to the apparatus must correspond to the passport for the type of gas for which the apparatus is designed. Otherwise, remove the protective plug and adjust the pressure with the hex nut.
- After checking, tighten the screw and check for tightness.
- Install the protective cap on the regulator.

Checking the minimum power:

To check the minimum power, loosen the screw and connect the manometer tube to the pressure tap.
- Disconnect the air chamber compensator tube.
- Start the Clas System boiler at minimum power and disconnect the cable from the regulator. The gas pressure at the inlet to the apparatus must correspond to the passport for the type of gas for which the apparatus is designed. Otherwise, adjust the pressure with the screw while holding the hex nut in place.
- After checking, tighten the screw and check for tightness.
- Connect the cable to the controller.
- Connect the compensator tube.

Power check in soft ignition mode (Performed using parameter 220):

To check the power in soft ignition mode, loosen the screw and connect the pressure gauge tube to the pressure tap.
- Disconnect the air chamber compensator tube (sealed chamber).
- Open the DHW valve. In the Ariston Klas boiler, the burner is ignited. Disconnect the flame detection electrode so that the pressure corresponding to the soft ignition mode is maintained for 8 seconds without a safety shutdown.
- Change parameter 220.

Adjustment of the heating start delay: Regulation is carried out using parameter 236. The boiler allows adjustment of the delay time from the receipt of the heating command to the ignition of the burner in the range from zero to 7 minutes. The regulation is carried out using parameter 236.

Adjustment of the maximum heat output: The appliance has two different maximum outputs: in DHW mode and a lower value in CO mode (absolute maximum value). The absolute maximum heat output is set in parameter 230. This parameter must only be checked and, if necessary, modified in the event of a changeover to another gas group. To control the heat output in heating mode, it is possible to control the maximum heat output (in the range from the minimum to the absolute maximum value). The boiler allows you to adjust the delay time from the receipt of a heating command to the ignition of the burner in the range from zero to 7 minutes. Regulation is carried out using parameter 236. Regulation is carried out using parameter 231. The device allows you to regulate the maximum value of the heating output.

Main burner - In the Ariston Clas 24 FF / CF, 28 FF / CF, 15 FF / CF, 32 FF boiler models, Polidoro burners with a nozzle pitch of 19.0 mm are used. The electrodes (two ignition electrodes and one flame control electrode) are combined into a block. The gap between the ignition electrodes should be 4 ± 1 mm, the distance between the electrodes and the burner should be 8 ± 1 mm. Distance between flame detection electrode and burner
should be 8 ± 1 mm. If the burner does not ignite after the safety delay has elapsed, code 501 is displayed on the control panel indicator. The ion current must be at least 1 μA. The voltage at the electrode relative to ground is 110 VAC.

ignition cycle. In CO and DHW modes, ignition is carried out in two ways:

DHW - If necessary, three ignition attempts are made: 1st attempt - at a power corresponding to the soft ignition mode; if at the end of the protective delay (8 s) the flame is not detected, a 5P1 signal is generated, the Ariston Class 24 ff boiler makes a second attempt; 2nd attempt - on the power of soft ignition; if at the end of the protective delay (8 s) no flame is detected, a 5P2 signal is generated; the device makes the 3rd attempt; 3rd attempt - on the power of soft ignition; if at the end of the safety delay (8 s) the flame is not detected, the burner is turned off, signal 501 is generated, the fan shutdown is delayed by 40 s, during which the fan runs on
maximum speed, then for another 2 minutes - at the minimum frequency.

CO - If necessary, three ignition attempts are made: 1st attempt - at 80% of the power corresponding to the soft ignition mode; if at the end of the protective delay (8 s) the flame is not detected, the signal 5P1 is generated, the device makes a second attempt; 2nd attempt - at 90% of the soft ignition power; if at the end of the protective delay (8 s) no flame is detected, a 5P2 signal is generated; the device makes the 3rd attempt; 3rd attempt - on the power of soft ignition; if at the end of the safety delay (8 s) the flame is not detected, the burner is turned off, signal 501 is generated, the fan shutdown is delayed by 40 s, during which the fan runs at maximum frequency
rotation, then for another 2 minutes - at the minimum frequency.

Electrical and electronic systems of the boiler Ariston Clas

ECU main board - The GALILEO-MCU ECU board is used in the machine. With its help all operations on control, management and display on the liquid crystal display of the user interface are carried out. To protect the GALILEO-MCU board, a 2 A, 250 V AC fuse link and a varistor are provided that smooth out voltage surges up to 275 V. The supply voltage from the AC mains is 230 V + 10% -15%, phase and neutral are not required when connected.

Connection of peripheral devices - The boiler allows connection of the following peripheral devices: room thermostat, timer-thermostat (also available in wireless version); room sensor (also available in wireless version); outdoor sensor; remote control panel "Remocon" (also available in wireless version).

Programs Menu 2: Ariston Clas System boiler parameters

21 - Access code - Turn the knob (counterclockwise) to set the value 2 3 4.
220 - Delayed ignition in % of the maximum heat output - From 0 to 99.
221 - The lowest temperature for switching to frost protection mode (C) - From 2 to 10.
222 - Fan speed adjustment - 0: disabled; 1: allowed.
224 - Mechanical timer - 0: disabled; 1: enabled.
225 - Adjustment of heating start delay - 0: disabled;
228 - Modification of the boiler - 0: double-circuit; 1: with BKN;
230 - Absolute maximum heat output - From 0 to 99.
231 - Maximum heat output (as a percentage of the absolute maximum heat output) (%) - From 0 to 99.
235 - CO delay control mode - 00: manual (set using parameter 236) / 01: automatic (in "Automatic" mode).
236 - Heating delay (min), enabled if parameter 235 = 0 - 0 to 73.
237 - Delay off circulation in CO mode (min) - From 0 to 15; CO: non-stop.
238 - Pump speed control in CO mode - 0: fixed. rotation frequency 2; 1: fixed rotation frequency 3; 2: adjustable.
243 - Ventilation shutdown delay when CO is turned off - 0: 5 s, 1: 3 min.
244 - Forced heating (min) - From 0 to 60 (in the "Automatic" mode).
247 - Node for measuring pressure in the CO circuit - 0: temperature sensors only, 1: pressure switch, 2: pressure sensor.
250 - Comfort mode DHW - 0: disabled; 1: switched on for 30 minutes after the command for DHW; 2: always on.
251 - Preliminary cycle of the "Comfort" mode, min - From 0 to 30.
252 - DHW start delay (water hammer protection), s - From 5 to 200.
253 - DHW shutdown logic - 0: anti-scale protection (62 or 65 C). 1: setting +4 C.
254 - Delay for switching off circulation and ventilation in DHW mode - 0: delay for switching off ventilation, 1: delay for switching off ventilation: 3 min.
255 - Delay start CO after DHW, min - From 0 to 30.

Protective devices - In the event of a malfunction, two types of reaction of the boiler Ariston Class 24 ff are possible: Stop (restart when reset with the "Reset" button); Protective shutdown (resetting with the “Reset” button is not possible; to restart the device, it is necessary to eliminate the cause of the malfunction). If the malfunction is not accompanied by a shutdown of the machine, a third type of error message (alert) is displayed. In the event of a shutdown or a safety shutdown, the display alternately displays the corresponding error code and the inscription "Err".

Ariston Clas boiler error codes

Error codes are distributed across six functional subsystems. The first digit of the code indicates to which functional subsystem of the device the corresponding malfunction belongs: Primary circuit; DHW circuit; ECU; Data exchange with peripheral devices; Ignition and detection; Air supply and removal of combustion products, Zones.

101 - Overheating.
103 - Circulation or presence of water: Gradient Tsub. 7 C/s 3 times.
104 - Circulation or presence of water: Gradient Tsub. more than 20 C/s or gradient Tabr. more than 20 C/s.
105 - Circulation or presence of water: 55 C/s 3 times.
106 - Circulation or presence of water: + 10 C 3 times.
107 - Circulation or presence of water: + 30 C Reset.
110 - Temperature sensor at the supply to the CO circuit (NTC 1) - short circuit or open circuit.
112 - Temperature sensor at the supply to the CO circuit (NTC 2) - short circuit or open circuit.
114 - Outdoor temperature sensor - short circuit.
116 - Room sensor - open circuit.
1P1 - Circulation or presence of water: Gradient Tsub. more than 7 C/s.
1P2 - Circulation or presence of water: Tsub. – Tabr. over 55 C.
1P3 - Circulation or presence of water: Tabr. over Tsub. + 10 C.
201 - DHW supply sensor (NTCs) - short circuit or open circuit.
202 - Low temperature sensor in the drive - short circuit or open circuit.
203 - Switch on sensor - short circuit or open circuit.
204 - Sensor in the solar collector - short circuit or open circuit.
205 - Cold water inlet sensor (solar) - short circuit or open circuit.
206 - Sensor at the inlet to the DHW circuit (from the solar system) - short circuit.
207 - Overheating of the solar pipeline.
208 - Low temperature sensor for solar pipeline (frost protection).
209 - Drive overheating.
301 - EEPROM display failure.
302 - Malfunction of the exchange GP - GIU.
303 - Internal error of the Clas System boiler ECU.
304 - More than five resets within 15 minutes.
305 - Internal ECU error.
306 - Internal malfunction of the computer board.
307 - Internal error of the computer board.
401 - Communication error between modem and bus.
402 - GPRS/GSM modem malfunction.
403 - Modem SIM card error.
404 - Communication failure between the modem and the board.
405 - Modem error.
406 - Modem failure.
407 - Room temperature sensor - short circuit or open circuit.
501 - No flame.
502 - Flame detected with gas valve closed.
5P3 ​​- Flame failure during operation.
601 - Sensor for overheating the flue of combustion products (only in devices with an open chamber).
602 - Sensor for overheating of the flue gas flue (only in devices with an open chamber, type VMC.
607 - The pressure switch worked before the start of the ignition sequence.
6P1 - Delay in closing the contacts of the pressure switch.
6P2 - Opening the contacts of the pressure switch when the burner is running.

Ariston Clas Evo

Modifications of gas boilers Ariston Clas Evo: 24 FF, 24 CF, 28 FF, 15 FF

Boiler hydraulic unit

Right hydraulic unit - Modular unit with built-in functional elements: CO and DHW filter. All elements are attached to the clamps. Pump block with deaerator valve. Brass fittings for mounting. Filling tap.

Left hydraulic unit - Modular unit for supplying hot water to heating and hot water circuits: CO safety valve 0.3 MPa (3 bar). Automatic bypass. Brass fittings. All copper pipes are attached with clamps.

Three-way valve- The three-way valve is used to change the distribution of water (to the heating circuit or to the secondary heat exchanger). The valve is controlled from the electronic control unit (ECU) through a relay contact. The valve consists of a body made of composite material, and an electric drive (engine). When the machine is in standby mode, the valve is in the “SANITARY” position. Procedure for switching the 3-way valve. The boiler is in standby mode, the valve is in the “SANITARY” (DHW) position: When the heating is switched on: the start of the operating cycle in the “Heating” mode is delayed by 7 s (time required for the valve to switch electrically from “DHW” to “CO” ). When a command is received for DHW: the unit immediately starts operating in the “DHW” mode.

Valve in position “HEATING” (CO): When a DHW command is received: the valve switches from “CO” to “DHW”, while the pump and burner continue to work. After receiving a command for DHW: if the command for heating is not canceled, the pump and the burner are switched off for 7 s (the time required for the valve to switch from “DHW” to “CO” by means of an electric actuator. The Clas Evo System boiler starts working again in the “Heating” mode "". The 3-way valve is driven by an easily dismantled ELBI electric motor. The electric motor can be replaced without draining the water from the boiler. It is enough to remove the lock and disconnect the power wire. The signal from the ECU goes to the engine in accordance with which mode (CO + SHVS or DHW only) is set on the control panel.The valve has two limit switches (right/left) that cut off the servomotor when the required position is reached.

Secondary heat exchanger - The secondary heat exchanger of the Ariston Klas Evo 24 ff boiler is attached to the hydraulic unit with two screws. The screw holes are located asymmetrically on the heat exchanger housing, so that it can only be installed in the correct position. Descale protection temperature setting - Aims to reduce the formation of scale in the secondary heat exchanger. In DHW mode, the burner turns off and on depending on the readings of the NTC1 and NTCs temperature sensors.

Pump block. Pump type: models 24 and 28 kW. Wilo MTSL 15/5 HE-2; model 32 kW. Wilo MTSL 15/6,7-2 CLF12. The ECU allows you to control the switching of the circulation pump from one speed, V2 (55 W), to another, V3 (80 W). In DHW mode, the pump always runs at V3 to ensure the best heat transfer. In heating mode, the pump can operate at one of two speeds. The value is determined by the temperature difference at the water supply to the heating circuit and the return fitting (dT). Procedure: Tsub.-reverse. T - 2 C more than V2; Tsub.-reverse T is greater than V3 where T= 20C (set by parameter 239 between 10 and 30C).

Switching to both lower and higher speeds is carried out with a delay of 5 minutes (unchangeable value). Parameter 238 of the Ariston Klas Evo boiler allows you to prohibit switching the pump from one speed to another: 0: fixed. rotation frequency 2; 1: fixed rotation frequency 3; 2: adjustable. The anti-sticking system turns on the circulation pump and the 3-way valve for 15 seconds every 21 hours from the last action. The value of parameter 823 can be used to monitor the pump speed, or the voltage (AC) between pins 5 and 6 of connector CN10 of the electronic control unit can be measured: 145 V: maximum speed; 0 V: lowest speed;

Filling the heating circuit manually - The procedure for filling the CO circuit (empty) is as follows: Open the tap at the inlet of the cold mains water. Remove the deaerator cap. To open the filling valve, use the magnetic key (fixed under the hydraulic unit) to set the filling valve to the valve open position, the filling of the CO circuit starts.

Semi-automatic heating circuit make-up - The “Semi-automatic make-up” mode should only be used if the primary circuit needs to be made up. Do not use to fill an empty system. An alternating voltage of 230 V is supplied to the solenoid valve of the recharge (pins 1 and 2 of the CN12 connector of the computer), a resistance of 3.7 kOhm. In DHW mode, this mode is not active. Parameter 248 allows semi-automatic make-up to be disabled: 0: disabled; 1: allowed.

If the pressure in the system is less than 0.6 bar, the make-up mode is activated, the icon is displayed on the display of the Clas Evo System boiler; in this case, pressing the button 13 starts the cycle “Filling the system”:

The three-way valve switches to the CO position;
- If the pump was turned on, it turns off;
- if the burner was turned on, it turns off;
- after the first filling, pressure control is carried out; if the control result is negative, an error message 1P5 is generated (between B and A);
- control of constancy of pressure is carried out; if the control result is negative, an error message 6P1 is generated (between C and B1);
- to achieve the set pressure value, a second filling cycle is carried out.

Ariston Clas Evo boiler error codes (when filling)

Error 102 - The pressure sensor is not connected or there is a short circuit in it.
Error 109 - The pressure is higher than the maximum (3 bar).
Error 111 - The pressure is below the minimum (0.4 bar).
Error 1P4 - The pressure is lower than displayed (0.6 bar).
Error 1P5 - The first filling cycle was not completed successfully (the pressure in the boiler did not increase): press the appropriate button and try to fill again.
Error 1P6 - Pressure constancy control gave a negative result: press the appropriate button and try to fill again.
Error 1P7 - More than 5 filling cycles in 50 minutes, the filling button is blocked (to reset: disable and re-enable).
Error 1P8 - More than 6 filling cycles in 7 days, the filling button is blocked (for reset: Off-On).

Pressure sensor in the heating circuit - The proportional pressure sensor is designed to measure the pressure in the primary circuit. The measured value is displayed on the display of the boiler Ariston Class Evo 24 ff. The control is carried out by measuring the voltage ( direct current) between pins 8 and 9 of connector CN04. Correspondence of voltage and pressure values: 0 bar = 0.3 V, 1.5 bar = 2.5 V, 3 bar = 4.8 V. and exit), a protective shutdown 102 is carried out.

Bypass - The bypass in the boiler switches automatically, this unit does not need to be adjusted. In the event of pressure loss in the CO circuit due to thermostat or zone valve operations, the bypass ensures that the water flow through the main heat exchanger is at least 350 l/h. In addition, an automatic bypass prevents overheating of the heat exchanger, which can occur if there is insufficient water flow. In this case, the temperature in the boiler is adjusted in the usual way, when the temperature setpoint is reached, the burner is turned off. The bypass is located in the supply unit and is interlocked with a three-way safety valve.

Primary heat exchanger - The primary heat exchanger of the Ariston Clas Evo 24 FF, 24 CF, 28 FF, 15 FF boiler is made of copper with an anti-corrosion silicone coating. It is designed to transfer the heat of combustion products to water in the primary circuit. There is an overheating sensor with automatic reset, triggered at 102 ± 4 C. Model - Number of fins / dimensions: 24 CF - 82 / 260 x 180 mm, 28 CF - 89 / 300 x 180 mm, 24 FF - 91 / 260 x 180 mm, 28 FF - 91 / 260 x 180 mm, 32 FF - 105 / 300 x 180 mm .

Expansion tank- When the water temperature rises, the expansion tank compensates for the increase in its volume. The tank consists of two compartments separated by a styrene-butadiene rubber membrane. One compartment is filled with nitrogen, the second receives water from the primary circuit. The nitrogen compartment can shrink as the volume of water increases as the temperature rises. The expansion tank is designed for a heating system with a water volume of about 175 liters. Specifications - Capacity - 8 liters. The largest working temperature- 90 C. Nitrogen pressure - 0.1 MPa (1 bar). The highest working pressure is 3.0 MPa (1 bar).

DHW flow meter - The DHW flow meter has a turbine, which rotates the flow of water in the DHW circuit, and a speed meter, the signal from which is sent to the Clas Evo System boiler control unit. There is also a cold water filter to prevent contamination of the flow meter. In addition, there is a water hammer protection device (ECU controlled). The setting is parameter 252, which allows
set the response time from 0.5 to 20 s (default 0.5 s). The value of the water flow in the DHW circuit is indicated by parameter 825. It can also be displayed on the display by pressing the INFO button. For control, you can measure the voltage (DC) at connector CN14: 0 V = no flow; 5 V = no flow; 2 to 3 V = flow present. Water analysis is available: 100 l / h. There is no water analysis: 80 l / h.

Ariston Genus

Gas boilers Ariston Genus are designed to supply heat and are installed in residential buildings and premises. Models of wall-mounted boilers Genus: 24 FF, 35 FF, 24 CF, 30 FF.

Elements of FF models. The combustion chamber is sealed - The neck of the air supply of the two-channel gas duct, Relay air pressure, Steam trap at the inlet of the air pressure switch, Superheat sensor, Primary heat exchanger, Temperature sensor (with a negative temperature coefficient) of the heating water supply (NTC 1), Burner and electrodes, Gas valve and
spark ignition generator, DHW temperature sensor (NTCs). Safety valve 0.3 MPa (3 bar), Pump, CO return water temperature sensor (NTC 2), Infinitely variable fan, Flue gas sampler, Flue outlet for flue gases, Hall sensor.

Elements of CF models. Open combustion chamber - Flue pipe, Flue gas temperature sensor, Coolant overheating sensor, Temperature sensor (with a negative temperature coefficient) of water supply to the CO circuit (NTC 1), Burner and electrodes, Gas valve and spark ignition generator, DHW temperature sensor ( NTCs), Safety valve 0.3 MPa (3 bar), Pump, Water temperature sensor (NTC) on the CO return connection (NTC 2), Primary heat exchanger.

The order of operation of the Ariston Genus boiler in heating mode - The heating command can come from: room thermostat 1, room thermostat 2, timer-programmer, remote control remote control REMOCON and room temperature sensor. The display shows C, then the flow temperature to the CO circuit (measured by the NTC1 probe). When the machine is in standby mode, the valve is in the “SANITARY” position. When the heating is turned on, the servomotor that blocked the output of the secondary heat exchanger is activated (the shaft extends), the pump input is connected to the heating circuit. The circulation device is started with a delay of 7 s after the heating command, so that the three-way valve has time to switch; after that, the circulation device directs water from the return fitting to the primary heat exchanger.

The fan turns on (sealed chamber models). After the pressure switch trips, the machine can proceed to the next step (in this case, the pressure switch tripping is not checked again until the next restart). If the relay fails, after 20 s the machine performs a safety shutdown 6P1, the fan continues to rotate until confirmed (sealed chamber models). After the air pressure switch is activated, the gas valve and the spark ignition generator are switched on. Gas supply is carried out at the rate of 80% of the ignition power in soft mode; this value can be adjusted using parameter 220. The presence of a flame is monitored by ion current (using a control electrode). Error indication 5P1 indicates a lack of ignition.

The Ariston Genus boiler makes an attempt to ignite in soft mode (at 90% power). In case of failure, fault 5P2 is displayed on the indicator, a third ignition attempt is made at 100% ignition power in soft mode. If the third attempt is also unsuccessful, the device stops. Guard delay 8 s. For control, temperature sensors are used at the flow to the circuit and the return fitting. The values ​​of dT sub.-arr. are used. and the rate of temperature rise at the supply and return fittings. The pressure is measured with a pressure transducer. After detecting a flame in the apparatus, the heat output can be adjusted in accordance with the required heat output. Adjustment can be carried out in the entire range of thermal power values ​​- from the maximum (set from the control panel - parameter 231) to the minimum (fixed; installed on the gas valve).

The burner shutdown temperature is adjusted as follows:

1st minute after flame detection: T off = T set. + 8C
- 2nd minute after flame detection: T off. = T set. +6C
- from 3 minutes after flame detection: T off. = T set. +4C

This arrangement prevents the burner from switching off too quickly when the temperature setting is reached. It is possible to set the delay before switching on again from 0 to 7 minutes (default 2 minutes, set from the control panel - parameter 236). The pump can operate at one of two speeds. The value is determined by the temperature difference at the water supply to the CO circuit and the return fitting. Protection against overheating is carried out using a temperature sensor with automatic reset (102±4C) at the supply to the CO circuit (even when the burner is off). When the sensor contacts are opened, the burner is switched off protectively, and after 5 s, if the contacts are still open, the device is blocked (not allowing it to be turned on again by the operator), the display shows error 101. From the moment the heating command is received, the “limit temperature” signal (88 C, fixed value) comes continuously from the supply water temperature sensor to the heating circuit (NTC 1). If the circulation in the CO circuit is disturbed, it is possible to automatically switch to the bypass (capacity not more than 350 l / h).

The operation of the Ariston Genus boiler in DHW mode - The water flow in the DHW circuit is measured using a flow meter. The boiler is now operating in SANITARY mode. The display shows the letter d and the temperature setting. When the machine is in standby mode, the valve is in the “SANITARY” position. If a DHW command is received while the machine is operating in CO mode, the three-way valve switches to the SANITARY position. In this case, the circulation pump and the burner continue to work. The outlet of the secondary heat exchanger is connected to the inlet of a pump that supplies water to the primary heat exchanger. The pump (speed 3) pumps out water from the secondary outlet and sends it to the primary heat exchanger. The fan turns on at maximum speed (models with sealed chamber). After the air pressure switch has tripped, you can proceed to the next step.

If the relay does not work, after 20 seconds the device performs a protective shutdown (error 6P1), the fan continues to rotate until acknowledged (models with a sealed chamber). In models with an open chamber, instead, control is carried out by an overheating sensor (it works even during the operation of the device). If the overheating sensor of the combustion products is triggered, the apparatus stops 601. After the air pressure switch is triggered, the gas valve and the spark ignition generator are turned on. The gas supply is carried out in accordance with the heat output in the soft ignition mode (set from the control panel parameter 220). The presence of a flame is controlled by
ion current (using a control electrode). Indication 5P1 indicates the absence of ignition. The Ariston Genus 24 CF / FF, 35 FF, 30 FF boiler attempts to ignite in soft mode (at 100% power).

In case of failure, fault 5P2 is displayed on the indicator, a third ignition attempt is made at 100% ignition power in soft mode. If the third attempt is also unsuccessful, the device stops with error 501. Guard delay 8 s. To control the flow of water, temperature sensors are used at the supply to the circuit and the return fitting. The values ​​of T sub.–arr. and the rate of temperature rise at the supply and return fittings. The pressure is measured with a pressure transducer. The burner flame can be adjusted over the entire range of thermal power values ​​- from the maximum (installed on the gas valve) to the minimum (also installed on the gas valve). The burner runs until the anti-scale temperature setting is reached. This temperature is measured by the NTCs sensor in the DHW circuit. Overheating protection is provided by a temperature sensor with automatic reset (102 ± 4 C) at the heating circuit flow (even when the burner is switched off). When the sensor contacts are opened, the burner is switched off safely, and after 5 s, if the contacts are still open, the device is blocked (not allowing the operator to restart it), the display shows error 101.

Operating modes

Chimney Sweep Mode - The mode is used for proper analysis of combustion products and calibration by maximum and minimum values. Press the Reset button and hold for 5 s. If the boiler is in the “Winter” mode, the three-way valve is in the “CO” position and the burner is switched on even without a heating command. The device is in the "Summer" mode: in the absence of a command for DHW, the device operates in the CO mode; if there is a command for DHW, the device operates in DHW mode. In Chimney Sweep mode, temperature measurement (by NTC probe 1) is performed as follows: Summer mode over Off: 86 C; On: 81 C; Winter mode over Off: 89 C; On: 84 C. Press the RESET button to exit Sweep mode. If this is not done, after 10 minutes the device automatically exits this mode.

Comfort mode - In this mode, the Ariston Genus 24 FF, 35 FF, 24 CF, 30 FF boiler starts supplying hot water to the DHW circuit faster. For this purpose, in the primary circuit of the boiler, heat. Press the “C” (comfort) button. In Comfort mode, the display shows the COMFORT icon and the letter C, as well as the temperature measured by the NTC1 sensor. The device switches to Comfort mode for each command on the DHW and maintains it for 30 minutes. To exit this mode, press the “C” button again. Menu parameter 2 50 allows you to set the Comfort mode as follows: 0: disabled; 1: switched on for 30 minutes after the command for DHW; 2: always on.

Frost protection mode - The mode is active only when the ON/OFF switch is in the ON position. The transition to this mode is carried out according to the readings of the temperature sensor at the supply to the CO circuit (NTC1). Temperature measured by NTC1 probe: 3 to 8 C - The pump runs at speed III. The three-way valve switches alternately for 1 minute to the “CO” mode, for 1 minute to the “DHW” mode. The display shows the letter F and the temperature value measured by the NTC1 probe. Action time: until the temperature measured by the NTC1 sensor reaches 9 C. Temperature measured by the NTC 1 sensor: below 3 C - The burner starts at minimum power; The pump runs at speed III. The three-way valve is in the “CO” position. The display of the Ariston Genus boiler alternately displays the letter F, the number 2 and the temperature value measured by the NTC1 sensor. Action time: until the temperature measured by the NTC 1 sensor reaches 30 C.

If the NTC 1 supply temperature sensor in the CO circuit does not work (open or a short circuit occurs), the transition to the “Frost protection” mode is carried out according to the readings of the NTC 2 sensor on the return fitting, but in this case only the pump works (the burner does not turn on) . The display does not indicate the frost protection mode, but the NTC 1 sensor error code 110 in case of a short circuit or open circuit. The unit goes into frost protection mode even if the NTC 2 sensor is not active (open or short circuited), but in this case only the pump works (the burner does not turn on). The display does not show the designation of the frost protection mode, but the NTC 2 sensor error code 112 - a short circuit or open circuit. The machine goes into frost protection mode even if there has been a shutdown due to no flame detection, error code 501, or a blockage due to overheating, error code 101, but in this case only the pump is running (the burner does not turn on), and the display shows the display does not indicate the frost protection mode, but the lockout error code. In case of shutdown
power supply, all settings are saved in the device, and after power is restored, it switches to the mode in which it worked before the shutdown.

Ariston Genus boiler combustion products removal system

On the outside of the apparatus there is a flue gas collector with two samplers for determining the temperature of the flue gases and air at the inlet, the content of O2, CO2, etc.

Air pressure switch - To control the proper removal of combustion products, the device is provided with a pressure switch. 25 kW: Open = 50 Pa (0.50 mbar); closed = 60 Pa (0.60 mbar); 30 kW: Open = 74 Pa (0.74 mbar); closed = 89 Pa (0.89 mbar); 32 kW: Open = 74 Pa (0.74 mbar); closed = 89 Pa (0.89 mbar); The first pressure value is taken at the outlet of the fan (nipple “L” of the pressure switch). The second pressure value is taken in the combustion chamber (nipple “H” of the pressure switch). Both values ​​are negative (below atmospheric), but the pressure switch monitors the difference in the indicated values ​​(to measure this difference, you can connect a differential pressure gauge to the pressure taps located on the top of the device). During operation of the Ariston Genus boiler, the contacts of the pressure switch are closed. The device responds to opening contacts. 607: Pressure switch contacts closed before start of ignition sequence. 6P1: The pressure switch contacts are not closed, although the fan has turned on.

Variable Speed ​​Fan - The following fans are used: 24 kW: with 35 W motor; 28 kW: with 45 W motor; 32 kW: with 60 W motor; A Hall sensor is used to measure the fan speed. Upon receipt of a command for heating, the ECU starts the fan at maximum speed (up to 2800 min–1). After the pressure switch is activated, the fan switches to the ignition speed (different for DHW and CO modes), which allows optimizing the ignition of the burner. Once the presence of a flame has been detected by means of a control electrode, the fan speed can be controlled according to the required heat output.

The fan speed is regulated in accordance with the gas supply through the gas valve in the direction of increasing or decreasing, respectively, more or less current is supplied to its winding. To control the rotational speed, a Hall sensor is installed on the front side of the fan. If the fan speed falls more than 100 min-1 below the minimum speed (1750 min-1) within 10 s, or if the connection to the Hall sensor is detected, error 604 is output: fan off delay: 40 s at maximum speed ; 2 min - at the minimum. To control the fan speed in min-1, use parameter 8 22 or measure the frequency of the signal between pins 4 and 5 of connector CN07. Parameter 222 makes it possible to disable the switching of the pump from one speed to another: 0: adjustable; 1: fixed.

Ventilation shutdown delay - The fan operates with a shutdown delay: 40 s at a frequency of 1900 min–1 (after trips 501 and 103); 20 s at maximum speed (after no water circulation shutdowns: 103, 104, 105, 106 and 107), 10 s at 1900 min–1 (after no water circulation shutdowns: 1P1, 1P2 and 1P3); 5 s for 1900 min–1 (after each shutdown of the burner).

Fan off delay after heating command: parameter 243= 0: 5 s for 1900 min-1 (every time after burner off); parameter 243= 1: 3 min for 1900 min–1 (every time after the burner has been switched off).

Fan stop delay after DHW command: parameter 254= 0: Tsub. less than 75 C = turns off without delay; Tsub. more than 75 C = 3 min (minimum speed); parameter 254= 1: 3 min (fixed time, minimum speed).

Combustion products control (boilers Ariston Genus 24 CF, open combustion chamber) - An overheating sensor with automatic reset, installed in the flue gas duct, sends a signal to the computer, which ensures proper control, provided that the computer has power. When the overheating sensor is triggered, the device is switched off protectively, the error code 601 is displayed on the indicator. Reason for triggering: The temperature in the combustion products outlet path exceeded the sensor triggering setting, 75 ± 3 C. After 12 minutes, the sensor is automatically reset, since the temperature has time to drop during this time . To immediately reset the sensor, you can turn off and then turn on the power to the ECU. Error messages when the overheat sensor is triggered - 601: The overheat sensor has been triggered (safety shutdown). 601: open circuit of the overheat sensor (safety shutdown).

System of removal of products of combustion (tight chamber, models FF) - The device allows the installation of both coaxial (60/100 mm) and two-channel (80/80 mm) gas ducts (respectively, two connection options). Flue gas samplers are built into the throat of the flue gas collector.

Ariston boiler error codes

Heating circuit

Error 101 - Overheating of the primary heat exchanger. The overheating thermostat has tripped/failed or the temperature of the NTC sensor is above 102C. Check/adjust the maximum pressure of the gas valve. Clean/replace the heating circuit filter. Scale in the heat exchanger. Washing / replacement of the heat exchanger. Check circulation pump for damage.

102 - Short circuit or open circuit in the electrical circuit of the coolant pressure sensor.

103 - Insufficient circulation or no heating medium: Increasing T supply more than 7 C/sec (when 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 circulation pump for damage.

Error 104 - Insufficient circulation or no coolant: Increase in supply or return temperature by more than 20 C / sec. Check the coolant pressure in the heating circuit, or bleed the air from the Ariston boiler. Cleaning or replacing the heating circuit filter. Check circulation pump for damage.

Error 105 - Circulation or presence of water: Tsupply - Treturn more than 55C (three times).

106 - Circulation or presence of water: Tem. +10C (when repeated 3 times).

Error 107 - Circulation or presence of water: Temp. more than T under. +30C.

Error 108 - Low pressure in the heating circuit (recharge recommended). Check the pressure of the heat carrier in the heating circuit, or bleed the air from the boiler. Check the wiring going 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 circulation pump for damage.

Error 109 - Test for "validity" failed. The temperature of the return line during the start-up period of the Ariston boiler is 5 C higher than the temperature in the supply line of the heating system. Make sure that the NTC 1 and NTC 2 sensors have contact with the heating pipes. Check the heating medium pressure in the heating circuit. Check the wiring going to the pressure switch. Replace the pressure switch.

Error 110 - The sensor in the heating supply line (NTC 1) is open or short circuit. Check NTC1 temperature sensor contacts. Replace NTC temperature sensor 1.

111 - Reduced pressure, or lack of coolant (P more than P min.) for Ariston boilers with the "Semi-automatic make-up" function

112 - The sensor in the heating return line (NTC2) is open short circuit. Check NTC 2 temperature sensor contacts. Replace NTC 2 temperature sensor.

114 - Short circuit or open circuit in el. outdoor temperature sensor circuits.

116 - The safety thermostat of the low-temperature underfloor heating system has switched on.

Hot water circuit (DHW)

201 - Short circuit or open circuit in the electrical circuit of the DHW temperature sensor (NTCs).
202 - Short circuit or open in the electrical circuit of the lower temperature sensor of the boiler (Solar heating system).
203 - Short circuit or open circuit in the electrical circuit of the temperature sensor of the boiler (for boilers with a boiler).
204 - Short circuit or open in the electrical circuit of the temperature sensor of the solar collector.
205 - DHW inlet sensor (solar) - open circuit or short circuit.
207 - Overheating in the heating circuit of the solar collector (Solar heating system).
208 - Low temperature in the solar collector circuit (frost protection).
209 - Overheating of sanitary water in the boiler

Electronic board boilers Ariston

301 - Display board program error. There is no contact between the main board and the display board. Check if the EEPROM key is installed correctly on the main board. Check contacts. If necessary, replace the display board.
302 - Communication error between main board and display board. There is no contact between the main board and the display board. Check contacts. If necessary, replace the display board.
303 - Malfunction of the main board. Poor contact between main board and control board. Check if the main board is OK.
304 - More than 5 resets completed within 15 minutes. Switch off and start the boiler with the ON/OFF button.
305,306,307 - EPU internal error.
3P7 - Service programmed.

Errors - Ignition and Flame Control

501 - Error: No flame found at the time of ignition. There is no gas. There is no contact, or grounding is not used. The voltage between neutral and earth 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 soft ignition power. Check for a fault in the main board.

502 - Flame detected with gas valve closed. Check or replace the ionization electrode. Moisture has entered the ionization electrode. Dry and protect the boiler from water vapor moisture. Check or replace the gas valve. Check the characteristics of the power supply and the presence of a ground loop. Check for damage to the main board.

5P1 - Failed to light the burner on the first try. Check the ionization electrode and its electrical circuit. Check the gas pressure at the lowest and highest power. Check soft ignition setting and (if required) add it. Check the combustion air supply/exhaust system.

5P2 - The second ignition attempt was unsuccessful.

Error 5P3 - Failed to ignite the burner on the second attempt. Check the flue gas system. Check the gas pressure at the lowest and highest power.

Air supply / Smoke extraction

Error 601 - Thrust sensor triggered (only in models with an open chamber).
602 - The smoke removal control thermostat has tripped (only in boilers with an open combustion chamber type VMC).
604 - Fan operation at low speed (less than 1775 rpm - 100 rpm) or Hall sensor malfunction.
Error 607 - The air relay is on before the fan starts.
Error 6P1 - Pneumatic relay operation delay.

Temperature zones

701 - Short circuit, open in the electrical circuit of the flow temperature sensor (zone 2).
702 - Short circuit or open in the electrical circuit of the return line temperature sensor (zone 2).
703 - Short circuit or open flow temperature sensor (zone 3).
704 - Short circuit or open return line temperature sensor (zone 3).
705 - Short circuit or open circuit in the electrical circuit of the hydraulic arrow temperature sensor.
706 - Overheating in temperature zone 2.
707 - Overheating in temperature zone 3.