Wall gas boiler MARS. Error codes for gas boilers Weller Main principles of installation and use

Gas boilers Weller - Operation, malfunctions and error codes

Weller boiler error codes

Error E1- There is insufficient or no water pressure in the circulation system. There is a problem with the hydraulic block, possibly a sticking stem. Flow sensor microswitch defective. In the event of a power outage, it is recommended to restart the water supply. Increase pressure to 1.2 bar and start heating.

Error E2- Protection against overheating or incorrect ignition. This mode is set in the device at a water temperature of +96 degrees, or due to malfunctions with the ignition system. It is recommended to check the gas supply. By pressing the "reset" button, reactivate the device.

Error E5- Malfunction of the control board program. To eliminate it, by pressing the "reset" button we restart the unit. If the action is ineffective, you should contact the service center.

Error E6- Damage to the heating sensor. Due to the incorrect performance of the function by the sensor, the unit enters the protection mode. It is recommended to disconnect the device from the network and replace this component. You can also call the service department.

Error E7- High temperature of the coolant. The protection cycle is activated in two cases: when the temperature of the heating system rises sharply to 97 degrees, or when the temperature of the hot water supply crosses the border of 81 degrees. It is required to disconnect from the power supply system. If the indicator drops by six degrees less than the recommended one, start by pressing the "reset" key.

Error E9- Malfunction of the hot water sensor. Due to the malfunctioning of the DHW sensor, the unit enters the protection mode. It is required to de-energize it and replace the hot water supply sensor or contact the service center.

In some cases, when using the unit, it can lower the temperature by ten or fifteen degrees in heating system and sometimes even disconnect. In this case, the connection of the device to the mains must be carried out by means of a stabilizer, therefore it is necessary to check it. Since the stabilizer itself can fail, and a malfunction can appear only when a malfunction is detected in the power consumers connected to it.

Boiler repair assistance Weller

For country house I want to install a wall gas boiler Weller Mars. Please tell us what is the nominal supply pressure of gas / methane / propane / these models?

In this type of equipment the nominal gas supply pressure for methane / propane is 20/37 mbar.

We use this brand of boiler indoors. Until this evening, he had acted well. Currently, 5 seconds after the start, the device began to extinguish. It seems that it cannot deliver water to the system. Explain what the problem is?

The probable cause of such a defect may be the ignition electrode, which does not see the fire, or a decrease in circulation.

They installed a mars 32 OC double-circuit boiler. On start-up, the burner ignites and goes out immediately. I believe there is no ignition spark. Help remove this accident?

It is required to check whether a sound is heard when the ignition spark is formed, in the case of removing the wire for ignition. If there is no sound, you must change the ignition transformer. If there is sound, replace the ignition electrode or burner.

Completed the connection of this unit at the end of 2016. Probably after five months, there was a failure. I adjust the temperature, but he doesn't keep it. Explain what could be?

Perhaps the automation fails, and at the moment the temperature rises by 65 degrees, the nozzles are turned off. It is necessary to readjust the automation for the correct performance of the functions. Another factor may be that the selected unmatched capacity of the unit in relation to the heated area.

The gas boiler mars 32 in DHW mode works intermittently (practically does not work). He has unusual behavior. When you turn on the tap DHW water heats up almost to boiling water, despite the fact that the sensor is +40 degrees. After 2-3 minutes, the boiling water turns off, cold water flows. After 2-3 minutes, it turns on and again brings the water temperature to boiling water. And so 4 times. After the last heating to boiling water, it gives cold water and will not turn on again. The heating circuit is working fine (I haven't checked it for a long time - summer). After I turn off the boiler, and it will stand for about 2 days de-energized and with the water supply tap closed, it turns on, and again the same troubles. What needs to be done, can change something?

You need to replace the temperature sensor.

Faced a Weller boiler repair. A few seconds after turning it on, it gives an E1 error. Power is not being supplied to the pump. The pump is running, the winding rang, the capacitor. The board does not supply power. Has anyone encountered this problem in their practice?

We must start with the fact that for this model, the coolant flow sensor is polled twice. Before starting the pump, it must be open, after that it must be closed. If any of the conditions is not met - error E1.

Boiler Weller Mars 26. Gives error E02, ignition error. The flame ignites and goes out. When the combustion chamber cover is removed, it works normally. As soon as you close the lid, it goes out. The chimney is clean, the fan was changed, the pneumatic relay, gas valve, ignition electrode, ignition unit. Nothing helped. The electrical network is normal. Who can help?

The turbocharged models should have the opposite. I would venture to suggest that either an overabundance or big disadvantage air.

Boiler Weller mars 26. It has a strong clock in operation. For example, it costs 40 degrees for heating, it turns on, heats up quickly to 38-40 degrees, the burner goes out, the temperature quickly drops to about 32-33, and the burner starts up again and so on in a circle. If I increase the temperature, for example, to 48, the unit heats up for a long time (the display shows the same temperature in the region of 49-50 or even drops by a degree). When all the water in the batteries heats up, the burner goes out, and then the temperature slowly drops. The burner turns on, and now it starts to clock again as well. What thoughts? Poor permeability in the heating system? Is there a filter in it? Gas not regulated? And you can somehow increase the delta?

It looks like a typical malfunction electronic board when the unit stops modulating the flame and heats up at maximum.

Boiler mars 26. Boiler does not start. He does not write anything (it shows two zeros), does not react to the reset, the display goes out with the power button. The unit is double-circuit, the water circuit is closed with two plugs. Gas is normal. The pressure in the system is 1.5-2 atm. The boiler turned off, since there were problems with the gas supply, the pressure dropped to 0, but it does not give errors. Last time there was a similar situation: the light was turned off for half a day, the pressure dropped, it did not turn on, it gave an error (little pressure). I raised the pressure, but it didn't turn on anyway. It rumbles twice and stands. Somehow it happened (pumped more than 2 atm. Pressure and then decided to bleed it a little to 1.5), that the next time the power plug was turned on, the unit immediately began to turn the pump and then turned on. But this time it’s not. What could it be?

There was a similar problem. The boiler issued an E6 error, apparently it lacks traction or the exhaust is bad, pulled out the tubes from the sensor to the fan. I stuck one tube on the fan and clicked the piezo. I made a reset, the device was quickly tested, started the fan and lit the burner. I did not stick the second pipe, I waited two hours for the system and the chimney to warm up well with internal air. Turned it off, then installed all the tubes as it was, turned it on, and it started up normally.

Please help with the problem: the mars 32 OC boiler does not turn on, it shows an E1 error (no pressure in the heating system). The pressure is normal, above 1 bar, the pump does not start, a faint click is heard. The red LED on the DHW flow sensor is on, although I do not use DHW, the outlet there is muted, and through the input I only feed the unit.

First, look at the DHW flow sensor, clean or replace the bronze screw-in "cartridge". Then look at the heating flow sensor. Most likely, you have it filled with water. It is necessary to change the oil seal and dry the microswitch.

A year ago, this device was connected to the system. Today, at the time of start-up, the wick lights up for 10 seconds, and the main burner does not pick up the fire, and the unit goes out. How can you get out of the situation?

Probably, the automatic ignition device is not working or there is a problem with the burner. Just in case, see if the phasing is out of order when connecting to the power supply.

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Weller boilers - Errors and their meaning

Wall double-circuit gas boilers Weller are used for heating systems in rooms up to 230 sq. meters. The modulating burner allows you to achieve the highest heat transfer when operating at any power, which is the main advantage of the design of this brand. The unit has a combustion chamber closed view, as well as an additional condensation module that absorbs heat from the exhaust gases.

The control is simple and straightforward, almost all adjustments are made in automatic mode. Wall mounted models Mars is connected to a standard vertical chimney, and the removal of combustion products and air intake from the street is forced by means of coaxial chimney.

To maximize the performance of these models, they are equipped with parts and components from renowned companies in Europe. If the automation detects any malfunction, the display shows a symbol with an error code. All models are equipped with separate heat exchangers.

The control unit in automatic mode monitors the required pressure in the pipeline and sets the most favorable operating mode at which the use of gas will be the smallest. Before use, you need to study the instructions. The error codes that appear on the display can help to detect and eliminate the malfunction in a timely manner.

Weller boiler error codes

Error E5- Malfunction of the control board program. To eliminate it, by pressing the "reset" button, we restart the unit. If the action is ineffective, you should contact the service center.

In some cases, when using the unit, it can reduce the temperature by ten or fifteen degrees in the heating system, and sometimes even turn off. In this case, the connection of the device to the mains must be carried out by means of a stabilizer, therefore it is necessary to check it. Since the stabilizer itself can fail, and a malfunction can appear only when a malfunction is detected in the power consumers connected to it.

The gas boiler mars 32 in DHW mode works intermittently (practically does not work). He has unusual behavior. When the hot water tap is turned on, the water heats up almost to boiling water, despite the fact that the sensor is +40 degrees. After 2-3 minutes, the boiling water turns off, cold water flows. After 2-3 minutes, it turns on and again brings the water temperature to boiling water. And so 4 times. After the last heating to boiling water, it gives out cold water and will no longer turn on. The heating circuit is working fine (I haven't checked it for a long time - it's summer). After I turn off the boiler, and it will stand for about 2 days de-energized and with the water supply tap closed, it turns on, and again the same troubles. What needs to be done, can change something?

You need to replace the temperature sensor.

Boiler Weller Mars 26. Gives error E02, ignition error. The flame ignites and goes out. When the combustion chamber cover is removed, it works normally. As soon as you close the lid, it goes out. The chimney is clean, the fan, pneumatic relay, gas valve, ignition electrode, ignition unit were changed. Nothing helped. The electrical network is normal. Who can help?

The turbocharged models should have the opposite. I would venture to suggest that there is either an overabundance or a great lack of air.

It looks like a typical malfunction of the electronic board, when the unit stops modulating the flame and heats up at maximum.

Boiler mars 26. Boiler does not start. He does not write anything (it shows two zeros), does not react to the reset, the display goes out with the power button. The unit is double-circuit, the water circuit is closed with two plugs. Gas is normal. The pressure in the system is 1.5-2 atm. The boiler turned off, because there were problems with the gas supply, the pressure dropped to 0, but it does not give errors. Last time there was a similar situation: the light was turned off for half a day, the pressure dropped, it did not turn on, it gave an error (little pressure). I raised the pressure, but it didn't turn on anyway. It rumbles twice and stands. Somehow it happened (pumped more than 2 atm. Pressure and then decided to bleed it a little to 1.5), that the next time the power plug was turned on, the unit immediately began to turn the pump and then turned on. But this time it’s not. What could it be?

First, look at the DHW flow sensor, clean or replace the bronze screw-in "cartridge". Then look at the heating flow sensor. Most likely, it is flooded with water. It is necessary to change the oil seal and dry the microswitch.

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The device and principle of operation of boilers Weller

Weller double-circuit hinged gas boilers are designed for heating rooms up to 240 square meters... The maximum heat transfer, when operating at any power, allows the use of a modulating burner - the main advantage of the design of these boilers. Combustion chamber in devices closed type, in addition, there is an additional condensation module, which also collects heat from the exhaust gases.

No human intervention is required during operation, as all settings are performed automatically. Wall mounted boilers Weller Mars is connected to a classic vertical chimney, and the exhaust of combustion products and a fence fresh air takes place forcibly through a coaxial chimney.

In order to increase the productivity of this brand, all of its models are supplied with nodes from leading European companies - Wilo, SWEP, FUGAS, etc. In the event that the automatic device detects a malfunction, a corresponding signal is given to the display, where error codes are displayed.

All units are equipped with separate heat exchangers, and the control unit automatically controls the required pressure in the pipeline and sets the best option work at which the gas consumption will be minimal. During operation, it is necessary to study any Weller gas boiler. Errors that appear on the screen will help you identify the problem in time and quickly solve it.

Major error codes

e1

Error e1 - insufficient water pressure or no water in circulation system... Valve body defective - stem may jam. Defective flow sensor microswitch. With the electricity turned off, in accordance with the instructions, supply water again. Raise the pressure to 1-1.2 bar and turn on the heating.

Boiler valve body Weller

e2

Error e2 - protection against overheating or faulty ignition has worked. The boiler enters this mode at a water temperature of +95 degrees, or due to a faulty ignition. Check gas supply. Press "reset" and start the device again.

e5

Code e5 - software malfunction. Press the "reset" button or restart the device. If this does not help, call a specialist.

e6

Error e6 - the heating system sensor is faulty. The boiler has entered a protection mode due to a malfunctioning sensor. Switch off the device and replace the corresponding element. If necessary, invite a specialist.

e7

Code e7 - increase in the temperature of the coolant. The protective mode turns on when the system temperature rises quickly to 95 degrees, as well as when the hot water supply rises to 80 degrees. Disconnect from the power supply, and when the indicator drops by 6 degrees less than the specified one, start it with the "reset" button.

e9

Error e9 - triggered by a malfunction signal from the DHW sensor. Due to the abnormal operation of the sensor, the boiler has entered the protection mode. Disconnect power and replace sensor. Or call a specialist.

DHW flow sensor

Other malfunctions

Sometimes, during the operation of Weller boilers, the device suddenly begins to drop the temperature in the heating system. At 10 or even 20 degrees. It may even turn off completely. At the same time, it is connected to the electrical network through a stabilizer.

In such a situation, it is the stabilizer that should be checked. Quite often, such devices fail unnoticed by the eyes, and the problem is revealed only when a breakdown of the consumers connected to them is detected. It is recommended to use a voltage stabilizer when connecting gas boilers.

Description: Boilers Weller Mars and Mars OC- double-circuit boilers with two separate heat exchangers provide heat

an apartment or house with an area of up to 300 m2 and hot water for 2-3 points of draw-off.

The security system monitors the flow of gas, the presence of a flame on the burner, overheating of the heat

and the condition of the flue ducts.

... Automatic fault detection function and fault code indication.

... In the event of a flame blowout, the flameout protection is triggered, which instantly cuts off the gas supply.

... Temperature limited protection. Prevents damage to the boiler if the temperature rises too high.

If the temperature in the heating system rises sharply, the automatic bypass valve protects the heat exchanger from

overheating.

... Protection with safety valve 3 bar (1 bar = 1 kgf / cm = 0.1 MPa) protects the system pipeline

we are from excess pressure.

... In the absence of draft in the chimney, the pressure switch automatically turns off the boiler.

... The water pressure switch ensures that the boiler does not start up in the absence of water or insufficient water

pressure.

... The three-minute delay function is used to prevent frequent boiler starts

and increases its service life.

... Circulation pump blockage protection: (it switches on automatically every 24h.)

Design

. Open camera combustion - MARS OC, closed chamber combustion - MARS.

... Two independent heat exchangers for heating and hot water supply.

... For heating, the heat exchanger is copper, and for DHW it is a plate

made of stainless steel.

... Stainless steel burner.

... Gas pressure regulator.

... Built-in expansion tank.

... Air supply control system.

... 3-speed circulation pump with automatic air vent.

... Pressure gauge.

... Automatic bypass.

... Post-circulation of the pump.

Automation system

... Automatic electronic ignition system and security systems.

... Smooth electronic ignition.

... Precision of installation and maintenance temperature regime up to ± 1 ° C.

... The boiler has electronic flame modulation in heating and hot water mode.

Characteristic
Nominal heat input
Rated heat output
Heating system temperature range
Heating system operating pressure
Maximum pressure of the heating system
Expansion tank capacity
Expansion vessel set pressure
Hot water temperature control
Maximum pressure of tap water
Minimum tap water pressure
Δt = 25 ° C, hot water possible
Δt = 35 ° C, hot water possible
Voltage / frequency
Maximum power consumption
IP protection class
Pipe connection	Heating system

	DHW system

Nominal pressure for natural gas
LPG pressure rating

This article contains all possible malfunctions and options for their elimination, as well as error codes for Weller boilers. All information is read in next order: code - name - possible malfunction... If you have any additional questions, please leave them in the comments to this article.

If you are not 100% sure what the problem is and that you can solve it, immediately contact the service center for diagnostics and troubleshooting.

You can find out the price and buy heating equipment and related products from us. Write, call and come to one of the shops in your city. Delivery throughout the territory of the Russian Federation and the CIS countries.

Wall-mounted double-circuit gas boilers Weller are used for heating systems in rooms up to 230 sq. meters. A modulating burner allows you to achieve the highest heat transfer when operating at any power, which is the main advantage of the design of this brand. The unit has a closed combustion chamber, as well as an additional condensation module that absorbs heat from the exhaust gases.

The control is simple and straightforward, almost all adjustments are made in automatic mode. Wall-mounted Mars models are connected to a standard vertical chimney, and the exhaust of combustion products and air intake from the street are forced by means of a coaxial chimney.

The control unit in automatic mode monitors the required pressure in the pipeline and sets the most favorable operating mode, in which the use of gas will be the least. Before use, you need to study the instructions. The error codes that appear on the display can help to detect and eliminate the malfunction in a timely manner.

Error code E1 - Pressure error

There is insufficient or no water pressure in the circulation system. There is a problem with the hydraulic block, possibly a sticking stem. Flow sensor microswitch defective. In the event of a power outage, it is recommended to restart the water supply. Increase pressure to 1.2 bar and start heating.

Error code E2 - Protection against overheating or incorrect ignition

This mode is set in the device at a water temperature of +96 degrees, or due to malfunctions with the ignition system. It is recommended to check the gas supply. By pressing the "reset" button, reactivate the device.

Error code E5 - Malfunction of the control board program

To eliminate it, by pressing the "reset" button we restart the unit. If the action is ineffective, you should contact the service center.

Error code E6 - Damage to the heating system sensor

Due to the incorrect performance of the function by the sensor, the unit enters the protection mode. It is recommended to disconnect the device from the network and replace this component. You can also call the service department.

Error code E7 - High temperature of the coolant

The protection cycle is activated in two cases: when the temperature of the heating system rises sharply to 97 degrees, or when the temperature of the hot water supply crosses the border of 81 degrees. It is required to disconnect from the power supply system. If the indicator drops by six degrees less than the recommended one, start by pressing the "reset" key.

Error code E9 - DHW sensor error

Hot water sensor malfunction. Due to the malfunctioning of the DHW sensor, the unit enters the protection mode. It is required to de-energize it and replace the hot water supply sensor or contact the service center.