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Thread: Behmor 1600 Losing power

  1. #1
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    Behmor 1600 Losing power

    My last two roasts have had the Behmor 1600 lose power mid roast. There are no error messages, no over temperature and no loss of power.

    Both times I have been able to hit cool and have the fan, drum and screen turn on. The second time however it lost power mid cool. Powering off/on and hitting cool again had it complete.

    How sensitive are these machines to low voltage? Its now about 30 minutes later and I've measured the voltage at the plug to be 247Vac but it may have been lower with everyone using AC earlier.

    The 2 electrolytic caps look fine and are 105C rated but that is about the only other thing I can think of.
    I did change to an upgraded panel about a year ago so I can try using the old one to see if it reoccurs.
    I think I will pull the main board out and make sure nothing has fouled the back like a dead critter or coffee gunk.

    If anyone has any ideas or has had one fail like this I'd love to hear from you.

    Cheers,
    David

  2. #2
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    Mine did this on my last roast. I couldn't get it to complete the roast actually, cycling the power did nothing. It'd die 6-7 minutes into a roast. I figure a fan has gone in it and it's overheating. Though there's no error messages or similar. Is there usually a message for overheating?

    I'll be pulling it apart this weekend. I've also got a spare metric panel for it that I never installed, so while I am at it, I'll do that. Hopefully I remember to report back

  3. #3
    Senior Member flynnaus's Avatar
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  4. #4
    CoffeeSnobs Owner Andy's Avatar
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    I see both these roasters are quite old (4-5 years) but we don't see many errors even on very old roasters and even less problems without an identifying error code on the screen.

    Electrical components are likely as it's a torturous environment for electronics. If your fans are suss or dirty then the side circuit board and front panel electronics will have been in higher heat over a period of time.

    How sensitive to low voltage? Not very. Roasts take a lot longer but the machine doesn't care much.

    Swapping out the front panel to remove half the electronics makes sense, if it still has a problem then a component on the side circuit board covers pretty much the other half of the electronics in there.

    Worth taking good note of when it happens too, repeatably always helps troubleshooting.

  5. #5
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    That's funny you should mention this. I just had exactly the same problem recently when I bought a second hand Behmor 1600.
    I paid $100, which I thought was a decent price, however when I got it home it would only run for a minute or so before powering down without any warning.
    It was too far to try and get my money back so I opened it up to see if it was repairable, I did some testing and found the regulated 5 V supply to the control board was regularly dipping below 5 V before dropping out altogether. I initially replaced the LM7805 voltage regulator but it was still dropping out. I then checked the unregulated 12V supply from the bridge rectifier and found that was also faulty. After replacing both components I have run a couple of full roast/cool cycles without any problems.
    I am still annoyed that I was given a faulty unit, but for $100 + $4 worth of components I can't complain too much.

  6. #6
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    Quote Originally Posted by excee View Post
    I then checked the unregulated 12V supply from the bridge rectifier and found that was also faulty.
    Thank you so much! I had checked the bridge rectifier cold (all 8 ways) and it looked ok. I just checked it with a hair dryer pointed at it, 30s later one diode went open circuit. Now that its cool again its working. I also reflowed it to make sure it wasn't a dry joint but it still goes bad with heat/
    Once again thanks!

    I'll check the long fan at the bottom for lubrication too but I know the others are OK.

  7. #7
    Senior Member CafeLotta's Avatar
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    Quote Originally Posted by Andy View Post
    Swapping out the front panel to remove half the electronics makes sense, if it still has a problem then a component on the side circuit board covers pretty much the other half of the electronics in there.
    Installing the upgraded front panel solved a frustrating problem in my Behmor. It had gone from roasting to baking beans after 40-50 roasts. Changed out the side panel and sensors with no result. Fans were always kept clean and were working. After 3 years on the sidelines gathering dust I finally decided to try the upgraded front panel which instantly got it roasting again. Maybe additional heat insulation and fans are required?
    Last edited by CafeLotta; 4 Weeks Ago at 05:49 PM.

  8. #8
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    Replaced the panel (what a nightmare) and now I am getting Error 5. Which is the DC fan. I've given it a good clean, too, but looks like the fan is dead. Anyone know where to order a replacement?

  9. #9
    Senior Member Barry O'Speedwagon's Avatar
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    Quote Originally Posted by RecR View Post
    Replaced the panel (what a nightmare) and now I am getting Error 5. Which is the DC fan. I've given it a good clean, too, but looks like the fan is dead. Anyone know where to order a replacement?
    Ummmm......you could try Andy (the proprietor of this site)?

    But best to check with him and/or Behmor tech support first.
    Andy likes this.

  10. #10
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    Hi RecR, mines just come up with error 5 today as well. What's the plan of attack?

  11. #11
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    Behmor Coffee Roaster
    Not sure at this stage, need to source a fan from somewhere but they don't look easily available. I need to find the time to send emails to the right places. Either way, looks like it's gonna be an annoying job to replace in the end (sourcing and removing/replacing).

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