Ariston gas boiler errors: how to find and eliminate the fault by code

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

However, to quickly identify the reasons, it is not necessary to study as a gasman. If an Ariston gas boiler error occurs, the system will recognize the problem and display the fault code on the screen. In most cases, you can find a malfunction and adjust the heating yourself.

We will talk about how to timely detect the maturation or occurrence of a breakdown. In the article we present, you will find a decryption of codes and tips to correct the situation. Our recommendations are useful to those who decide to repair the equipment with their own hands.

Heating circuit problems (error 1 **)

For boilers with the Ariston logo, all error codes are grouped into nodes. For each case, you can determine the most likely causes of the problem and its solutions. It should be noted right away that not all malfunctions can be eliminated with one's own hands.

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

In the event of a malfunction, an error code is displayed on the LCD screens of modern gas boilers. This is much more convenient than counting the number of flashes of LED bulbs as on older models.

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

This problem occurs in the following cases:

• Excessive maximum pressure within the gas valve, resulting in strong heating. You need to adjust this parameter.
• Low flow rate. The problem may be caused by clogging of the filter, the formation of constrictions from scale or a breakdown of the built-in circulation pump. You need to check and fix these problems.
• Failure of the temperature sensor. In this case, replacement is required.

Error No. 102. The pressure sensor is out of range. This can be caused by a problem with the pressure in the circuit, as well as a breakdown of the sensor itself.

The latter situation usually occurs as a result of wiring problems - short circuit or open circuit. You need to ring the wire from the device to the central board.

You can call the sensor itself with an ordinary tester. Resistance should be minimal - 1-2 Ohm. If it is completely absent, then the sensor will definitely have to be changed

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

• № 103. 3 times within 4 minutes, the rate of increase in the supply temperature exceeds 7 ° C / s.
• № 104. One of the indicators increased by more than 20 ° C per second.
• № 105. The heat transfer medium to the circuit is hotter than the return flow at 55 ° C. The problem is fixed 3 times in 4 minutes.
• № 106. Return temperature exceeds feed temperature by 10 ° C. It is fixed 3 times within 4 minutes.
• № 107. The return temperature exceeds the temperature in the supply line by 30 ° C. It is fixed once.

Given that the temperature sensor has an elementary design and there is actually nothing to break there, it remains to identify and eliminate the problem with insufficient movement of the coolant.

It can be caused by the following:

• Airiness of the heat exchanger or heating circuit. You may have to check all the way for traffic jams.
• Filter clogged. This part must be cleaned or replaced.
• Pump malfunction. Replace or repair the device.

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

If a leak occurs, the pressure in the system will drop. The gas boiler will stop itself, which distinguishes it from a solid fuel analog or an ordinary stove

Error No. 109 occurs when the pressure problem is more than 3 bar. This can happen if the make-up valve is not fully closed. For further work, it is necessary to drain part of the water to reduce the pressure in the circuit.

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

Error No. 111 occurs when the pressure in the circuit is below permissible. The factory setting for this parameter for Ariston boilers is 0.4 Bar. Possible damage to the sensor or leakage of water from the circuit.

Error No. 112. There is a problem with the temperature sensor on returning from the circuit. It is necessary to check its contacts or replace the sensor.

Error No. 114. There is a problem with the street temperature sensor. It is necessary to check its contacts or replace the sensor.

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

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

A clogged water filter causes problems with the circulation of water. This leads to boiler shutdowns and also affects the pump badly.

Sometimes codes are lit on the indicator 1P1 - 1P4. These are not errors, but warnings that signal a sudden sharp jump in temperature. Such effects sometimes arise due to hydrodynamic processes characteristic of a flowing hot fluid in a narrow stream. You should not pay attention to them.

Hot water failures (error 2 **)

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

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

Error No. 201. The problem with the power to the temperature sensor is an open or short circuit. It is necessary to eliminate the breakdown of the wiring.

Mistakes No. 202-205 related to the operation of sensors. When a signal ceases to come from them or it behaves unpredictably (sharp jumps in data), these errors are triggered:

• № 202. Sensor problem boiler or heliosystems.
• № 203. There is a problem with the NTC temperature sensor.
• № 204-205. There is a problem with the temperature sensor recording the operating values ​​of the solar collector.

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

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

The temperature sensor is easier to replace than clean. They are inexpensive, but it’s easy to find them, because the boilers install parts with standard parameters

Error No. 207. Overheating of the solar collector thermostat. This can be caused by the fact that solar energy is not used to heat water. Then the collector must be disconnected. Also, this malfunction can occur if the thermostat breaks. In this case, it will need to be replaced.

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

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

Failures in electronics (error 3 **)

Such sophisticated modern equipment as gas boilers is equipped with electronics for automatic operation and response to various situations. Control boards can fail as a result of aging, power drops, excessive moisture, or mechanical damage.

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

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

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

Error No. 302 - A special case of a previous problem. Both boards pass the test, but the connection between them is unstable. Usually the problem is a fracture of the cores of the loop, which will have to be replaced. If it is OK, then there is a malfunction on one of their boards. They can be removed and taken to a service center.

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

Error No. 304. Over 5 reboots in the last 15 minutes. Talks about the frequency of problems that arise.It is necessary to turn off the boiler, wait a while and turn it on again. It should be monitored for some time to identify the type of alerts if they reappear.

Error No. 305. Crash in the program. It is necessary to let the boiler stand off for some time. If the problem persists, you will have to reflash the board. You need to do this in the service center.

Error No. 306. Problem with the EEPROM key. It is necessary to restart the boiler. If the error persists, you will have to change the board.

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

Error No. 308. Incorrectly set type of combustion chamber. It is necessary to check the installed type of combustion chamber in the menu. If the problem is not resolved, then the wrong EEPROM key may be installed or the motherboard is faulty.

You can try to fix any electronic boards in computer repair shops. Especially if the problem is caused by loss of contact or aging of capacitors

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

Communication with peripheral devices (errors 4 **)

Ariston Geysers display error codes for standard peripherals. This is to explain the reaction. boiler automation on an emergency situation. In this case, the consumer will be able to try to independently fix the breakdown or conflict of equipment.

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

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

Error No. 403. SIM card problem. Contact has gone out or the card itself is damaged.

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

GSM gas boiler control module allows you to remotely control building heating modes. However, in addition to the obvious pluses, there is a minus - this is another node that can break

Error No. 405-406. Data bus (interface) problem. Typically, the fault is loose contacts. Less often, the tire itself needs to be replaced.

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

Flame and ignition control (errors 5 **)

Problems can arise in both open and closed combustion chambers. Although it must be admitted that there are few types of malfunctions in comparison with other nodes of the gas boiler.

Error No. 501. No flame when ignited.

This situation can happen for many reasons:

• There is no gas. It is necessary to check the feed tap. It must be open.
• The system will not turn on if the voltage between the neutral and the ground conductor is more than 10 V. It is necessary to eliminate the leakage of current.
• The ionization electrode is out of order. Before changing it, you need to check the quality of the connection to the motherboard.
• The power of smooth ignition was lost. It is necessary to adjust this parameter according to the instructions for a specific model.
• Malfunction of the main control board.

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

If the house did not have grounding, then for a gas boiler it will have to be done. And by all the rules, otherwise the protective mechanisms will block the start of heating

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

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

The air supply system and the removal of flue gases generated during the operation of the gas boiler can be natural and forced. Therefore, for different devices, some errors cannot occur. But we will consider them all.

Error No. 601. The operation of the draft thermostat occurs when the contact breaks or internal breakdown of the smoke thermostat. Clogging of the exhaust system is also possible.

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

Error No. 604. The Hall sensor is defective (it needs to be replaced) or the fan speed is low (it needs to be cleaned or replaced too).

Error No. 607. The contacts of the control pneumatic relay were closed until the fan was turned on. This part confirms a sufficient amount of traction before ignition. To eliminate the early circuit, you need to carefully remove the air switch and blow its tubes, removing dirt or condensate. If this does not help, then the part will have to be replaced.

A pneumorelle is connected to the exhaust chamber by a silicone tube. Sometimes there is a condensate collector. If the problem is with the pressure switch, then first you need to check the integrity of the tube

Error No. 610. Thermal fuse contacts open. This part must be replaced.

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

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

Ariston brand boilers allow you to split the house into zones, each of which will have its own heating mode. If a problem occurs with one of the sections, the system accurately determines the malfunction, therefore, the repair of a specific circuit can be carried out without interfering with the rest of the normally working fragments of the heating network.

Error No. 70X. There is a problem with the flow temperature sensor in zone X. Check the sensor contacts or replace this part.

Error No. 71X. The same thing, only with a sensor on the return.

Error No. 72X. Overheating was recorded in zone X. First of all, you need to check the operation of the thermostat responsible for this section. It could just be a broken contact or a broken node. If it works correctly, then you need to change the settings.

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

Conclusions and useful video on the topic

Periodic maintenance of the gas boiler can prevent many problems. How to do this using the BS II Series as an example:

Change of a number of parts on the Ariston boiler - pump, make-up valve, three-way valve. How to clean filters and passages:

The presence of the error signal of a modern gas boiler provides the user with the opportunity to deal with the problem of the occurrence of the problem. Further, it is necessary to analyze the troubleshooting methods yourself.

Sometimes, to restore the gas boiler Ariston to work, it is enough to clean the contacts yourself, adjust the gas supply power or restart the device. However, all breakdowns associated with violations in the operation of the electronics and the gas supply system to the combustion chamber should be entrusted to representatives of the gas organization.

The boiler also responds to peripheral equipment breakdowns or problems with the heating circuit. In this case, it does not make sense to call a boiler repairman.

Do you want to share your own experience in troubleshooting and repairing a gas boiler from Ariston? Do you have useful information on the topic? Please leave comments in the block below, ask questions, post photos.