Errors and malfunctions of the Corestar gas boiler

Did the Corestar boiler show errors on the display? This means that the self-diagnosis system “detected” a malfunction. All modern heating equipment is equipped with automation - sensors that monitor the operation of each unit. Sometimes the user does not even need to contact the service center. It is enough to determine the meaning of the code and find the problem.

Power setting

After starting the device, you need to press and hold for 5 seconds. buttons to adjust the temperature to enter the setting mode. Adjust the gas pressure by decreasing and increasing the pressure using the DHW adjustment buttons. While the setup is in progress, a number will appear on the screen. This board designation is the minimum power value in percent: 44–54. When the pressure gauge shows the required pressure value, press the RESET button, the parameters will be saved.

When setting the operating power, set the gas pressure using the buttons that regulate the heating agent temperature. The power percentage will appear on the screen: 0–99. Having set the required value, press RESET, save the parameters, exit the settings mode.

The meaning of error codes that appear during operation of Korea Star boilers

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Error A01 - Shows that there is no ignition. The flame ionization sensor, which controls ignition, reports a malfunction. This component detects the presence of a flame and stops the operation of the Koreastar gas boiler if the main gas burner device is incompletely burned or if there are problems with gas supply. Blocking occurs after 3 unsuccessful starts. To return to work, you must press and hold the Reset key. Gas valve malfunction - The gas valve is controlled by an electronic board. Diagnosis of this part is carried out by determining the resistance and voltage values. If the values differ from the standard characteristics, you need to replace the valve with a new one. There is no gas flow into the device - A valve is installed in the gas distribution system that can shut off the flow of gas fuel. Therefore, an accident at the moment the device starts can occur due to a closed tap. Poor contact or no pulse detected from the flame ionization sensor. The electronic board is damaged - If the ignition process is carried out without error, but the boiler suddenly goes out anyway, then we can assume that the electronics cannot see the flame. Based on this, it should be checked. Error code A02 - Problems with ignition. This situation occurs if there is no ignition or flame separation is observed. It is necessary to check the contacts between the ignition mechanism and the flame sensor, and also between the electronic board and the gas valve. The main reason for the extinguishing of the burner flame is unsatisfactory draft. Error code A03 (F41) - Overheating of the heat exchanger of the Corestar boiler. The unit stops. The thermostat protecting against overheating has turned on - The overheating thermostat, like the temperature sensor, is most often located on the outlet pipe of the main heat exchanger. The main purpose of a thermostat is to protect the device from elevated temperatures. The malfunction may appear due to problems with the thermostat, temperature sensor, and also due to problems with the main circulation circuit. The temperature sensor is out of order - An incorrect signal is received on the control board or the contact between the sensor and the control board is broken. Code A08 - Damage to the overheating thermostat - If it is suitable for operation, although actual overheating of the liquid is detected, then most likely there is a problem with the coolant circulation in the main circuit. Clogged primary heat exchanger or main circuit filter element (poor circulation means increased heating of the liquid). There is a problem with the circulation pump or there is an air lock in the heating system. Error F05 - Lack of traction. In order to ensure stable and reliable operation of the boiler, draft must be provided to remove combustion products so that they do not enter living spaces. This is monitored automatically, and if any problems occur, the draft sensor will trigger and the boiler will be blocked. The main factors due to which there is no draft: narrowed size of the smoke exhaust duct, improper installation, clogging, ice on the walls. Narrowing the size of the chimney channel leads to weak draft. The length of the chimney pipe is exceeded. It is recommended that you carefully study the installation instructions for the device and check that all necessary requirements are met. A sufficiently long horizontal section of the smoke exhaust pipe can lead to a lack of necessary draft. Failure of the pneumatic relay-traction sensor - When a vacuum occurs in the supply tube, a soft click will be heard. Loss of contact between the electronic board and the traction sensor, the presence of condensation, as well as incorrect connection of the tubes to the pressure switch. The fan has stopped working - There is a blockage in the fan impeller. There is not enough lubricant on the fan shaft, so it does not reach the required speed. Lost contact between the electronic board and the fan. Error F10 - The heating circuit temperature sensor is not functioning correctly. This indicates that the temperature sensor of the heating system has broken down or the temperature required for operation has been exceeded. Open circuit in the temperature sensor circuit in the heating circuit - This malfunction occurs if the connection between the temperature sensor and the electronics board is broken, or the temperature value is much lower than the required one. Within 5 seconds after detecting a malfunction, the Korea Star Premium boiler will resume normal operation if the malfunction occurred spontaneously. You should check that there is no moisture on the temperature sensor connector and the controller connector. If there is no moisture, the sensor must be replaced. The appearance of a short circuit in the temperature sensor in the heating circuit - This situation occurs when there is a short circuit in the temperature sensor circuit or the temperature value of the water is higher than normal. Initially, you should measure the resistance of the sensor. If the resistance characteristics differ from the standard, it is recommended to replace the temperature sensor. When installing a new sensor does not bring the desired result, repair the board. Error F11 - Failure to operate the DHW temperature sensor. This code indicates that there is a malfunction of the DHW circuit temperature sensor or the recommended temperature has increased significantly. The main factors due to which this problem may occur: the temperature sensor for the hot water supply is defective. Loss of contact between the control board and the temperature sensor on the hot water supply. The control board has failed. When the DHW temperature sensor is operational and securely connected to the electronic control board, but the device detects an error, then, apparently, the electronic control board needs to be replaced. Error F37 - Means that the pressure inside the system is low. Possible reasons why this malfunction appears: a decrease in fluid pressure in the heating system. The contact between the electronic board and the pressure switch is broken. Minimum pressure switch faulty. Initially, you definitely need to know the pressure gauge values. As a rule, the problem is eliminated by using a feed tap, which is installed to fill the system with coolant. If the emergency situation occurs again, then there may be a fluid leak. The hydraulic pump, main heat exchanger, excess pressure relief valve, worn sealing elements, make-up valve and other parts may be leaking. Leaks can be found by visually inspecting hydraulic components and connections. The Koreastar Bravo wall-mounted boiler was put into operation two years ago. Lately, it almost constantly shows ignition error A 01. After resetting with the reset button, the device sometimes starts up satisfactorily, but this happens sporadically. Just yesterday I removed the air plug and it works much better. What could be wrong? If it gives an error related to the chimney, we recommend that you open the safety covers. This will help capture air from the room. Next, inspect the chimney for the presence of ice and, if there is any, clean it. In the event of a flame failure, you should find out whether there is a gas supply to the room. All the time the gas boiler gives error F10. Please tell me what it means? This code refers to a breakdown of the heating circuit temperature sensor. Most likely it needs to be replaced. What is the problem when the Korea Star Premium gas boiler does not turn on? Error A 03 also appears regularly. What needs to be done? Such a failure is usually caused by any problems with the thermostat, temperature sensor, and also if there is a malfunction in the main circulation circuit. Most likely, the heat exchanger overheated. If the temperature sensor and thermostat do not break down, then the problem is with the control board. You must change it. Why does the device not want to start and error code F37 is displayed? The pressure is maintained normally, no leaks are observed. I turn off the power, but the problem does not go away. What's the matter? This situation usually occurs when the fluid pressure in the heating circuit is low. In this case, it is recommended to check the pressure sensor. We assume that this is the reason. The problem with the unit is as follows: the hot water supply is adjusted to a temperature of forty-five degrees. If you open a hot water tap, the burner lights up for a few seconds and then goes out. This process occurs regularly. Either warm water or cold water flows from the tap. Error A 08 is displayed repeatedly. What could be the reason? This code indicates overheating of the DHW system fluid. We assume that the heat exchanger is very dirty, or the thermostat is incorrectly set. We have such a problem with the Koreastar Premium boiler. At the moment of ignition, the device shows an error with code A 02 (the flame breaks). When you restart it, it turns on, but as soon as the burner starts working, you can hear some clicks, and the error is displayed again. I changed the ionization electrode, washed the flow sensor, turned the plug over, but the result was zero. What could it be? This problem can occur in several cases. The flame control electrode has failed. Gas supply is incorrect. The electronics board is faulty. The device has turned off autonomously and displays code F 37. What happened? Low water level in the device or defective pressure switch. First, fill the system with coolant. The gas appliance stops working with error F 05 displayed. I cleaned and purged it - the result is zero. What should I do? This code indicates unsatisfactory draft, and you need to check the smoke exhaust channel. It is possible that the membrane is stuck. In other cases, we advise you to contact a service organization to thoroughly check the device and then check it. The wall-mounted gas boiler Corestar Bravo works at home. An error with code F11 began to appear. The device itself does the work; we set the water temperature level with a manual switch. When it was being installed, it apparently overheated because the automatic temperature mode was turned on. We do not have an external air temperature sensor. For what reason did this happen? Presumably, the hot water temperature sensor has broken down. Sometimes the electronics board malfunctions. The device operates for approximately four to five minutes, after which the gas burner stops working and error F 05 is displayed. It burns for about a minute, the gas burner lights up again, and the unit functions normally for another three to four minutes, and so on continuously. This failure, based on the operating manual, indicates that the draft sensor is triggered, but the chimney channel is not clogged, combustion products are discharged normally. I just can’t figure out what is causing the problem? In a particular case, the probable sources of the lack of traction are: problems with the pressure switch-traction sensor. The contact between the control board and the pneumatic traction sensor is broken. There is condensation, as well as a poor connection of the tubes with the pressure switch. There is a problem with the fan operation. It probably does not develop the required speed.

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Gas boilers
Electric boilers
Boiler error codes
Troubleshooting boilers
Gas water heaters
Malfunctions and repairs of geysers
Water heaters
Troubleshooting water heaters
Repair of indirect heating boilers
Troubleshooting electric convectors

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BAXI ECO FOUR

Heating system control. Installation. Connection. Transfer to another type of gas. Adjustment devices and protection devices.

BAXI LUNA

Peculiarities. Installation and assembly. Automation components.

BAXI MAIN FOUR

Technical specifications. Installation. Adjustment and checking. Maintenance.

BAXI SLIM

Adjustment and protection. Installation and assembly. Pressure setting. Maintenance.

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BAKSI - REPAIR

After starting, a malfunction appeared. It doesn’t want to turn on, it worked for two years, now the whole display lights up, just like when the boiler is turned on, when the self-diagnosis mode is in progress, then it clicks, turns off for miles and seconds and turns on the whole display again. It turned on once, but it gives error E10 water pressure, although the pressure in the system is 1.5 atm. Tell me, what could it be?

BAXI - OPERATION

In operation, the Baxi main four 240 boiler shuts down with error E35 (stray flame). Tell me what to do? First season in 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 device?

BOSCH - REPAIR

Bosch 6000 24 kW boiler, single-circuit with built-in three-way valve. The boiler sensor does not see it and gives an error. Tell me how to do it so that it doesn’t give an error and works normally for both the heating and the boiler?

BOSCH - ADJUSTMENTS

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

ARDERIA - REPAIR

We installed an Arderia esr 2.13 ffcd boiler. If my coolant pressure drops slightly by a couple of notches over 2-3 days, could the reason be a faulty three-way valve (there are no leaks from the radiators)?

ARDERIA - ADJUSTMENTS

The gas boiler Arderia 2.35 is in operation. Tell me about reducing power. I heard something about modulation, fan speed, etc. Is it really possible to reduce power?

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BUDERUS FLOOR

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

BUDERUS WALL

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

VAILLANT - REPAIR

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

VAILLANT - ADJUSTMENTS

There is a malfunction in the boiler, 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 fine.

DAEWOO

In operation there is a double-circuit gas boiler Daewoo Gasboiler with an electronic panel. When the DHW is turned on, the heating heats up, the operating mode is summer. I removed the three-way valve, there is no dirt or wear. It seems that the board does not control the three-way valve. How to check?

ELECTROLUX

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

KOREA STAR

Koreastar boiler malfunction. The heating works perfectly, the hot water comes intermittently, when you turn on the hot water tap, cold water comes out first, then boiling water. After a few seconds it’s cool, then boiling water again. What could be the problem?

FERROLI

Malfunction of the Ferroli Domiproject 24 boiler - I set it to 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, a Junkers euroline gas boiler, when hot water is turned on, gas ignites, then goes out, and so on several times. If you turn it on while the heating is running, the water heating starts 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. It is not possible to adjust the fan run-on. I set it to 30 seconds, but still 2 minutes. spins.

OASIS

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

SAUNIER DUVAL

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

VIESSMANN

Where should a condensate trap be installed in a coaxial chimney? The boiler wh1d with a closed combustion chamber is located at a distance of 1 m from the wall.

WESTEN

Problem starting the Westen Pulsar D boiler. Piezo ignition works, but there is no flame, error E01 after a crackling sound. I moved the fork around.

BERETTA

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

ARISTON

An Ariston gas wall-mounted boiler has been installed and connected, which does not hold pressure at all: while cooling the heated water, the pressure drops to zero, although water is regularly filled. What about the pressure?

SIME

Metropolis dgt 25 bf boiler malfunction. The hot water supply has stopped working, the heating is working, it does not display an error. What do you advise?

SOLLY

Please tell me how to solve the problem. The Solly Standard boiler, whenever you try to turn it on or hot water, displays a GS error.

WOLF

Wolf boiler in operation. Lately it has begun to behave strangely: during the pause between starts, it turns on the burner for one second five times, and 70 degrees appears on the display. Where to look for a problem?

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

DEMRAD

In the gas boiler Demrad, the gas supply to the burner stopped. The piezo element clicks, but there is no ignition. There is nothing wrong with the gas stove, there is gas. What is the reason?

KITURAMI

The Kiturami world boiler is malfunctioning and stops periodically. I clean the flame sensor and the unit works fine for a while, but soon the same thing happens again. He also began to smoke heavily. Maybe the problem is that the chimney is short, and it needs to be lengthened?

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IMMERGAZ - ERRORS

Errors of Nike Star, Eolo Star/Mini, Mythos boilers. Malfunctions of boilers with the possibility of automatic unlocking.

IMMERGAZ - REPAIR

My boiler systematically raises the temperature to 80 degrees in winter mode. I called the repairman three times. He said that many models have this problem and suggested installing a programmer, but it’s not certain that it will help. Tell me how to solve this problem and will this programmer help?

AOGV

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. We put a filter on the water, but time passed, and again there was no hot water. What kind of breakdown could this be?

Installation and installation. Start-up and adjustment. Malfunctions and ways to eliminate them.

AKGV

Technical specifications. Installation and connections. Startup and operating procedure. Automatic adjustments.

NEVA LUX

The boiler Neva Lux 7023 is malfunctioning. It gives error E7 twice a month. But after reboot it still works. Now it gives error E6. It will work for 15 minutes and turn off. What could it be?

ROSS

Design and automation unit. Ignition order. Malfunctions and repairs.

ATEM ZHYTOMYR

Tell me, is it possible that due to low gas pressure the Atem Zhytomyr boiler goes out, a click occurs and goes out. What is the problem? Is it possible to temporarily disable automation and how?

LEMAX

We installed a Lemax KSG-12.5 Premium gas boiler. After turning off the main burner, a clicking sound occurs after a couple of minutes, what is the reason? Tell me?

KEBER

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

LIGHTHOUSE

I installed the Mayak gas boiler and connected it. It works fine. But the reason is this. When it works on unit it squeaks a lot, if you turn the knob 2-7 the squeak disappears. Tell me, what could it be?

DANKO

We installed and connected a Danko gas boiler with automatic Kare, it works great on the igniter, but as soon as you add power to the burner, it goes out completely, yesterday it went out within 5 minutes, today it works for about 20 minutes and goes out completely. Has anyone encountered this problem?

GAZLUX

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

NOVA FLORIDA

Water often boils in the boiler, causing it to fail due to overheating. The heat exchanger was recently washed, the system is not clogged. What's the matter?

RINNAI

Rinnai 167 RMF boiler malfunction. Recently I started showing error 14. How can I fix the problem?

CELTIC

The Celtic DS boiler heats up to 45 degrees and sits all day, does not turn off and does not heat the batteries, sometimes it shows error A3. How can I fix this problem?

MORA

The hot water pressure in the Mora Top boiler has dropped. What is the reason?

MASTER GAS SEOUL

The Seoul gas wall-mounted boiler stopped turning on due to a no-ignition error. How can it be eliminated? What exactly went wrong?

Advantages and disadvantages

The equipment prevents smoke in the room

When choosing a Corestar boiler, buyers are attracted by the reasonable cost of these devices and the price-quality ratio: few can afford a German-made unit. Coordinated work in the cold winter conditions inherent in a large part of Russia is also of interest to owners of private houses.

Other advantages of these devices are:

low noise level from a running pump;
high-quality automatic control unit;
climate control option;
optimization of gas supply (initiation - when the burner lights, stops - when it goes out), which saves fuel;
use of a device that prevents smoke in the room;
a mechanism that prevents freezing of the coolant.

The downside is that sometimes voltage surges still cause malfunctions of the microprocessor board, despite the manufacturer’s instructions about stable operation with differences within 15% on both sides of the nominal value. Such incidents can be prevented by installing an uninterruptible power supply.

Features of operation

KoreaStar boilers, being productive and reliable, have advantages and disadvantages characteristic of any equipment with a closed firebox:

Noisy. The reason is the operation of the fans. With their help, air is pumped and removed from the coaxial chimney. A distinctive feature of all forced-air burners is noisy operation. It is advisable to install such heaters away from living rooms.
The water in the hot water supply is heated separately from the coolant. A three-way solenoid valve increases the heating speed and ensures a uniform supply of water at any pressure in the water pipes.
When the coolant cools down to +5 °C, the boiler automatically starts, preventing defrosting of the heating system.
Energy dependence. The instructions for use of KoreaStar heaters say that they are capable of operating under voltage surges of up to 15% of the nominal value. But in practice there are problems, the controller board fails. Installing an uninterruptible power supply will help prevent breakdowns.
Before connecting the device, you need to obtain permission and order design documentation from the gas service.

Installation

Before installing the device, you should make sure that it runs on natural gas. If you plan to use liquefied gas, you need to readjust the heater - this should be done by a specialist. A power supply with parameters of 220 V/50 Hz must be supplied to the installation site of volatile models. Deviation of parameters from the norm leads to decreased performance and reduced service life.

It is prohibited to connect other electrical appliances to the boiler power source. It is also prohibited to use extension cords and adapters when connecting. Violation of safety standards may result in a fire.

The boiler does not turn on - there is no indication

Almost all modern gas boilers are equipped with a control board and an information panel with a liquid crystal display or LED indicators. If there is no indication, first of all you need to make sure that power is supplied to the boiler . Typically, the electrical connection of the boiler is carried out through a separate “automatic machine” - check whether it is turned on or not.

The surest way to make sure that power is supplied to the boiler is to check with a multimeter in voltmeter mode the presence of 220V at the connection point to the boiler board. If there is no voltage, it is necessary to localize and eliminate the problem. In real life, it happens that someone in the household simply pulls the plug from the socket.

Water (moisture) getting on the board

Water ingress is one of the most unpleasant situations. Although the board is in a protective case, water may get inside due to leakage or condensation. Often it gets into the box through the wires. Water ingress almost always causes damage to the board, in most cases irreparable. Characteristic stains and oxidation will be visible on the board due to water.

Features of Koreastar boilers

Boilers are designed for space heating and hot water supply

The company produces double-circuit units designed to implement two tasks - heating a home and supplying hot water. Floor-standing devices and those designed for wall mounting are available. For most devices, liquid for heating the home and for domestic needs is prepared separately. To level out the associated heating slowdown, the products are equipped with a three-way solenoid valve.

When the coolant cools to +5 degrees, the gas boiler is turned on automatically. This prevents water from freezing in the pipes. A decrease in gas pressure (up to a certain limit: minimum - 4 mBar) and changes in mains voltage do not affect the stability of the boiler.

Solutions to the issue (1)

The boiler has a self-diagnosis system and fault signals appear on the display. Errors marked with the symbol A cause the boiler to block. In this case, the user must manually reset the boiler by pressing the RESET button. Errors marked with the symbol F cause a temporary shutdown of the boiler with automatic activation after the value that caused the error returns to normal values.

Accordingly, errors A01.

Corestar boiler error codes - troubleshooting instructions

Installation

source

The boiler does not turn on - there is no indication

A little about the manufacturer

The brand, called Korea Star, dates back to 2010 and is headquartered in Korea, Hanam. This brand is a separate project of Gahbin Corporation, which has eight other world-famous brands at its disposal. In addition to Korea Star, these enterprises produce high-quality original parts for automobile manufacturers Daewoo, KIA, Hyundai, Ssang Yong and others.

The corporation also offers parts and devices to the world market:

Rice. 1 Company emblem Korean boilers Korea Star is the main of the 9 brands due to its quality products and the popularity of its products. As for diesel heating units, Korea Star provides each unit with a special quality certificate ISO 9001 QS 9000-9001.

The room in which gas equipment is to be installed should be equipped with fresh ventilation. Moreover, door and window openings cannot be classified as such if they do not contain devices that ensure constant movement of air flow - fans, holes in the door leaf, etc. When the heater is put into operation, it is prohibited to carry out construction work in the room that could change the ventilation design, thereby affecting the volume of incoming oxygen.

In the boiler room it is prohibited:

Why doesn't the boiler start?

Often problems are shown as an error code on the display. All modern models Vaillant (“Valiant”), Baxi (“BAXI”), Ferroli (“Ferroli”) are equipped with a self-diagnosis system. Each brand has its own codes and their meanings. If the display does not show symbols, then you need to look for the cause of the problem yourself.

Problems with wall and floor units can be caused by external and internal factors.

Insufficient gas pressure in the main;
Chimney problems;
Power surges in the network;
Draft, low temperature in the room/boiler room.

Internal factors include breakdowns of electronics - sensors, wiring, as well as individual components - pump, heat exchanger.

Line pressure drop

Does the dual-circuit device “AOGV”, “Beretta” or “Vaillant” turn off and not turn on? This is possible when the fuel supply is unstable. For the same reason, the burner does not light the first time. First of all, check:

Pipes and joints for gas leaks. To do this, lubricate them with soap foam. If bubbles appear, there is a leak. Then turn off the valves, open the window and call the gas workers.
Counter. If there is a breakdown, the meter readings do not change; noise and crackling are heard. You can’t fix the problem yourself—you need a specialist.

If everything is fine, wait until the gas supply is restored.

Does your equipment not start after a long shutdown? It may be worth using antifreeze as a coolant. It does not freeze when the temperature drops and allows you to safely start the system after a long period of inactivity.

Gas boilers Koreastar Buran

There is only one unit in this series. The Korea Star Buran gas boiler is installed on the floor, it is single-circuit, does not depend on electricity and can work with open and closed heating circuits. Such units are called AOGV and are the simplest heaters. At the same time, they are very reliable and have earned a good reputation.

Floor models have a 5 year warranty.

Characteristics of Korea Star Buran:

open combustion chamber;
mechanical automation made in Italy (SIT);
15 power options from 7.5 to 100 kW.

The Buran model differs from the Koreastar Senator series in the heat exchanger material, which is made of steel. While in the Senator boiler the heat exchanger is made of high-quality cast iron. Buran can only run on natural gas. The gas pressure must be no less than 6 mbar, and the coolant pressure must be no more than 0.4 mbar.

Maximum temperature 90 degrees. When igniting, due to the fact that the coolant temperature is below 30 degrees, condensation may occur. This leads to corrosion, so the temperature of the water in the circuit should not be allowed to drop so low. Before the heating season, the device must be checked for serviceability, and if necessary, clean the heat exchanger and chimney.

Content:
Features and technical data of boilers
Specifics of application and operation
Tips and tricks for choosing

Despite its name, the Koreastar gas boiler has nothing to do with Korea. It is developed and assembled at the Wilo plant. Moreover, this is practically the only model among all European equipment that was manufactured specifically for Russia, taking into account the peculiarities of operation in domestic conditions. The consumer is offered two basic wall-mounted Koreastar models - classic and bithermic type.

Why the gas boiler does not turn on: the main reasons

According to the main characteristics and parameters, the heating unit is:

with an open combustion chamber;
closed type (parapet);
turbocharged.

There are many reasons why a gas boiler fails. The most common is the lack of a sufficient level of pressure. This happens when there is a breakdown in the distribution network or meter. A malfunction signal is sounds unusual for the meter and low pressure.

Modern models have special displays that display the error code, which is determined by the self-diagnosis system. We are talking about the Basque, Valliant and Ferroli units. Each brand has its own codes with their interpretation. The panel indicates a code that can be used to determine the area of failure and its criticality. The meanings of the combinations are described in the attached instructions for use.

The likelihood that the boiler is not working due to an electronic malfunction is extremely low. This can only happen with some devices. When there is no error message on the display, you need to diagnose the boiler yourself.

The main types of faults include:

inability to turn the unit on or off;
the burner goes out;
temperature is below the required level.

Popular models Korea Star

The company produces many models of boilers, which differ in power, type of coolant, automation production and many other indicators.

All Corestar gas boilers have affordable prices and high quality, but when choosing, you should pay attention to the model’s compliance with the features of your home

For two-room apartments it is worth purchasing more inexpensive and compact boilers of 12–16 kW. If you need to provide a large area with heat, then you should think about 22–24 kW. Also, when purchasing this or that model, it is worth considering its features: the presence of a water heating system for domestic needs, reliable automation, small size.

Premium 16E

Premium class gas boilers are made using advanced technologies, which allows us to speak with confidence about the reliability of this equipment. The Premium 16E model can be purchased in the price range from 15 to 17 thousand rubles. At the same time, its characteristics are not inferior to such foreign brands as Bosh, Ariston and others.

Manufacturers of the Korea Star company confidently declare that if all recommendations are followed, the equipment will serve without failures or breakdowns for about 20 years.

Features of Premium 16E:

the presence of two heat exchangers: copper and steel - allows you to achieve maximum heat transfer from the coolant to the system; the German-made circulation pump is designed to operate at three speeds, which allows you to regulate the pressure in the system and ensure the speed of warming up the house; the presence of electronic modulation of the panel and an LCD display displaying the main indicators and equipment settings; the ability to provide hot water for a shower with a flow rate of 13 liters per minute; the boiler is protected from water hammer when there is a pressure drop in the system using a bypass valve; the boiler is capable of operating on natural and liquefied gas; the wall-mounted boiler has frost protection, which is important at low temperatures; the equipment can withstand sudden voltage changes, which ensures continuous operation of the device; The boiler weight is 32 kg, the power of 16 kW allows you to heat rooms with a square area of no more than 160 meters; The closed combustion chamber is automatically regulated, which ensures safety when the flame extinguishes.

Korea Star Ace

Advantages of this model:

proper operation even during voltage surges;
excellent heating to a given temperature at low gas pressure;
the ability to heat water for domestic use;
the presence of two heat exchangers that provide maximum heating of the system in a short time;
a special fan creates good draft, which ensures effective smoke removal;
a system that prevents dust from entering the boiler ensures its long-term operation;
a low-noise pump not only allows you to pump water efficiently, but also creates convenience, since the equipment can be installed in the kitchen;

The normal price is in the range from 17 to 19 thousand rubles.

Premium 24E

increased heat transfer due to the use of a copper heat exchanger;
providing a large amount of hot water (about 15 liters per minute);
reasonable foreign automation that ensures the maintenance of specified parameters and prevents breakdowns and emergency situations;
price range of 20 - 22 thousand rubles.

Design Features

10–20 kW devices are equipped with a 24 kW copper heat exchanger, so when the DHW circuit is turned on, they are not afraid of extreme loads. Their water productivity is 13.6 l/min.
Thanks to double protection of the heat exchanger, it does not overheat and its service life is extended.
The combustion chamber is available in two versions - closed (PREMIUM E) and open (PREMIUM A).
Economical fuel consumption.
Equipped with LCD screen. Self-diagnosis.
Modulated fire intensity.
Equipped with a WILO pump (German production), an anti-blocking system.
Frost protection system.
Connecting a remote control, room thermostat.

Advantages of Korean equipment

Does not respond to pressure changes in the gas line.
High efficiency value, efficient fuel combustion.
Wide range of models, there are wall and floor models, with one and two circuits.
Stylish design. Compactness.
Equipped with built-in fuses that guarantee the safety of the equipment in case of emergency situations.
Convertible to liquefied gas, the kit includes jets.
They can provide the house with hot water.
Possibility to select the operating mode. Setting the temperature.

Installation and operation

It is better to entrust the installation of the boiler to a professional

The boiler connection diagram is given in the instructions. It is determined by the device features of this model. Some units are energy-dependent, others do not require power. In the first case, a voltage of 220 V with a frequency of 50 Hz must be supplied to the connection point. You cannot use tees, extension cords, or connect other devices to the source. If a particular model needs to be supplied with liquefied gas, re-adjustment is carried out by inviting a specialist.

The boiler room must be provided with fresh air ventilation using equipment that creates continuous movement of air flows. The use of gas fuel prohibits the storage of chemically active and flammable compounds and materials in the room where the boiler is installed. Do not place the unit near a window, a flight of stairs or in a wall opening, or place heaters or air conditioning units near it. If there is a malfunction, an error code is displayed on the display (the explanation of the numbers is given in the instructions).

How to deal with problems

If the boiler goes out and does not light up again, check the quality of ventilation in the room. This is a common cause of problems for atmospheric models “Protherm”, “NAVIEN”, “Ariston”, “Bosch” with an open combustion chamber, because they take combustion air from the room.

Organize high-quality ventilation in the room;
Install ventilation valves on sealed window packages;
Open the window in the boiler room for air flow.

Check the presence of draft in the boiler chamber. To do this, light a match and bring it to the control window or chimney outlet. If there is draft, the flame will deviate to the side. If not present, it will burn evenly. In the latter case, a chimney inspection is required.

Basic error codes

a01

Error a01 – there is no signal about the presence of a flame. Gas does not flow or the gas valve or ionization electrode ignition is faulty. The control board may not be working correctly.

It is necessary to check all shut-off valves and, if necessary, bleed air from the water supply. Check the gas pressure on the valve - it should be 20 mbar (2 kPa), as well as the gas valve itself (replace if necessary).

Check the electrode for contamination, as well as the gap between it and the burner. It should be 3 mm ± 0.5 mm.

a02

Error a02 - the signal about the presence of a flame is false. The control board or ignition electrode is faulty. Check for mechanical damage on the electrode itself; it is possible that it is touching the burner. Also set the required gap between the burner and ignition/ionization - 3.5 ± 0.5 mm. Replace the control board if it fails.

Corestar boiler ignition electrode

a03

Error a03 - the boiler is overheating. The bimetallic overheat sensor (or it is also called an emergency thermostat) blocks the operation - the threshold temperature is about 90 degrees. Air has entered the heating system and/or there is insufficient water circulation in the heating system.

It is necessary to cool the boiler and restart it. Replace the sensor if necessary. Remove air from the circuit. Check the pump - open all shut-off valves, check the pump blades for contamination and the supply of voltage to its contacts. Replace the pump if necessary. If a03 appears again, the control board should be replaced.

a08

Error a08 - the exhaust air overheating sensor is faulty. The temperature limiter gives an erroneous value. Check it for open or short circuit and replace if necessary.

f05

Error f05 - a failure has occurred in the smoke removal system. The fan or air relay is not working correctly or is faulty. The chimney is clogged.

Boiler fan Corestar

Check the correct connection of the connectors to the air relay contacts and make sure that the air diaphragm does not stick. Replace the relay if necessary.

f11

Error f11 – the NTC extract air temperature sensor is faulty. Open circuit or short circuit of the device. Check the resistance of the semiconductor - it should be 10 kOhm. There may be no signal between the control board and the temperature sensor. Disconnect the sensor and then reconnect it. Replace if it is faulty.

f37

Error f37 – NTC DHW temperature sensor. Open circuit or short circuit of the corresponding device. With such an error, the burner will not be able to light up only in DHW mode. The boiler itself will be able to continue its work. Check the resistance of the sensor and the quality of the connectors. Replace parts if necessary.

The same code indicates low pressure in the heating system. The exhaust pressure sensor is faulty or the circuit pressure has dropped below 0.8 bar. Check the sensor, replace if necessary, and also find leaks. Fix the problem and replenish with water.

f41

Error f41 - heat exchanger is overheated. Poor circulation of the heat exchanger or air has entered. Remove air and check the pump according to the procedure described in the instructions, with the shut-off valves open. If necessary, replace the circulation pump.

Heat exchanger for Corestar boiler

f50

Error f50 - the control board has failed. Control board faulty. Check that there is no “breakdown” on the case, grounding, and if it fails, replace the board.

The boiler does not turn on or ignite

Several unsuccessful ignition attempts

This is the very first error code for most equipment manufacturers. For BAXI E01 boilers, for Arison 501 boilers, for Vaillant F28. Ignition of the gas-air mixture in the combustion chamber will occur under two conditions: the presence of gas at the burner nozzles and the presence of a spark. Gas enters the burner through the gas valve, the spark is generated by a transformer on the control board (or remote). A separate case should be noted when ignition occurs, but the boiler cannot detect the presence of a flame and goes out (closes the gas supply valve).

Phasing error. Often, gas boiler boards require connection polarity. For the average user, this means that the position of the plug in the outlet matters. If the connection polarity is reversed, the boiler does not see the presence of a flame, continues ignition (electrode crackling) even when there is already a flame on the burner, then turns off due to an emergency. Even if you did not touch the plug, the polarity could change at the substation!

Flame ignition or ionization electrode. It can be separate or combined. The main problems may be related to contamination (oxidation) of the electrode or its gap relative to the burner. A dirty ionization electrode prevents the board from detecting the presence of a flame and operation stops.

High voltage wire. High voltage is generated by a transformer and transmitted through a wire to the electrode, where it pierces the air gap between the burner and the electrode with a spark. If a characteristic crackling sound is heard, but a spark on the burner is not visually visible, it is possible that the breakdown is occurring somewhere else. For example, there is a microcrack in the insulation of a high-voltage wire, and a breakdown occurs at the point where the insulation on the housing is broken.

Problems with electrical connection. The presence of parasitic potentials on the boiler body, lack of grounding or low voltage of the supply network can cause problems with ignition. I often hear the argument: everything used to work without grounding. No one will understand how the boiler worked without grounding. According to the operating instructions, this must be done! For normal operation of the boiler there must be: a network voltage of at least 180 volts, a potential between the neutral and ground wires of up to 10 volts, and the presence of grounding.

Lack of gas on the burner. The gas valve controls the gas supply to the burner: it opens and modulates (gas dosing). The gas valves are regulated and controlled by a control board. Accordingly, the cause of the problems may be a malfunction of the valve (or the need for adjustment), its electrical part, or the control circuit on the board. This device should be checked by a specialist. The lack of gas can also be due to external factors: a faulty meter, dirty filters.

Control board. In some cases, lack of ignition or flame control is caused by a malfunction of the boiler main board. This can be considered after the other possible causes as described above have been accurately checked.

Key error codes

Let's try to take a much more detailed look at the error codes of Oasis boilers, and the potential reasons why they appear.

Error

e1. Indicates ignition failure, potential causes:

There is no gas supply to the device. It is necessary to check whether the gas valve is open, if not, open it. There may also be insufficient or, on the contrary, excessive gas pressure; to eliminate this, you need to contact the gas service.
The contact connection is broken or missing. It is necessary to check for open circuit and short circuit using a multimeter. They may have oxidized; in this case, clean and separate the wires.
The board is broken. You need to test it and, if it breaks, replace it with a new one; this type of repair requires the necessary qualifications. Boiler control board
The ignition control electrode is broken. First, clean it using a steel brush and look visually to see if there is any damage to its body. If you find a defect on it or its wire, replace it.
The plug is not installed correctly in the socket, replace it with the other side

Error

e2. Lights up if the air pressure switch does not close 8 seconds after turning on the fan.

The reasons may be:

Contamination of the pipe or chimney. It is necessary to check the presence of draft and clean the chimney. It will also not be unnecessary to open the firebox, there are 2 pipes connected to the monostat, remove them and blow them out. The relay that controls the air pressure has broken down. Test it to ensure it is working properly and replace it if necessary. The fan stopped working

You need to check its serviceability, look at it with great attention, there are tubes in it, you need to check their integrity, whether they are melted. Next you need to turn on the boiler and after the fan starts working, short-circuit the two wires going to the monostat

Boiler fan Oasis

If the boiler

If it lights up, it means the monostat is broken and needs to be replaced, and if not, then the problem is in the control board.

The electronic part of the device is faulty, or the cable is coming off somewhere. Perform a visual inspection of all connections of the device and the integrity of the wires. If the board is faulty, then it is better to ask professionals to repair and diagnose it.

Error e6. This means there is no flame. What to do if a similar difficulty arises?

The following needs to be removed:

Presence of stray flame. There may be air accumulation in the system. Try a secondary restart. The connection in the wires is broken. It is necessary to check its impeccability and integrity. Methods for connecting wires One of the board components is broken; it is responsible for starting the device. You need to test the board.

Error e7. Low pressure or small amount of liquid in the hot water supply system.

There is little water in the system, the basis may be a leak in any of the system components, this can be created using a dry cloth

It is necessary to check everything with great attention and if a leak is found, remove it. This can be achieved by using specialized sealants, tightening the joints, and using high-quality sealants. The pressure level in the expansion tank is not adjusted

Just as when heated, the liquid becomes wider, the pressure in it increases and the liquid is discharged using the valve. It is necessary to strictly follow the characteristics of a particular model and adjust the desired level of pressure in the system. Expansion tank in the heating system And, of course, the problem may lie in the electronic board of the device itself. It is worth inspecting the board for separation of contacts and other damage.

Error e9. It indicates that the pump has stopped working, or that the pressure in the system is unacceptable.

The level of favorable fluid pressure in the system varies from 0.1 to 0.15 atm. It is necessary to check the serviceability of the water pump by removing it in advance. If necessary, clean the pump, rinse it, check the integrity of the blades. Broken control board

Needs replacement. You also need to pay attention to whether the temperature sensor is working properly.

Localizing the problem of boiler malfunction

With the development of modern low-rise construction and gas networks, the boiler has become a common household appliance in every house or apartment. Basically, after installation, the boiler does not cause users any trouble. Modern boilers operate completely autonomously and require only regular maintenance or inspection. In our opinion, the average operating time of units before the first breakdown is from 4 to 6 years. Some users encounter problems even after 9 years, and some, on the contrary, earlier. In this material I will tell you what can be done if the boiler simply does not turn on, and I will also consider the most common malfunctions of gas boilers. The concept of “does not turn on” can mean completely different problems:

There is no indication (the display is not lit)

The boiler does not operate in any particular mode

Therefore, these different situations should be considered separately in detail. Please note that to eliminate some malfunctions, user intervention is sufficient, but in some cases it is necessary to call a qualified specialist.

Safety fuses

It is also worth paying attention to the location of the fuses. In some boilers, depending on the model (for example, Ariston, Buderus, Vaillant), the fuses are located on the board itself, and in some, before they are connected to the board. If there are no problems with the electrical connection to the boiler, you should check the integrity of the fuses (with the same multitester in the “continuity” mode).

If the fuses are intact and there is 220 volts at the control points. but it is likely that the boiler does not turn on due to a malfunction of the control electronics.

If during the inspection it turns out that the fuses have blown, then there was at least a problem with the power supply. In this case, it would be correct to first conduct research on the actuators (fan, pump, priority valve) and boiler wiring for a short circuit. However, in practice, even representatives of specialized organizations simply replace the fuses with good ones and check the boiler in operation. If the fuses blow again, then sequentially turn off the high-voltage parts of the boiler to identify the problem area (this is not a recommendation for action! This approach is not entirely correct).

Several spare fuses are usually supplied with the boiler.

If the fuses blow due to damage to one of the actuators, it must be replaced (or the cause of the short circuit must be eliminated). In the case where it is proven that the mechanisms (and wiring) are in good working order, the control board itself remains. Blown fuses indicate that there was an unacceptable load on the electronics (thunderstorm, pulsed power surge in the network), so the cause of the malfunction may also be a short circuit on the board itself.

Internal structure of Oasis boilers

One of the characteristic features of the modifications is the presence of a closed combustion chamber. Air intake is carried out from the street, using a coaxial chimney. Combustion products are also removed through the pipe. This makes the operation of boilers as safe as possible. In addition, due to the closed firebox, gas consumption is significantly reduced.

Separately, we can note the presence of two heat exchangers. This solution increases the speed of heating water for domestic hot water, and also allows the device to be started in summer mode, which increases its efficiency.

All Oasis wall-mounted double-circuit gas heating boilers have a high degree of autonomy, achieved thanks to an internal structure that includes:

Burner - a pressurized type device is used. The connected burner is controlled automatically. Electric ignition is provided. Photo sensors are installed on the burner to monitor the presence of gas. After a power outage, the gas supply to the burner is blocked. The boiler uses a coaxial chimney. It simultaneously takes in air and removes combustion products. Not included in the basic package.
Safety group - 2-circuit mounted gas heating boiler Oasis has multi-level protection that prevents spontaneous combustion and the occurrence of explosive situations. Provided: water flow sensor - monitors the pressure of the water supply and heating system, blocks operation if it drops to critical levels. Relief valves are installed to help in case of overheating of the coolant. When the room temperature drops, the antifreeze system is activated, maintaining minimal heating of the heating system.

Oasis boilers have been certified and received permission to operate by Rostechnadzor. This made it possible to operate equipment from a Chinese manufacturer throughout the Russian Federation.

What to focus on in operation

Boiler piping - the internal structure of the boiler contains a circulation pump and an expansion tank. During installation, you will need to additionally install a filtration system. The automation is sensitive to voltage drops, which is one of the main disadvantages of the Oasis boiler. To eliminate possible failure of the control board, you need to connect a UPS. Lots of noise – the forced-air burner is noisy. The noise level requires installation of the boiler in a separate room. The technical characteristics declared by the manufacturer in this regard are somewhat different from what actually happens

It is especially noisy when the DHW is turned on.

Coaxial chimney - it is extremely important to comply with the installation requirements, strictly adhere to the maximum height, angle of inclination and other parameters. Productivity and efficiency ultimately depend on a quality installation

Chinese doesn't mean bad

All components from the closed combustion chamber to the temperature sensor are checked for quality and compliance with standards. The only condition for trouble-free operation is the installation and operation of the boiler in accordance with all the rules and in accordance with the manufacturer’s recommendations.

The Oasis gas boiler can only operate on natural gas; conversion to liquefied gas is excluded; accordingly, it can be installed in rooms connected to the central gas main.

These devices are double-circuit, designed to heat a room and supply it with hot water for domestic needs. The heating temperature of the liquid ranges from 35-60 degrees, the hot water supply capacity is 10 liters per minute.

Equipped with a closed combustion chamber, which significantly reduces gas consumption. The operation of the burner is controlled automatically; there are photo sensors on it that monitor the presence of gas. A coaxial chimney is used for smoke removal; the air required for the combustion process comes from the street.

The design provides two heat exchangers, one for the heating circuit, the second for heating the DHW liquid. Thanks to this, the heating time of the liquid is reduced, and it is also possible to use the boiler in the summer.

It is possible to connect to a room thermostat, which is not included in the package; it must be purchased separately. For safe operation, there are relief valves that are activated if the coolant temperature exceeds the permissible limits. Also, for safe operation, there are flow sensors that monitor the pressure in the heating circuit; in case of non-compliance with the standards, the operation of the system is blocked.

Localizing the problem of boiler malfunction

With the development of modern low-rise construction and gas networks, the boiler has become a common household appliance in every house or apartment. Basically, after installation, the boiler does not cause users any trouble. Modern boilers operate completely autonomously and require only regular maintenance or inspection. In our opinion, the average operating time of units before the first breakdown is from 4 to 6 years. Some users encounter problems even after 9 years, and some, on the contrary, earlier. In this material I will tell you what can be done if the boiler simply does not turn on, and I will also consider the most common malfunctions of gas boilers. The concept of “does not turn on” can mean completely different problems:

There is no indication (the display is not lit)

The boiler does not operate in any particular mode

Varistor and power supply

Often, if the boiler board is damaged, burnt or charred elements can be visually detected on it. A varistor is a protective element of the board that is installed at the input of the circuit. In most cases, this is a blue round part (but not necessarily). When the rated load is exceeded, the varistor is destroyed and opens the circuit. In some cases, if the varistor helped prevent damage to the electronics, biting it out is enough to eliminate the gap in the circuit. Important! Although the board circuit will work without a varistor, it should be remembered that the varistor is a protective device and the correct solution would be to replace it. The power supply is a microcircuit that is also damaged primarily by pulsed power surges or during a thunderstorm. If cracks or damage are visible, the boiler board will likely need to be diagnosed and repaired.

Insufficient draft (fan does not turn on)

Also a popular problem. If there is a problem with the removal of combustion products, the boiler will not start and ignite until it is completely eliminated. Such malfunctions and their solutions are described in more detail in a separate article. chimney errors.

Water (moisture) getting on the board

Types of wood fuel

Wood fuel obtained directly from wood processing plants

Technological chips.
Sawdust.
Lumber scraps.
Cuttings from lamellas.
Trimmings from timber trimming.
Top farmers from whip logging.
Roundwood debris resulting from processing.
Sorted low-quality firewood is not suitable for production.
Gorbyl.
Tree bark.
Scraps from the production of plywood, chipboard, mdf and osb.
If there is a railway section on the territory of the woodworking enterprise. loading and unloading of wood, then the waste from this link can also be used as fuel.

This fuel was obtained during the production process at the enterprise. Its utilization as fuel is simply a vital process for many. The disadvantage of this type of fuel is that it is not always fully prepared for combustion and is heterogeneous.

The advantages of such fuel include its low cost and, of course, the ability to transfer production to a higher level - waste-free production. Taking into account all the pros and cons when choosing a combustion technology, it is necessary to take into account all these factors and only then select a boiler. We'll talk about this below.

Wood fuel made specifically for heat production

Such fuels include:

Pellets. Today we will look at pellet boilers, but they are not yet very actively used in industry in Russia.
Eurodrova.
Charcoal.

This fuel is much more convenient to use for heat production, since it is already prepared in all respects:

Its heat transfer is much higher, which means that the amount of fuel required to produce one volume of heat is less than that of firewood.
When using special wood fuel, less waste is generated on site.
The presence of various foreign inclusions is practically excluded in the prepared fuel.
Ability to operate on fuel in semi-automatic and automatic modes.

Why does the gas boiler not turn on, start, or ignite?

Over the years of uninterrupted operation of gas heating equipment, you have probably become accustomed to warmth and comfort. But suddenly the boiler stopped turning on, the burner did not light, and meanwhile the room quickly cooled down. We have to look for the reasons for the failure in order to restore the operation of the equipment. Our recommendations will help you find the problem and fix it on your own.

Fan fault

All boilers with a closed combustion chamber - such as Buderus. "Wolf", "Danko", "Lemax" - equipped with fans. They forcibly discharge combustion products into the street. If you hear strong noises when the blades rotate or do not hear operating sounds at all, carry out diagnostics and replace the element if it breaks.

Other faults

To find other problems, it will be useful to know the structure of the boiler you are going to repair. “Aton”, “Siberia”, “Buderus”, “Ferolli” or another brand may have their own characteristics. But the following sensors and components often break down:

Circulation pump. If it fails the boiler may make noise and the flame in the burner goes out. In such cases, the equipment will not work for heating and hot water supply. The only solution is to replace the pump.
Igniter. Incorrect pressure adjustment results in flame failure. The protection is triggered and the operation stops. Set the correct fuel supply.
Burner. The appliance has switched off and will not re-ignite. Check the burner nozzles for blockages. Clean them from soot and dust. Also clean the sensor photocell and try ignition again.

Diagnostics and replacement are also carried out in case of breakdown of the thermocouple, pressure and draft sensors.

Does the device not start after turning off? Check the remote control, replace the batteries. Examine the display. If it does not work, diagnose the controller.

Heating equipment that is additionally connected to the network suffers from power surges. If the values are lower or higher than the nominal value, the unit will not work. It is recommended to connect a voltage stabilizer.

It is important to understand that a boiler emergency stop can happen for a variety of reasons. It's good if a code appears on the display. For example, the “Protherm” model display may display error A6. This means that the temperature in the room has dropped and you need to connect an additional heater. So, thanks to symbolic codes, it is easier for the user to detect the problem. In other cases, you will have to check all boiler systems.

It is always easier to prevent a breakdown than to repair it. Therefore, monitor the operation of the boiler and carry out maintenance once a year.

Sources:

https://thermo-lider.ru/gazovye-kotly/neispravnosti-gazovogo-kotla/kotel-ne-vklyuchaetsya/ https://homeasking.com/ne-vkljuchaetsya-gazovyj-kotel/ https://cosmo-frost. ru/gazovye-kolonki-i-kotly/neispravnosti-gazovye-kolonki-i-kotly/oshibki-i-neispravnosti-gazovogo-kotla-koreastar/ https://cosmo-frost.ru/gazovye-kolonki-i-kotly/ neispravnosti-gazovye-kolonki-i-kotly/pochemu-ne-vklyuchaetsya-ne-zapuskaetsya-ne-zazhigaetsya-gazovyj-kotel/

Design and principle of operation of Corestar boilers

Despite the name, Koreastar gas boilers have nothing in common with Korea. These are European boilers, designed specifically for Russian conditions.

Wall-mounted boilers Koreastar (Korea Star) have a classic design - a circulation pump, two heat exchangers, a closed combustion chamber, an automatic bypass valve, and safety groups. These devices can easily withstand voltage surges of 15% and have a flow capacity of about 13.6 liters per minute (DHW). They are designed to heat rooms up to 240 square meters.

Many models have copper double-circuit heat exchangers, which are made according to the “pipe-in-pipe” principle and, thanks to the anti-corrosion coating, are resistant to heat.

The models are equipped with built-in functions aimed at preventing freezing, as well as a pressurized burner, which is of a modulating type.

Anti-blocking systems for the gas valve and pump protect the combustion chamber from water hammer. Boiler productivity reaches 32 kW. Koreastar gas boilers are quite noisy. This is due to the working forced-air burner, so it is recommended to install it away from housing.

Hot water is heated independently of the heating system. Thanks to the presence of an electromagnetic three-way valve, the heating speed is significantly increased, and a uniform supply of heated water is ensured regardless of the system pressure.

Motorized 3-way valve

When the system temperature drops to +5 degrees, the boiler starts automatically, preventing the system from defrosting.

How to solve a problem with turning on a gas boiler

The board is installed in all modern models. This is a control panel with a display with special indicators. If the data is not displayed, you need to check the power supply to the main panel. The first step is to check a separate channel, through which the device connects to the network. It is important that it is turned on. The voltage on the multimeter should not be equal to 220V on the sections connected to the control panel. The absence of voltage will allow the fault to be localized. Sometimes it's all about the plug that goes into the socket.

The integrity of the fuses is also checked. If the main reason is in the ventilation part, then you should:

ensure ventilation of the room;
install window supply valves;
Leave the windows open.

Remember! Before turning on the burners, it is recommended to check the draft. A burning match is brought to a horizontal section of the chimney. If the flame moves to the side, then everything is in good condition. An even flame is a sign of lack of draft. Then you will need to check the chimney.

Pipes are checked for leaks. To do this, they are lubricated with a foamy layer of soap. Bubbles appear in the section where there is a leak. In this case, it is necessary to close the valve, ventilate the room and call the appropriate emergency service.

Important! When searching for leaks, it is unacceptable to use burning objects. Soap solution is an indispensable tool.

If the meter malfunctions, the readings remain the same and there is noise. It is unlikely that you will be able to fix this on your own. It's better to seek professional help.

Mechanical shutdown of the device occurs when the traction is interrupted. The reason is natural factors. These include sudden changes in atmospheric pressure, strong winds and other adverse weather conditions. To avoid such a shutdown, it is important to comply with the chimney pipe installation standards.

A rise of more than half a meter above the ridge.
From the ridge one and a half meters - above the ridge more than half a meter.
From 1.5 to 3 m, equal to the ridge.

Following these standards during installation will protect against blowing and thrust in the opposite direction. A powerful kitchen hood results in excessive air flow. Therefore, during boiler work, it is better to turn it off.

Insufficient draft may cause blockages and damage. In the first option, we are talking about a stationary chimney that is covered with ice in winter. The release of hot steam leads to the formation of condensation, which freezes on the surface. The solution is insulation. In case of serious damage and burnout, the only way out is to replace the pipe.

One of the most problematic breakdowns is jamming of the pumping device. If the unit cannot be turned on after a long shutdown, then antifreeze is used. The property of the liquid not to freeze even on frosty days allows you to turn on the boiler .

Parapet boilers are equipped with fans. Unusual noise from rotating blades, or absolute silence are also reasons for a thorough diagnosis. If there are sounds, you need to inspect and replace the faulty parts.

The burner is checked for blockages. You should clean it and the sensor photocell from dirt. Then try turning on the boiler.

The remote control batteries need to be changed and the display rechecked. If the remote control breaks down, the controller is checked.

Sometimes when heating equipment is turned on, there is a smell, regardless of the fact that the rest of the equipment is working properly and the outside air temperature is at least 10 degrees. The reason lies in a clogged igniter tube.

Problems can also arise if the quality of the supplied gas is not very good. If there is a possibility of scale formation, then the maximum heating is set to check. Increased noise confirms the presence of scale. In such situations, a chemical solvent is added to the heat exchanger and then washed off.

In order to understand why the boiler does not turn on, you first need to inspect it. Next, identify the error and try to fix it yourself. If the problem is difficult to solve without professional help, then it is better to wait for the technician to arrive.

Installation and connection

The Oasis boiler is a wall-mounted model. Unlike floor-standing devices, it does not require boiler room equipment; it can be installed even in small rooms.

Fastening is done either with anchors or large screws, since the weight of the boilers is comparable to the weight of a regular gas water heater, and the dimensions are approximately the same.

The described gas boilers are produced with a closed combustion chamber. What does this mean? To ensure the combustion process, an air flow is required. A device with a closed chamber in this regard is isolated from the room in which it is mounted. Air is supplied from outside using a fan equipped with the boiler.

Therefore, before purchasing the Oasis product, you need to think about installing a special coaxial chimney. For private houses this is not a problem, but installation in an apartment will require specialist advice. Although such models are considered safer and more environmentally friendly.

The boiler does not work in DHW or heating mode

And finally, situations when the boiler does not operate in a particular mode. They happen much less frequently compared to others. In this case, it is likely that the boiler will need to be diagnosed by a specialist. The process of ignition and operation of the boiler in different modes is virtually the same, with the exception that different modes may have different power. In hot water preparation mode, the boiler power is usually full, but in heating mode it can be minimal. You can read about problems in the operation of the DHW mode in a separate article.

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Insufficient water pressure (refill required)

Traditional gas boilers operate in a closed heating system; accordingly, to prevent the boiler from turning into a hydrogen bomb, there must be a minimum water pressure inside the heat exchanger (in fact, the presence of water and circulation there). The pressure is controlled by a special sensor - a pressure sensor. The boilers are provided with an additional mechanical pressure gauge for the user. Although the systems are closed, the pressure in them can drop over time (for example, water escapes through leaks in the connections). As soon as the water pressure in the boiler drops below the minimum level (0.5 - 0.7 bar), the boiler sensor detects a malfunction and blocks operation. In most cases, you just need to study the readings of the mechanical pressure gauge and recharge the system according to the instructions for the boiler.

Display board

For some boiler models (Vaillant, Ariston, Navien), the control unit consists of a main board and an information board (display board). The boiler may also not turn on if the display board is broken. The display board, unlike the main one, is cheaper, but most often cannot be repaired. In this case, the fault can only be identified by replacing a known good part.

If the gas boiler is working, there is an indication on the display, but it does not start or produces errors, further diagnostics are required.

The boiler does not heat water for hot water supply

In addition to the lack of heating of the heating system, it happens that the gas boiler does not heat the hot water supply circuit.

After all, scale has a structure that limits the passage of coolant and also takes away its heat. This is due to the thermal conductivity of salt deposits - it is much lower than the thermal conductivity of the metal from which the heat exchanger is made. Therefore, the boiler does not heat hot water well.

It is also possible that a piece has come away from the salt deposit, blocking the flow completely, which leads to a complete stop in the supply of hot water.

Structurally, the sensor is a paddle device through which water flows, which is the condition for its operation, because it sends a signal about the presence of a flow to the electronics, which, in turn, starts heating the water again. It happens that the sensor gets clogged, but it can be cleared of the blockage without removing it.

The device has the shape of a cylinder and is located near the circulation pump. To start cleaning, open and close the tap near the sensor. If this does not help, then it should be unfastened and removed, cleaned by hand and reinstalled. If this does not help, then the sensor is most likely faulty and needs to be replaced.

It is designed to shut off the heating system when the hot water tap on the mixer is opened. If the valve does not work, the boiler does not switch to heating water for DHW from heating water for heating. The first reason for its failure may be clogging with corrosion products, which needs to be removed.

If this does not help, the valve should be replaced. The hose system and filter may also become dirty. This problem is barely noticeable on the heating circuit, but on the hot water supply circuit it will be more noticeable. These elements need to be cleaned.

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The main reasons why a double-circuit boiler does not heat water well

Parallel connection of two devices or overflows in a plumbing tap

In this case, the hot water leaving the boiler reaches the tap when it is almost cold. The reason for this is the so-called admixtures. People sometimes use an electric boiler together with a boiler, and after turning it off they simply forget to turn off the water supply. What ends up happening? Part of the water entering the tap is heated in the boiler, and the second passes through the cooled boiler. Then a mixture of both parts occurs with a natural decrease in temperature. Due to overflows, there are often cases of mixing cold and hot water in single-lever flag mixers. This is not a breakdown, but a slight disruption in the operation of the system that can be easily eliminated. If the user has set the maximum temperature, and the water coming out of the boiler is slightly warm, then the cause of the malfunction is the boiler itself or its power supply system.

Scale formation in the three-way boiler valve or in the secondary heat exchanger

three way valve made of brass

Water contains many different impurities, which, when heated, are deposited on heated surfaces. About the same thing happens in your kettle, only in much smaller volumes. The thermal conductivity of such salt deposits is several times lower than the thermal conductivity of the metal of the heat exchanger. Gradually, the scale layer increases so much that it begins to peel off in flakes, which are carried by the coolant flow either into the three-way valve or into the secondary heat exchanger. When scale gets into the valve, it interferes with its normal switching. Because of this, part of the coolant is discharged into the heating system. As a result, the amount of coolant for heating water in the secondary heat exchanger decreases and the gas double-circuit boiler does not heat hot water. What if scale gets into the secondary heat exchanger itself? Then the normal circulation of the coolant through the small boiler circuit is disrupted. In turn, this leads to a decrease in the amount of heat required for heating. It is worth considering installing special magnetic or electromagnetic filters to help fight scale formation.

Clogged secondary heat exchanger due to poor quality sanitary water

Boiler secondary plate heat exchanger

Poor tap water allows deposits to accumulate in the heat exchanger. Heat transfer deteriorates over time, and the boiler stops heating water normally. Sometimes this problem can be solved by flushing, but in some cases the secondary heat exchanger will need to be replaced. If the bithermal heat exchanger fails, you will have to replace it. Please note that this item is not cheap.

Narrowing of the gas pipeline or fuel starvation of the boiler

If the gas pipeline is severely clogged, or its flow area is narrowed, this will lead to gas starvation of the boiler. In simple terms, the boiler will not have enough gas to reach its maximum power and therefore it will not heat enough water.

Failure of the gas valve or its incorrect setting by the user

Boiler gas valve

The valves of some boilers stop working when dirt or dust contained in the gas gets in. As a result, the valve begins to jam and it stops opening at full capacity. The process of heating water is naturally disrupted. In rare cases, the valve settings are so messed up that the boiler itself cannot work as expected. You will need to adjust the boiler automation or completely replace it.

Insufficient pressure in the heater

The water supply valve may stop opening due to a small volume of liquid in the system that does not create the required pressure. Check the operation of all fittings and valves, as well as the pressure of water flowing from the mixer. If there are no leaks and low pressure, replenishing water in the expansion tank will help.

The seventh reason is air locks in the pump, leading to malfunctions. In these cases, the pump is disassembled and checked to determine what caused the blockage.

Another reason for the lack of hot water in a double-circuit boiler may be a malfunction of the water flow sensor; they often stop due to the ingress of foreign particles. The sensor must be disassembled, thoroughly cleaned and its turbine washed.

Having established the cause of poor water heating, proceed to eliminate it. Manufacturers often make the mechanical components of devices accessible for maintenance, which facilitates the repair procedure.

Attention! Do not try to repair the boiler yourself if you are not confident in your own abilities. But, if you have already decided to repair it yourself, do not forget to disconnect the heater from the electrical supply.

To ensure that your gas boiler lasts as long as possible, always follow the operating instructions. Read the instructions carefully. Carry out preventive examinations regularly. Remember that repairs will cost you more than a planned replacement of parts or manual descaling.

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