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Wall-mounted models Nobby Smart. Condensing Smart Condens. Floor standing Sigma, Kobold. Solid fuel Elegant, Vulkan. Malfunctions and error codes. Description and characteristics.

Mora's Cauldron - Error Codes and Their Meanings

Possible breakdowns of Mora Top gas boilers, which are visible on the display

Error E0- The device is blocked. There is no gas supply. The burner is not active. The pump is turned off. The internal elements of the control and regulation unit are broken. Needs replacement.

Error E1- The boiler is blocked. The switches do not close. Due to this, gas is not supplied, the burner is inactive, and the pump is turned off. Small amount of water in the heating system. The filter may be clogged. It needs to be cleaned. Small amount of water in the heating system. Pump failure. Needs replacement. There is not enough water in the heating system. The pump, instead of the recommended 2nd or 3rd stage, is installed on the first. Expose correct mode. Also, error code E1 may appear in the following cases: Presence of air pockets. It is necessary to pump water so that the recommended pressure value is established in the system. When switching heating and hot water modes, bleed off excess air. Reboot the unit.
Problems with the axis of the flow switch, it is either inactive or completely motionless. It is necessary to disassemble the switch box from the flow sensor housing. Try to free the jammed axle. If this does not work by turning the boiler on and off, push it with your finger. The gap between the axle and the drive arm and the switch is too large. The position must be set correctly
plastic arm for transmitting motion. The switch is broken. Needs replacement. The electrical connection between the switch and the control and regulation unit is broken. The chain needs to be restored. Check the wires.

Error E2- Mora's boiler was stopped due to an accident. The gas supply is interrupted. After the flame is turned off, the device tries to start again. The pump does not turn off while the device is trying to start working. Then he gets up. The flame went out because there was no gas supply. Click the Reset button. Due to the fact that the burner is very dirty, the gas supply is difficult. In this case, partial combustion of the flame can be observed. The gas supply port needs to be cleaned. The electrode is broken or the electrical connection line is damaged. Make a replacement. The ignition transformer is broken or the electrical connections are damaged. Make a replacement. Absence or partial contact in the electrical connection circuit
ignition transformer and control and regulation unit. Check the presence of the contact if you need to restore it. The phase and zero in the network are mixed up. Connect the boiler correctly. The fuse has tripped reverse thrust due to too high a temperature rise due to leakage of combustion products. This is possible with complete or partial obstruction of the chimney. Clean the outlet pipes and chimney. To start, press the reset button. Also, error code E2 may occur in the following cases: The reverse thrust fuse is broken. Needs replacement. The electrical connection circuit of the reverse thrust fuse is damaged. Check connection. Restore. Lack of contact between the control unit backdraft fuse. Restore contact. The emergency thermostat tripped because the heating water temperature exceeded the maximum permitted value. Incorrect gas supply. Find out the reason. Eliminate. Emergency thermostat failure. Check its operation. At 95 degrees it should open. Install a new one if necessary. There is no electrical connection contact for the emergency thermostat. Check and fix. Poor or no contact between the emergency thermostat and the control and regulation unit. Check and replace if necessary. The ignition electrode is not installed correctly. Install correctly, taking into account that the distance between the end of the electrode and the plate is 3-4
mm. The gas valve did not open. The result is that the flame goes out. For diagnostics, it is necessary to check the contact of the main gas valve convector in the control unit. Replace if necessary.

Error E3- The heating water temperature sensor is open. The device does not turn on in both modes. The gas supply to the burner is interrupted, as a result there is no flame, the pump is not turned on. The heating water temperature sensor is broken. Needs replacement. The sensor has no contact. Check the connection. Also, error code E3 may occur in the following cases: Problems with the electrical connection circuit of the temperature sensor. Check and fix. There is no contact between the temperature sensor and the control and regulation unit. Contact needs to be restored.

Error E4- The domestic water temperature sensor is not closed. The Mora gas boiler operates in both modes. Instead of the sensor responsible for the temperature of the domestic water, the heating temperature sensor starts working. Accordingly, problems arise with regulating the desired temperature in DHW circuit. Also, error code E4 may appear in the following cases: The DHW sensor is faulty. Needs replacement. There is no contact with the temperature sensor. Check and restore. There is no contact in the electrical connection circuit of the temperature sensor. Check and restore. There is no contact between the temperature sensor and the control and regulation unit. Contact needs to be restored.

Error E5- Failure in the security module. The unit was stopped due to an emergency. With this error, the burner turns off and the flame goes out due to a gas supply interruption. The pump runs continuously. The emergency thermostat is triggered because the heating water temperature exceeds the maximum permissible value. This cuts off the gas supply. To eliminate it, you need to understand why the overheating occurred. Emergency thermostat failure. It is necessary to check its operation; at temperatures below 95 degrees it should be closed. If the failure is confirmed, replacement is required. The electrical connection circuit of the emergency thermostat is broken. Requires verification and restoration of operation. There is no contact between the emergency thermostat and the control and regulation unit. Troubleshooting and restoration required. Pressure switch connection missing. It is necessary to check the patency of the exhaust or supply path clean air. Fix the problem. Also, error code E5 may occur in the following cases: The pressure switch is broken. There is no connection to it when the fan is running. A new switch needs to be installed. Problems in the electrical connection circuit of the pressure switch. Check and restore circuits. There is no contact between the pressure switch and the control and regulation unit. Restore contact. tube,
connecting the pressure switch and the fan was either disconnected or damaged. It is necessary to check and install a new one if necessary. Perhaps the fan does not start working. The engine does not work. The impeller bearing has lost its mobility. The valve does not work due to any mechanical damage. If this problem occurs, the fan must be checked and replaced. There is no contact in the fan electrical connection circuit. There is no set speed of rotation of the fan blades. Check and fix. There is no contact between the fan and the control and regulation unit. To set up a contact.

Possible breakdowns of Mora Top gas boilers that are not displayed on the screen

The device cannot gain the power required to operate- In this case, the temperature of the water in the hot water supply or for heating does not heat up to the set value.

The Mora Top boiler always switches to minimum power mode when operating- Problems in the electrical connection circuit of the modulator to the coils. Check the cable and contact in the control and regulation unit. The modulator on the coil is broken. To resolve this issue you need complete replacement gas valve. The unit is not configured; its minimum and maximum capacities are set incorrectly. Re-adjustment of these parameters is required.

The device does not work in DHW mode- The burner does not turn on, there is no water heating. Poor water supply for household needs. The DHW filter is very dirty. It needs cleaning. The differential valve is very dirty. It needs cleaning. Water supply pressure is lower than required. To fix the problem, you need to increase the water supply pressure. If there is sufficient water pressure for the domestic hot water supply, the three-way valve does not switch. Check the water passage between the differential valve and the three-way valve. Clean if necessary. The 3-way valve is stuck. Try to fix the problem by turning the water supply to the hot water supply on and off. When
If this procedure is unsuccessful, install a new valve. The integrity of the membrane in the hydraulic part of the three-way valve may be damaged. A new one needs to be installed. The water supply is sufficient, the three-way valve switches from mode to mode. Check the clearance between the 3-way valve shaft, the motion transfer arm and the switch. Perhaps it's too big. Adjustments are required. Damage to the DHW switch. Needs replacement. The problem is in the electrical connection between the switch and the control and regulation unit. Restore the chain.

U wall-mounted boiler Mora problems with hot water supply, working burners, water heating for household needs is absent or insufficient- If the water supply pressure is good and the water in the taps is not heated to sufficient quantity. The problem is a heavily contaminated secondary heat exchanger. It needs cleaning. When the boiler is operating, water leaks out through the safety valve.

The following problems occur during operation of the device. After the heating water has heated to the required temperature, the pressure increases to two and a half bar. After this, the safety valve is activated and part of the water is discharged through it. In this case, when the water in the heating system cools, the pressure drops below the maximum permissible minimum value. Problems with expansion tank. There may be a violation of its tightness. And it is necessary to check the valve, and if it is damaged, install a new one. After this, you need to pump in the pressure set by the manufacturer. The membrane in the expansion tanks is damaged. A new expansion tank needs to be installed.

The water supply pressure for household needs is so high that it increases the pressure in the heating system to two and a half bar. It is necessary to check the valve on the hydraulic unit to replenish the heating system; it may be open. When the device operates in automatic mode, they are not deleted. air jams. The valve cap is too tight. Check this and unscrew it if necessary.

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Borino, ZhMZ, Siberia, Alfa Kalor, Termotechnik.
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Mora Top s.r.o. acquired close to modern look characteristics in 2000 as a subsidiary joint stock company under a similar name - Mora Moravia. But at the beginning of the last century, one of the boilers of the above-mentioned enterprise was manufactured in the amount of hundreds of thousands of units per year. By the way, it was the Meteor boiler that became the first heating equipment in the world, the manufacture of which took place abroad under a license agreement. In 1924, the Soviet government decided to produce this type of boiler in St. Petersburg (then Petrograd).

In 2003, the Mora Top company gained independence, which was strengthened in 2004 with the start of construction of a new plant. In the spring of 2006, the production and technical base of the Mora Top enterprise acquired the shape of today. But the plans of the company’s management include the commissioning of additional production lines, which will lead to an increase in the number of products produced by more than three times. However, already now the plant’s production capacity allows it to produce about one hundred thousand water heaters and about fifty thousand gas boilers per year.

The quantity of products and their quality indicators determine the fact that Mora Top heating equipment is distributed not only in the Czech Republic, but is also exported to Romania, Bulgaria, Poland, Slovakia and countries that once constituted Soviet Union.

The product range of the enterprise consists of the following categories: gas wall-mounted boilers - Titan (can be configured additional equipment, has an operating power of 14.8 kW, is immune to power surges, and is equipped with safety systems that ensure complete operational safety); electric boilers- Electra 8 (smart electric boiler, which is controlled by a microprocessor panel and can operate in more than ten functional modes; power from 2.5 to 7.5 kW); storage water heaters indirect heating- 100 NTR (are a hot water addition to heating boilers); combined storage water heaters - E 100 NTR (in addition to the possibility of receiving hot water from the energy of the heating boiler, they can heat it using the built-in electrical element); wall-mounted instantaneous gas water heaters - Vega (very compact, available with power from 17.3 to 26.4 kW); floor standing gas boilers with atmospheric burner- SA 20–60 (Classic series, fourteen different types power from 15 to 50 kW); floor-standing boilers with forced-air burner - VL100 - VL750 (sixteen types with power from 103 to 750 kW).

Modern gas boilers are quite complex technological equipment. With proper care and proper handling, the gas boiler will serve for a long time without any failures. However, even the most expensive and functional equipment has its resource, after which various types of malfunctions begin to appear.

Knowing the main causes of problems and the procedure for eliminating them, you will be able to repair your gas boiler with my own hands. This is a very painstaking, responsible, but in most cases relatively uncomplicated work.

First of all, it is necessary to establish why any malfunctions may occur in the operation of gas heating boilers. A number of different factors can lead to problems.

Electricity

Modern gas boilers are equipped by various means automation. These products, in turn, are powered by electricity. And, despite the fact that it is already the 21st century and systems for using alternative sources energy, the problem of stability of power grids remains relevant for many regions, especially for remote villages and all kinds of holiday villages.

A sudden shutdown or a strong surge in electricity is one of the main enemies of any modern gas boiler.

To avoid all the associated troubles, buy a high-quality stabilizer in advance. Do not spare money to purchase this device - cheap models are of little use, so it is better to immediately allocate funds to purchase a good stabilizer from famous manufacturer. Rest assured, if the automation breaks down, you will spend much more money on its repair and replacement.

Water

Often used at home wall models gas boilers. Such devices are simultaneously responsible for heating the premises and preparing hot water.

The design of wall-mounted boilers includes a flow-through heat exchanger. Low-quality hard water with various inclusions - main enemy gas boiler heat exchanger. Moreover, under the influence of low-quality water, the heat exchanger can fail in just one season.

To prevent such damage, install special filters. The best option– a complete water purification system. With it, your boiler will work for as long as possible, and using purified water is much safer for your health.

Installation errors

Any knowledgeable person will tell you: installation and wiring of gas heating equipment should be carried out exclusively by qualified specialists.

Even the slightest errors at the stages of installation and connection of equipment can lead to irreversible consequences. For example, incorrectly performed piping in the case of a cast-iron gas boiler with a power of more than 50 kW will lead to the fact that the unit will simply crack at low temperatures.

Therefore, if you are not an experienced gas installer, entrust the installation of the boiler to professionals - this way you will save yourself from many problems in the future.

Weather

Adverse atmospheric conditions can also lead to many different problems. During frosty winters, people turn on the heating at almost full power. This leads to a significant decrease in pressure in the gas pipeline system. As a result, boilers cannot reach their full potential.

You will not be able to solve this problem on your own - you still cannot explain to your neighbors that their actions are only aggravating the situation. As a solution to the problem, you can install an additional boiler that runs on a different fuel.

Is it worth repairing the boiler yourself?

A modern gas boiler is a complex and potentially dangerous system. The main danger of such units is the risk of a gas explosion in case of improper handling of the equipment or untimely elimination of various problems.

For maintaining the operation of the gas boiler optimal level Various types of automation respond. An inexperienced user is often unable to understand its structure. Therefore, to resolve serious problems, it is better to immediately invite specialists.

On your own, you can try to eliminate only visible damage and various contaminants that have led to the failure of the pipe, chimney and other parts of the boiler.

There are a number of typical problems that, in most cases, you can fix yourself. Problems will also be listed, in the event of which you can only protect yourself until a specialist arrives.

If there is a distinct smell of gas or smoke in the room, immediately turn off the boiler and leave the room, opening it for ventilation.

Call a specialist immediately. Trying to solve a gas leak problem on your own without the necessary skills is extremely dangerous and unwise.

Flame sensor failure

If the combustion sensor or gas supply pipe is broken, turn off the boiler, close all gas valves and allow the unit to cool completely.

After some time, return to the room to check for the smell of gas. If everything is fine with the draft, try turning the boiler on again. If there is no traction, immediately call a repairman.

Boiler overheating

Overheating is one of the most common problems with modern gas boilers. The reason for this may be a malfunction of automation equipment or a clogged heat exchanger.

Automation repairs cannot be handled without the appropriate knowledge.

You can clean the heat exchanger yourself. The most common materials for the manufacture of heat exchangers are copper and stainless steel. Cleaning them usually isn't a problem, but still be careful.

To clean the heat exchanger, simply remove it and thoroughly clean it with a wire brush. In case of copper heat exchanger, it is better to replace the brush with a metal sponge used for washing dishes.

Charge fan malfunctions

The problem with fans is their bearings. If your boiler fan stops developing the set number of revolutions, try to fix the problem as soon as possible.

To do this, remove the back of the fan, remove the stator and lubricate the bearings. Perfect for lubrication machine oil, but if possible it is better to use a higher quality carbon composition with heat-resistant properties for this.

An interturn short circuit can also cause problems with the fan. Only a specialist can cope with troubleshooting this problem. Submit the stator for repair to replace the winding, or immediately replace the faulty unit with a new device.

Chimney problems

Often, various problems in the operation of a gas heating boiler are caused by excessive clogging of the coaxial chimney.

Remove the chimney and thoroughly clean all its components of soot. This way you will not only return the previous level of efficiency of the unit, but also significantly increase the efficiency of the boiler.

Boiler equipment from a Czech company Mora TOP has long gained popularity among Russian users. Usage quality materials combined with modern technological solutions makes Mora equipment easy to operate and safe to use.

The company offers a wide range of products: wall-mounted gas and electric boilers, instantaneous gas water heaters, floor-standing cast iron boilers, various models water heaters. And if for buyers this fact is an undoubted advantage, then for service and repair specialists it is a serious burden. Big the lineup Mora equipment requires knowledge of the specifics of each line: individual features of technological schemes, nuances of connections, subtleties of maintenance and configuration. In addition to deep knowledge, boiler repair Mora TOP requires modern equipment and the availability of suitable spare parts.

Service center E-Tech will provide high-quality repairs And service maintenance any Mora boilers. Our center is part of the E-Tech group of companies, which provides services for the creation of various communications and the sale of climate and heating equipment. Therefore, our craftsmen can perform the entire range of activities: from design to repair and maintenance of systems of any complexity.

Wall-mounted and floor-standing gas boilers made in the Czech Republic are characterized by an excellent price-quality ratio. They are reliable, effective and safe. Their distinctive ability is stability when operating under Russian operating conditions. They continue to produce heat steadily as the pressure drops. So that your Mora TOP gas boiler pleases you with warmth and hot water- do not forget about its regular service in a specialized center.

Features of some boiler models and possible malfunctions:

Meteor wall-mounted gas boilers are equipped with a high-performance copper heat exchanger that is resistant to corrosion. If the quality of the water is low or the water treatment is insufficient, deposits may form on it, reducing the power of the boiler. Our service technician recommends inspecting and cleaning work surfaces at least once a year. One more nuance - you should not build cast iron radiators into the heating system.
The Sirius line of wall-mounted gas boilers has the function of automatically adapting fuel consumption to current needs. Modern electronic hardware requires absolute precision in installation and configuration. Otherwise, your boiler will consume more gas than required.

We offer comprehensive services and repair of gas boilers Mora TOP. It includes diagnostics; service; replacement, if necessary, of parts and components; correction of installation errors; commissioning and other necessary activities. From us you can order both one-time assistance and long-term maintenance of wall-mounted gas boilers Titan, Sirius, Meteor, Meteor Plus; floor-standing gas boilers with atmospheric burner SA.

Wall-mounted water heating electric boilers Electra Comfort and Electra Light will delight their owners with their efficiency and ease of control. Like all heating devices of this type, they are silent and absolutely environmentally friendly. But still, sometimes repair of Mora TOP electric boilers is necessary for uninterrupted operation heating equipment.

The service of Mora TOP electric boilers will allow you to maintain their high performance for the entire service life. From us you can get professional services at the best prices. In addition, we guarantee their quality and efficiency.

We use an integrated approach to the repair of Mora TOP electric boilers

Accurate diagnostics allows you to quickly carry out all the troubleshooting work and make sure that the problem does not arise in the future.
When repairing and servicing, use only original spare parts and Supplies guarantees absolute consistency of all system elements.
Final commissioning activities provide effective work all components, including automation.

This approach ensures stable operation of equipment long years and maximum security for users.

Our technicians travel to the site for repairs and service in company vehicles equipped with modern equipment and a stock of in-demand spare parts. In most cases, the work will be completed on the first visit to the site. If the breakdown requires more serious measures, they will be carried out at our repair base.

We are authorized to work with equipment from all leading manufacturers. E-Tech masters have the necessary permits and certificates to service liquid fuel, gas, solid fuel and electric heating boilers. For more than ten years we have been helping to keep our clients' homes warm and comfortable. We value your trust and do everything possible to ensure that you stay with us for many years to come.

Errors and malfunctions of Mora Top gas boilers

Malfunctions of Mora Top gas boilers with indication on the display

Error E0- The boiler does not work

Gas does not pass through gas fittings, the burner goes out, the pump does not work.

Malfunction internal element control and regulation unit - Replacement of the control and regulation unit.

Error E1- Wall-mounted boiler Mora Top does not work

The switch does not close. The gas fittings do not open the gas passage, the burner does not ignite, the pump does not work.

1. Lack of water in the heating system, the heating water filter is clogged - Clean the filter.

2. Lack of water in the heating system, defective pump - Replace the pump.

3. Lack of water in the heating system, the pump is set to stage 1 - Set the pump to the recommended stage 2 or 3.

4. Lack of water in the heating system, there is air in the system - Add water to the recommended pressure. De-air the heating system by switching between heating and domestic water heating modes. Turn the boiler off and on again using the ON/OFF button.

5. Insufficiently movable or completely stationary axis of the heating water flow switch, transmitting movement to the switch - Remove the switch box from the flow sensor body (pull out the stopper). By turning the boiler on and off again (turning the pump on and off), you can release the fixed axis. If the axis remains motionless, you can move it with your finger.

6. Big gap between the axle, the drive arm and the switch - Correct the position of the plastic drive arm.

7. Defective switch - Replace the switch.

8. The electrical connection circuit between the switch and the control and regulation unit is broken - Check the contact of the connector in the control and regulation unit. Check the wires to the switch.

Error E2- Mora Top wall mounted boiler does not work

The burner goes out as a result of a disruption in the gas supply through the gas fittings. When the flame goes out, the next ignition attempt occurs. The pump runs until the next ignition attempt, then stops.

1. Loss of burner flame as a result of a gas supply failure - Press the RESET button.

2. Loss of flame due to burner clogging (for example, only partially burns) - Clean the burner - outlet openings.

3. Electrode malfunction - the electrical connection line is broken - Replace the electrode.

4. Faulty ignition transformer or broken electrical connection line - Check and replace the ignition transformer.

5. Incomplete or broken contact in the electrical connection circuit of the ignition transformer and the control and regulation unit - Monitoring the contact of the connector in the control and regulation unit.

6. Don't correct connection phases when connecting the boiler to the electrical network - Make the correct phase connection.

7. Disabling the reverse draft fuse when the temperature is exceeded as a result of leakage of combustion products (partial or complete obstruction of the chimney) - Control of the patency of the combustion paths - exhaust pipes or chimney. To resume the boiler function, press the RESET button.

8. Defective reverse thrust fuse - Replace the fuse.

9. The electrical connection circuit of the reverse thrust fuse is broken - Check the electrical connection line.

10. The contact in the connection between the reverse thrust fuse and the control unit is broken - Check the contact of the connector in the control and regulation unit.

11. Disabling the emergency thermostat as a result of exceeding the maximum heating water temperature. Gas supply to the burner is interrupted - Find out the reason for the water overheating.

12. Defective emergency thermostat - Monitor the emergency thermostat (must be closed at temperatures below 95°C), replace if necessary.

13. Violation of the electrical connection circuit of the emergency thermostat - Monitoring the electrical connection line.

14. The contact in the connection between the emergency thermostat and the control and regulation unit is broken - Check the contact of the connector in the control and regulation unit.

15. Incorrect position of the ignition electrode - Check the position of the electrode. The distance between the end of the electrode and the burner plate should be 3-4 mm.

16. Loss of flame due to failure to open the main gas valve - Check the contact of the main gas valve connector in the control unit. Replace the defective valve.

Error E3- Heating water temperature sensor is open. The Mora Top gas boiler does not work either in heating mode or in domestic water heating mode.

The burner flame goes out as a result of a disruption in the gas supply through the gas fittings; the pump does not work.

1. Malfunction of the heating water temperature sensor - Replace the temperature sensor.

4. The contact in the connection between the temperature sensor and the control and regulation unit is broken - Check the contact of the connector in the control and regulation unit.

Error E4- The domestic water temperature sensor is open - The Mora Top gas boiler continues to operate in heating mode and in domestic water heating mode.

The temperature control function is taken over by the heating water temperature sensor - problems with maintaining the temperature of the service water.

1. Malfunction of the domestic water temperature sensor - Replace the temperature sensor.

2. The connection contact of the temperature sensor is broken - Check the connection contact.

3. Temperature sensor electrical connection circuit failure - Monitoring the electrical connection line.

4. The contact in the connection between the temperature sensor and the control and regulation unit is broken - Check the contact of the connector in the control unit.

Error E5- Malfunction on the safety module - Mora Top boiler does not work.

The burner flame goes out as a result of a disruption in the gas supply through the gas fittings; the pump runs continuously.

1. Disabling the emergency thermostat as a result of exceeding the temperature of the heating water. Stopping the gas supply to the burner - Find out the cause of overheating.

2. Defective emergency thermostat - Monitor the emergency thermostat (must be closed at temperatures below 95°C), replace if necessary.

3. Violation of the electrical connection circuit of the emergency thermostat - Monitoring the electrical connection line.

4. The contact in the connection between the emergency thermostat and the control and regulation unit is broken - Check the contact of the connector in the control unit.

5. Non-connection of the pressure switch - obstruction of the combustion products outlet or air supply - Eliminate the cause of the obstruction of the combustion paths.

6. Defective pressure switch - when the fan is turned on, it does not connect - Replace the pressure switch.

7. Violation of the electrical connection circuit of the pressure switch - Monitoring the electrical connection line.

8. Contact is broken in the connection between the pressure switch and the control and regulation unit - Check the contact of the connector in the control unit.

9. Fallout or damage to the tube connecting the pressure switch and the fan - Check, if necessary, replace the tubes.

10. Fan does not accelerate, burnt out motor, hardened impeller bearing, mechanically blocked valve - Check the fan functions, replace if necessary.

11. Violation of the fan electrical connection circuit - the fan does not accelerate - Check the electrical connection line.

12. The contact between the fan and the control and regulation unit is broken - Check the contact of the connector in the control unit.

Malfunctions of Mora Top gas boilers without indication on the display

The boiler has insufficient power - the temperature of the heating or service water does not reach the set value

The Mora Top boiler operates constantly at minimum power.

1. Violation of the electrical connection circuit of the modulation coil - Monitoring the supply cable of the modulation coil. Monitoring the connector contact in the control and regulation unit.

2. Defective modulation coil - Replacement of the gas valve.

3. The maximum and minimum boiler power are incorrectly adjusted - Adjusting the maximum and minimum minimum capacity boiler

The Mora Top wall-mounted boiler does not heat domestic water - the burner does not light

A. A small flow of domestic water.

1. The domestic water filter is clogged - Clean the domestic water filter.

2. The differential valve is stuck - Clean the differential valve.

3. Low water pressure - Increase water pressure.

B. The service water flow is sufficient, but the 3-way valve cannot be adjusted.

1. The tubes between the differential valve and the 3-way valve are clogged - Clean the connecting tubes.

2. Hardened three-way controlled valve - Swing the valve by turning the service water on and off. Replace the 3-way valve.

3. The membrane in the hydraulic part of the three-way valve is cracked - Replace the membrane.

B. The domestic water flow is sufficient, the three-way valve is adjusted.

1. Large gap between the axis of the rearranged three-way controlled valve, the movement transfer arm and the switch - Adjust the movement transfer arm.

2. Defective domestic water switch - Replace the switch.

3. Violation of the electrical connection circuit between the switch and the control and regulation unit - Check the contact of the connector in the control and regulation unit.

The wall-mounted boiler Mora Top does not heat the domestic water insufficiently or does not heat the domestic water at all - the burner is on

There is sufficient water flow low temperature domestic water.

Listed secondary heat exchanger in the hydraulic unit - Clean the heat exchanger.

Heating water flows out through the safety valve

A. After heating the heating water, the pressure in the heating system will increase by 2.5 bar - the water flows out through the safety valve; When the heating water cools, the pressure will decrease - less than the filling pressure.

1. Gas leak from the expansion vessel - Check the valve on the expansion vessel, replace it if necessary; increasing the pressure to the recommended value.

2. The membrane in the expansion vessel is cracked - Replace the expansion vessel.

B. The pressure in the heating system is increased by 2.5 bar due to the domestic water pressure.

The valve on the hydraulic unit for adding water to the heating system is not closed - close the valve.

The boiler does not ventilate well

The cap on the purge valve is tightened - Check the cap on the purge valve. He must be released.

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