EP3369994B1 - Method for determining the cause of an ignition failure at the burner of a boiler - Google Patents

Method for determining the cause of an ignition failure at the burner of a boiler Download PDF

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Publication number
EP3369994B1
EP3369994B1 EP18159104.1A EP18159104A EP3369994B1 EP 3369994 B1 EP3369994 B1 EP 3369994B1 EP 18159104 A EP18159104 A EP 18159104A EP 3369994 B1 EP3369994 B1 EP 3369994B1
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Prior art keywords
signal
ignition
burner
boiler
ionization
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EP18159104.1A
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German (de)
French (fr)
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EP3369994A1 (en
Inventor
Sebastian Hack
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Viessmann Werke GmbH and Co KG
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Viessmann Werke GmbH and Co KG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
    • F23N5/123—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/16—Measuring temperature burner temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2229/00—Flame sensors
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/10—Fail safe for component failures
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2231/00—Fail safe
    • F23N2231/12—Fail safe for ignition failures

Definitions

  • the invention relates to a method for determining the cause of a misfire on the burner of a heating boiler according to the preamble of claim 1.
  • a method of the type mentioned at the beginning is generally known, so that no special printed evidence is required in this regard.
  • the burner is used to burn a mixture of a gaseous or liquid fuel and air.
  • an ignition electrode is used to ignite the mixture during an ignition phase.
  • an ionization electrode is used to monitor the combustion of the mixture. At least during the ignition phase, a temperature of the boiler, an air mass flow flowing to the burner, a voltage supply for the ignition electrode and an ionization signal from the ionization electrode are also monitored. If, due to a false start of the boiler, there is no flame formation on the burner, an error message is output to the control, namely the so-called "Error EE", which stands for the fact that no flame could be detected.
  • Error EE namely the so-called "Error EE"
  • the invention is based on the object of improving a method of the type mentioned at the beginning.
  • a method is to be created in which not only the error message as such, but also the technical cause of the error is displayed.
  • a missing ionization signal and a missing voltage change between the ignition electrode and the burner are detected during the ignition phase, a signal is generated with the information that no ignition spark has been generated, and that if a missing ionization signal is detected during the ignition phase and a temperature rise of the boiler after the ignition phase, a signal is generated with the information that the ionization electrode is defective, and that if a missing ionization signal and a missing air mass flow drop is detected during the ignition phase, a signal with the information that the burner is not Fuel has been supplied.
  • the method according to the invention is characterized in that, based on the aforementioned system-internal information from the heating boiler, it is concluded what exactly is the cause of the lack of flame formation. This allows the time to diagnose errors to be reduced and the defective component to be exchanged in a targeted manner.
  • the stipulation "and" used in the characterizing part of claim 1 expresses that the three options mentioned are tried out until at least one cause has been determined. So it can be that the cause is already determined after the first test; It could just as well be that the cause was only discovered after the last test is found. According to the invention, the order of the test is basically arbitrary, even if there is actually a preferred order, which will be explained further below.
  • the method according to the invention considerably shortens the troubleshooting process if the boiler starts incorrectly, since it is displayed directly whether the cause is a missing ignition spark, a defective ionization electrode or a lack of fuel.
  • a maximum of three tests are provided to determine the cause of the misfire on the burner, namely if a missing ionization signal and a missing voltage change between the ignition electrode and the burner are detected during the ignition phase, a signal with the Information is generated that no ignition spark has been generated, and if a missing ionization signal is detected during the ignition phase and a temperature rise of the boiler after the ignition phase, a signal is generated with the information that the ionization electrode is defective, and if a missing ionization signal and If the air mass flow rate is missing during the ignition phase, a signal is generated with the information that no fuel has been supplied to the burner, these three tests being carried out in any order and the remaining of the three tests not more should be done once any of the tests determine the cause of the misfire.
  • the burner 1 for burning a mixture of a gaseous or liquid fuel and air, an ignition electrode 2 for igniting the mixture during an ignition phase and an ionization electrode 3 to monitor the combustion of the mixture.
  • a temperature of the boiler, an air mass flow flowing to the burner 1, a voltage supply of the ignition electrode 2 and an ionization signal of the ionization electrode 3 are monitored.
  • a signal is generated with the information that no ignition spark has been generated and / or that if one is detected missing ionization signal during the ignition phase and a temperature rise of the boiler after the ignition phase, a signal is generated with the information that the ionization electrode 3 is defective, and / or that if a missing ionization signal and a missing air mass flow drop during the ignition phase is detected, a signal with the Information is generated that the burner 1 no fuel was supplied.
  • a temperature rise of the boiler can be determined, which is the case with lack of ionization signal indicates that the cause of the - in this case alleged - misfire is a defective ionization electrode 3.
  • time segment D a proper burner start is finally shown for comparison, during which the ionization signal then also rises in a typical manner.
  • the determination of an error is made by a computing unit of a controller of the heating boiler.
  • the signal is displayed on a display of a controller of the heating boiler or is passed on to another processing unit for further use via data transmission.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Other Investigation Or Analysis Of Materials By Electrical Means (AREA)

Description

Die Erfindung betrifft ein Verfahren zur Bestimmung der Ursache einer Fehlzündung am Brenner eines Heizkessels gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a method for determining the cause of a misfire on the burner of a heating boiler according to the preamble of claim 1.

Ein Verfahren der eingangs genannten Art ist allgemein bekannt, so dass es diesbezüglich keines besonderen druckschriftlichen Nachweises bedarf. Bei einem solchen Verfahren dient der Brenner zur Verbrennung eines Gemisches aus einem gasförmigen oder flüssigen Brennstoff und Luft. Außerdem dient eine Zündelektrode zur Entzündung des Gemisches während einer Zündphase. Schließlich dient eine Ionisationselektrode zur Überwachung der Verbrennung des Gemischs. Dabei wird mindestens während der Zündphase außerdem eine Temperatur des Heizkessels, ein zum Brenner strömender Luft-Massenstrom, eine Spannungsversorgung der Zündelektrode und ein Ionisationssignal der Ionisationselektrode überwacht. Sollte aufgrund eines Fehlstarts des Heizkessels eine Flammenbildung am Brenner ausgeblieben sein, so wird an der Regelung eine Fehlermeldung ausgegeben, nämlich der bei der Anmelderin sogenannte "Fehler EE", der dafür steht, dass keine Flamme detektiert werden konnte. Ein Verfahren gemäß dem Stand der Technik zur Bestimmung der Ursache einer Fehlzündung ist beispielsweise aus der US5938424 bekannt.A method of the type mentioned at the beginning is generally known, so that no special printed evidence is required in this regard. In such a method, the burner is used to burn a mixture of a gaseous or liquid fuel and air. In addition, an ignition electrode is used to ignite the mixture during an ignition phase. Finally, an ionization electrode is used to monitor the combustion of the mixture. At least during the ignition phase, a temperature of the boiler, an air mass flow flowing to the burner, a voltage supply for the ignition electrode and an ionization signal from the ionization electrode are also monitored. If, due to a false start of the boiler, there is no flame formation on the burner, an error message is output to the control, namely the so-called "Error EE", which stands for the fact that no flame could be detected. For example, one prior art method for determining the cause of a misfire is disclosed in US Pat US5938424 known.

Der Erfindung liegt die Aufgabe zugrunde ein Verfahren der eingangs genannten Art zu verbessern. Insbesondere soll ein Verfahren geschaffen werden, bei dem nicht nur die Fehlermeldung als solche, sondern darüber hinaus auch noch die technische Ursache für den Fehler angezeigt wird.The invention is based on the object of improving a method of the type mentioned at the beginning. In particular, a method is to be created in which not only the error message as such, but also the technical cause of the error is displayed.

Diese Aufgabe ist mit einem Verfahren der eingangs genannten Art durch die im Kennzeichen des Patentanspruchs 1 aufgeführten Merkmale gelöst.This object is achieved with a method of the type mentioned at the beginning by the features listed in the characterizing part of claim 1.

Nach der Erfindung ist also vorgesehen, dass bei Feststellung eines fehlenden Ionisationssignals und einer fehlenden Spannungsänderung zwischen der Zündelektrode und dem Brenner während der Zündphase ein Signal mit der Information erzeugt wird, dass kein Zündfunke erzeugt wurde, und dass bei Feststellung eines fehlenden Ionisationssignals während der Zündphase und eines Temperaturanstiegs des Heizkessels nach der Zündphase ein Signal mit der Information erzeugt wird, dass die Ionisationselektrode defekt ist, und dass bei Feststellung eines fehlenden Ionisationssignals und eines fehlenden Luft-Massenstromeinbruchs während der Zündphase ein Signal mit der Information erzeugt wird, dass dem Brenner kein Brennstoff zugeführt wurde.According to the invention it is provided that if a missing ionization signal and a missing voltage change between the ignition electrode and the burner are detected during the ignition phase, a signal is generated with the information that no ignition spark has been generated, and that if a missing ionization signal is detected during the ignition phase and a temperature rise of the boiler after the ignition phase, a signal is generated with the information that the ionization electrode is defective, and that if a missing ionization signal and a missing air mass flow drop is detected during the ignition phase, a signal with the information that the burner is not Fuel has been supplied.

Mit anderen Worten zeichnet sich das erfindungsgemäße Verfahren somit dadurch aus, dass anhand der genannten systeminternen Informationen des Heizkessels geschlussfolgert wird, was genau die Ursache für die fehlende Flammenbildung ist. Hierdurch kann die Zeit zur Fehlerdiagnose reduziert und die defekte Komponente gezielt getauscht werden.In other words, the method according to the invention is characterized in that, based on the aforementioned system-internal information from the heating boiler, it is concluded what exactly is the cause of the lack of flame formation. This allows the time to diagnose errors to be reduced and the defective component to be exchanged in a targeted manner.

Die im Kennzeichen des Patentanspruchs 1 verwendete Maßgabe "und" bringt dabei zum Ausdruck, dass die drei genannten Optionen solange durchprobiert werden, bis mindestens eine Ursache ermittelt ist. Es kann also sein, dass bereits nach der ersten Prüfung, die Ursache feststeht; genauso gut kann es aber auch sein, dass die Ursache erst nach der letzten Prüfung gefunden ist. Die Reihenfolge der Prüfung ist dabei erfindungsgemäß grundsätzlich beliebig, auch wenn es tatsächlich, was weiter unten noch erläutert wird, eine bevorzugte Reihenfolge gibt.The stipulation "and" used in the characterizing part of claim 1 expresses that the three options mentioned are tried out until at least one cause has been determined. So it can be that the cause is already determined after the first test; It could just as well be that the cause was only discovered after the last test is found. According to the invention, the order of the test is basically arbitrary, even if there is actually a preferred order, which will be explained further below.

Im Ergebnis verkürzt das erfindungsgemäße Verfahren somit erheblich die Fehlersuche, falls es zu einem Fehlstart des Heizkessels kommen sollte, da direkt angezeigt wird, ob die Ursache an einem fehlenden Zündfunken, an einer defekten Ionisationselektrode oder an fehlendem Brennstoff liegt.As a result, the method according to the invention considerably shortens the troubleshooting process if the boiler starts incorrectly, since it is displayed directly whether the cause is a missing ignition spark, a defective ionization electrode or a lack of fuel.

Sollte keiner der drei vorgenannten Fehlerursachen detektierbar sein, wird, wie bisher auch schon, einfach ein Signal mit der Information erzeugt, dass ein unbekannter Fehler vorliegt.If none of the three aforementioned causes of error can be detected, a signal with the information that an unknown error is present is simply generated, as has already been the case.

Nochmals mit anderen Worten ausgedrückt, ist somit vorgesehen, dass maximal drei Tests zur Bestimmung der Ursache der Fehlzündung am Brenner vorgesehen sind, und zwar wird bei Feststellung eines fehlenden Ionisationssignals und einer fehlenden Spannungsänderung zwischen der Zündelektrode und dem Brenner während der Zündphase ein Signal mit der Information erzeugt, dass kein Zündfunke erzeugt wurde, und es wird bei Feststellung eines fehlenden Ionisationssignals während der Zündphase und eines Temperaturanstiegs des Heizkessels nach der Zündphase ein Signal mit der Information erzeugt, dass die Ionisationselektrode defekt ist, und es wird bei Feststellung eines fehlenden Ionisationssignals und eines fehlenden Luft-Massenstromeinbruchs während der Zündphase ein Signal mit der Information erzeugt, dass dem Brenner kein Brennstoff zugeführt wurde, wobei diese drei Tests in beliebiger Reihenfolge durchgeführt werden und die verbliebenen der drei Tests nicht mehr durchgeführt werden, sobald einer der Tests die Ursache der Fehlzündung ermittelt.In other words, it is provided that a maximum of three tests are provided to determine the cause of the misfire on the burner, namely if a missing ionization signal and a missing voltage change between the ignition electrode and the burner are detected during the ignition phase, a signal with the Information is generated that no ignition spark has been generated, and if a missing ionization signal is detected during the ignition phase and a temperature rise of the boiler after the ignition phase, a signal is generated with the information that the ionization electrode is defective, and if a missing ionization signal and If the air mass flow rate is missing during the ignition phase, a signal is generated with the information that no fuel has been supplied to the burner, these three tests being carried out in any order and the remaining of the three tests not more should be done once any of the tests determine the cause of the misfire.

Andere vorteilhafte Weiterbildungen des erfindungsgemäßen Verfahrens ergeben sich aus den abhängigen Patentansprüchen.Other advantageous developments of the method according to the invention emerge from the dependent claims.

Das erfindungsgemäße Verfahren einschließlich seiner vorteilhaften Weiterbildungen gemäß der abhängigen Patentansprüche wird nachfolgend anhand einiger Abbildungen genauer erläutert.The method according to the invention including its advantageous developments according to the dependent claims is explained in more detail below with the aid of a few figures.

Es zeigt

Figur 1
schematisch den Brenner eines Heizkessels mit Gemischzufuhr, Zündelektrode und Ionisationselektrode;
Figur 2
als Diagramm vier Signalverläufe, wobei bei den ersten dreien aus verschiedenen Gründen kein Ionisationssignal vorliegt und der vierte Verlauf einen ordnungsgemäßen Brennerstart darstellt.
It shows
Figure 1
schematically the burner of a heating boiler with mixture supply, ignition electrode and ionization electrode;
Figure 2
four signal curves as a diagram, with the first three not having an ionization signal for various reasons and the fourth curve representing a proper burner start.

Das erfindungsgemäße Verfahren wird nachfolgend anhand der beiden Figuren näher erläutert:
Wie bereits erwähnt (siehe hierzu Figur 1), dient bei dem Verfahren zur Bestimmung der Ursache einer Fehlzündung am Brenner eines Heizkessels in an sich bekannter Weise der Brenner 1 zur Verbrennung eines Gemisches aus einem gasförmigen oder flüssigen Brennstoff und Luft, eine Zündelektrode 2 zur Entzündung des Gemisches während einer Zündphase und eine Ionisationselektrode 3 zur Überwachung der Verbrennung des Gemischs. Dabei wird mindestens während der Zündphase außerdem eine Temperatur des Heizkessels, ein zum Brenner 1 strömender Luft-Massenstrom, eine Spannungsversorgung der Zündelektrode 2 und ein Ionisationssignal der Ionisationselektrode 3 überwacht.The method according to the invention is explained in more detail below with reference to the two figures:
As already mentioned (see Figure 1 ), is used in the method for determining the cause of a misfire on the burner of a boiler in a known manner, the burner 1 for burning a mixture of a gaseous or liquid fuel and air, an ignition electrode 2 for igniting the mixture during an ignition phase and an ionization electrode 3 to monitor the combustion of the mixture. At least during the ignition phase, a temperature of the boiler, an air mass flow flowing to the burner 1, a voltage supply of the ignition electrode 2 and an ionization signal of the ionization electrode 3 are monitored.

Wie aus Figur 1 ersichtlich, wird weiterhin in an sich bekannter Weise der zum Brenner 1 strömende Luft-Massenstrom mit einem Massenstromsensor 4 gemessen und das Gemisch aus Brennstoff und Luft mit einem Gebläse 5 zum Brenner 1 gefördert.How out Figure 1 As can be seen, the air mass flow flowing to the burner 1 is also measured in a manner known per se with a mass flow sensor 4 and the mixture of fuel and air is conveyed to the burner 1 with a fan 5.

Wesentlich für das erfindungsgemäße Verfahren ist nun, dass bei Feststellung eines fehlenden Ionisationssignals und einer fehlenden Spannungsänderung zwischen der Zündelektrode 2 und dem Brenner 1 während der Zündphase ein Signal mit der Information erzeugt wird, dass kein Zündfunke erzeugt wurde, und/oder dass bei Feststellung eines fehlenden Ionisationssignals während der Zündphase und eines Temperaturanstiegs des Heizkessels nach der Zündphase ein Signal mit der Information erzeugt wird, dass die Ionisationselektrode 3 defekt ist, und/oder dass bei Feststellung eines fehlenden Ionisationssignals und eines fehlenden Luft-Massenstromeinbruchs während der Zündphase ein Signal mit der Information erzeugt wird, dass dem Brenner 1 kein Brennstoff zugeführt wurde.It is now essential for the method according to the invention that if a missing ionization signal and a missing voltage change between the ignition electrode 2 and the burner 1 are detected during the ignition phase, a signal is generated with the information that no ignition spark has been generated and / or that if one is detected missing ionization signal during the ignition phase and a temperature rise of the boiler after the ignition phase, a signal is generated with the information that the ionization electrode 3 is defective, and / or that if a missing ionization signal and a missing air mass flow drop during the ignition phase is detected, a signal with the Information is generated that the burner 1 no fuel was supplied.

In Figur 2 ist diese Verfahrensweise nochmals bildlich dargestellt:
Wie ersichtlich, ist im Zeitabschnitt A insbesondere keine Spannungsänderung zwischen der Zündelektrode 2 und dem Brenner 1 feststellbar. Dies deutet darauf hin, dass die Ursache der Fehlzündung ein fehlender Zündfunke ist.In Figure 2 this procedure is illustrated again:
As can be seen, in the time segment A, in particular, no voltage change can be detected between the ignition electrode 2 and the burner 1. This suggests that the cause of the misfire is a missing spark.

Wie ferner ersichtlich, ist im Zeitabschnitt B insbesondere ein Temperaturanstieg des Heizkessels feststellbar, was bei fehlendem Ionisationssignal darauf hindeutet, dass die Ursache der - in diesem Fall angeblichen - Fehlzündung eine defekte Ionisationselektrode 3 ist.As can also be seen, in time segment B, in particular, a temperature rise of the boiler can be determined, which is the case with lack of ionization signal indicates that the cause of the - in this case alleged - misfire is a defective ionization electrode 3.

Wie außerdem ersichtlich, ist im Zeitabschnitt C insbesondere kein Luft-Massenstromeinbruch feststellbar. Dies deutet bei vorhandener Zündspannung darauf hin, dass dem Brenner 1 kein Brennstoff (Öl oder Gas) zugeführt wurde, und zwar deshalb, weil die Zündung des Gemisches ansonsten gewissermaßen einen Rückschlag in der Zufuhrleitung der Luft und damit einen kurzen Signaleinbruch am Massenstromsensor 4 verursacht hätte.As can also be seen, in time segment C in particular no air mass flow collapse can be detected. If the ignition voltage is present, this indicates that no fuel (oil or gas) was fed to the burner 1, namely because the ignition of the mixture would otherwise have caused a kickback in the air feed line and thus a brief signal drop at the mass flow sensor 4 .

Im Zeitabschnitt D ist schließlich zum Vergleich ein ordnungsgemäßer Brennerstart dargestellt, bei dem dann auch das Ionisationssignal in typischer Weise ansteigt.In time segment D, a proper burner start is finally shown for comparison, during which the ionization signal then also rises in a typical manner.

Um die konkret ermittelten Messwerte gut vergleichen zu können, ist dabei insgesamt besonders bevorzugt vorgesehen, dass beim Einschalten des Heizkessels Referenzwerte ermittelt und abgespeichert werden, die dann bei der Bestimmung der Ursache einer Fehlzündung verwendet werden.In order to be able to compare the specifically determined measured values, it is particularly preferable overall that when the boiler is switched on, reference values are determined and stored, which are then used to determine the cause of a misfire.

Weiterhin ist bevorzugt vorgesehen, dass die Feststellung eines Fehlers von einer Recheneinheit eines Reglers des Heizkessels getroffen wird.Furthermore, it is preferably provided that the determination of an error is made by a computing unit of a controller of the heating boiler.

Darüber hinaus ist bevorzugt vorgesehen, dass das Signal auf einer Anzeige eines Reglers des Heizkessels angezeigt oder zur weiteren Verwendung per Datenübertragung an eine andere Recheneinheit weitergegeben wird.In addition, it is preferably provided that the signal is displayed on a display of a controller of the heating boiler or is passed on to another processing unit for further use via data transmission.

Schließlich ist besonders bevorzugt vorgesehen, dass bei Feststellung eines fehlenden Ionisationssignals und bei Abwesenheit der drei anderen vorgenannten Fehler ein Signal mit der Information erzeugt wird, dass ein unbekannter Fehler vorliegt, sprich, es wird wieder ein Signal "Fehler EE" erzeugt. Dieses Signal wird aber wesentlich weniger als beim bekannten Stand der Technik angezeigt werden, da ein Großteil der Fehler unter die genannten drei fällt, die nunmehr erfindungsgemäß detektierbar sind.Finally, it is particularly preferably provided that if a missing ionization signal is detected and the three other aforementioned errors are absent, a signal is generated with the information that an unknown error is present, that is, a "Error EE" signal is generated again. However, this signal will be displayed significantly less than in the known prior art, since a large part of the errors fall under the three named, which can now be detected according to the invention.

BezugszeichenlisteList of reference symbols

11
Brennerburner
22
ZündelektrodeIgnition electrode
33
IonisationselektrodeIonization electrode
44th
MassenstromsensorMass flow sensor
55
Gebläsefan

Claims (5)

  1. A method for determining the cause of an ignition failure at the burner of a boiler, the burner (1) being used to burn a mixture of a gaseous or liquid fuel and air, an ignition electrode (2) being used to ignite the mixture during an ignition phase, and an ionization electrode (3) being used to monitor the combustion of the mixture, and, at least during the ignition phase, a temperature of the boiler, an air mass flow flowing to the burner (1), a voltage supply of the ignition electrode (2) and an ionization signal of the ionization electrode (3) also being monitored, characterized in that
    if it is found that there is no ionization signal and no change in voltage between the ignition electrode (2) and the burner (1) during the ignition phase, a signal is generated with the information that no ignition spark has been generated, and
    if it is found that there is no ionization signal during the ignition phase and there is a rise in the temperature of the boiler after the ignition phase, a signal is generated with the information that the ionization electrode (3) is defective, and
    if it is found that there is no ionization signal and no drop in the air mass flow during the ignition phase, a signal is generated with the information that no fuel has been supplied to the burner (1),
    wherein the order of the testing is in principle arbitrary and wherein the three said options are tried until at least one cause is determined.
  2. The method according to claim 1,
    characterized in that
    when the boiler is switched on, reference values are determined and stored, which are then used during the determination of the cause of an ignition failure.
  3. The method according to claim 1 or 2,
    characterized in that
    a fault is identified by a computing unit of a controller of the boiler.
  4. The method according to any one of claims 1 to 3, characterized in that
    the signal is displayed on a display of a controller of the boiler or forwarded to another computing unit by data transmission.
  5. The method according to any one of claims 1 to 4, characterized in that
    if it is found that there is no ionization signal and in the absence of the said other three faults, a signal is generated with the information that there is an unknown fault.
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DE102020107735A1 (en) * 2020-03-20 2021-09-23 Viessmann Werke Gmbh & Co Kg Method for operating a burner device

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