All the listed advantages of heating equipment of the Navien trademark enable users to receive the required amount of heat at low energy costs. Unique technical parameters also make it possible to use boilers in extreme conditions of water and gas supply.
The domestic market offers a large selection of products from the manufacturer Navien. At the same time, several design options can be distinguished among the model range:
Like any equipment, Navien gas boilers may become faulty sooner or later. This is most often due to improper installation and operation of devices, as well as the use of a low quality coolant.
So that the user, in the event of a malfunction, can immediately determine its cause and make a decision to eliminate the problem, navien boilers display an error code on the display. Here are examples of problems that most often occur when using such devices:
The abbreviation "ОВ" translates as heating system.
Of course, when this or that error code appears, you should immediately seek help from specialists who will eliminate it and advise on all operating issues. But some owners can independently identify this or that malfunction and bring their gas heating boiler into working order.
The most common cause of such a malfunction is a blockage or reduced flow in the heating system, as well as a breakdown of the circulation pump.
If a double-circuit boiler gives error 02, warm water flows from the hot tap for several seconds, and then cold water, the water temperature on the control panel rises sharply to a maximum, and then drops sharply. At the same time, everything is fine with heating.
Most likely, the problem arose due to an airlock in the hot water system. The water in the circuit heats up as expected, but after air enters the heat exchanger, the temperature rises sharply to a critical one, which results in error 02.
The problem is that the Navien double-circuit boiler, when hot water is turned on, makes a noise or hum, not like the noise from pumps. In this case, the pressure in the heating circuit according to the pressure gauge is more than 1.5, and the boiler does not give errors on the display.
Elimination - the described situation is quite common in gas boilers. It is associated, as a rule, with clogging of the heat exchanger due to poor-quality coolant. There are two ways out of this situation - dismantling the heat exchanger and cleaning it or replacing the heat exchanger.
011 is an error in filling the coolant. In the Navien boilers adapted for the Russian consumer, it is not provided, but is allowed only in those designed for the European market.
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The most advanced ideas and technologies are implemented in the products of the Navien brand. The products of this manufacturer are characterized by:
Reliability - the designs provide mechanisms that completely eliminate emergency situations.
Convenience - all information about the state of the system is constantly displayed on the LCD, and process management does not require skills.
Versatility - brand devices can be used both for heating the house and for hot water supply. And as fuel, you can use main and liquefied gas.
Safety - closed combustion chambers and the installation of a coaxial chimney guarantee the safe operation of the devices.
Navien gas boilers are today manufactured in factories in Japan and Korea. They are distinguished by high indicators of reliability and quality. But with improper operation or use of a low-quality coolant, errors may appear on the display, indicating the occurrence of a particular malfunction of the heating system and the boiler in particular. It is desirable that such problems be solved with the involvement of specialists who will immediately identify the cause of the error and eliminate it in the shortest possible time.
So that's exactly what he is looking for traction in this mode.
This pressure switch is so disgusting. reacts to the slightest changes in air flow
Poleznii , I don’t trust the hostesses in determining the “breakdown” of the boiler. it would be better to catch this moment yourself.
P.S. At the first launch of the first boiler (when they first appeared) there was the same problem. Changed EVERYTHING. When the boiler started working, they “sinned” on the pressure switch.After a while, this pressure switch was tested on another boiler - it worked without problems. But that first boiler has been working without problems for the fourth year already.
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Gas boilers from the Korean company Navien are distinguished by a high level of reliability. They are able to work for years without bothering users with breakdowns. This is confirmed by numerous reviews from users and heating engineers. But they are also characterized by breakdowns, since there is nothing ideal in nature. Let's see what error 03 is in Navien boilers, how to decipher other types of errors and which nodes to check when these errors occur.
Automatic self-diagnosis systems, in conjunction with protection systems, prevent serious breakdowns at a very early stage. Detecting any errors, the electronics turns off the equipment, displaying a code on indicators or LCD screens. In the absence of self-diagnostics, troubleshooting is a little difficult, but in general, the algorithm for checking internal nodes remains approximately the same.
Self-diagnosis facilitates the troubleshooting of gas equipment in Navien boilers equipped with electronics. It polls numerous sensors and nodes, analyzing the results and storing them in internal memory. Critical errors are immediately displayed on the indicators. Self-diagnosis systems were originally created for specialists. But having at least a little experience in repairing boilers and straight arms, nothing prevents you from repairing Navien equipment yourself.
In order for you to be able to repair Navien gas boilers on your own, we have compiled this guide. It will provide invaluable assistance in eliminating breakdowns and failures. Let's see what the self-diagnostic systems can tell us - we will present the error codes of the Navien boiler in the form of a list:
Despite the huge number of possible breakdowns, most of them do not pose a serious problem and are resolved rather quickly and with little means.
01E - overheating has occurred in the equipment, as evidenced by the temperature sensor;
02E - in Navien boilers, error 02 indicates an open circuit in the flow sensor circuit and a decrease in the level of the coolant in the circuit;
Error 03 in Navien boilers signals the absence of a flame signal. Moreover, the flame can burn;
04E - this code is the opposite of the previous one, as it indicates the presence of a flame in its absence, as well as a short circuit in the flame sensor circuit;
05E - the error occurs when the circuit for measuring the temperature of the coolant in the heating circuit is faulty;
06E - another temperature sensor breakdown code, indicating a short in its circuit;
07E - this error occurs when there is a malfunction of the temperature sensor circuit in the DHW circuit;
08E - error of the same sensor, but diagnosing a short circuit in its circuit;
09E - error 09 in Navien boilers indicates incorrect functioning of the fan;
10E - error 10 indicates problems with smoke exhaust;
12E - the flame in the burner has gone out;
13E - error 13 indicates a short circuit in the heating circuit flow sensor;
14E - code of lack of gas supply from the main;
15E is a rather ambiguous error indicating problems with the control board, but without specifying the faulty node;
16E - error 16 in Navien boilers occurs when the equipment overheats;
18E - malfunctions in the smoke exhaust system sensor (sensor overheating);
27E - the electronics registered errors in the air pressure sensor (APS).
There are no repair instructions included with the boilers, since a service company should be involved in the repair work. But nothing prevents us from repairing a faulty unit on our own, without resorting to the help of specialists. Let's see how the Navien boilers are repaired at home.
In order to prevent the appearance of scale, install a system for purifying and softening tap water - the costs will not be the greatest, but you will extend the life of your boiler.
First you need to clean the heat exchanger of the Navien gas boiler. At home, this is done with citric acid, toilet bowl cleaners, or special products (if available). We remove the heat exchanger, fill it with the selected composition, and then rinse it under high pressure of water.
A very complex error indicating some kind of malfunction or imperfection in the heating system. Try to correct the situation by adjusting the speed of the circulation pump, make sure that there is no airiness in the system. It is also necessary to check the filter and the heat exchanger lumen. In some cases, it may be necessary to replace the coolant.
For some reason, the electronics do not receive a signal about the presence of a flame. This may be due to a lack of gas supply or a malfunction of the flame sensor and its circuit. Sometimes the error appears after carrying out any work on the gas pipeline. Another possible reason is that the ignition does not work. Eliminating the error:
We check the availability of gas supply;
We check the efficiency of the ignition;
We check the ionization sensor (it could get dirty).
When using liquid gas, it is recommended to check the operation of the reducer.
Let's look at the typical malfunctions of this series, especially since there are not so many of them. For example, in the Navien Ace 24 K model, error 10 often occurs. This gas wall-mounted double-circuit boiler is built according to a scheme with a closed combustion chamber, so there are often problems with the removal of smoke. The most common cause of a malfunction is a fan breakdown - it will need to be replaced.
Error 02 occurs no less often. It is this error that can appear when the Navien boiler quickly picks up temperature and cools down quickly. The reason lies in the airing of the circuit or in the malfunction of the flow sensor. The heating system must be free of air - for example, by connecting it to the water supply and driving the coolant under pressure. In our reviews, we have already written how the heating mains are vented.
In order to avoid damage to the board, we strongly recommend installing a voltage stabilizer in the power circuit of the Navien boiler.
The most unpleasant mistake, as it is difficult to understand something here. It is designated by code 15E. It is almost impossible to figure out the device of the board on your own, without having a specialized education. Therefore, we recommend calling a specialist. He will test the electronic board for faults, localize the breakdown and fix it. How testing and repairs will be carried out, at home or in a service center, will be determined by a specialist.
Let's see how to repair the Navien mounted boiler with our own hands or bring the floor model to life. To do this, we will briefly go through the above error codes and identify the troubleshooting algorithms.
Do not panic, as the reason for the display of this code may be the banal airing of the system and filter. It is necessary to bleed air from pipes and batteries using standard recommendations. The next step is to check the integrity of the circulation pump. Make sure that it is spinning, and that its impeller is normally driving the coolant through it. Sometimes the error occurs due to physical damage to the impeller. Worst of all, if the circulation pump fails, in this case it will have to be rewound or even purchased a new model.
In order to avoid problems with the circulation pump, we recommend purchasing a suitable model from the Grundfos brand.
We have already spoken about a malfunction with code 02 - it manifests itself as a rapid rise in temperature, followed by a drop.We also figured out the code 03. If the self-diagnosis system has displayed error 04, it is necessary to check the condition of the flame sensor and its circuit. Make sure the sensor does not touch other metal parts. Sometimes the appearance of this code is associated with a malfunction of the system board, it will need to be repaired or replaced.
Most often, control boards are still changed, than they are repaired. If you have any doubts about its performance, contact a specialist.
Also check the condition of the connecting wires - they should not be shorted or broken. For diagnostics, use the most common ohmmeter.
Here we need to diagnose the water temperature sensor in the heating circuit. Find data on its standard parameters, make sure they are consistent (resistance to a certain temperature).
Double-circuit boilers give us warmth and hot water. They are equipped with two circuits and two sets of sensors. For example, there are two temperature sensors at once. One measures the temperature in the heating circuit, the other measures the temperature of the hot water. And the codes presented above indicate a breakdown of the temperature sensor of the DHW circuit or a malfunction in its circuit. Diagnostics and repairs are carried out in the same way as in the previous section - using an ohmmeter and visual inspection.
Before us are typical Navien Ice boiler trouble codes, indicating problems with the fan. It is necessary to check the integrity of its windings and ring their resistance, diagnose the presence of an interturn short circuit. A broken fan must be replaced with a new one. If the fan turns out to be intact, you should test the control board - do it yourself, if you have the appropriate knowledge, or call a specialist from the service center.
As for error 10, it indicates difficulties in the operation of the smoke exhaust system. The fan may be to blame here, you also need to check the length of the chimney and make sure it is passable - cleaning will be required. Often the culprit is the incorrect operation of the air pressure sensor. Worst of all, if the error appears as a result of constant failures in the Navien boiler board. The simplest wind blowing into the chimney cannot be ruled out.
This code is typical for Navien Ice and Navien Ice Coaxial boilers. It manifests itself in the event of a short circuit in the sensor circuit, and also indicates problems with its performance. The sensor must be tested and, if faulty, replaced. We also check the connecting wires. In rare cases, the control board is at fault.
This code appears when the heating equipment overheats. There can be many reasons for this:
One of the rarest reasons for this error is an increase in the gas supply level. Check this parameter and, if necessary, screw on the valve.
For some reason, the coolant has overheated;
There is not enough coolant in the circuit;
Malfunction of the control board;
Malfunction of the three-way valve;
The temperature control sensor in the DHW circuit has broken.
Check all components carefully and isolate the malfunction.
This code indicates overheating of the temperature sensor in the flue system. When it is triggered, the operation of the equipment is suspended. We check the patency of the chimney, check the sensor itself and the connecting circuits, make sure that there is no reverse draft. Incorrect operation of the control board is also possible, but this happens only in the most rare cases.
The last code in our review indicates a malfunction in the air pressure sensor circuit in the Navien Ice and Ice Coaxial models. We check all the connecting wires, change the sensor if necessary. As in all of the above cases, the appearance of a code is possible if the control board does not work correctly.
It may seem that the most unreliable node in Navien boilers, generating mountains of errors, is the control board. But this is far from the case - it breaks down quite rarely, while numerous sensors and wires break much more often. If you provide reliable protection for the electronics, your heating equipment will delight you with no breakdowns and a long service life. Study the errors of the Navien boiler and repair the faulty device with your own hands.
Repairing household equipment is costly. But it is not always necessary to call the master, in many cases you can do it on your own. Consider the instructions for repairing a gas boiler Navien.
Navien is a Korean-made heating equipment popular in Russia due to its good price / quality ratio.
These are the main design advantages of gas units:
the control unit is equipped with a microprocessor chip with a function to protect the automation from power surges;
automatic maintenance of the working mode, many settings;
long service life;
can operate on natural and liquefied gas;
the pressure drop of the coolant is allowed up to 0.1 bar without equipment failure;
the system does not freeze in the event of a gas interruption. In a normal situation, when the temperature drops to +5, the burner automatically turns on. If ignition is impossible, a forced circulation pump operates, this does not allow the coolant to freeze;
easy intuitive adjustment of modes.
Diagram of the device of the gas boiler Navien.
The power of Navien gas boilers varies in the range of 11-37 kilowatts. The range of the brand includes wall-mounted (what are wall-mounted gas boilers for heating a house), floor-standing (floor-standing gas boilers for heating a house), condensing models (what is a condensing boiler), with open and closed chambers, as well as diesel units. Wall-hung boilers are equipped with corrosion-resistant high-carbon stainless steel heat exchangers.
Malfunctions of the Navien boiler are registered by the automation. Each error has a code that is shown on the display. Let's analyze the most common ones.
01E. Overheat. It can happen due to a blockage (the passage channel is narrowed), or due to malfunctions of the circulation pump.
02. Low coolant level, damage to the measuring device. In the first case, the system is aired. 02 may also indicate a breakdown of the pump impeller, a closed position of the control valve, or a malfunction of the flow sensor.
03E. Burner problems: no flame signal (types of gas burners for heating boilers). The error appears if there is no gas supply, the ignition does not work, the gas valve is closed, the ionization sensor does not work, and also if there is no proper grounding.
04E - a false signal about the presence of fire or a short circuit in the sensor circuit.
05E-08E. Broken circuit in the coolant temperature meter. Possible damage to the contact between the sensor and the controller or a short circuit in this area.
10E - smoke. This also happens due to fan problems (or poor contact of the sensor with the fan). The reason may also be a blockage of the chimney or wind in the chimney (how to make a chimney for a gas boiler correctly).
12E - the fire in the combustion chamber has gone out.
13E - short circuit in the flow meter.
14E - gas supply is interrupted.
15E - problems with the control board.
17E - DIP switch malfunction.
18E - overheating of the smoke exhaust device.
27E - air pressure sensor problems.
If the boiler makes noise during operation, and the error is not displayed on the display, the reason may be in scale, which impedes the flow of the coolant. The boiler makes noise when overheating, boiling water, or when the quality of the coolant is poor.
A frequent malfunction of a gas double-circuit wall-mounted boiler Navien is a failure of a three-way crane (what are wall-mounted double-circuit gas boilers for heating a house). This occurs, in particular, when the crane has reached the end of its service life (usually 4 years). In this case, hot water may disappear in the DHW circuit.
Consider how to eliminate the main malfunctions of a gas boiler. In case of error 01, you need to carefully inspect the pump, check the condition of the impeller, the electrical unit, clean the dirt filter, and also purge the air from the system.
To eliminate error 02 of the Navien boiler, perform the following actions:
bleed air from the system;
measure pressure;
check the resistance on the pump coil, make sure there is no short circuit;
check the position of the control valve, open if closed;
clean the sensor flag.
Error 03 of the Navien boiler is often displayed if the flame sensor is clogged. It should be cleaned. The gray coating on the electrode is cleaned off with fine-grain sandpaper. When an error 5 appears, you need to check the condition of the circuit section between the sensor and the controller, in case of serious malfunctions, replace the sensor. :
check the fan for serviceability, replace if repair is impossible;
check the contacts in the tubes of the measuring device;
clean the chimney.
When error 13 appears, replace the sensor. The noise in the system can disappear after flushing the heat exchanger, sometimes it needs to be replaced. The taps should be opened completely; it is recommended to lower the temperature of the coolant.
Another important point in servicing the Navien gas boiler is how to fill the system again after draining. Such a need may arise after the repair / replacement of parts of the system or if the coolant was drained while the house was empty.
Before starting refueling, you need to de-energize the devices, turn off the gas. Check the position of valves, shut-off and distribution valves, open them to the maximum. Turn the make-up valve (usually at the bottom of the unit) to the left. Close when the pressure gauge shows 1.2-2 bar. If, as a result of filling, the alarm indicator is triggered, the water is drained and everything is done again.
Do-it-yourself repair of the Navien hinged boiler in many cases is possible and acceptable. In order to maximize the uptime of the unit, the manufacturer's instructions must be strictly followed during the installation and operation of the heating system.
For preventive purposes, it is advisable to supplement the system with several devices: a gas and water filter, a water converter (magnetic, polyphosphate). To protect sensitive electronics, it is recommended to connect the boiler through a voltage stabilizer (what are voltage stabilizers for heating boilers).
Video about disassembling the Navien boiler and cleaning the heat exchanger.
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The Navien Delux is a revised model that replaces the Navien Ace. Navien Delux Coaxial series of boilers with two heat exchangers from 10 to 30 kW with a closed combustion chamber and forced smoke extraction using a turbine. The manufacturer notes the following features of Navien Delux:
Frost protection system. Unlike boilers from other manufacturers, in addition to automatically turning on the burner when the temperature drops below 6 degrees, at temperatures below 10 degrees, the boiler provides continuous movement of the coolant, activating the circulation pump.
Variable speed fan. In Navien Delux boilers, a turbine is installed with a variable speed of rotation of the blades, depending on the readings of a special air pressure sensor. Thus, the optimal ratio of the gas-air mixture is ensured and the boiler productivity is increased.
The heat exchanger is made of stainless steel. Due to the use of a fan with a variable speed of rotation and an increase in combustion efficiency, it became possible to replace the copper heat exchanger with a stainless steel heat exchanger, which certainly has a significantly longer service life.
It is also noted that boilers are protected from the influence of mains voltage drops by a special protective chip and the ability to operate at low (up to 4 mbar) pressure of the main gas and water. In other words, the manufacturer tried to make a product that is maximally adapted to the worst operating conditions.
The word Coaxial in the name of the boiler means the use of coaxial flues (pipe in pipe). Such a system is convenient in that only one pipe is used to supply air to the combustion chamber and exhaust the exhaust gases, which can be removed from the room to the street by the shortest route. In general, the boiler does not fundamentally differ from products of other brands. You can note the convenient location of the expansion tank and the non-standard location of the fan - it is located below the burner.
It is noteworthy that Navien boilers do not have a built-in control panel. All adjustments are made using a separate control panel. Also, the remote control is equipped with a temperature sensor and displays various information about the status of the equipment and will report a malfunction with an error code. A special feature of Navien is the presence of an air pressure sensor, which not only performs the thrust check function, but also sends data to the control unit for portion control and determines the presence of reverse thrust. If there is excessive pressure in the chimney, for example, due to the blowing of wind, the gas supply to the burner will be interrupted and the boiler will stop.
In the lower part of the boiler there are inlets and outlets of the heating and hot water circuits, a make-up valve, a drain plug, a cleaning filter and a safety relief valve for overpressure.
The principles of operation of modern gas boilers are practically the same for all manufacturers, the differences are only in the equipment configuration and the internal arrangement of the actuators. The diagram of the movement of water in the boiler is shown in the figures. The Navien boiler works either to maintain the desired temperature in CO, when heated water from the first heat exchanger is pumped by a circulation pump in a large circle, or in the DHW preparation mode. The DHW mode has a priority, which means that, if water heating is required, a special three-way valve switches the circulation to the DHW plate heat exchanger, and the flow of the coolant along the heating circuit is shut off. The signal to switch the boiler to the DHW heating mode comes from the flow sensor located on the waterworks with a make-up valve.
A gas boiler is a constructively simple device, but to ensure safe operation, any such units are equipped with protective automation, which serves to prevent serious accidents in the event of errors in operation. Almost all physical processes occurring during the operation of the unit are controlled by various sensors, information from which is sent to the control unit and is continuously processed.
For the convenience of diagnosing and troubleshooting, information is provided to the user on the display of the control panel in the form of codes by which it is possible to determine in which specific system a malfunction has occurred and what checks can be carried out to eliminate it. Next, we will look at the most common errors of Navien boilers in more detail.
Error 02 is caused by the heating circuit flow sensor located at the outlet of the main heat exchanger. If nothing interferes with the movement of water in the CO circuit, after turning on the pump, the sensor contacts are closed and the signal is registered by the control unit, otherwise, the control panel display error 02 .
The following main reasons can be distinguished:
low pressure in the heating system (to control the pressure, Navien boilers are equipped with a dial gauge located on the front cover - you need to check and, if necessary, recharge the system to a value of 1.2-1.5 bar)
breakdown of the flow sensor (to check, measure the resistance of the sensor before and after turning on the pump)
no circulation in the heating circuit
defective control board
The lack of circulation means that for some reason the coolant cannot move normally through the heating pipes.Obstacles can be: clogged cleaning filters, freezing of the pipeline section, closed taps around the perimeter of the heating system, the presence of an air lock, or pump malfunctions.
To remove air, you can try to start the boiler in a special test mode, after opening the air vent valve on the pump. To activate the test mode, it is necessary to turn off the boiler and turn the switch # 1 on the DIP-Switch block of the board to the ON position. We will talk in more detail about checking the actuators in a separate article.
We recommend watching a video in which one of the users simulates error 02 on the Navien boiler:
VIDEO
In gas boilers, the presence of a flame on the burner is checked by a special sensor - an ionization electrode. The logic of the unit operation is to continuously check for the presence of a flame after opening the gas valve. Symptoms of the appearance of error 03 on navien boilers can be conditionally divided into two groups:
unsuccessful attempts to ignite (no flame appears)
ignition occurs, but the flame goes out
In the case when ignition does not occur, you need to check:
gas pressure at the inlet and outlet of the gas valve (can only be carried out by a qualified specialist using special equipment - a differential pressure gauge)
the condition of the ignition electrodes (compliance of the gap with the manufacturer's standard, contamination of the electrodes). The norm of the distance between the electrodes is 3.5-4.5 mm.
the integrity of the insulation of the electrode power wire (visually, you can make sure that the spark breakdown occurs precisely on the body of the gas burner, and not anywhere else)
correct setting of the boiler output on the DIP-switch (valid if there is a problem during the first start-up of the boiler or after replacing the electronic board)
presence of voltage on the ignition transformer
Error 03 on the Navien boiler, it will also appear in case of unstable combustion (intermittent flame) or if the control unit cannot detect the presence of a flame. In this case, it is necessary to make sure that the connection of the ionization electrode to the control board is secure, check the boiler grounding and the absence of contamination on the electrode. Combustion instability can be caused by an even increase in the fan speed, therefore it is necessary to make sure that the yellow hose from the turbine to the APS sensor is securely connected and not damaged.
If during the checks it was not possible to normalize the operation of the boiler, it is more likely that the boiler board will need to be diagnosed, repaired or replaced. We recommend watching a video in which one of the users simulates error 03 on the Navien boiler:
VIDEO
This error is associated with the smoke exhaust system of the gas boiler. The combustion products must be removed without fail; for this, a fan is provided in the boilers. To control the operation of the fan and determine the presence of an admissible draft for the operation of the boiler, a differential relay is used, which is connected to the turbine with two plastic pipes. When the fan is running, a vacuum is created, the relay closes and the boiler functions normally.
The reasons errors 10 there may be a blockage of the chimney, the presence of a reverse draft or an incorrect connection of the air pressure control sensor to the fan. For the latter case, it is necessary to check that the yellow tube is connected to the lower part of the fan, and the transparent one - to the upper part, and the tubes themselves do not have any damage, deformation or condensation inside.
Increased resistance in the chimney can occur due to direct gusts of wind or blockage of the chimney (bird nest or cobwebs, in winter - frosting). That's right, the place where the chimney is taken out should take into account the direction of the winds of a particular region even at the design stage and the chimney should not be brought out to the leeward side of the house.
Video (click to play).
We stopped at the most frequent failures in the operation of navien boilers, but in fact there are much more error codes. Testing and troubleshooting methods are a topic for a separate article. For convenience, we present a summary table of codes with a brief description:
To understand how to eliminate a particular malfunction in the gas unit, you need to know the causes of the malfunctions:
