Does not turn on the gas boiler Koreastar

Repair and regulation of boilers Korea Star

Faulty gas boiler Koreastar. It always comes on and off (about every 10-15 seconds).). Tried different modes (air temperature, heating fluid), checked the filter, water pressure is normal. There was some kind of accident on the gas line the day before, maybe this malfunction has something to do with it. I need help in the form of advice. Yes, I did not say yet, it does not give any error. There was an error in the gas line when there was an accident. No error now, but it does not want to work normally. It used to work fine for hot water. And now does not have time to heat water normally (turns off after a few seconds).

Check the gas pressure. A piece of transparent hose, about a centimeter in diameter, to fit tightly on the connector on the gas supply. Length of half a meter. Pour water and put one end on the connector having previously unscrewed the screw in the connector. The difference in water levels in the tube, expressed in centimeters will be equal to the gas pressure in millibars. According to the documentation, the unit is operable at a pressure of at least 4 mbar. Pay attention. If during the start of the boiler there is an increase in water pressure in the system, and at the extinguishing return to the initial pressure. It is worth to look, whether the water filter (on a return) is not clogged. I had a similar situation. No error displayed, ignition, lights 3-4 seconds., goes off. After 12-15 seconds again ignition and t. д. Round and round. It turned out that the main filter (cartridge) clogged with slime (I believe it was bacteria) and the water did not circulate. Replaced the filter cartridge. Everything is back to normal.

In operation gas boiler Korea Star Premium. Interesting, this is the second time I see a malfunction associated with poor water circulation. I had a disrupted DHW circulation, a disrupted DHW circuit. There are sensors of flow both DHW and HTW, why not assign an error code to violations of circulation and not output to the remote control, since soon both sensors are available? Let’s take my situation: the filter was clogged. Boiler turns on for a few seconds and then shuts down. Water flow sensor. Sound, no shorts or interruptions in its circuit, the amount of water in the system is normal. There is no error here, in fact the device does not show any error. The sensor is good and reacts to a lack of circulation, by switching off the burner. That would be some code to assign and display in this situation, so it was clear that there is no circulation.

And the card reads both the same way, as a lack of signal from the flow sensor. If there is not enough water in the system, even if the pump is working fine, but the energy dynamics of the flow is not enough to raise the flag of the flow sensor. For this you need a full-fledged dense flow through the entire cross section of the pipe. If the signal that the sensor is triggered, appears immediately when you turn on the boiler, before the pump starts working, it is perceived as a short circuit sensor. If the pump has stopped, but the signal is still on, it is the same as a short circuit. But of course it’s not always a short circuit. It happens, the flag hangs in the working state.

Trouble with the Koreastar boiler. It runs for some time (10-20 min) and shuts down with error code 05. Temperature is set to maximum. So it doesn’t turn off by temperature. We’ve changed the RH sensor twice already. The technician doesn’t know what’s wrong. He says we need to change the control board. Help, we freeze, especially at night, have to constantly get up and reset the error (reset button), it starts up again.

There is also a wire from the sensor to the board, check or change it.

Installed the boiler Koreastar 24, only works 3.5 years. Now there is some crackling, as if the water in the kettle boiled and it cracks from the heat. Even when the system is not working, the crackling is constant. No errors, the pressure is normal. What to do and can I continue to use?

I think you need to flush the heat exchangers, both the main outside and inside, as well as the secondary. If the boiler is two-circuit with a booster, which you can assemble yourself. I myself just yesterday encountered this problem. Cleaned the inside and outside of the heat exchanger, put it into operation and it worked like new. The house (heated area of 220 m2) is warm and comfortable, the neighbor now asks to do the same with his unit. So preventive maintenance should be done once a year before the heating season, the cost in time 2 hours and the whole season without any problems.

Carried out installation and startup wall mounted boiler Korea Star 24, 4 months ago stopped working. After the breakdown, it was repaired. What was the cause of failure do not know, but they said that the fuse burned out (the unit did not turn on). I have hot water is variable, then cold, then hot, or after lowering the water, about 50 liters, it starts to go hot. What’s the problem, tell me?

The three-way valve is defective. Either clean or replace.

Korea Star boiler malfunction. Everything was fine until yesterday: it’s still warm outside, turned on summer mode, t. е. We’re only heating water! But began to notice that when you use hot water for a long time, heating warms up, and a lot. The radiators are boiling. I read somewhere that it’s a three-way valve. Is it so and what to do with it?

First I would like to know what material is made of your heating system? If cast iron and steel, you could try flushing the whole unit. At repairmen have such service, as indiscriminate chemical flushing of boilers and heating systems. However, you can do it yourself. The three-way valve can be changed, of course, but what good is it if the system is dirty. It won’t last long. I don’t know what the three-way is. Have not had to repair on these units so far, but in most cases flushing will help restore the operation of the 3-way valve if it is still serviceable. Clean the filter on the “return” at the same time. If you have it, of course. If not, you should definitely install it and prolong a little service life of your appliance.

Do you know if it is possible to check the pump to see if it functions correctly?? Tube burst and water leaked into the pump orifice where the winding is. All dried, put it back. Coreastar boiler is trying to start, comes to the point of starting the pump, and it does not turn on! I wonder what the problem is, or the board flooded that the pump and further ignition of the burner is not happening or the pump just does not turn on and is canceled. No errors, the remote control only displays the water temperature and no further action. The new pump is expensive, is it realistic to check and whether it can be repaired??

Check the resistance of the first better electronic multimeter, operating resistance of 220 ohms, anything below, such as 195 ohms already says about the inoperability of the winding well and the easiest way to connect the socket 220 V and if the pump starts, it works.

Diagnosis of faults and malfunctions in the gas boiler Koreastar Buran

Koreastar Buran boiler can not start. When you hold the on/off button, the burner lights up. If you release the button, the appliance fades out. What is the reason for the malfunction??

Suspect defect in thermoelectric converter or gas valve. There is also a decrease in gas pressure at the inlet line. Sometimes there is a lack of voltage control board.

A malfunction is detected. It is difficult to switch on. Igniter lights up, but there is no flame on the main gas burner equipment. Please tell us the cause of the problem?

Parts of the ignition mechanism are most likely damaged. You need to have the boiler serviced and the ignition unit cleaned.

Why the floor standing gas boiler Koreastar Buran 10 does not turn off after the set temperature? It heats up to 85 degrees, followed by a malfunction. After restarting everything starts all over again.

Most likely the board is damaged, the boiler water temperature sensor is broken, the safety sensor button is broken. It is possible that the automatic settings have failed.

I would like to know why the coolant temperature does not rise above 70C? We are trying to set more, but the display shows that this is the highest value. How to adjust the heating?

If the unit cannot increase the temperature of the heating system, the following factors are likely. In the settings set the limit on the maximum temperature of heating to 70 C. The chimney draught is reduced.

Gas boiler Koreastar Buran 16 fails to perform satisfactorily in the heating process of the hot water circuit. From the tap in the kitchen is flowing alternately cold and hot water. Explain why this malfunction occurs?

At the bottom of the boiler is a faucet, from which water is constantly leaking. The unit itself cannot be started. What you have to do?

Apparently there is a discharging of the coolant from the protection group valve. This symptom indicates increased pressure in the system. Or the fill valve in the system may have been left open or the expansion tank needs to be pumped in.

Can you tell me what the problem is when the pressure is increasing 24 hours a day and the water bleed valve is triggered?? The heating symbol always appears on the display when the boiler is heating. What you can do?

The temperature sensor in the heating circuit is defective. There is no normal circulation in the heating line.

What is the problem, if the boiler Buran 12 repeatedly turned off.5? For example, yesterday the ignition element did not work at all. The boiler has been serviced that month. What could be?

There seems to be a problem with the smoke exhaust device. You should look at the chimney. Failure of the ignition element means a defect in its parts due to a voltage drop or water leak.

Help me out with the chimney? For 2 days there is a reverse draft, because of which the smoke goes straight into the room. I made the chimney myself. It is a pipe made of steel. There must be some mistake.

Boiler functions perfectly in the DHW cycle, but when you turn on the heating water immediately reaches boiling point and the appliance stops working. What can be faulty and how to fix it?

Probably the circulation pump is defective, the control board is broken, the temperature sensor is broken. Also, the filter mesh could be clogged.

In the hot water cycle, the appliance alternates between hot and cold water. I do not understand what the problem is. How to correct the heating medium temperature myself?

Apparently the heating system is clogged or the heat exchanger needs to be cleaned. In addition, there may be a malfunction of the flow sensor or the circulation pump may have broken.

An important factor is the chimney is not properly designed. Sometimes there is soot contamination, which greatly reduces its capabilities. In addition, it is advisable to check the ventilation in the house.

Installed a week ago a boiler Koreastar Buran. The unit quickly reaches a temperature above 96 degrees, but then crashes with an error. Later, when it cools down, it starts to start automatically. What it depends on?

Failure of the overheating function means no circulation of the coolant. First you need to check the radiator valves. They should be in the open position. Then check for cleanliness of the dirt filter, and you should also make sure that the heat exchanger is free of dirt.

Started this unit in March. After about five months, the unit began to make some noise. Tell us why it makes so much noise?

It is likely that the heat exchanger has a scale. If the water is hard, then later lime is deposited in the radiator tubes.

Consider installing a floor standing gas boiler Koreastar Buran 16 in a private house. Please advise how to put it into service?

To put this appliance to work properly, you must do certain things. Switch on the power supply to the appliance. Open the gas tap. Then start the main burner. Finally we adjust the temperature to the desired level.

We are planning to do a service. Advise how to properly drain the heating fluid from the unit?

According to the instructions, this work is done as follows. Disconnect the appliance from the mains. Close the gas valve. Open the automatic air vent a bit. Open the tap for the drain. Then clean up any spilled water. Alternatively you can drain through the safety valve. This component is located on the bottom of the unit.

Tell me how to diagnose the operation of the 3-way valve? It is suspected that it is not opening correctly. In the heating cycle, the last radiators are poorly pumped, although in DHW mode, the heating pipe under the boiler is heated.

It is indeed recommended to check the three-way valve for the presence of acidification of its piston rod in the intermediate position. We also advise to make an inspection of your heating system.

I use a boiler Koreastar Buran 20 in the apartment. Up to this time it was working properly. At present, after 1 minute of operation, the device switches off.

The main error codes

Error a01. no flame signal. No gas supply or defective gas valve or electrode ignition. The control board may be malfunctioning.

Check all shutoff valves and bleed the water line if necessary. Check the gas pressure on the valve. it must be 20 mbar (2 kPa), as well as the gas valve itself (replace if necessary).

Check electrode for debris and check clearance between electrode and burner. It must be 3 mm ± 0.5 mm.

Fault a02. flame signal is false. Control board or ignition electrode is defective. Check for mechanical damage on the electrode itself, it may be touching the burner. Also set the required clearance between the burner and the ignition/ionization. 3.5 ± 0.5 mm. Replace control board, in case of its failure.

Coreastar boiler ignition electrode

Error a03. boiler overheating. Bimetal overheat sensor (also called emergency thermostat) is blocking the boiler. threshold temperature is about 90 degrees. Air in the heating system and/or insufficient water circulation in the heating system.

Boiler should be cooled down and restarted. Replace the sensor if necessary. Remove the air from the circuit. Check the pump. open all the shutoff valves, check the pump blades for contamination and voltage to its contacts. Replace pump if necessary. If a03 appears again, replace the control board.

Fault a08. OHV over temp sensor defective. Temperature limiter gives wrong value. Check for open or short circuits and replace if necessary.

Error f05. There is a fault in the smoke evacuation system. Fan or air relay not working properly or defective. Clogged chimney.

Coreastar boiler fan

Check the correct connection of the connectors to the contacts of the air relay and make sure the air diaphragm is not stuck. Replace relay if necessary.

F11 error. NTC sensor of internal combustion chamber temperature is defective. Circuit breakage or short circuit of device. Check resistance of semiconductor. it must 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 defective.

F37 error. DHW NTC temperature sensor. Circuit breakage or short circuit of the corresponding device. When this error occurs, the burner will not be able to ignite only in DHW mode. The boiler itself will be able to continue its operation. Check sensor resistance and quality of connectors. Replace parts if necessary.

The same code reports low pressure in the heating system. The hot water pressure sensor is defective or the circuit pressure has dropped below 0.8 bar. Check the sensor, replace it if necessary and check for leaks. Eliminate the problem and turn on the water.

does, turn, boiler, koreastar

F41 error. heat exchanger overheated. Stale heat exchanger circulation or air in the system. Bleed and check the pump according to the description in the manual with the shutoff valve open. Circulation pump must be replaced if necessary.

Coreastar boiler heat exchanger

Error f50. control board malfunction. Control board malfunction. Check if there is no breakdown on the frame, grounding, and in case of breakdown replace the board.

Power tuning

After starting the machine, press and hold for 5 sec. buttons to adjust the temperature to enter the setting mode. Adjust the gas pressure by decreasing and increasing the pressure with the DHW adjustment buttons. During adjustment the figure will appear on the screen. This is the sign of the display. the value of the minimum power in percent: 44-54. When the pressure gauge shows the required pressure, press the RESET button, the parameters will be saved.

When setting the operating power, set the gas pressure with the buttons that regulate the temperature of the VV. The display will show the power value in percent: 0-99. When you have set the required value, press RESET, save your settings, exit setup mode.

Other malfunctions

In addition to the fact that the remote control often displays error codes. Koreastar boiler can still fail due to an emergency situation. So, despite the assurances of the manufacturer that its products can withstand voltage fluctuations, in practice this often leads to the output of the boiler failure.

Control board, can burn out, even from a small surge of electric current. Therefore, it is recommended to use these boilers in the presence of an uninterrupted power supply.

Koreastar is a relatively young company, operating since 2001. In the Russian market it is presented in 2004 and since then has managed to win the trust of customers. Gas boiler Koreastar Star by reviews is simple and easy to operate. If any failure occurs, problems are solved quickly enough due to the large number of service centers. All devices of this company meet the ISO 9001 standard.

How to fix a breakdown on the boiler Koreastar Premium

Gas boiler Koreastar Premium 24 E does not start. If I hold the button down, the burner works. If the button is released, the appliance switches off. What is the cause of the malfunction??

Most likely the thermoelectric converter is defective or the gas valve is broken. There could also be low gas pressure in the gas supply line. Sometimes the voltage of the electronic board is too low.

We have a problem. Start up is very slow. Ignitor lights up, but there is no fire in the main burner. It is not possible to find the reason?

Probably the ignition device has malfunctioned. We recommend checking the boiler and cleaning the ignition unit.

Why the Koreastar Premium Turbo boiler does not stop working when it reaches the desired temperature? Heating up to 90 C, then a malfunction occurs. If you carry out a reset, the situation will reoccur.

Probably the control board is out of order, the temperature sensor has a malfunction, the overheat protection button is broken. It can not be excluded that there was a failure of automatic regulation.

Please tell me why the coolant does not heat up more than 70 ° C? We need to set more, but the display shows that this is the maximum setting. How to increase heating?

If the device can not increase the temperature in the heating system, you can assume the following factors. The maximum heating temperature is limited to 70 C in the preset settings. The draught in the chimney is reduced.

Boiler Korea Star Premium unsatisfactory performance in the heating of the hot water circuit. The faucet alternates between hot and cold water. Tell me what the problem is?

Factors of the appearance of malfunctions are likely to be. Cold water mixing has occurred because the 3-way valve is defective. The heat exchanger is heavily soiled. It is necessary to perform its cleaning.

Water often leaks from the tap on the bottom of the boiler. The unit itself won’t start. What you need to do?

The heat transfer fluid might be escaping through the safety valve. In this case, it means high pressure in the system. You might have had a faulty primer bulb or the expansion tank might need replenishing.

Can you tell me what the problem is if the pressure goes up too often and at the same time the reset valve is triggered? The display always shows a heating symbol when the unit is heating. What to do?

There is a problem with the temperature sensor in the heating circuit. Coolant does not properly circulate in the heating system.

Why is the Premium 13E model periodically shutting down?? For example, the piezo ignition failed to work recently. The boiler was serviced at the beginning of the month. What happened?

We can suggest that there was a malfunction in the smoke evacuation system. Chimney inspection is required. Failure of the piezo igniter may indicate a breakage of some component after a power surge or water has entered it.

Can someone tell me how to solve the problem with the chimney? Soon, the second day, there is a reverse draft, because of which the smoke began to fly immediately into the room. The chimney was engaged in independently. It consists of a metal pipe. Maybe the calculations are inaccurate.

The unit heats the household water well, and at the time of turning on the heating water quickly boils, and the unit shuts down. What is the problem and how to get rid of it?

The circulation pump is probably not working, the control board is defective, the temperature sensor is defective. At the same time, the filter screen may be clogged with debris.

Alternating hot and cold water in hot water cycle. Help me to understand what the problem is. How to adjust the heating medium on your own?

Looks like there is contamination in the heating system or the heat exchanger needs to be cleaned. In addition, the sensor that controls the pressure may be broken, or the circulation pump is faulty.

does, turn, boiler, koreastar

The main factor may be an improperly constructed chimney. Sometimes there is a contamination of the pipe with combustion products, which is enough to reduce its efficiency. It is also necessary to control the exhaust in the living space.

We use the gas boiler Korea Star Premium 24. The appliance suddenly reaches a temperature of over 96°C and then stops due to overheating. Later, when it cools down, it can turn on by itself. What’s the problem?

Ремонт настенного котла KOREASTAR PREMIUM разбор часть первая

Stopping on overheating indicates insufficient circulation in the system. Inspect the radiator valves beforehand. They need to be in the open state. Next, check for contamination of the dirt filter, and you should also make sure that the heat exchanger is not dirty.

Performed my own commissioning of this boiler in 2015. After about six months, the appliance suddenly started making noise. I would like to know why it makes noise?

Possibly limescale clogging of the heat exchanger. When the water is hard, over time lime scale will be deposited in the radiator pipes.

I decided to put a gas boiler Koreastar Atmo in the heating system. Interested in how to put the unit into operation correctly?

For the correct start-up of the boiler we recommend the following measures. Switch on the electrical supply to the appliance. Open the gas valve. Then turn on the burner device. At the end we set the desired temperature.

We need to do service work. Please advise how to drain the heating fluid from the appliance yourself?

According to the manual, this work is done as follows. Disconnect the unit from electricity. Close the gas valve. Open the automatic air vent. Fully open the drain cock. Then remove the drained water. If necessary, it is allowed to drain the liquid through the drain valve. The valve is installed on the bottom of the appliance.

does, turn, boiler, koreastar

Please tell us how to do a check on the three-way valve? I think it doesn’t open all the way. In the heating cycle, the distant batteries are poorly pumped, but the hot water supply pipe under the boiler is heated.

Indeed, it is necessary to check the 3-way valve in relation to the stem hangs in the intermediate position. We recommend in turn to check the heating system itself.

Solutions to the problem 1

The boiler is equipped with a self-diagnostic system and fault signals appear on the display.Faults marked with “A” cause blockage of the boiler. In this case the user must manually reset the boiler by pressing the “RESET” button. Faults marked with the F symbol cause temporary boiler shut-down with automatic reset after the value that caused the fault returns to normal.

Error codes of Koreastar boiler. troubleshooting instructions

The boiler “Koreastar” showed the errors on the display? So the self-diagnostic system “detected” a malfunction. All modern heating equipment is equipped with automatics. sensors that monitor the work of each node. Sometimes the user does not even need to contact the service center. It is enough to determine the value of the code and find the problem.

Heating systems for summer houses and country houses. Boilers, gas heaters, water heaters. Repair, service, operation. Recommendations for installation and installation.

I ran the gas boiler Korea Star Bravo. After about 3 months the water pressure in the unit began to drop. It constantly relieves pressure and stops. That is, it absolutely cannot hold the pressure. Why can’t it hold pressure??

If the device doesn’t build up water pressure, there could be a leak from the make-up valve. If there was a shutdown and the water pressure dropped to zero limit, then there is a defect 3-way faucet.

Вот он газовый котёл Корея Стар (KOREASTAR)

If the boiler is dual circuit, the secondary heat exchanger most likely needs to be flushed. Also check the cold water pressure, if it is unstable, you may contrast when you turn on the hot water.

At the cottage, I want to do the installation of boilers Koreastar Bravo 24 with a secondary heat exchanger. Inform us what are the advantages of this heat exchanger?

This type of heat exchanger is installed in the 2-circuit boilers for DHW. If you open the tap on the hot water. The water, the coolant from the heating system passes through a different pipe to the secondary heat exchanger. It allows you to reduce the temperature of hot water heating to within 75 degrees, and it significantly reduces the deposition of scum. But despite this, the secondary heat exchanger needs to be cleaned. And to implement this is not easy because of the small gaps between the plates. On this basis, it is advisable to change this component. As an advantage, it is worth emphasizing only their compact size.

We use the wall hung Coreastar Buran 16 boiler indoors. Until this morning performed well. Now there has been an accident. The unit constantly overheats. How to eliminate the problem?

It is possible that there is a blockage by limescale and the gas supply is blocked. You need to clean the device.

At the moment of starting the gas burner ignites immediately extinguishes. I think there is no ignition spark. How to fix the problem?

Check if there is a sparking sound of the igniter when the ignition cable is disconnected. If not, it is recommended to change the ignition transformer. If present, replace the ignition electrode or ignition burner.

How to change the temperature in the room?

The autonomous system allows heating the room to a comfortable temperature for the user. There are several ways to regulate. There is a device on the boiler itself, which turns it on and off, changes the temperature of water heating from 38 to 80 degrees. The mode of operation can be set manually. In addition, a thermostatic valve is installed on each radiator. It can be used to create a different climate in each room individually. For example, if the rooms need 20 degrees, the kitchen is enough 18 degrees, the adjustment provides not only optimal conditions for life, but also saves energy. If you connect a thermostat to the boiler, it will be adjusted automatically. There are also outdoor sensors that measure the temperature outside, giving the command to increase or decrease heating.

Installed gas boiler Koreastar Premium, apartment, 2 rooms and kitchen. Radiators 12 12 16 in the kitchen, small room and hall, respectively. A malfunction is that the pressure drops, but not immediately, about 3.5-4 hours the gas boiler keeps the pressure, then begins to lose pressure with each heating cycle, resulting in overnight pressure drops to zero. I set the pressure according to the instructions, 1.8 atm. If the system is topped up when the pressure gets close to shut off, it keeps dropping. If it drops before shutting down the wall boiler due to low pressure and then refill the water. Holds for a few hours again and then starts to leak. No leaks in the pipe system, the same pipes worked in the 7912 radiator configuration for about 3 weeks. It all started with increasing the number of sections and pressure testing, when accidentally raised the pressure to 3.5 bars. (on the pressure gauge is the red zone with 3 atm., I have not been able to get to 4 atmospheres in total., emergency dump valve began to bleed water, no other leaks were found), it was cold, and installing a towel radiator. Unknowingly, I found a nipple on the expansion tank, but the heating system should not have air in it, so I blew it all out. Then I realized it was in vain, emptied the water, pumped air to 1.2 bar. In the tank, put it back in. The master from the gas service came, said that the boiler is fine, most likely a leak in the joints. The plumber has already started to open the screed, because he says himself, I want to make sure of them again. Everything happens if the temperature of heating water for heating is 85 degrees. If you put the temperature 50, the system is standing, the pressure is good. But it should work at any temperature, or not? If necessary, the length of the pipe 32m, diameter 16mm, polypropylene, radiators 40 sections of 0.16 liters, the towel dryer is about 3 liters. Tried to shut off the entire system, waiting about 6 hours, then opened. Result: Closed boiler shows a pressure of 1.6atm, after the opening of pipes inside the screed 1.5atm, after the opening of the radiators in turn dropped to 1.3atm, after the opening of the towel rail to 1.2atm. The expansion tank is half hot, the volume of 6 liters. The specialist from the gas service said that there is no water, although if you knock on it, you can hear that it is partially filled.

There’s no mention of the 1.8 atm pressure., Not in the instructions Coreastar. Procedure: stop the boiler, close the cocks of the heating system, drain the coolant from the boiler (through the safety valve, if there is no special tap). Check the unit for cracks and tightness of joints (by pumping air pressure up to 2.5 bar). Deflate the boiler (leave the valve open), in DHW set the pressure 0.8 bar-1 bar (check the tightness of the slide valve), close the valve, open the taps of the heating system, fill the system, remove air from the system, set excess pressure 1 bar-1.2 bar, start the unit, let it work 3-4 cycles at 60 C, stop it, release air from the system, set excess pressure 1 bar-1.2 bar, turn the unit. If there will be a drop in pressure (pressure falls, but not immediately, about 3.5-4 hours gas wall boiler holds pressure, then begins to lose with each cycle of heating, as a result of overnight pressure drops to zero), then the system leaks. To find it, you need to shut off the unit and drain the system, pump the air pressure of 5 bar. 6 bar and lime the joints. No need to flush 10 liters of water, it’s a pointless job. It may take a few days to remove air from the system.

Repair and adjustment of boilers Korea Star

Koreastar gas boiler malfunction. It switches on and off all the time (about every 10-15 seconds).). Tried different modes of operation (air temperature, heating medium), checked the filters, water pressure is normal. There was some kind of accident on the gas line the day before, maybe this malfunction has something to do with it. I need help in the form of advice. Yes, I have not said yet, it does not give any error. When there was an accident on the pipeline, there was an error. Now there is no error, but also does not want to work normally. It used to work fine on the DHW. And now it does not have time to heat water normally (shuts off after a few seconds). Check the gas pressure. A piece of transparent hose, about a centimeter in diameter, to fit tightly on the gas fitting. It’s about half a meter long. You pour water and put one end on the connector having previously unscrewed the screw. The difference of water levels in the tube, expressed in centimeters will be equal to the gas pressure in millibars. According to the documentation, the device is operational with a pressure of at least 4 mbar. Pay attention. if during the start up of the boiler observed an increase in water pressure in the system, and when fading back to the initial pressure. it is worth checking if the water filter (on the return) is not clogged. I had a similar situation. no error, ignition, burns 3-4 seconds., goes out. After 12-15 seconds the ignition goes on again and the boiler switches off. д. Round and round. It turned out that the main filter (cartridge) clogged with slime (I guess it was bacteria) and the water did not circulate. Changed the filter cartridge. everything is back to normal. In operation gas boiler Korea Star Premium. Interesting, this is the second time I see a malfunction associated with poor water circulation. I had a disturbance in the circulation of DHW, a disturbance in the circuit. There are sensors of both HTW and D.H.W. flow, why not assign an error code to circulation disorders and not output to the control panel, since both sensors are soon available? Let’s take my situation: the filter was clogged. Boiler turns on for a few seconds and then shuts down. DHW flow switch is intact, no shorts or interruptions in the circuit, the amount of water in the system is normal. There is no error here, in fact the device does not show any error. The sensor works and reacts to no circulation, shutting down the burner. That would be still some code to assign and display in this situation, so it was clear that the circulation is not. And the board perceives both the same, as a lack of signal from the sensor flow. If there is an insufficient amount of water in the system, let the pump operate normally, but the energy of the flow dynamics is not enough to raise the flag of the flow sensor. For this you need a full-fledged dense flow through the entire cross section of the pipe. If the signal that the sensor is triggered, appears immediately when you turn on the boiler, before the pump is running, it is perceived as a short circuit of the sensor. If the pump is stopped and the signal is still on, the same as a short circuit. But of course it is not always a short circuit. Sometimes the flag gets stuck in the operating state. Faulty boiler Koreastar. It works for some time (10-20 min.) and then switches off with error code 05. The temperature is set to maximum. That is, it is not turned off by the temperature. I.V. sensor has been replaced twice already. The wizard doesn’t know what’s wrong. He says we have to change the control board. Help, freezes, especially at night, I have to constantly get up and reset the error (reset button), it starts up again. There is also a wire from the sensor to the board, check or change it. The boiler Koreastar 24 is installed, all works 3.5 years. Now there is some crackling, as if boiled water in the kettle and it rattles from the heat. Even when the system is not working, the crackling is constant. No error, pressure is normal. What to do and can you continue to use? I think we need to wash the heat exchangers, both the main one inside and out, and the secondary one. If the boiler is two-circuit with a booster, which you can assemble yourself. Just ran into this problem myself yesterday. Washed the inside and cleaned the outside of the heat exchanger, ran it and it worked like new. The house (heated area of 220 m2) is warm and comfortable, my neighbor is now asking me to do the same with his appliance. So preventive maintenance should be done once a year before the heating season, time consuming 2 hours and the whole season without any problems. Installed and started the wall mounted boiler Korea Star 24, 4 months ago stopped working. After the breakdown, it was repaired. I don’t know what caused it, but they said the fuse blew (the unit wouldn’t turn on). I have hot water alternating between cold and hot, or after draining the water, about 50 liters, it starts to run hot. What is the problem?? The three-way valve is defective. Either clean it or replace it. The Korea Star boiler is malfunctioning. Everything was fine until yesterday: still warm outside, summer mode on, t. е. We only heat water! But began to notice that when you use hot water for a long time, heating warms up, and a lot. Batteries are boiling. I read somewhere that this is the three-way valve. Is it so and what to do about it? First I would like to know what material is made of your heating system? If cast iron and steel, you could try flushing the whole unit. Repairmen have such a service, as indiscriminate chemical flushing of boilers and heating systems. You can do it yourself. You can of course change the 3-way valve, but what’s the use if the system is dirty? Will not last long. I don’t know what kind of three-way valve he has. So far these units have not had to repair, but in most cases the flushing will help restore the operation of the 3-way valve, if it is still serviceable. At the same time clean the filter on the “return”. If you have one, of course. If not, be sure to put, thus prolong a little capacity of your unit. Can you tell me if it is possible to check the pump for serviceability?? Tube burst and water leaked into the pump port where the winding is. All dried, put it in. Coreastar boiler is trying to start, gets to the point of starting the pump, and it does not turn on! I think, what is the problem, or the board flooded that the pump and further ignition of the burner does not happen or the pump just does not turn on and cancellation occurs. No errors, the remote control only displays the water temperature and no further action. The new pump is expensive, is it realistic to check and is it possible to fix? Check the resistance preferably with an electronic multimeter, the operating resistance of 220 ohms, anything below, such as 195 ohms already says about the inoperability of the winding Well, the easiest way to connect the socket 220 V and if the pump starts, it works. Wall mounted boiler Koreastar in operation, how to leave only hot water without heating? Set the hot water priority. Close the 2 pipes under the boiler on the left side, they go to the radiators. Punctures the body of the boiler, as soon as I turn on the outlet, one of the fuses is lit, unscrewed the grounding on the body of the unit, everything works fine, advise how to find in general, where the short circuit may or the problem is something else? Opened the hot faucet, with the cold water faucet closed, the pressure does not drop, watched for about half an hour. Now this is not the main issue. Noises occurred during operation (water boiling) in the main heat exchanger. Decided to descale. Took it apart, cleaned it, put it back together. Has not passed and half a day, the boiler constantly works, even if you set the temperature of the water in the radiators (it gets the right temperature and more, but shut down and cooling off does not happen), there were sounds of dripping water on the burner. Thought condensate, as 1 degree outside, took off the nozzle from the burner, it was dry. So, the main heat exchanger is leaking, it means to replace? The water pressure did not drop (watched 3-4 hours, the faucet hot cold closed). And strange, it drips obscenely fast. Or maybe after cleaning the heat exchanger began to work so when I turn off the machine, there is no sound of dripping water, the pressure is normal. According to the gas pressure should be all normal, when disassembled, assembled and connected the boiler, showed a temperature of 19 degrees around the house, put 23. heated literally, for an hour at maximum, then lowered the fire and keeps 22 degrees constantly, without turning off. What are the possible error codes of gas boiler Korea Star? A complete list of codes is desirable. Fault A causes complete shutdown of the wall mounted Korea Star boiler, you need to restart it with the “RESET” button. F Faults cause temporary shutdown followed by automatic reconnection of the unit. Error A01. No flame signal. There are several possible causes of this malfunction: The burner does not receive gas. Shutoff valve may have been closed. A01 no flame signal Open all shut-off devices on the stack, restart the unit. Failure of ignition electrode, gas valve or control board. Fault A02. faulty flame signal. Cause: failure of ignition-ionisation electrode or control board. Fault A03. overheating of the boiler, the sensor on the overheat triggered at a temperature of 90C and blocks the unit. Wait until the unit cools down. Restart it. This error can also occur due to air in the system. In this case, bleed the air from the heating system. Another reason is insufficient water circulation in the heating system. Check the pressure in the heating system, open all stop valves. Make restart. Fault A08. incorrect operation of DHW overheating sensor. F05 error. malfunction of the smoke evacuation system. Cause: air pressure switch, fan defect or clogged pipes. In the latter case, the pipes must be cleaned. Error F10. breakage of NTC sensor of DHW temperature. Cause: short circuit or circuit breakage of internal combustion head temperature sensor. Restart the unit. F11 error. breakage of NTC sensor of DHW temperature. Cause: short circuit or open circuit of the DHW temperature sensor. If the burner does not light up only in DHW mode, you can continue to operate the boiler in heating mode. Error F37. Pressures in heating system drop below 80 kPa. Check the heating system for leaks, fix them if found. F41 error. insufficient circulation in the heating system, caused by air in the heating system or no circulation in the heating system. Bleed the air from the heating system and open all isolation valves that prevent the normal circulation of the heating fluid. Error F50. control board malfunction. There was an error and the boiler does not work. We have cleaned and flushed everything possible, all the tubes, valves. Still shows an error. Changed flow sensor and circulation pump. Now when you turn on the network, the screen shows the number 13, then turns on, making a little noise (set at a temperature of 25, in the room 12) and stops making sounds. The screen works, shows the actual temperature 12, but the heating does not turn on. Overnight somehow slept over, the batteries are cold. In the morning we got up, began to wash, DHW is running. After the DHW is used, the heating batteries began to heat. Stop using DHW. the batteries are getting cold. What can be the reason? And how to fix? You can put the three-way valve in the middle position, now both heating and DHW will heat at the same time. It is possible and will work so DHW, if the water withdrawal is small, but in frosts may not be enough for the system, and the boiler clock should be stronger. Better, of course, to change the valve. Used Korea Star Premium gas boiler, runs in the system for 3 years. This winter I noticed that the pressure began to rise, usually it was falling, and I was constantly adding water, although if the unit is at room temperature, the pressure is down, but if the temperature is on the battery, the pressure rises above 2, although the norm I had before was 1. What could it be?? Expansion tank. No air pressure. You need to pump. Trouble with the Koreastar ace boiler. The unit has been running for about six months. Recently started using hot water and noticed that after about 5 min. After closing the faucet, it shuts off (stops working for heating). There is no error message on the display, the temperature of the water in the heating system is lit. The boiler starts if you turn on the hot water again, after that it works without interruption until the next turn on the hot water and then turns off again. Т. е. Once you turn on the hot water. it turned off, the second time you turn on the hot water. it turned on, once again turned on the hot water. it turned off again, and so on. I repeat, it turns off after closing the hot water tap after 5 minutes. Do you know how to fix it?? Tried to switch to air temperature, did not help still turns off. About to drop below and turn on, tried it, waited an hour until it started to freeze, had to start the unit by turning on hot water. And then, let’s say the temperature of the heating system is in the control area, then why doesn’t it shut off after the next hot water turn on? The temperature of the heating system is now set to 43 degrees. So, after you turn off the hot water, the CO temperature is in the control area, it will drop lower and turn on, or switch by air temperature. The unit should turn on at set 43, at 33.2. It is better, of course, to take the remote control away from radiators and windows, set the temperature to 55-60 and switch by air temperature. When igniting the gas boiler Koreastar Premium, piezo spark crackles after ignition for another 15-20 seconds. Is this normal or can this be changed somehow? There is a double ignition, first the spark is fed without gas, if after that the boiler does not see the flame, then the spark is fed again with gas, or you have a spark is fed when there is a flame? There is a problem with the boiler Koreastar Ace 24 kV. Heating does not turn on the remote control and indicates that the switch to DHW, sometimes turned on the heating, but not for a long time. Doesn’t want to light the burner when turning on the DHW. Or turns on the DHW when the water is off and to some extent starts pumping water into the heating. In general it is not clear. The unit has been in operation for 4 years. Malfunction of Korea Star Premium boiler. The unit has been running for 3 years. About a month ago noticed that the lights in the house started flickering. I started to look into it and found the following: The unit at some point, for some of its needs, not related to the burner, is trying to run the fan, visually impeller twists and vibrates. This happens more often if the unit is left on for a long time, for example, when it gets warm. The motor housing itself is hot, I think 50 degrees. Presumably there is a large inrush current, which gives the voltage sag in the house. Otherwise works as usual, before ignition the fan turns on as usual and in the process of burning too. About 2 times a year a fan related error pops up. I connect it to the wind. Replacing the fan will help? Fans only assembled. Part number: PAFA4A07001_001, PAFA4B070_030, BH1112061A, 30005562C, PAFA4B070_029. The fan motor is only 45 watts. In operation Koreastar 24 wall mounted boiler. Worked fine up to this time, and then began to give an error. I started by method of elimination, namely, checked the resistance of coils on the shutoff 5,6, on the control 7,9. clack, work without sticking. Next, cleaned the electrodes, no breakdown visible on the ceramics, and checked the ignition transformer, but for some reason the primary winding shows a resistance of 0.06 ohms. Checked on a working unit, resistance is the same, then borrowed a new control unit. And then it runs for a while, maybe an hour or two, or after two cycles, it turns off and then turns on and gives an error. Gas is flowing, the meter turns, valves clang, but noticed that the discharge is very bad beats and then goes into error. I changed the ignition transformer, by the way before that was done as follows: Nuts leaked on the bimetal tightened, all leaks repaired, removed, cleaned, polished bleeder, began to bleed air well. The first battery was bled, blew air everywhere in the system, pumped air to one in the expansion tank (on an empty system with no pressure). So here and then after all this work (by the way, the spark was bad already on the new el. block, so I decided that the unit is not involved and put his native, with a new ignition transformer), it worked for a while and began to sharply increase the temperature on the screen somewhere around 75, fell to 51 at a set of 60. No errors, but also does not start until the system cools down. Checked before and the flow sensor, but just to be sure. Three-way valve switches excellent, the system water (according to the feeling of the hand) immediately goes hot, and heated the system well. Also when you turn on the DHW, the water runs hot. The filter is clean, there is no air in the system, the main heat exchanger is clean, cleaned the outside, washed, blows out fine. A clogged heat exchanger or filter, or poor circulation, or a three-way valve. So the boiler heats the DHW to a temperature above the control area, t. е. switch-off temperature. Then by thermal inertia dials a few degrees more. Now, until the unit cools to the inclusion temperature for the control area at a temperature selected by the user, it will not turn on. And it cools longer than the heating system, so that the radiators may already be cool, and the temperature sensor in the unit does not even think to give the command to turn on. You have it set to 60. This temperature is in the 60-69 C range. Т. е. If the boiler burner goes off, it won’t turn on until the temperature drops to 46-50 degrees. Set the temperature of heating DHW, Tov = 65. This heating temperature is in the range of selectable DHW temperature: 60-69C. This range will correspond to the following “control area”: Burner start temperature 65. 12 = 53C. Burner cut off temperature 65 6 = 71C. Т. е. at the set temperature of heating of the combustion head (Toh) equal to 65C, the actual temperature of heating of the combustion head (Toh) may vary in the range from 53(± 2)C to 71(± 2)C. If the HF becomes warmer than 71(± 2)C, then the unit will stop heating and will not start heating until the temperature sensor in it detects a temperature of 53(± 2) C on. Today we installed a gas boiler Korea Star 24. When installing in hot water mode hot water is not coming only warm, when the hot water priority mode, everything is normal. What is the problem?? Or is this the norm? Of course, this is normal. because in hot water priority mode, the boiler only switches to cooking hot water! And in normal mode, the heating is not turned off. Hence the warm water. Fault Koreastar boiler. Heating works fine, hot water is intermittent, when you turn on the hot water tap is first cold water, then boiling water. After a few seconds it is cool, then it is boiling again. What the problem may be? The three-way valve should be checked and if necessary replaced. The boiler Koreastar is installed in the system. Two years of use in the house. No complaints to the heating of CO and DHW, works economically and comfortably. But confused by the powerful double knocking in the system when adding pressure, as well as occasionally when using DHW. And also pops in the body of the appliance when igniting the gas. late ignition? How to fix it by your own forces? Adjust the gas valve. Adjust (from the manual) to the factory settings. Somebody tell me, I turn on the heating, the burner lights up and in 10 seconds, the boiler goes out and the water is turned on, the burner burns as it should not go out!? Remove the casing, remove the front panel of the combustion chamber, there are two ignition contacts facing each other and next to the flame sensor, which is responsible for the gas solenoid valve. In operating mode it is located in the vicinity of the burners and there is soot build up on it, it needs to be cleaned and I think the problem will disappear. Recently I ran into this myself, I cleaned the sensor and all is normal. Started to notice unusual readings on the remote control, and specifically the situation is. In the heating mode the boiler keeps the set temperature, I turn on the HWS, all is normal supports the set temperature and after turning off the HWS remote control water temperature in the heating circuit under 90 degrees and decreases to the set temperature. What could be the reason? No errors! I can not diagnose, opened the machine, there as it seemed to me at once the problem was in the three-way valve (unusual noise). I got it sorted, but the problem persists. That’s right. Showed the temperature of hot water, then switched to heating. This is a way to check the heat exchanger for clogging. On the DHW, for example, 40, then sharply close the tap, it should ideally show 55.

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