Loading ...
Sorry, an error occurred while loading the content.

Re: [BUG] Re: aren't electrical problems fun.

Expand Messages
  • Charles Martin
    From my limited experience, the circuit relies on the impedence of water. There is no float or other switch. While I have not gotten my Bunn working, the
    Message 1 of 7 , Feb 28, 2011
    • 0 Attachment
      From my limited experience, the circuit relies on the impedence of water. There is no float or other switch. While I have not gotten my Bunn working, the refill circuit does work. And the probe just sticks down into the water. I'm reasonably certain that it is always in contact with water, and that the circuit measures how much of it is in contact with the water. Or something like that.

      My Bunn is also stalled by electrical problems, which I haven't had the heart to follow-up on yet. I have 2 Bunns, so I have done things like swap the dose switch panels, cables, even the black box. So far I have not gotten it to make coffee. I could be close, but I can't tell. The worrisome thing for me is that the two black boxes cause different behavior. With one, the group solenoid does nothing, with the other it is always on when the power is on. Sheesh.

      Chuck Martin
      Decatur, GA

      On Feb 28, 2011, at 4:37 PM, Tex wrote:

      > I doubt that test will do anything for you Jack, since the refill circuit is grounded on one leg and goes through the probe for the other. This is where the bleepin' Alzheimer's shows up - I can't recall whether the refill circuit is always hot and the plunger's lifted until the water drops below the probe, or vice versa. Someone will know.
    • Tex
      The auto refill circuit relies on the probes contact with water to complete the circuit. That s why you can ground the probes lead to the boiler and fill the
      Message 2 of 7 , Feb 28, 2011
      • 0 Attachment
        The auto refill circuit relies on the probes contact with water to complete the circuit. That's why you can ground the probes lead to the boiler and fill the boiler for descaling.

        You raise or lower the probes depth to manage how much steam volume you have; all the way in gives you lots of steam, but reduces the water volume - it depends on how much hot water you use. I keep my probe high because I use the water in the boiler to fill vac pots and French presses, plus the wife uses it for tea and cooking.

        Tex

        --- In BUG-is-Bunn@yahoogroups.com, Charles Martin <clmartin@...> wrote:
        >
        > From my limited experience, the circuit relies on the impedence of water. There is no float or other switch. While I have not gotten my Bunn working, the refill circuit does work. And the probe just sticks down into the water. I'm reasonably certain that it is always in contact with water, and that the circuit measures how much of it is in contact with the water. Or something like that.
        >
        > My Bunn is also stalled by electrical problems, which I haven't had the heart to follow-up on yet. I have 2 Bunns, so I have done things like swap the dose switch panels, cables, even the black box. So far I have not gotten it to make coffee. I could be close, but I can't tell. The worrisome thing for me is that the two black boxes cause different behavior. With one, the group solenoid does nothing, with the other it is always on when the power is on. Sheesh.
        >
        > Chuck Martin
        > Decatur, GA
        >
        > On Feb 28, 2011, at 4:37 PM, Tex wrote:
        >
        > > I doubt that test will do anything for you Jack, since the refill circuit is grounded on one leg and goes through the probe for the other. This is where the bleepin' Alzheimer's shows up - I can't recall whether the refill circuit is always hot and the plunger's lifted until the water drops below the probe, or vice versa. Someone will know.
        >
      • Bob White
        The refill solenoid is normally closed (no power applied) and is open power applied. My experience was from my refill solenoid being always open so I put a
        Message 3 of 7 , Feb 28, 2011
        • 0 Attachment
          The refill solenoid is normally closed (no power applied) and is open
          power applied.

          My experience was from my refill solenoid being always open so I put a
          switch in the circuit so the tank won't refill when pulling shots.
          Some board problem not addressed yet but it worked for me.

          Good luck.

          On Feb 28, 2011, at 4:37 PM, Tex wrote:

          > I doubt that test will do anything for you Jack, since the refill
          > circuit is grounded on one leg and goes through the probe for the
          > other. This is where the bleepin' Alzheimer's shows up - I can't
          > recall whether the refill circuit is always hot and the plunger's
          > lifted until the water drops below the probe, or vice versa. Someone
          > will know.
          >
          > Tex
          >
          > --- In BUG-is-Bunn@yahoogroups.com, "jack_burien" <jack_burien@...>
          > wrote:
          > >
          > > In that there is no water in the boiler, I'll assume that the
          > probe is working correctly. But just to be sure, I'm going to pull
          > the probe and put it into a glass of water and then check the
          > voltage on the solenoid. Thanks for the info and links....will
          > report results...jack in fl :-)
          > >
          > > --- In BUG-is-Bunn@yahoogroups.com, "Tex" <Texas_Coffee@> wrote:
          > > >
          > > > Howdy Jack,
          > > > The refill solenoid should only be hot when the water level in
          > the boiler drops below the probe tip. Check the probe connection for
          > clean metal (corrosion is a big & common problem).
          > > >
          > > > Look in >Links >Repair services; there are two PC board repair
          > shops listed.
          > > >
          > > > Tex
          > > >
          > > > --- In BUG-is-Bunn@yahoogroups.com, "jack_burien" <jack_burien@>
          > wrote:
          > > > >
          > > > > The reset on the pump will not work, and the pilot lot flashes
          > faster when I try the reset procedure with the switch in program
          > mode. Any ideas? Is there anyone who repairs these control boards?
          > Should the fill solenoid have 120 volts on it at all times? Just
          > trying to trouble shoot this problem...jack in fl :-)
          > > > >
          > > >
          > >
          >
          >
          >



          [Non-text portions of this message have been removed]
        Your message has been successfully submitted and would be delivered to recipients shortly.