What is the problem with the Daewoo gas boiler if it produces error code E5?

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Published: 07/17/2019

Reading time: 7 min

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2016

The Daewoo boiler is produced by a South Korean company that began producing boilers in 1967; the literal translation of the brand is “Great Universe”. Today the concern includes a large group of companies and its own research centers.

Their merits include a number of innovative technologies, for example, an electronic adapted MICOM burner ignition system, a boiler remote control with a temperature sensor, an LCD indicator, a two-way pump for Daewoo boilers, a high-performance ball switch system, which made it possible to abandon the outdated technology of the last century - three-way valve

Modernization of the internal system of the boiler installation, in particular with regard to the stability of the hot water supply system, has led to the fact that the water is heated evenly and has a stable temperature, regardless of simultaneously open points. The positive thing is that the system works at almost any pressure in tap water.

A big breakthrough in matters of reliable and long-term operation was the introduction of a self-diagnostic system into the programming system for boiler operating processes. It periodically tests the operation of the equipment and displays identified problems on a remote control unit with a digital display.

Daewoo produces atmospheric and turbocharged boilers, supplying its products to a dozen and a half countries, with fairly reasonable prices in the price-quality ratio from 20,000 to 60,000 rubles and with good interchangeability of boiler equipment elements.

• 1 Review of the best models
• 2 Heating boiler error codes

Operation and setup

Boilers are adjusted during manufacturing, in the factory. Additional setup is a small adjustment made during installation and first run.

The operating limits of temperature and pressure of gas and working fluids are determined. These actions must be performed by specialists from the warranty workshop, otherwise the warranty agreement will be void.

After the first launch, no special actions are required from the owner. Adjusting the temperature to your liking is done as a matter of routine.

It is necessary to invite a specialist once a year to carry out maintenance.

If problems occur, you should immediately invite a technician from the service center.

Turbocharged boilers DEU

The main advantage of DEU turbocharged gas boilers is that they do not require a separate boiler room. Their dimensions are very modest (length/width/height - 290x490x626 mm), which allows you to hide the heater in a wall kitchen cabinet. Due to its low weight (only 26 kg), the boiler can be hung on any wall, even plasterboard. The mount is included. Also, each model is equipped with a remote control - you can make adjustments to the operation of the boiler remotely.

Characteristics

Turbocharged boilers DEU are designed for heating and hot water systems, that is, double-circuit. Their power is 11.6 or 15.1 kW, which is quite enough for a house with an area of ​​116 and 151 square meters. m, respectively. They can only work if connected to the mains power supply. Natural or liquefied gas is suitable as fuel. The efficiency is 91%, which is quite good.

Main technical characteristics:

• maximum pressure for heating – 3 atmospheres, for hot water supply – 7 atmospheres;
• energy consumption at 110 W/hour;
• the maximum temperature for heating is 85 degrees, for hot water supply – 60 degrees.

With a temperature delta (the difference between the initial and final temperatures) of 25 degrees, the boiler is capable of producing 10.7 liters of hot water per minute. If the temperature delta is 40 degrees, then the amount of water for hot water supply is reduced to 6.7 liters, which is not so much compared to heaters from other manufacturers (see Don boilers). For heating, you can set the coolant temperature in the range of 40-84 degrees, for hot water - 35-60 degrees.

Principle of operation

The peculiarity of DEU turbocharged gas boilers is that their combustion chamber is sealed. This is precisely what determines the operating principle of the units in this line. A coaxial chimney is connected to the combustion chamber. This is a universal pipe that performs two functions at once:

• removes gas combustion products;
• supplies oxygen to the flame (no oxygen - no fire).

The movement of gases in a coaxial chimney is only possible thanks to a fan installed above the combustion chamber. There is no classic draft, as in conventional chimneys. The coaxial pipe also allows you to slightly increase the efficiency of the boiler.

When smoke exits through the coaxial chimney along the internal circuit, it gives up part of its temperature to the supply air. If cold air from the street enters the combustion chamber already warm, then there is no need to waste precious joules of energy heating it. The result is maximum efficiency and reduced costs.

Types of Daewoo gas boilers

Turbocharged boilers

The Daewoo boiler is small in size, can be mounted in a kitchen cabinet, and requires an electrical connection.
The device can be located in any room. The device is quite light, about 26 kg, so it does not create excessive load on the wall. It is often placed in a suspended state in the kitchen. Since the boiler is small in size, a separate room is not required for it; even a kitchen cabinet is quite suitable for placement.

Advantages of a turbocharged boiler:

• compactness;
• light weight;
• the necessary fastenings are included in the kit;
• remote control available;
• Efficiency – 91%;
• economical fuel consumption.

The Daewoo boiler must be connected to electricity. This can be considered its main drawback. The device contains a coaxial chimney through which oxygen necessary for gas combustion is supplied and harmful substances are removed. Closed firebox.

Coaxial chimney in turbocharged boilers
Technical features:

• pressure – 3 atmospheres for heating, 7 – for hot water supply;
• electricity consumption – 0.1 kW per hour;
• power – 11.6 or 15.1 kW;
• the highest water temperature for heating is 85, for hot water supply – 60.

The specifics of devices may differ depending on a particular model.

Atmospheric boilers

The Deo atmospheric boiler has an open burner type. When installing it, it is important to comply with gas equipment safety regulations. The mounted unit is installed in a separate boiler room; the room must be appropriately equipped. Basic requirements: forced ventilation, sufficient room size, ceiling height.

Open burner in an atmospheric boiler

Advantages of atmospheric units:

• safety;
• long service life;
• simple device;
• silent operation;
• breakdowns are observed less frequently than with turbocharged engines;
• independent of electricity;
• heating a large area - up to 200 m2.

The disadvantages of a Daewoo atmospheric gas boiler include the mandatory presence of a chimney and a constant flow of fresh air.

The technical characteristics of a Daewoo atmospheric boiler do not differ from those of a turbocharged type. Only their power can vary - from 12.8 to 23.3 kW.

Dual-circuit

A boiler with a heating circuit and domestic hot water
produces models with two circuits. They heat water evenly, have heat exchangers independent from each other, and are easy to install and maintain. The design of these devices has the following features:

• the first circuit is made of copper;
• the second is lamellar;
• heat exchangers have an independent device;
• heating of water does not depend on the number of water intake points and pressure;
• convenient control.

The process of creating boilers is controlled at every stage. The products comply with international quality standards.

Review of the best models

The most popular model from the line of this brand among Russian buyers is the Daewoo DGB 100 MCF boiler.

Main technical characteristics:

1. Operating power is 10 kW, enough to heat an individual residential building with an area of ​​up to 100 m2.
2. A closed combustion chamber with a turbine flue gas removal system prevents carbon monoxide from escaping into the boiler room.
3. Ignition of the boiler with an electronic igniter, which not only starts the Daewoo boiler into operation, but also controls the quality of the combustion process during operation. Electronic burner control takes part in the automation and safety control system, as well as adjusting the operation of the boiler depending on the outside air temperature and the set coolant parameters.
4. To increase the durability of boiler equipment, the pipe system of heat exchangers of Daewoo boilers is made of copper.
5. The network circuit is equipped with a built-in forced circulation system, which allows you to work with low gas pressure in the main line or low pressure of tap water.
6. The computerized control unit allows you to configure basic parameters and integrates well into the Smart Home system.
7. Cost, 29900 rub.

The next standard size is the energy-independent condensing boiler Daewoo DGB 160, which provides a high level of heat supply to individual houses of increased area.

Technical data:

1. Maximum heating load -18.8 kW.
2. The maximum load in hot water heating mode is 23.3 kW.
3. The maximum heated area of ​​the heating facility is 160 m².
4. Boiler efficiency in operating mode, efficiency - 90.3%.
5. The number of circuits is two.
6. The combustion chamber is closed.

The interesting atmospheric wall-mounted model DGB 200 MCF provides heat and hot water to thermal objects with a heating area of ​​up to 110 m2.

Technical data:

1. The system is open, double-circuit for heating and hot water supply.
2. Low noise, small-sized weighing 33 kg.
3. The heat exchanger is made of copper.
4. Efficiency – 92.0%.
5. Power - 23.3 kW.
6. Heating area – 186 m2.
7. Cost - 34,590 rubles.

Since the unit has an open firebox and operates with natural circulation, it is installed in a separate room with an internal air temperature above +7 C, otherwise the boiler will only operate for self-heating.

Operating principle of the Daewoo DGB 200 MCF condensing boiler:

1. Electronic ignition of the gas injector.
2. When gas is burned, its hydrogen content turns into water vapor. The condensing device of the boiler is capable of turning the generated steam into liquid, while extracting additional heat and increasing the efficiency of the steam power cycle.
3. The infrared sensor of the unit controls the combustion process in the furnace, establishing optimal combustion conditions in the fuel-air ratio based on the color of the flame, which leads to significant gas savings. The system operates on two types of fuel: natural and liquefied gas.
4. Water is supplied by a circulation pump to two heating circuits: heating and domestic hot water, where it is heated and supplied to consumers.
5. The control panel controls the operating mode of the boiler unit. The shut-off valve turns off the gas supply to the heating boilers; when emergency values ​​for the temperature and pressure of the coolant are reached, the process is accompanied by an audible alarm, while the operating parameters are preserved.
6. The diagnostic system will display an error code on the screen so that maintenance personnel can take measures to eliminate the operating failure.

The model range of this type of units is completed by the Daewoo 400 boiler, which is no different in operating principle from the previous boiler, but is capable of heating 500 m2 of area and has a unique combustion automatic system made in Japan “EN-US”, the cost of the model is 53,200 rubles.

Daewoo gas boiler series

Daewoo is one of the most famous Korean conglomerates, which ceased to exist in 1999. Many divisions of the concern gained independence or merged into the structure of other companies.

Now in South Korea there are two companies that were previously related to the corporation and produce gas boilers:

• Altoen Daewoo Co., Ltd (until 2021 - Daewoo Gasboiler Co., Ltd). Now production facilities are located in Dongtan.
• Daewoo Electronics Co., which produces gas equipment at the factories of the KD Navien company.

Components for boilers from both companies are manufactured in South Korea and Japan, and assembly is carried out automatically.

The following lines of gas boilers from Altoen Daewoo Co. are presented in Russia. Ltd:

• DGB MCF. Boilers with an open combustion chamber.
• DGB MSC. Boilers with a closed combustion chamber.
• DGB MES. Condensing type boilers with a closed combustion chamber. Models in this line have a weekly operation programmer, an autonomous control panel, and simplified chimney connection.

All models of the listed lines are wall-mounted, double-circuit, that is, designed for heating and hot water supply.

Daewoo Electronics Co. There are two lines of gas boilers: wall-mounted “DWB” and floor-mounted “KDB”. They have their own characteristics, including error codes that differ from competitor models. However, these boilers are not widely used in Russia.

Therefore, this article will only provide error codes for gas boilers from Altoen Daewoo Co., Ltd.

Heating boiler error codes

Daewoo gas boilers are rightly recognized by users as highly reliable and ready for use in Russian municipal conditions.

In order for the service life to be as long as possible, the owner will be required to strictly follow production instructions and routine maintenance. Maintenance work should be carried out in the summer, long before the start of the heating season, so that there is enough time to correct any identified faults.

Daewoo boiler error codes

Error E0 - Problem with the room temperature sensor. The temperature sensor has failed or its connection has broken. Temperature sensor in the control panel. Replace the damaged part with a working one. Error E1 - Reduced pressure in the heating system. The coolant is low pressure or has leaked. Leakage of the Daewoo boiler or heating system. The causes of the leak must be eliminated. Fill the system and restore pressure. Error E2 - Gas does not burn completely. Blockage in the chimney or air duct. Diagnose the condition of the chimney or air duct. Error E3 - The coolant is overheating. The coolant does not circulate well. Carry out diagnostics to ensure that the direct and return taps are open, inspect the dirt filter and circulation pump. Error E4 - Chimney clogged. Check the condition of the chimney. Error E5 - Abnormal operation of the flame sensor. Malfunction of the IR sensor or electronic board. Check the serviceability of the IR sensor and electronic board. Replace the faulty unit. Error E6 - Gas leak (if there is a gas leak sensor). Gas leak or sensor malfunction. Gas connections tightness, gas valve, gas leak sensor. Observing safety rules, eliminate the identified causes, replace the faulty unit. Error E7 - Communication error with the control panel. Contact broken, remote control faulty. Check the connection of the remote control and the serviceability of the remote control. Eliminate identified causes. Error E8 - Coolant temperature sensor failure. Power failure, temperature sensor failure. Check the presence of supply voltage, the serviceability of the sensor and the electronic board. Eliminate identified causes. Error E9 - Malfunction associated with a leak in the heating system. Error 4U1 - The control panel buttons are stuck. Error U0 - It is recommended to restart the device. Error EF - The water flow switch has been exceeded for more than 90 minutes. Error EA - Indicates that the heating system is filled with water more than 5 times in 1 minute. EC error - Incorrect selection of boiler model. Error code EE - Fan stops working. The power supply is damaged, the fan, capacitor or speed sensor is faulty. Carry out diagnostics of electrical voltage, functionality of the motor, capacitor, speed sensor and electronic board. Error code Ed - A current frequency deviation has occurred. Error code U8 - Damaged DHW temperature sensor (hot water supply). Error code U9 - The chimney is clogged or the chimney temperature sensor is damaged. Malfunctions and adjustments The Daewoo Gasboiler DGB 160 MSC does not heat the water to the set temperature. The water heats up to 34 degrees and the burner turns off. Water pressure is good. Tell me, what could be the matter? You need to check the gas inlet pressure. It is also possible that the secondary heat exchanger is clogged or the gas valve is incorrectly adjusted. Boiler 100 MSC and remote control DBR-W21. When you turn on the hot water tap, the gas burner does not start, and the remote control lights up and goes out again several times. What could be the reason? There may be several options: 1) the control unit is faulty, 2) the remote room thermostat is faulty. I have a gas boiler Daewoo Gasboiler 130, yesterday the burner ignition stopped working - and it does not work for either hot water or heating, there were no problems before. What is the reason? There can be many reasons: 1) the ignition electrodes do not work, 2) the gas valve is faulty, 3) a leak from the primary heat exchanger, etc. Problems started with the Daewoo DGB-250 MSC - 29 kW boiler. The pressure gauge is round. Remote control DBR-D21. The unit starts to work and water begins to flow from the water filter, both below and above. It drips, then flows, then stops, and after a while it starts dumping again until the pressure drops to zero. Then it gets up and throws an error. After adding water it starts working. The pressure in the expansion tank is 0.8 - 1 atm. Most likely, the auto-air valve or the gasket under the auto-air valve needs to be replaced. I have a DGB 300 msc boiler, it gave an E3 error. After this, the service center repaired the circulation pump (replacing bearings, impellers and covers), and also cleaned the heat exchangers and filters and the unit itself from scale and soot. We repaired it and turned it on, the water pressure in the system is maintained, there are no gas leaks. The device turns on, the flame lights up in the chamber for 10 seconds, and after 5-10 seconds hot water flows, after which it turns off and displays error E3. During operation, the body of the DHW heat exchanger is cold. On the control panel: The DHW temperature mode is set to 54C; when turned on, the temperature rises from 0 to 41 and displays error E3. Most likely, the three-way valve is faulty or the secondary heat exchanger (DHW) is clogged. I have a Daewoo 100 wall-mounted boiler, which is in its third season. It worked normally, but now it does not produce the set temperature (set to 50 degrees), it reaches 48-49 and the unit suddenly turns off and the temperature creeps up to 80-85. Then the pump turns on, the temperature drops within a few minutes and everything goes in a circle again, they cleaned the heat exchanger, replaced the temperature sensor and everything is useless. What to do? You may have poor circulation in your heating system. The filters on the heating system need to be cleaned. Error EE, fan does not start. Model DGB-300. Most likely the fan is faulty. Most likely the fan needs to be replaced. Malfunction of the Daewoo Gas Boiler 160 boiler. When turning the filling valve of the device, water does not flow. What could be the reason? Perhaps the boiler feed tap itself is faulty or there is no water at the inlet of the feed tap. Gas boiler DGB-100 MSC. When it starts, normal ignition occurs; The red indicator on the remote control lights up. After this, the fan speed begins to increase, sometimes until the flame goes out. If it does not go out, then after some time the fan speed will increase (as if the chamber is being purged before ignition), then the speed will return to normal. After stopping due to the flame failure, the unit automatically starts up again. If gas adjustment is needed, then explain how to do it. Most likely, your fan or control unit is faulty. Gas tuning won't help you. Malfunction of the Deo 100 boiler. After a year of operation, it began to display error E2 - a malfunction in the smoke exhaust. The chimney is clean. The error appears once every two to three minutes, then the flame lights up again. What is this and how to deal with it? We recommend checking the primary heat exchanger for clogging factors. If everything is fine with the chimney and heat exchanger, then the supply and exhaust ventilation is not working well. We recommend checking the height of the chimney to see if there is any air leakage (the chimney from the boiler is not inserted tightly), there is no air flow (perhaps the windows and doors are hermetically sealed), or the ventilation duct is not working. I have a wall-mounted boiler Daewoo-130. The problem is that at the given DHW temperature it is 50 degrees. The device continues to heat water up to 90 degrees, and does not respond to the set temperature. The technician came and changed the temperature sensor, but the problem persisted. What is the reason? There may be several reasons: 1) the secondary heat exchanger is clogged, 2) there is a small flow of water through the secondary heat exchanger, 3) the control unit is faulty, 4) the control unit is not adjusted for gas pressure. In 2013 I became the owner of a Daewoo Gasboiler DGB-100 MSC. Less than a year later, all sorts of problems began to emerge. We had to replace the primary heat exchanger, and then the secondary heat exchanger also failed. The problems did not end there; the pressure in the system began to increase. And now, once again, the pressure, like a car’s speedometer, either drops to 0 or goes off scale. Perhaps you have not carried out commissioning work during which gas pressure adjustment is made. If these measures are not taken, the primary heat exchanger will fail. Failure of the secondary heat exchanger indicates that the temperature is too high or the water quality is not up to standard. Adjustments are definitely necessary, because... Salt deposition occurs when the device operates at high temperatures. You may have a faulty expansion tank (due to lack of maintenance) or no additional expansion tank on your heating system. All requirements are written in great detail in the passport. If you comply with all the requirements written in the passport, there will be no problems with it. DGB-350 MSC - when power is applied, error U8 and a sound signal appear. The resistance of the temperature sensor is about 70 kOhm at 16 degrees. What resistance range is acceptable for this sensor? Error code U8 – temperature sensor malfunction. The average resistance value at 20 degrees is 50 kOhm. The Deo gas boiler writes error E1 and does not heat the water, although the pressure is visually very strong. The heating does not start. What to do? Error code E1 - no water in the boiler. It needs to be nourished. Model Daewoo DGB 130. It worked flawlessly for 7 years, after which the pump broke, it was replaced and now it doesn’t stop - it works constantly. What can be done? It is necessary to turn the unit on and off several times on the control unit, in different modes (continuous, timer mode) by rotating the right knob. The blocking mode should disappear. Malfunction of the Daewoo 100 boiler. How can I go to the submenu to set the pump to work only together with the burner? You need to press buttons 1,3,7 on the remote control (1 - button to turn on the heating, 3 - button to switch the mode by coolant or room temperature, 7 - increase the “triangle” parameter) simultaneously. Set mode P0 – standard factory setting mode; within the range of the heater operating time set on the timer, when the burner is turned off, the pump also turns off. The DGB wall-mounted boiler worked fine for six months, then it lights up three times and the U0 error pops up. I replaced the flame sensor, worked for three hours and again U0. What to do, what is the reason? Error code U0 – the flame sensor does not detect combustion. It is necessary to make sure that there are no objects blocking the flame sensor; the mica window must be in its place in front of the sensor. It is also possible that the flame height is very small and the sensor does not see it (you need to add the amount of gas using the regulator located on the control unit). Boiler Daewoo Gasboiler DGB-160, error code E8 on the room remote control. Error code E8 - malfunction of the temperature sensor in the heating system. It is necessary to check the connection to the control unit and, if necessary, replace the temperature sensor in the heating system. Writes error E1, but the point is that the pressure rises in the device, i.e. Before this it worked at this pressure, but now it doesn’t even turn on. It has been in operation for 6 years now. Could it be the pump? Most likely, the pressure gauge on the device is faulty. Model DGB-160. The make-up is constantly open, if you turn it off. The pressure at the sensor immediately rises. It sounds like there is only water in the expansion tank, no air. We assume that the expansion tank is not working, what could be the reason? It is necessary to pump up the expansion tank to 1-1.2 atm. (into an empty expansion tank without water). You also need to pump up the additional expansion tank on the heating system (if there is no additional expansion tank, you need to install it). We have a Daewoo 160 gas wall-mounted boiler. The problem is this: when hot water is turned on, the pressure indicator on the device drops, the pressure in the expansion tank is normal, the tank is new. Tell me what to do? The supply valve may be open. Heating water flows into hot water. It is necessary to close the feed tap. Daewoo dgb 160, the three-way valve periodically sticks. What could be wrong with him? Most likely, the three-way valve needs to be replaced. But before that, we recommend checking the supply voltage. We have a problem with the 300 msc boiler, it systematically overheats. Error E3 appears. There are many possible reasons: 1) the circulation pump is faulty, 2) the system is air-filled, 3) the filter in front of the circulation pump is dirty, etc. When you turn on the hot water, the unit begins to vibrate and after some time displays error E4. Everything is fine with the chimney, they checked it. How to eliminate vibration and this error? Most likely, the main heat exchanger and fan (if the model is turbocharged) need to be cleaned. The fan may also need to be replaced. Wall-mounted boiler DGB 250. How to replace gas with liquefied gas in the board? Have the injectors (15 pcs.) been changed, and is it necessary to change the flame height? You need to switch the dip switches to LPG mode. The gas valve also needs to be reconfigured. What should be the pressure in the expansion tank dgb 200? The pressure in the expansion tank should be approximately 1.0 bar, provided that the pressure in the system is maintained at least 1.2 bar. Daewoo boiler. Error E2 pops up all the time, before that it worked fine, after 3 months it started to turn off on its own with error E2, it would work for a minute and turn off, it would turn on and turn off again. What is the problem? Error code E2 – no draft in the chimney. The chimney may be narrowed or clogged. The main heat exchanger may also be clogged. Gas boiler Daewoo 350, in operation for two years. Recently, periodically (once a month) when the DHW is turned on, error E3 comes on. Heating is turned off. After rebooting from the remote control everything works fine. What could be the problem? Error code E3 – poor coolant circulation. There may be a malfunction in the circulation pump, or the filters or secondary heat exchanger may be clogged. Such a problem: Boiler Daewoo Gasboiler DGB-160 MSC. A couple of days ago the pressure began to drop and I noticed a leak from the strainer. I decided to remove the lid and see where the water was coming from. So, water runs out of the water filter. Tell me what can be done manually, or is it better to call a professional? It is necessary to determine the exact location of the leak. It is likely that the auto-air valve is clogged and, as a result, it is leaking. It is necessary to either flush the auto-air valve or replace it with a similar one. For easier access, you can remove the fan while replacing the valve. The work is not very difficult, you can do it yourself. I have a DGB 250 boiler, it works 2-3 days a week. I arrive at the dacha, turn on the hot water and heating, hot water comes out immediately, the heating turns on within 1-2 hours. Why is that? The heating starts immediately after the appliance is started. If you experience a delay, it means that the timer mode is turned on. You need to make a setup. Boiler Daewoo Gas boiler 200. How to remove the filter in front of the circulation pump? You need to pull out the fixing bracket and remove the filter element. Model 100 MSC. When you turn on the hot water, the pressure drops sharply, the pressure sensor starts flashing on the display and the heating tap heats up. Pumping water does not help; when you turn it on again, everything repeats. What is the reason? There may be several reasons: 1) the make-up valve is faulty - needs to be replaced, 2) the secondary heat exchanger is clogged - flushing or replacement is necessary, 3) the three-way valve is faulty - replacement is necessary. Deo boiler. When you turn on the hot water, the heating turns on (set to summer mode). What to do? How to fix the error? It is necessary to check the functionality of the three-way valve. If the heating is insignificant, you can leave it as is, since there is a bypass hole in the valve. This is necessary for the operation of the unit. I have a 160 msc boiler. When working on heating, the pressure in the system constantly drops and it turns off, no leaks have been detected anywhere. There may be a problem with the expansion tank. Maintenance may also be required. We recommend calling a specialist.

Price range

The cost of Daewoo gas boilers is in the conventional range of 34-59 thousand rubles. The price difference depends on the model, power and other factors.

If the region is located far from large populated areas, the price of the boiler will increase due to logistics costs. Before purchasing, you should find out in what configuration the equipment is supplied and what needs to be purchased in addition for optimal and safe operation of the boiler.

In addition, you need to take care of concluding a warranty agreement, which will also cost a certain amount.

IMPORTANT! Some users do without warranty service, but this approach is only possible for specialists who can independently repair and configure the boiler. For mass users, it is strongly recommended to use the services of warranty workshops.

Errors and methods for eliminating them

The number of automatically detected faults in Daewoo boilers is grouped into 19 events, each of which has its own code. Seeing the display, you can try to solve the problem yourself or give called technicians a first idea of ​​the problem that has arisen.

Some malfunctions of gas boilers do not depend on the type of combustion chamber or other features of the equipment. And there are problems that are typical only for a certain line. Daewoo Altoen (Gasboiler) boilers have continuous numbering of errors, and the methods for eliminating them are almost the same for all models.

Error type “E0”

This code indicates an error in the room temperature sensor, which is built into the control panel. The example of this malfunction shows that it is not every time that you need to call a repair team.

It is necessary to disassemble the device, clean the contacts and check the sensor using a tester. If necessary, it must be replaced. If you do not have the skills to disassemble and repair such products, then you can take the remote control to any workshop specializing in electronics.

Error type “E1”

A decrease in pressure in the heating system was recorded. The simplest case that leads to this problem is a breakdown of the minimum pressure switch or a lack of signal between the sensor and the control board. However, first of all, you need to immediately check the heating circuit for leaks.

Gas boilers from Daewoo

The Korean industrial giant Daewoo is known throughout the world primarily for its cars. However, the product range is much wider and includes many different positions and directions.

The company name Daewoo is translated into Russian as “Great Universe”. It was founded in 1967, and the first gas boiler left the assembly shop in 1988. Today the company is a corporation of global importance, which includes many branches and related companies.

Active research and development is underway, resulting in the emergence of new designs, components and parts.

For example, the electronic ignition system was first implemented on Daewoo gas boilers.

The range of heating boilers produced by the company is quite wide. All the most promising designs are produced that can ensure stable and trouble-free operation for a long time.

The company's goal is to produce relatively inexpensive, but very reliable units. This is achieved by excluding minor or low-demand components that increase the price of equipment without bringing noticeable benefits.

In addition, more efficient and inexpensive models of important components have been developed - for example, a new type of three-way valve that is more reliable and easier to manufacture.

A feature of Daewoo boilers is their relatively low power, designed for use in small private homes. This approach demonstrates a focus on the mass consumer, and it produces positive results.

For example, it was possible to reduce fuel consumption by 7-10% by reducing the number of gas burner sections.

Advantages and disadvantages

The advantages of boilers include:

• High efficiency of units.
• Reliability, durability of boilers.
• Resistance to external influences.
• The ability to independently identify problems and notify the owner about them.
• Together with space heating, hot water is supplied.
• Low fuel consumption, which does not affect the performance of the units.

The disadvantages of Daewoo boilers are considered to be:

• Energy dependence. If there is a power failure, the system will stop operating.
• Sensitivity to water quality, stable supply voltage, requiring the use of additional equipment.
• Some users report increased noise levels when heating water.

Most of the disadvantages can be attributed to the general features of gas boilers.

Basic error codes

e1

Error e1 indicates that there is insufficient coolant in the heating system. To resolve this, first check to see if the water supply is blocked. Next, we look at the serviceability of the main board, cold water pipes and pressure switch. It is also possible that the cause of the device malfunction is the failure of the manual water fill valve.

e2

Error e2 means incomplete combustion of gas in the heating boiler. The reason is poor draft due to clogged chimney or air duct pipes. They should be inspected and cleaned.

e3

Error e3 shows the "Boiling" signal. The device generates an error if the water supplied for heating has a temperature above 98 degrees for five seconds or more.

Circulation pump for Daewoo boilers

The problem may be in the pump, the main electronic circuit board, or the temperature sensor. If necessary, the sensor is replaced with a new copy. Dirt filters are inspected and cleaned.

e4

Error e4 means that the exhaust gas output control sensor has tripped. The draft force is measured and the chimney is inspected for blockages.

e5

Error e5 is displayed when the ignition voltage is excessively high. It is necessary to check the functionality of the printed circuit board. Using a voltmeter, you need to measure the voltage between the contacts of the infrared sensor CN05, it should be equal to 5 volts. If necessary, the sensor is replaced.

e7

Error e7 appears when there is a communication error if contact between the boiler and the control panel is interrupted for more than 1 minute. The communication connections in the room console are checked, if they are working, they look for a breakdown in the control board and determine what to do next.

EU

The ec error indicates that the power of the DIP switches is set incorrectly. Set the correct combination by checking it with the table located next to them. Also, the cause may be unstable voltage in the electrical network. In this case, it is recommended to install an additional stabilizer.

Stabilizer for gas boilers

u0

Error u0 (uo) means that the flame control sensor does not see it. It is necessary to increase the flame level in the burner or replace the control sensor with a working one.

Heating boiler error codes

The equipment was working properly, but suddenly stopped and showed an error code on the display? Don't worry, it might be a system glitch. Restart the boiler. If after turning it on again the same code is displayed, start troubleshooting.

Other faults

During operation of a Daewoo boiler, error codes cannot always help with malfunctions.

The following problems may occur:

• The room remote control power buttons do not work when the power cord is connected. You should measure the voltage at the signal end of the remote control and at the blue CN terminals. It should be equal to 12 volts. The solution is to replace the defective controls and configure the terminal unit.
• If overheating is detected, check whether the circulation pump is working correctly, check the pressure in the heating pipe and the cleanliness of the distribution pipe.
• If a pump failure occurs during testing, the mains voltage is measured between the two black-and-white and white-black terminals on the CN pump
• When ignition does not occur, the locking condition and operation of the control panel are inspected. The operation of the main board is also checked. Diagnostic points for this are indicated in a special table in the operating instructions.

The main advantages of DAEWOO boilers:

Cost-effective - a modulation fan burner is used with the function of automatic smooth regulation of gas combustion in proportion to its pressure; this device is protected by 9 patents. Thanks to this, the boiler can operate at a low gas pressure of 3 mbar, and throughout the entire range of changes in boiler power (from 23 to 100%) a constant ratio of the components of the fuel-air mixture is ensured. This type of adjustment reduces gas consumption in DAEWOO boilers by 15-18%, increases the service life of the heat exchanger and automation components. With different gas supplies, the boiler power automatically changes, which ensures phenomenal efficiency, with an efficiency of 92-94%.

Environmental friendliness - As a result of almost complete combustion of gas, a high boiler efficiency of 92-94% and a very low content of toxic emissions are ensured, which eliminates the formation of soot on the walls of the heat exchanger and carbon deposits on the nozzles. The boiler is completely sealed and removes all exhaust gases to the outside. The residual gas detection system eliminates unnecessary fuel consumption. Even after a year or more of use there are no traces of soot on the injectors.

A circulation pump with a magnetic coupling in which the pump starts smoothly without pressure surges and at a low noise level. Dry rotor. Operates using magnetic induction. The pump impeller is driven by electromagnetic force. For the first time in the world, a magnetic coupling was used to transmit torque from an electric motor to the impeller. This technical solution made it possible to eliminate the need for a common shaft and has the following advantages: there are no oil seals; contact between the electric motor and the coolant is excluded (as with pumps with a “wet” rotor); jamming is excluded; operating noise is kept to a minimum; pump performance is 20% higher than that of wet rotor pumps; characterized by high reliability.

Fan. The fan drive uses a DC electric motor, which makes it possible to improve the control of its rotation speeds. Located under the burner.

Infrared flame sensor - monitors everything that happens in the combustion chamber. The infrared sensor not only detects the presence of gas combustion in the burner, but also determines the quality of its combustion by the color of the flame.

Modern digital remote boiler control panel with LCD indicator (backlit). There are two types of remote controls - push-button and with manual controls, which is convenient, for example, for elderly people.

The air temperature sensor is built into the remote control panel of the boiler. There is an additional boiler operating mode – “Heating based on room air temperature”. The built-in electronic daily timer allows you to program the operation of the boiler.

Adaptability to harsh operating conditions. The boiler operates stably at reduced gas pressure (up to 3 millibars) and water. DAEWOO boilers have stable operation and excellent boiler characteristics in terms of liquefied gas consumption. By changing the type of nozzles, you can simply reconfigure the boiler to work with liquefied gas. When changing the type of gas, no additional pressure adjustment is required, because it is carried out automatically by a gas valve. The standby mode of operation of the boiler allows you to maintain the minimum required temperature when there are no people in the room, and also allows you to save gas consumption and protect the heating system from freezing in winter. DAEWOO boilers use a multi-level boiler control and safety system.

Self-diagnosis of the boiler operation - error codes are displayed on the control panel. The boiler memory stores information about the last 10 errors.

Operating principle of Daewoo gas boilers

Air masses enter the boiler through a special air duct. There is a built-in fan inside that operates at high speed to ventilate the chamber where the fuel burns. Then the speed of revolutions decreases, the valve opens, gas is supplied to the chamber, where it is mixed with air. High voltage is applied to the electrodes and the gas ignites. This is detected by an infrared sensor, which sends a signal to the control board. The entire process is controlled by the system.

The Daewoo gas boiler operates smoothly, the power is adjusted automatically. When burned, the gas heats a copper heat exchanger, which transfers heat to the coolant. Uniform temperature distribution is achieved through the operation of a circulation pump. The boiler is completely sealed, its combustion products are discharged outside through the chimney.