Kirjoittanut: swiss_guy« : eilen kello 19:14 »i measured again
PIC Pin 26 5.1v - 5.4v (while igntion is active) PIC Pin 27 0v JP2 Pin 3 12.8v - 13.0v constant (while igntion is active) JP2 Pin 4 12.4v - 1sec 12.8v, then 12.5v (while igntion is active) Kirjoittanut: swiss_guy« : eilen kello 15:07 »The Voltage starts from 0V to the measured values when i hear the click in the gas switch. After a few seconds (need to count exactly) i would say, 3-5secs, the voltage decreases within 1sec back to 0v.
The ignititor is good to hear after the gas switch "clacking sound", its a very silent frequently pulsing sound (ca 3-4secs) To your question: Do you see voltage on JP2/pin2 simultaneously with ignition "buzz"? >>>> i need to verify this tonight, i feel like it is the same time, but not 100% sure. Kirjoittanut: Mjerica« : eilen kello 14:06 »@Patrick:
"PIC Pin 26 IC1 right side Drives control transistor (Q22 path)" "PIC Pin 27 IC1 right side Drives control transistor (Q1 path)" -Q22? Q1? Have you measured something of Q22/Q1? @Patrick: "PIC Pin 26 - 5.1v - 5.4v PIC Pin 27 - 0v JP2 Pin 3 - 12.8v JP2 Pin 4 - 12.4v" - Do you mean these voltages kept these levels (all the way during starting sequence) without changes? I expected some rapid transitions. How would you descripe the behaviour of valve unit LEDs during starting sequence? I mean, as precisily as possible and also time referenced to ignition "buzz" (I understand you recognized ignition by its sound?) Do you see voltage on JP2/pin2 simultaneously with ignition "buzz"? Kirjoittanut: swiss_guy« : eilen kello 12:33 »Good day everyone Kirjoittanut: swiss_guy« : 6.04.2026 kello on 12:20 »Good day everyone
I have resolved the battery issues, now i have better and constant current. I measured again durring the startphase: PIC Pin 26 - 5.1v - 5.4v PIC Pin 27 - 0v JP2 Pin 3 - 12.8v JP2 Pin 4 - 12.4v Still the same situation, it tries to start, and goes to error on the controller (as in the video). Any ideas? Thank you and have a good day Kirjoittanut: swiss_guy« : 4.04.2026 kello on 12:45 »dear community, sorry for my late response, needed to find the easter eggs
 JP2 Pin 3 Right connector 2kW heating control - 11.5V JP2 Pin 4 Right connector 4kW heating control - 11.5V i tested it via land power, and battery power. i have now a suspect on my aftermarket Victron Blue Charger which i run in a combination with a Voltic 35Ah LIFEPO Battery. the Pins PIC Pin 26 IC1 right side Drives control transistor (Q22 path) PIC Pin 27 IC1 right side Drives control transistor (Q1 path) i have not yet measured since i dont have so small tips at my hand, need to organize those before. thank you and happy easters Kirjoittanut: Mjerica« : 2.04.2026 kello on 16:03 »@Patrick: "i will try to measure the PCB-Board Pins 26, 27, and JP2 pin 4,3 tonight"
- We must expect rapid changes in these signals, probably beyound human reception, but hopefully we get something usefull. Digital storage oscilloscope would be the king. Anyway, be carefull when touching MCU:s pins, it is easy to make unrepairable damage. /*Laitan tähän suomeksi hieman vaikutelmia tästä tapauksesta siltä varalta että joku saattaisi huomata jotain oleellista vaikka ei muutoin olisikaan kiinnostunut seuraamaan englanninkielistä ketjua. Itse en ehkä ehdi suuremmin tietokoneen ääreen "päästäisen hulinan&voimienkeruun" aikana. Oheisessa videotallenteessa kuvittelen näkeväni että polttimen käynnistys alkaa normaalin oloisesti aina siihen saakka kunnes on aika avata kaasuventtiileitä, (pääventtiili+4kW teho + sytytys). 4kW teho:n pitosignaalista kertoo kaksi ylintä LED:iä mutta ne räpsähtävät vain lyhyesti samalla kun arvelen kuulevani ainakin jonkin venttiilin vetävän. Eli ainakin yksi venttiilin vetosignaali olisi todennettu. Ilmeisesti vain mittaus kertonee saadaanko useampia. Joka tapauksessa nyt kun hälytysmerkkivalo on saatu toimimaan niin se kertoo että tapahtuu siirtyminen häiriötilaan, tuohan sotki aluksi päättelyä pahanpäiväisesti. Olisi hyvä jos joku muukin tarkistaisi mitä näkee tuolla videolla, näkeekö saman mitä minä olen näkevinäni joka siis poikkeaa hieman siitä mitä aloittaja kertoo tilanteesta. Voisiko videotoistin tehdä jotain tällaista? Päättelen niin että 4kW teho:n pitosignaalin katoaminen on niin nopea ettei syynä voisi olla tieto liekinseurannasta vaan tapahtuu jokin suora sisäinen reaktio, esim. jännitteen notkahdus vetokelojen kuorman aiheuttamana. Miten sitten todentaa noin nopeita tapahtumia yleismittarilla.... . ehkä täytyy keksiä jotain. Aloittaja on nyt ilmeisesti mitannut lämpöanturilta vastuksen 27.4kohm joka rinnakkaiskuormanki n kanssa on varsin korkea mutta kun polttimen käynnistyssekvenssi epäonnistuu niin se pitänee selvittää ensin.*/ Kirjoittanut: mjo33400« : 2.04.2026 kello on 11:43 »@mjo33400, thank you for this advice, i will check this when i get back home. Just to be sure, you are speaking about the 3 LED on the Gas Switch module? Kind regards, Patrick Kyllä puhun. Kirjoittanut: swiss_guy« : 2.04.2026 kello on 11:37 »@Mjerica
thank you for your answer, i just measured the correct resistor, and its 27.4 k Ohm. i will try to measure the PCB-Board Pins 26, 27, and JP2 pin 4,3 tonight. The video i posted, is the exact problem situation, its every time the same behavior. Kirjoittanut: Mjerica« : 2.04.2026 kello on 04:30 »Patrick, in this picture you are measuring between wrong points.
(75k&47k connected to U2 pin 7) In the picture, the temperature sensor RT1 is just behind your plusprobe tip. "i realized the red diode on the control panel was no more soldered correctly to the controller board" - Now this begins to make sense, we were dealing with two independent faults. That is often confusing. One fault left.... for now on, everything should become more straightforward. - Let's leave MCU pins 6,7,8,18 for a moment, we'll come back to these later if necessary. @Patrick: "I hear the blower turns on, after 15sec the gas switch opens (on the gas switch for a short time the 3rd led is active, then only the 2 top leds are active > see attached picture), the ignitor is active for 2-3 secs, then the blower starts to turn faster and nothing happens" In the video, what I saw, (or I believe I saw), it looks like no valve LED on until in the final moment of ignition. And then, only very short flash simultaneously with (main?)valve opening sound followed by shutdown to the alarm state. Do you see/hear something different? My (kind of) impression is that valve activation makes supply voltage to drop abruptly and causes shutdown and terminates the starting sequence. Some other explanations are possible though. I will check the video some more time tomorrow. It would be interesting know how voltages behave in (main controller PCB) PIC16C62A pins 26, 27 and connector JP2 pins 4, 3 respectively in starting sequense. But these needs very carefull handling of probes not to make damaging short circuits. |
