HomeRoast Digest


Topic: Rosto problem (10 msgs / 285 lines)
1) From: Peter Barnes
I've been lurking around the lists for a while, and I seem to have 
developed a problem with my Cafe Rosto.  Wondering if anyone else has 
experienced this...
Roasted several (3) batches today, then let the roaster sit for an hour. 
  Started it back up to roast another batch (Xmas presents), and there 
was no heat.  I normally warm up the roaster a bit before adding the 
beans, but the air blowing out was cold air.
I roast indoors, 70 degrees, and from what I can tell the line voltage 
is a steady 116-118.
Does this problem go away, or is there something really wrong?
cheers
peter
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2) From: John Abbott
Peter,
	I don't think that's normal at all.  I'm wondering if you possibly have
chaff under the chaff basket that is blocking the air flow.  You might want
to invert the machine and give it a shake to see if you dislodge any chaff
that may have gotten into the unit.  The chaff basket on the one I used
didn't quite seal the opening and after about two roasts it needed vacuuming
out.  I'll bet "Rockin Rosto" McCoffee jumps in here and has a list of fine
detail soon.
John - enjoying an Iced Kona and 84 degree weather!!

3) From: Peter Barnes
Yeah, that's what I thought too, but there are only a few tiny clinging 
pieces of chaff down there, almost none at all.  I cleaned with a brush 
and shook it a bit too.

4) From: Paul Goelz
At 04:08 PM 12/17/02, you wrote:
<Snip>
I don't own a Rosto so I can't look to see.  But many heating devices like 
bathroom heaters have resettable thermal cutouts that have exposed 
contacts.  You might have triggered the cutout and then before the contact 
closed you got a piece of something between the contacts.  I have a 
bathroom heater that does that.... if the cutout triggers, it sometimes 
will not reset.
On the other hand, there may be a non-resettable cutout that triggered.
Time for a voltmeter.
Paul
Paul Goelz
Rochester Hills MI USA
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5) From: Peter Barnes
I just ran the Rosto through a full cycle, just to see if there was 
(ever) any change in temp.
Odd thing I noticed.  The temp. and fan noise remain consistent, even 
when entering cool down.  Normally, the fan noise picks up by a few 
decibels when it starts to cool down - it seems to be blowing more air 
through.
So now I think it is just broken.  There must be a mechanism that takes 
it from cool down to roast (or vice-versa) that isn't working.

6) From: R.N.Kyle
Hey Frank, welcome to the list, and the wonderful world of Home =
Roasting, sorry to hear your roaster died a quick death. Any product no =
matter how well make, can have some problems, and worst of all failure. =
Hope you have fun when you get a fix or a replacement
Ron Kyle
Anderson SC
rnkyle

7) From: frtamarazo
Hello, I am new to the list and to home roasting. I waited several months for the Cafe Rosto to arrive. A week later, after a joyous week of roasting, it died- the Saturday evening before Thanksgiving. I called and e-mailed the on-line company from which I purchased it. They told me that that never ever happened before. I was grateful that they sent me a new cafe rosto the next day. However, I am sure that I was not the only one with the problem. My roaster died in the same way. 1) cold air and 2) then there was only a slight rattling noise. In one week, I was addicted to roasting, cancelled my *$ subscription, and I felt great pain concerning my loss. I would suggest that you call the company and ask for a quick replacement. 
Frank
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8) From: Mike McGinness
From: "Peter Barnes" 
 Roasted several (3) batches today, then let the roaster sit for an
hour.
<Snip>
If you turn the dial past '4' and the heat doesn't come on it be sick big
time. Chaff blocking can only reduce airflow not cause the heater to not
come on at all. Neither of my two Rostos have died so I haven't had to
trouble shoot your specific problem. Depending on how long ago you bought it
either contact where you got it and or Steve at Brightway Ind. 510 623-1880.
Good luck and condolences!
BTW, it 'aint nuttin' u dun bad. I've roasted back to back batches 8+ hours
non-stop without killing mine... never wait for it to cool other than roast
cooling cycle...
MM;-) aka Kona Krazy miKe mcKoffee
Variable Variac Rockin' Rosto Roasting
Miss Silvia brewin'
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9) From: dewardh
Mike:
<Snip>
come on at all.
Beg to differ . . . there are four "points of failure" that could account for 
the symptoms described (fan works, heater doesn't): loose connector, failed 
timer switch, burned out heater, and failed "thermal protector".  The latter 
two failures can be caused by overheating as a result of a clogged chaff 
filter.  With 150g batches of some very high chaff beans this is a distinct 
possibility (my roast times "naturally" shorten by two minutes or more with 
some high chaff Ethiopians, for example, because of the reduced (hotter) 
airflow).  It *is* something to watch out for . . .
I'm betting on the "thermal protector" . . . (which I'd jumper and get on with 
roasting . . . ).
Deward
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10) From: Mike McGinness
From: "dewardh" 
<Snip>
for
<Snip>
failed
<Snip>
latter
<Snip>
distinct
<Snip>
with
<Snip>
with
<Snip>
Agreed there are 4 points of failure which can cause fan and no heat.
However, I stand by my statement "Chaff blocking can only reduce airflow not
cause the heater to not come on at all." Yes, previous chaff blockage could
possibly have induced your 3rd or 4th state yet the chaff blockage itself is
not what is now keeping the heater from coming on. It's a failure causing no
heat. Whether previous chaff blockage caused the failure is irrelevant in
determining what is now failed. That was my point.
MM;-) aka Kona Krazy miKe mcKoffee
Variable Variac Rockin' Rosto Roasting
Miss Silvia brewin'
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