25 pdvc questions

Jason Knapp Posted By Jason Knapp, Dec 25, 2014 at 9:06 PM

  1. slvrblkk

    slvrblkk
    Minister of Fire 2.
    NULL
    

    Feb 2, 2008
    1,326
    174
    Loc:
    Northampton, PA
    I guess just for sh!ts and giggles you can try and put the board in "C" mode and see if it would by chance work.
     
  2. Chrisnow86

    Chrisnow86
    Minister of Fire 2.
    NULL
    

    Oct 13, 2014
    592
    148
    Loc:
    S. E. Massachusetts
    Sounds like the relay for the cycle times is shot.. Idk if a mode change would do anything..
     
  3. Harvey Schneider

    Harvey Schneider
    Minister of Fire 2.
    NULL
    

    Oct 9, 2012
    1,321
    322
    Loc:
    Southbury, CT
    There is no relay. The motor is controlled by a triac on the circuit board. The motor runs when in diagnostic mode but receives no power in run mode.
     
  4. Chrisnow86

    Chrisnow86
    Minister of Fire 2.
    NULL
    

    Oct 13, 2014
    592
    148
    Loc:
    S. E. Massachusetts
    Then what should he do? New control board? Sounds like his only option at this point... Idk about fixing it..
     
  5. slvrblkk

    slvrblkk
    Minister of Fire 2.
    NULL
    

    Feb 2, 2008
    1,326
    174
    Loc:
    Northampton, PA
    Probably, unless he is savy with a soldering iron.....
     
  6. Chrisnow86

    Chrisnow86
    Minister of Fire 2.
    NULL
    

    Oct 13, 2014
    592
    148
    Loc:
    S. E. Massachusetts
    I would need a few drinks in me to have the courage to complete that task!
     
    slvrblkk likes this.
  7. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    Can you explain what a triac is?
    For the $217, I may just get a new board, rather than chance a repair from someone on ebay.
    Before that, I'll go to "c" mode and see what happens. I won't run it in that mode, I'll use it to see if it straightens out.
     
  8. Harvey Schneider

    Harvey Schneider
    Minister of Fire 2.
    NULL
    

    Oct 9, 2012
    1,321
    322
    Loc:
    Southbury, CT
    A triac is a semiconductor switch. It gets switched on by a signal from the microcontroller on it's gate and stays on until the AC on its main terminals drop to near zero. It can be used to provide a proportion of the AC waveform for speed control or for simple switching. Light dimmers use triacs.
    The triac on your board is obviously working since diagnostic mode was able to turn it on and drive the motor.
    It still puzzles me that the motor runs in diagnostic mode but not in normal mode.
     
  9. slvrblkk

    slvrblkk
    Minister of Fire 2.
    NULL
    

    Feb 2, 2008
    1,326
    174
    Loc:
    Northampton, PA
    Can you take a close up pic of the whole board? If it's too much of a pain don't worry about it.
     
  10. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    I certainly can take a pic tomorrow. I got into the moonshine a little bit tonight. Walking to the garage may not be an option!
     
  11. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    I agree its strange......... I wish I knew why it's acting so strange. I'll tinker a bit more with it tomorrow. Maybe another reset will help. What gets me is, the room air blower comes on within 30 seconds of hitting the start button. The blower also doesnt seem to reach any faster speed than 3. Maybe the board took a hit from an electrical surge?
     
  12. Harvey Schneider

    Harvey Schneider
    Minister of Fire 2.
    NULL
    

    Oct 9, 2012
    1,321
    322
    Loc:
    Southbury, CT
    Try lifting the proof of fire thermocouple from the chassis. You might have a line voltage leak to the chassis that is driving the logic crazy.

    edit
    Don't do it until after your buzz wears off.
     
    Jason Knapp likes this.
  13. CladMaster

    CladMaster
    Minister of Fire 2.
    NULL
    

    Nov 20, 2012
    677
    119
    Loc:
    Maine
    Hmmm ! I have an idea, and it's a long shot !

    Remove the power from the stove.

    Take pictures of the back of the control board showing where all the wires are connected.

    Remove the control board from the stove.

    Check all the connectors to the control board. Pull them and reconnect.

    The digital display and buttons are on a separate board and are connected to the control board via a ribbon cable, check this too.

    Under this ribbon cable is a chip, it's not soldered to the board, it sits in a special holder so that it can be removed and replace with a different chip. Check that this chip is seated in it's holder, do not remove it from the holder, the pins on these chips can break if mis-handled.

    [​IMG]
     
  14. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    I'll do this today, sober... The thermocouple is the copper terminal that's fastened to the rear of the firebox, correct?
     
  15. slvrblkk

    slvrblkk
    Minister of Fire 2.
    NULL
    

    Feb 2, 2008
    1,326
    174
    Loc:
    Northampton, PA
    Correct.
     
  16. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    I'll do this too. Should I be looking for signs of corrosion? Obviously I'll check the board for any burn marks and terminal condition as well.
     
  17. slvrblkk

    slvrblkk
    Minister of Fire 2.
    NULL
    

    Feb 2, 2008
    1,326
    174
    Loc:
    Northampton, PA
    Here's the wiring diagram but with the hopper switch included. Probably wouldn't be a bad idea to double check and tract the wiring out.

    upload_2014-12-28_8-29-4.png
     
    Jason Knapp likes this.
  18. slvrblkk

    slvrblkk
    Minister of Fire 2.
    NULL
    

    Feb 2, 2008
    1,326
    174
    Loc:
    Northampton, PA
    The other thing....I know you checked continuity over the vac switch but jump the wires together and take the switch completely out of the equation........UNPLUG THE STOVE BEFORE DOING THIS THOUGH.......
     
  19. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    I did this yesterday. I then ran the stove but again, the upper auger motor wont move.
    THANK YOU SO MUCH for the diagram. This is the second stove that you have helped me with. I greatly appreciate it.
     
    slvrblkk likes this.
  20. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    Okay, another update. I did another board reset and tried running it in "c" mode. Still the same issue. I also removed the thermal sensor and it didn't help. I removed the board and took some pictures of it. I found corrosion on the ribbon plug. I have a suspicion that this may be my headache. I'll take the front off and see the extent of damage. I may try to gently clean everything and see where it gets me.
    Here are some pics, I wish the quality was better.
     

    Attached Files:

  21. slvrblkk

    slvrblkk
    Minister of Fire 2.
    NULL
    

    Feb 2, 2008
    1,326
    174
    Loc:
    Northampton, PA
    Is the thermostat jumper in place?
     
  22. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    Yes, the jumper is in place.
     
  23. stoveguy2esw

    stoveguy2esw
    Minister of Fire 2.
    NULL
    

    Nov 14, 2006
    6,186
    1,103
    Loc:
    madison hgts. va
    9 in 10 its in the chip for the board , the PROM chip is what controls the timing of the auger , the circuit (on the hardware side) appears to be intact, but the "run" mode timing is not present. you MAY be able to fix this with a replacement PROM chip instead of the whole board.

    locate the PROM, its the chip thats about an inch long 1/4 inch wide (ish) has a white sticker on it that says englands pu-cb04 rev(im thinking 13) on it. this chip can be removed and replaced, i'd try removing it and carefully reseating it to see if this makes it start to behave, IMPORTANT , make sure you orient the chip in the same position as it came out as it will "fit" backwards, locate the indexing mark, its a half circle cutout at one end of the chip, when you reinsert the chip that cutout needs to be at the same end it was or nothing will work right
     
  24. Jason Knapp

    Jason Knapp
    Burning Hunk 2.
    NULL
    

    Dec 11, 2012
    237
    57
    Loc:
    Poughkeepsie, NY
    Thanks for the response, Mike.
    Is the PROM chip available through you?
    I sent my board to another PDVC owner so he could try it on his stove. If he gets the same result then at least we narrowed it down.
     
  25. stoveguy2esw

    stoveguy2esw
    Minister of Fire 2.
    NULL
    

    Nov 14, 2006
    6,186
    1,103
    Loc:
    madison hgts. va
    yeah we have replacement prom chips, i suspect its the issue either its not seated cleanly or its faulty
     

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