Okey...okey...I've had a breakthrough! I've mended my machine and just pulled a shot, something I haven't been able to do in about 2 years. I'm so excited to be drinking an espresso at midnight (my local time). Haha!
So here's the solution to my problems I've been facing:
The white wire to the grinder I thought had a good connection, turns out I had a hunch it wasn't all that great so I re-terminated it. I also fixed a naked ground wire (put some shrinking tube over it) and made sure the connection was good. I also cable managed everything so it was snug behind the PCB tray.
Now my machine is fixed and I'm as happy as can be.
Hope this will help someone else that has an PCB issue.
Cheers
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BES860 Solenoid assy problems and machine shutting down
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You are an absolute legend! Thank you for that information. I don't know how old my machine is but it was bought brand new from Australia in 2012. It would be a bit difficult for me to specify the exact date of purchase but I can't find any information on the unit that states it's manufacturing year and month and so on. Is there a way?
So with the info you've given me, is there another wire for the thermocoil on the 870 then, such a wire for the thermostat that the 860 doesn't have? Because on my unit it has no where to connect, since my thermocoil works fine the way I connected everything, it's heating up as it should. I'm starting to wonder if the grinder needs to have ground via the backplate of the PCB housing since there is a ground wire going from it's metal backplate to the common grounding point on the machine? And if I might have issues there and it not touching/making contact enough. Why I mention this is because the new housing for the PCB I got with the card is not really a secure fit, only when I screw it in it's secured. Need to have a look at that and my cable management I guess (sorry for just rambling on here).
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Just checked an 870 that is on the bench. From your diagram:Originally posted by Kerim View PostThat’s the thing. There is already a black wire corresponding to the grinder. I compared the two boards and switch one wire at a time. So there now is a second (or third if you will) black wire on the board that is the one without a possible connection. I’ll post a picture to try and make it clearer
On this image that is attached you can find there are three black wires. 1 goes to the power cord. 2 goes to the grinder. 3 is just hanging in there.
Wire 1 goes to neutral in.
Wire 2 goes to grinder black wire
Wire 3 goes to thermocoil thermostat black wire
I compared that to an 860, the thermocoil neutral wire is blue and is connected along with the neutrals for the pump and solenoids. I don't know what differences on a board level they made between the 860 and 870 for this. The 860 I'm looking at is very old, if you had a late model 860 they may have already changed some wire colours or connections.
I don't see how any of this would stop your grinder from working though.
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That’s the thing. There is already a black wire corresponding to the grinder. I compared the two boards and switch one wire at a time. So there now is a second (or third if you will) black wire on the board that is the one without a possible connection. I’ll post a picture to try and make it clearer
On this image that is attached you can find there are three black wires. 1 goes to the power cord. 2 goes to the grinder. 3 is just hanging in there.
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The grinder motor uses a white and black wire. Would make sense seeing as your grinder isn't working.
I'm surprised the board is working as well as it is so far, you must have got lucky and had a late model front panel in your machine, they changed connectors in them a few times over the years requiring a different circuit board each time.
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Hello again!
So a small update but still looking for some advice. I've managed to swap the new PCB from a BES870 into my 860 99% successfully. The only hiccup I have is one black cable that the 860 doesn't have so there is no where to connect it and also when I try to grind beans (just try the grinder) the indicator on the front blinks as it should but the grinder is not activated. I've looked over all of my connections and they are solid and good (not soldered but terminated and protected from moisture and such). So my question is basically: where does this black cable go on the 870 and what could I have done wrong so that the grinder is not activated?
The steam wand works fine and there is water to the group head without any issues like before (machine shutting down randomly when under load like grinding or brewing) and coil is heating up.
Please help me =)
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So, after many months of waiting and searching I sourced a new PCB from AUS for the BES870. The very reputable sales person on Ebay said it would work on my BES860. So here to giving it my last effort before I have to sell it in parts haha!
Will keep you posted. It should arrive late feb beginning of march.
Cheers
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Thank you for your interest. I still haven’t found a ”new” board. I will keep you posted if I do and get it working. I don’t think a model with different features will work too good, as far as I know the 870 has a hot water outlet that id the main differens. It is ”just” a different mechanical valve you open to let the water come thru but I think the rest of the machine will have a hard time knowing what to do. I mean it could work but I have my doubts.
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Hope you're able to source a board! PCB failure is what took out my well-used BES840 and I never managed to track one down.
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I'm interested how this will go! I don't think the original PCB is sold anymore, but maybe a newer PCB (870, 875) might work? Or did you manage to salvage a new one?
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Just to follow up on this issue I’m currently sourcing a “new” PCB. Wish me luck
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I believe so too. It has to be the control board. Not a wizard with control boards and the components but my brother could help me out. Just need to figure out which component needs to be replaced.
My solenoids are brand new yes. The 2-way solenoid is not getting any power it seems, it buzzes but it doesn’t give me any read out on any voltage, that could def. be user error though so I will keep troubleshoot. The 3-way solenoid gives me 30-78V when it buzzes. After that the machine turns off. I don’t have your problem of the water just running thru to the group head right away.
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