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Topic: Alp overheated and shut down (8 msgs / 223 lines)
1) From: DeCambre.Peter
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2) From: DeCambre.Peter
I will be out of the office starting  11/26/2002 and will not return
until 12/02/2002.
I will respond to your message when I return.
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3) From: DeCambre.Peter
I will be out of the office starting  11/26/2002 and will not return
until 12/02/2002.
I will respond to your message when I return.
homeroast mailing listhttp://lists.sweetmarias.com/mailman/listinfo/homeroast

4) From: Michael Vanecek
My Alpenrost suddenly shut down - no lights or power - about 13 minutes 
into a roast tonight and it looks like it overheated. Lotsa smoke when I 
opened the lid. Does it have an over-heat shut-off "breaker" or 
something? Is it dead? It's only ten years old and has given me very 
reliable roasts up until tonight. I have a spare Alp that has never had 
a roast put thru it, so at least I'm still able to roast...
Be well,
Mike
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Zone 8, Texashttp://groups.yahoo.com/group/organichomesteading/http://www.naturalbeefarm.com/ Natural Beekeeping">http://www.taroandti.com/Exotic Plant Info and More...http://groups.yahoo.com/group/organichomesteading/http://www.naturalbeefarm.com/ Natural Beekeeping
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5) From: Michael Vanecek
I need to do an ohm test to be sure - but it may be the thermal fuse. I 
took the cover off - ten years of accumulated crud was pretty thick. 
Vacuuming helped a lot. They should have made things a little tighter in 
there. Anyway, no obvious damage. There's a thermal cut-off that's 
supposed to come back on after fifteen minutes, and a thermal fuse that 
outright fails. I'll have to replace that sucker. Craig, a then Swissmar 
tech, from another forum (found thru Google) recommended a SF152E1 fuse 
as a replacement - slightly higher temperature to failure. Anyone know 
where I can find one - Google wasn't much help. Everything else works so 
good - I could get another ten years out of this roaster and still have 
a fresh unused backup to carry me for another 20 years. That's an Alp 
for you - either they fail in the first year (my first one did), or keep 
chugging away after that.
Be well,
Mike
-- 
Zone 8, Texashttp://groups.yahoo.com/group/organichomesteading/http://www.naturalbeefarm.com/ Natural Beekeeping">http://www.taroandti.com/Exotic Plant Info and More...http://groups.yahoo.com/group/organichomesteading/http://www.naturalbeefarm.com/ Natural Beekeeping
On 11/06/2010 11:53 PM, Michael Vanecek wrote:
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6) From: Michael Vanecek
Has anyone replaced this fuse before? It looks like it comes as a 
diode-looking thing so I'll need to preserve the cladding and solder and 
insert the new diode-fuse back into it. Has anyone just shorted that out 
and bypassed the fuse altogether? I know it's a fire-hazard if it 
decided to overheat - but roasts shouldn't be left unattended anyway.
Be well,
Mike
-- 
Zone 8, Texashttp://groups.yahoo.com/group/organichomesteading/http://www.naturalbeefarm.com/ Natural Beekeeping">http://www.taroandti.com/Exotic Plant Info and More...http://groups.yahoo.com/group/organichomesteading/http://www.naturalbeefarm.com/ Natural Beekeeping
On 11/07/2010 09:00 AM, Michael Vanecek wrote:
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7) From: raymanowen
I hate to suggest that a machine that works well for 10 years is a toy- so I
won't. Instead I ask- "How much more do you want from it?"
Amortize the purchase price over the ten years and that's some inexpensive
roasting isn't it? The USRC would be less expensive over it's lifetime but
it roasts commercial quantities compared to the Alp's home use-thermal fuse
design. I have the fix for thermal fuses that disable your machine at the
Murphy Moment.
Look at the ampacity charts for Copper AWG wire. Properly sized wire will
limit current flow and it will melt, so it forms a re-calibrated thermal
fuse.
If you are serious about limiting the temperature below ~2000 F, use a
piece of plumber's 50:50 wire solder for the link. Most solder has similar
properties, but the 63:37 ratio, known as Eutectic solder has no plastic
range, and melts almost instantly at 180C or 360F.
Even a fat link will melt the same, and Big Brother will approve your
ingenious Dummkopf protection. It would melt on every second contiguous
roast. They'll love it.
Cheers, Mabuhay -RayO, aka Opa!
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8) From: Michael Dhabolt
Michael,
Any of the electronics parts houses should be able to provide the
replacement fuse you are looking for.  The Digikey link from Paul
should work for you.  Several years ago I found the thermal fuse
(probably a little different #) at a local Radio Shack.  A thorough
cleaning of the air flow path around the thermal fuse on a regular
basis (Semi-Annually maybe?) is a good idea - - dis-assembling the
machine to that level isn't all that difficult, now that you've done
it once.  This fuse is the classic cause of defunct Alps.
It's a good move, finding some of Craig's info., he is the Guru for
these machines.  There is quite a bit of info on Alp's in the Coffee
Geek archives and several other places, most of the good stuff came
from Craig.  IIRC there are a couple of circuit board mods from his
info that work out well.
The other question: Yes you can just wire around this fuse to check
out the machine .... definitely not recommended for other than
diagnostic testing, ideally with power from a short extension
including a GFI breaker.
Mike (just plain)
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