Have you ever seen household appliances that have been working for many years without failure? We are sure not. Refrigerators, air conditioners, microwave ovens require periodic attention...
Moreover, you should not be upset if you need to repair your Neva gas water heater. After all, it can be done quickly, and there will be no problems with spare parts. Our article explains exactly how to identify and fix faults.
We will introduce the design features of Neva brand equipment used in heating water for hygienic and sanitary consumption. The useful information we provide will help you accurately find the cause of the breakdown. Following our advice, you can easily restore the column’s functionality.
The column does not turn on.
The main reasons for the lack of flame in a gas appliance may be lack of traction, low water pressure, or dead batteries:
- To improve draft in the ventilation system, you will have to completely clean the passages of the ventilation duct, which becomes clogged with combustion products, debris and dust. This is easy to do by removing the pipe and providing direct access to the channel. Upon completion of the work, the junction of the pipe and the wall must be covered with putty to prevent gas leakage.
- Batteries can be replaced with one touch. Open the battery compartment and insert new batteries according to the diagram. For long-term use, lithium batteries are better. Alkaline analogues have a lower emitter
bone and require frequent replacement. It is noteworthy that a lit display on the device does not always indicate a full charge. - To eliminate the problem of low water pressure, you will need to flush the filters in the water supply system. A membrane is installed on the water unit, replacing which allows you to increase the amount of water supplied. The membrane of the water unit is the most vulnerable point of the system. The rubber part may stretch, crack or tear. It is recommended to have a spare part for emergency use.
- If the thermostat malfunctions, the column does not recognize the difference between water flows and does not turn on. To eliminate the problem, just adjust the temperature on the regulator.
Error L0
Low gas consumption for stable operation. The most common error with the neva Lux device
- Low water flow less than 3.5 liters per second. Increase water pressure. Clean the heat exchanger pipes from any scale that has formed. For this purpose, special means are purchased to combat limestone deposits. There is a budget option using citric acid or vinegar.
- The set water heating temperature is not sufficiently higher than the intake water temperature. Increase temperature difference.
- High gas pressure in the system. Install the reduction gearbox.
The burner goes out immediately after starting.
Among the reasons why the fire goes out, a few seconds after ignition, the following should be highlighted:
- The ionization sensor is broken. In this case, you need to clean the electrode from the soot layer or straighten the sensor nose as shown in the video. Often the part simply fails, so a complete replacement of the element will be required.
- Opening the electrical circuit. As a result of frequent lack of draft in the chimney, the temperature sensor overheats and the electrical circuit opens or the membrane stretches. The problem can be solved by cleaning the vent and repairing the electronics (if necessary).
- The temperature sensor settings are incorrect. If a small amount of water is consumed at the set maximum of 90 degrees, the overheating sensor will trip and stop the gas supply. To resolve the problem, adjust the temperature device settings.
Most common faults
The following problems when using a water heater indicate malfunctions of certain components:
- the burner does not light;
- the burner does not go out;
- the column turns off spontaneously;
- insufficient water heating;
- overheating of water.
Let's look at what this looks like in practice. You turn on the faucet in the kitchen or bathroom, expecting hot water to come out. But contrary to expectations, the burner does not light. Another situation: the column starts to work normally, but soon turns off, although you did not turn off the water tap.
They wanted to wash their hands and almost got burned because boiling water was running from the tap. Or, on the contrary: you are about to take a shower, but the water is barely warm. A very unpleasant moment: you turn off the water, but the burner continues to burn.
The problems listed above can have completely different causes. Sometimes they lie on the surface, as is the case with dead batteries. But often you have to perform one complex operation after another to get to the bottom of it.
Older models, such as Neva-3802, use manually controlled piezo ignition; to start it you need to press two buttons simultaneously
The work of home craftsmen is made difficult by the lack of experience, professional tools and a thorough understanding of the principles of operation of a gas water heater. Therefore, when starting diagnostics and repairs, it is worth weighing all the pros and cons, guided by the principle “do no harm.”
Problems due to lack of power supply
Neva water heaters are fueled by gas, but they cannot operate without electricity. The control unit, glow plug, solenoid valve and other components of the device require a stable power supply. It is powered by two LR20 alkaline batteries, located in a separate, easily accessible compartment.
For uninterrupted operation of a gas water heater with electric ignition, it is advisable to have at least two LR20 or CR20 batteries in stock
If there is no electricity, when you turn on the water tap, the spark discharge will not occur or will be weak and the column will not turn on.
Lack of power supply can be caused by discharged batteries, oxidation of the battery compartment contacts, or a break in the electrical circuit.
If the batteries are not completely discharged, they can power the display, but they will not have enough power for more energy-intensive operations. Therefore, if you see that the display is working normally and displaying temperature data, still clean the contacts of the battery compartment and replace the batteries with new similar ones or lithium CR20.
The battery compartment is located at the bottom of the device and is accessible without removing the casing; when installing batteries, be sure to observe the polarity
The battery compartment cover is located at the bottom of the case and is accessible without disassembling the device. That is, you can clean the contacts and replace the batteries yourself. Eliminating the causes of underheating of water.
If the column still does not turn on with new batteries, you need to check for scale in the heat exchanger pipes.
The formation of scale on the internal surfaces of the pipe prevents the normal passage of water, which can lead to the column turning off. Also, a thick deposit of magnesium and calcium salts significantly reduces thermal conductivity; the device cannot provide the heating capacity stated in the accompanying documentation, which leads to insufficient heating of the water.
To remove scale, use regular citric acid diluted with warm water, the amount of solution should correspond to the volume of the heat exchanger, you can also use table vinegar
Let us remind you that the operating instructions indicate that it is necessary to clean the gas water heater and its heat exchanger every 12 months. When the column is used intensively and hard water is used, scale forms faster, so extraordinary cleaning may be required.
To do this, you will need to remove the casing and remove the heat exchanger. Before disassembling, close the taps on the gas and water inlet pipes. Remove the gas and water adjustment knobs by pulling them towards you. Some models have screws under the handles that can be removed with a screwdriver. Also unscrew the screws that secure the casing to the bracket from below on both sides.
The wires connecting the water temperature sensor and the control unit with the display are disconnected. Remove the casing by pulling it towards you and sliding it up. Looking ahead, we note that after repair, installation of the casing is performed in the reverse order.
So, the casing has been removed and now it is necessary to remove the heat exchanger. Unscrew the plug located under the water unit and drain the remaining water from the heat exchanger. Disconnect the column pipes from the cold and hot water pipes, remove the old gaskets. Unscrew the two screws and remove the metal plate securing the heat exchanger at the top.
Remove the heat exchanger and place it in a container with a hot solution of dishwashing detergent or regular laundry soap. After 15 minutes, use a soft brush to remove soot from the grill and other surfaces. Rinse the grill and other surfaces under a strong stream of water.
To remove scale from pipes, prepare a warm solution of citric acid at the rate of 100 grams per 1 liter of water heated to 40°C. The resulting solution is poured into the heat exchanger pipe and drained after 15 minutes. The pipe is washed with water. If necessary, repeat the procedure.
When installing the heat exchanger in place, the detachable connections are sealed with new gaskets. Do not overtighten the connections so as not to crush the gasket. Otherwise, its compressed edge may end up in the pipe in the path of water flow, which will cause unpleasant noises. Installing skewed gaskets will lead to similar consequences.
Damage to the gas-water unit
If power is provided, the heat exchanger is clean, but the water heater does not turn on, you will have to disassemble the gas-water unit to determine the condition of the membrane and rod.
The sequence of dismantling the gas-water unit of the column, indicating detachable connections that require sealing with elastic gaskets to avoid water leaks. The steps are listed in alphabetical order
Let us repeat that during repair work the gas and water supply taps must be closed. The water unit is dismantled together with the gas unit.
The gas and water supplies are turned off, the nut of the heat exchanger pipe is unscrewed, the wires connecting the solenoid valve to the control unit and the microswitch wires are disconnected.
Unscrew the screws connecting the gas-water unit and the burner manifold pipe. Now this assembly can be removed and placed on the table for further disassembly.
After unscrewing several screws, the gas block is separated from the water block and set aside. Then they work only with the water block. Unscrew the screws located around the perimeter. The block is divided into two parts, between which the membrane is located.
The membrane is removed and inspected. Most often, it is because of its stretching or breakthroughs that it is not possible to turn on the column. During reassembly, the new membrane is placed in the standard socket. The rod is installed in such a way as to ensure its translational movement without jamming.
When does a solenoid valve need to be replaced?
If the solenoid valve fails, gas does not enter the system and the column does not turn on. The valve is removed from the device, but is not disconnected from the control unit.
By simulating the supply of water to the system by moving the microswitch pusher, the ability of the valve to retract and hold the rod is determined, opening the passage of gas to the burner. If the valve does not work, replace it. To do this, disconnect the wires, remove the water-gas unit, unscrew the fastening screws, remove the old valve and install a new one in its place.
Incorrect burner operation
Displacement of the spark plug electrode or the formation of carbon deposits on it leads to the absence or weakening of the ignition spark and, as a result, to the failure of the column to turn on. Also, due to problems with the spark plug electrode, an increase in gas concentration in the combustion chamber is possible. For this reason, ignition is accompanied by a loud bang.
The arrows point to the most problematic areas of the water heater burner, including spark plug electrodes that require cleaning from soot, as well as electrical wire connectors
It is enough to clean the electrode with sandpaper and return it to its normal place so that the spark “works” and the extraneous noise disappears.
When the burner becomes clogged, its flame weakens and begins to smoke. As a result, the water does not heat up to the intended temperature. Before cleaning, remove the burner by disconnecting the wires of the ionization sensor and spark plug, unscrew the manifold pipe nut and two screws, remove the manifold, unscrew two more screws and disconnect the burner block.
Use a brush to clean the surfaces of the parts. Use a brush of a suitable size to clean the internal channels. After removing the dust, wash the parts with dishwashing detergent, rinse and, after drying, put them back in place. The flame of a clean, working burner is blue.
Sensors and electrical circuit or why the burner goes out
As was said in the chapter about the design of the water heater, the security system includes three sensors that are connected in series into a single electrical circuit.
It is enough for one of them to fail to open the electrical circuit and turn off the column.
The ionization sensor installed on the burner, as well as the glow plug, is equipped with an electrode that can become dirty or change its position, and then not “see” the flame. With such a malfunction, the water heater starts working normally, but after a few minutes the burner goes out because the solenoid valve shuts off the gas.
When disassembling the burner, it is necessary to unscrew the screws securing the clamping plate, which holds the flame sensor and spark plugs
Cleaning the flame sensor electrode is also done with sandpaper, after which it is installed in such a way as to “see” the flame.
The gas water heater with the Neva logo also goes out due to an improperly equipped chimney or its clogging. If the draft is poor, the removal of combustion products becomes impossible. To prevent the accumulation of harmful substances in the room, the corresponding sensor is triggered and the column turns off.
When the water temperature reaches 90 degrees, the overheating sensor reacts and the column immediately stops working. The reason usually lies in incorrect adjustment of the gas and water supply, or in insufficient pressure in the water supply network.
The model range includes devices operating on liquefied gas. The gas cylinder is connected to the water heater through a reducer, which can also cause malfunctions
Sometimes it is enough to turn the gas control knob towards the minimum or increase the water flow so that the dispenser stops turning off. You also need to set the “winter/summer” knob to the appropriate position in time.
The functionality of the gas water heater sensors and the integrity of the electrical circuit are checked using a multimeter. If the sensors are working properly, the electrical resistance is close to zero. A breakdown of the overheating sensor is also indicated by an error code - the letters “EE” are displayed on the display instead of the usual water temperature indicators.
If there is no device for measuring resistance, testing is carried out by installing jumpers to close the circuit and turn on the column. If the column works normally with this connection, it means that the sensor being tested is faulty and needs to be replaced.
It must be remembered that installing jumpers is only a diagnostic method, and not a repair method. It is prohibited to use a column with jumpers instead of sensors.
Noises when turned on.
The presence of third-party sounds when the heating device is turned on and operating indicates a malfunction. Typically, the problem is dead batteries, a clogged jet or clogged vents. Eliminating the causes of failure in the first two cases is relatively simple. Replacing the batteries and cleaning the jet can save the situation. In the case of clogged ventilation shafts, you may have to contact utility services, since the blockage may be in a place that is inaccessible for cleaning.
Model features
Let us highlight a number of advantages that this speaker can please a potential buyer:
- Compact and ergonomic. The dimensions of the unit are very modest and amount to 565x290x221 mm. At the same time, the entire design is maintained in accordance with the best ergonomic standards - a convenient control panel and minimalistic design are characteristic features of the model.
- High performance. The design of the NEVA 4511 geyser took into account the fact that the equipment will work primarily in the difficult conditions of the Russian climate. Because of this, it was made to be hardy, strong, durable and highly productive. In addition, model 4511 is adapted to work in conditions of low pressure in the water supply system, which can be considered an important plus for users in our country, where interruptions of this kind occur quite often.
- Safety and reliability. The unit is equipped with a flame control sensor, which reduces the risk of an unexpected accident hundreds of times.
Poor quality of water heating.
Remember that the columns of the Neva 4511 model are designed to heat 11 liters of water per minute. If your needs exceed this figure, then you should replace the gas appliance with a more powerful one. If the column does not cope with its assigned function for other reasons, then you will have to inspect the supply valve and clean any clogged areas. If the pressure is low or the thermostat malfunctions, the column will physically not be able to heat the required volume of water. You can try to solve the problems by adjusting the faucet. In particularly difficult cases, it is better to contact the services of a service center employee or a gas office.
Error E3
The solenoid valves turn on before the signal coming from the sensor that controls the water flow.
- Solenoid valves are broken. Cannot be repaired, must be replaced with new ones.
- The electronics control unit is broken. Replacement with a new one is carried out only by specialists.
Neva Lux 6014 (bottom view)
Subtleties of work when repairing gas equipment
Before starting repair work, be sure to turn off the gas supply valve. When cleaning the vent, lay down old newspapers and open the windows. Periodically check the tightness of the rubber gaskets located inside the gas appliance.
Periodically monitor the condition of the heating device, promptly replace spare parts and periodically adjust the temperature sensor settings.
Important! It is better to entrust complex repair work to a professional. Gas equipment requires a careful and thorough approach. A random mistake can cost the lives of many people.
We recommend reading on the topic:
- Malfunctions and methods for eliminating them in the Astra geyser
- Gas water heater malfunctions Vector and ways to eliminate them
- How to replace a gas water heater with your own hands?
- How to clean a gas water heater yourself?
Error E7
Ignition of the main burner fails 7 times in a row (it lights up and goes out after a few seconds).
Possible causes of the malfunction:
- Insufficient gas pressure. The remedy is to check whether the gas shut-off valve is fully open. If the valve is open, contact your gas service.
- The flame sensor is located away from the main burner fire. For proper operation of the device, it is necessary to place the sensor in the burner fire zone.
- Malfunction of solenoid valves. Requires replacement by a service technician.
- Boiling of the rod of the units, water or gas. Needs replacement.
- Soot accumulation on the flame sensor electrode. Clean with a wire brush.
Prevention measures
For successful, safe and long-term operation of Neva speakers, you must adhere to the manufacturer’s instructions, as well as a number of simple rules, among which the most important point is the timely replacement of filters.
Note! In addition, the chamber should be cleaned and the igniters inspected from time to time.
Problems that can be prevented, namely problems with clogged heat exchanger tubes, as well as membrane wear, can be solved by installing additional water filters at the inlet.
If you identify any difficulties or questions in the operation and setup of geysers, it is advisable to immediately contact qualified technicians who will quickly and accurately diagnose the breakdown and set up the device.
Problem with poor air flow
The problem is usually associated with a clogged exhaust outlet for combustion products; soot may accumulate on them; there may also be a fault in the draft sensor. It is necessary to clean the combustion chamber and combustion product collector. The problem also be your chimney.
Pay attention! At home, it is possible to clean only the visible part of the chimney; specialists should clean the remaining part of the chimney. To check the air flow, you can use a lit match; to do this, you need to bring it to the window on the panel. When the flame deviates, you can come to the conclusion that there is an air flow.
Reviews and advice
When operating a speaker, sometimes people encounter other problems.
Victor installed alkaline batteries on the Neva 4510 column, but they “fly out” every 2-3 weeks, although the column only works for a year.
Viktor Matskalov installed the Neva 5514 column in place of the old one, which had been working for 12 years. When the batteries are replaced with new ones, it lights up, but then 3-4 clicks follow and the column goes out.
Oleg is very pleased with his semi-automatic speaker. There is only one problem: it is very difficult to change and install batteries.
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Advice: in order for the column to work longer and not break down, it is recommended to turn on cold water during its operation only as a last resort. Also, do not leave hot water in the radiator. It is better to drain it immediately, otherwise the radiator will quickly become clogged with scale.
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