The last few days I had it already 3 times that in the middle of the last stage (4 stages programmed), that the machine stopped suddenly without finishing the stage and also without cooling. The first time I was not sure if I did the programming correctly, but the last 2 times I was sure. I roast indoors with an ambient temperature of around 70*F. Anyone else had this problem and what could be the cause ? Ton
Ton- I would first try the pre-set programs, and if it never happens during those, I'd make absolutely sure that you were programming it correctly. However, I would guess that not properly programming it shouldn't have any effect on the cooling cycle. Another possibility is that it is becoming overheated. I thought I read somewhere that the IR2 has a built-in safety feature which will stop the roast when the temp gets too high. If that would be the case, you could simply lower the roasting temp or use less beans per batch. I've never had this happen to my IR2, so maybe it's just a manufacturers defect. Good Luck, Rich M On Jan 6, 2007, at 12:51 PM, Ton van Rijn wrote: <Snip>
Are you seeing and smelling smoke and crackling, and is the readout all fogged up? That's what happens when my i-Roast and iR2 overheat-- usually from a bean mass that is too heavy (I've stopped measuring beans and started weighing them instead, especially heavy peaberries). I notice that after it cools sufficiently, the readout will pick up where it left off even if the motor does not start. On Jan 6, 2007, at 2:15 PM, Rich M wrote: <Snip> Sandy Andina www.sandyandina.com
That happened to mine as well. Soon after it occurred a few times over the course of a couple of weeks, my iRoast2 suddenly wouldn't heat much at all. It sat at 135 no matter what I programmed in (even during the pre-set programs). I hadn't changed anything–same beans, same amount of beans, same program, same ambient air temperature, etc. I called Hearthware customer service and they had me send it in and they sent me a new one. Luckily, I was still in the 1-year warranty period. Hopefully, yours isn't on its last legs but I'd keep an eye on it. I'm disappointed because I certainly expect a $150+ machine to last longer than 6 months. If this does happen to you and you get a new one, expect it to run much differently than the last one. It took me quite a while to figure out how to program the new one – just as long as the first time (maybe even longer because I expected it to be the same).
Thanks for the response. I think I have found the cause, although I am still not absolutely sure. I have an European model and after reading some threads in an , also European, forum, I had replaced a resistor by one of a higher value to slow the heating. This procedure was also suggested by i-Roast Customer Service to one of the members. It is however rather difficult to clamp the legs of the resistor correctly in its holder. I think that the heat and vibration caused the resistor getting loose, also because it happened in the last few minutes. Anyway I could get the original resistor, already factory-clamped in the holder, and put it in and until now everything works correctly again.