Monlan Gas Boiler Error Codes brings warmth and comfort to the homes of many users. The devices are designed for a long service life during which failures may occur. Gas boiler “Mora” is prone to malfunctions, so we will summarize typical problems of the brand. You will learn how to deal with malfunctions yourself.
Monlan Boiler Error Code Solutions
Monlan Boiler Error Code E1
This code indicates that there is no ignition. The ionization flame sensor indicates a malfunction of the device. This element recognizes the presence of a flame and stops the functioning of the Monlan boiler during limited combustion of the main gas burner or in case of interruptions in the gas supply. The mode of operation is terminated after three unsuccessful starts. To restore the functions, you must press and hold the reset key. Gas valve failure – The gas valve is controlled by an electronic board.
Diagnostics of this component is carried out by measuring voltage and resistance. If the readings do not correspond to the nominal characteristics, the valve should be replaced. No gas flow to the unit – There is a valve in the gas distribution system, which can block the flow of gas. Therefore, a failure at the start of the device may occur due to a closed valve. Poor contact or no signal from the ionization flame sensor. Malfunction of the electronic control board – If the ignition cycle is error-free, but the unit suddenly goes out, then apparently the electronics do not recognize the flame. In this case, it is necessary to diagnose it.
Monlan Boiler Error Code E3 (E4)
Problem with overheating of the Monlan boiler heat exchanger. The unit is blocked. The overheating thermostat has tripped – The overheating thermostat, as well as the temperature sensor, are mainly located on the outlet pipe of the main heat exchanger. An important function of the thermostat is to protect the boiler unit from elevated temperatures. An accident most often occurs due to problems in the thermostat, temperature sensor, and in addition, if the operation of the main circulation circuit is difficult.
Damage to the temperature sensor – An incorrect signal comes to the electronic board or the contact between the control board and the sensor is broken. Faulty overheating thermostat – If the component is OK, but there is an actual overheating of the coolant, then there is probably a problem with the circulation of the coolant in the heating circuit. Clogged primary heat exchanger or heating circuit filter (poor circulation causes high liquid heating). The circulation pump is damaged or there is an air blockage in the heating system.
Monlan Boiler Error Code E9
Indicates that the system pressure indicator is low. The main factors due to which this problem may appear: a decrease in water pressure in the heating system. Lack of contact between the electronic board and the pressure switch. Pressostat malfunction. Initially, you need to check the results of the pressure gauge. Very often, the problem can be fixed with a make-up valve, which is installed to fill the coolant into the system. If the problem persists again, then there may be a water leak. The hydraulic pump, primary heat exchanger, excess pressure relief valve, worn gaskets, make-up valve and other components can leak. A leak can be detected during the inspection of hydraulic components.
Monlan Boiler Error Code E2
Weak traction. For the stable and safe operation of the gas unit, it is required to organize traction for the removal of combustion products so that they do not enter the living quarters. This is followed by automation, and if any problems appear, the draft sensor will turn on and the unit will be blocked. The main factors that contribute to the lack of draft: the limited diameter of the chimney channel, improper installation, clogging with dirt, ice on the inner wall. Limiting the size of the outlet channel causes insufficient traction.
The chimney pipe is too long It is recommended to carefully read the installation manual of the appliance and follow all the necessary requirements. A sufficiently long horizontal section of the flue pipe can cause a lack of necessary draft. Traction sensor failure – When a vacuum occurs in the supply tube, a characteristic click can be heard. There is no contact between the control board and the draft sensor, condensate in the tubes, as well as incorrect fastening of the tubes with the pneumatic relay. Fan defective – There is a blockage in the fan impeller.
There is not enough lubricant on the fan shaft, so it does not generate the required speed. There is no contact between the control board and the fan. so it doesn’t generate the required RPM. There is no contact between the control board and the fan. so it doesn’t generate the required RPM. There is no contact between the control board and the fan.
Monlan Boiler Error Code E5 (E6)
Malfunction of the hot water temperature sensor. This indicates that the DHW circuit temperature sensor is broken or the desired temperature is too high. The main reasons preceding this problem: the hot water temperature sensor is not operational. Lack of contact between the control board and the DHW temperature sensor. Damage to the electronic board. When the hot water temperature sensor is working and firmly connected to the electronic board, but the boiler gives an error, then the electronic board may need to be repaired.
Monlan Boiler Error Code E8
Ignition problem. This situation is displayed if there is no ignition or if the flame breaks off. It is required to check the connections between the ignition unit and the flame sensor, and also between the board and the gas valve. The main factor in the failure of the flame is unsatisfactory traction.
Monlan Boiler Error Code E7
Failure of the temperature sensor of the heating system. This circumstance indicates that the temperature sensor of the heating system has broken or the operating temperature has risen. Damaged heating circuit temperature sensor circuit – This problem most often occurs when the connection between the temperature sensor and the electronic board is interrupted, or the temperature is below the nominal temperature.
Five seconds after the failure is detected, the Monlan boiler must return to normal operation, in case the malfunction occurred by accident. It is necessary to check that there is no moisture on the temperature sensor connector and the controller connector. If there is no moisture, the sensor should be changed. A short circuit of the heating water temperature sensor has occurred – This problem may occur due to a short circuit of the contacts of the temperature sensor or the value of the water temperature is higher than the nominal value. The first step is to measure the resistance of the sensor. If the resistance values are different from the required values, it is recommended to change the sensor. If the installation of a new sensor does not work, change the electronic board.
The Monlan boiler was put into operation. This week, almost around the clock gives an E1 error. After resetting with the reset key, the unit periodically starts normally, but this happens quite rarely. Just recently I removed the air cap plug and it worked better. What might be wrong?
When it starts to give an error related to the chimney, it is imperative to open the protection covers. This will help draw air out of the room. Then inspect the flue pipe for ice and clean if necessary. In the event of a flame failure, it is recommended to find out if gas is being supplied to the room.
The gas boiler constantly displays the error code E7. Can you please tell me what it means?
This code refers to a malfunction of the heating NTC temperature sensor. It looks like it needs to be changed.
Why does the Monlan boiler not start? And the error E3 still lights up regularly. What should be done?
This failure is usually issued due to any problems in the thermostat, temperature sensor, as well as in case of malfunctions in the main circulation circuit. Apparently, there is overheating of the liquid in the heat exchanger. If the thermostat and temperature sensor are not damaged, then the problem is in the control board. You must replace it.
What is the problem if the machine does not start up and gives an error code E9? Holds pressure well, no leaks. I disconnect from the socket, but the accident does not go away. Tell me what’s the reason?
This situation usually appears when the fluid pressure in the heating circuit is reduced. With this problem, it is necessary to check the pressure switch. It’s probably faulty.
The malfunction of the device is as follows: hot water supply is set to 40 degrees. At the moment the hot water tap is opened, the gas burner device lights up for a short time and quickly goes out. This cycle happens regularly. From the mixer can go either cold water or warm. Error E4 is repeatedly displayed. For what reason did this happen?
This circumstance indicates that the liquid of the hot water circuit is overheating. Most likely, the heat exchanger is clogged with debris, or the thermostat has incorrect settings.
There was such a problem. during ignition, the device shows an error with the code E8. If you restart, it turns on, but the burner barely ignites, you can hear some clicks, and the error is displayed again. I replaced the ionization electrode, washed the flow sensor, removed the earth from the plug, but the result was zero. Who has experienced this?
This issue can occur for three reasons. Control electrode defective. The gas supply is incorrect. Electronic board defective.
The device spontaneously stopped working and the code E9 is displayed. What can be done?
There is no water in the device or the pressure switch sensor is damaged. First, add water to the heating system.
The gas unit stops working with the error code E2 displayed. Cleaned and purged – no result. What happened?
This code indicates a lack of traction, and it is required to check the exhaust gas system. Presumably the membrane is stuck. In other cases, it is required to contact the service department for a thorough inspection of the gas boiler with further inspection.
In our house there is a Monlan boiler. Error E5 began to be issued. The unit itself does the work, the temperature level of the liquid is regulated manually. When it was installed, it seems that overheating began, since the automatic temperature mode was turned on. There is no outdoor air temperature sensor. What is the reason and how to fix it?
Presumably, there is damage to the DHW temperature sensor. Sometimes the control board is faulty.
The unit performs the functions for about four to five minutes, after which the gas burner goes out, and error E2 comes out. It glows for about a minute, the burner is re-ignited, and the device operates acceptably for another 3-4 minutes, and so many times. This failure, based on the instruction manual, means that the draft sensor has worked, but the chimney channel is clean, the combustion products are removed well. Please tell me what is the cause of the problem?
In a particular case, the main factors for the lack of thrust are: failure of the pneumorelay-thrust sensor. There is no contact between the control board and the thrust sensor. There is condensate, as well as improper connection of the tubes to the pneumatic relay. The fan is damaged. Presumably, he fails to develop the necessary momentum.