[Homeroast] Fwd: I-Roast2 malfunctions

Allon Stern allon at radioactive.org
Sat Dec 26 21:27:11 CST 2009


Grr. List seems to have dropped my messages, for some reason.
Here are my responses which never hit the list, near as I can tell.
-
allon



Begin forwarded message:

> From: Allon Stern <allon at radioactive.org>
> Date: December 26, 2009 1:19:22 PM EST
> To: "A list to discuss home coffee roasting. There are rules for this list, available at http://www.sweetmarias.com/maillistinfo.html" <homeroast at lists.sweetmariascoffee.com>
> Subject: Re: [Homeroast] I-Roast2 malfunctions
> 
> 
> On Dec 26, 2009, at 1:01 PM, Starfinder Stanley wrote:
> 
>> Next I'll see if it runs through the whole cycle without beans, I guess....
>> Anybody have any ideas, suggestions?
> 
> Well, it sounds to me like the thermal cutout switch is opening. Most home appliances that generate heat have a thermal cutout switch to prevent runaway operation in the case of a malfunction, which might lead to a fire or catastrophic failure.
> 
> After two years, I'll bet theres a lot of crud built up inside the unit.
> Here's some pictures of a unit being taken apart. This one had an open coil in the heating section; I have yet to get around to repairing it.
> http://www.radioactive.org/iRoast2%20Teardown/Photos.html
> 
> These photos concentrate on the electronics, not on the fan and heater. The fan is a simple shaded pole motor, which comes apart pretty easily, and can be cleaned. The impeller can also be removed and cleaned. The crud build-up inside the fan assembly may cut the airflow in a way that external efforts will not address. If you are not comfortable taking the unit apart, do not. You can get hurt, or cause a fire. But if you are comfortable with fiddly electronics bits, I suggest a complete teardown may be in order if you want to rescue this machine.
> 
> I make take a few more pictures of the fan assembly, if you want to see it. In fact, no. I will go take pictures now. Back in a few :)
> -
> allon




Begin forwarded message:

> From: Allon Stern <allon at radioactive.org>
> Date: December 26, 2009 1:36:39 PM EST
> To: "A list to discuss home coffee roasting. There are rules for this list, available at http://www.sweetmarias.com/maillistinfo.html" <homeroast at lists.sweetmariascoffee.com>
> Subject: Re: [Homeroast] I-Roast2 malfunctions
> 
> 
> On Dec 26, 2009, at 1:19 PM, Allon Stern wrote:
>> 
>> I make take a few more pictures of the fan assembly, if you want to see it. In fact, no. I will go take pictures now. Back in a few :)
> 
> http://www.radioactive.org/iRoast2%20Teardown/Extras/blower_a.jpg
> http://www.radioactive.org/iRoast2%20Teardown/Extras/blower_b.jpg
> 
> The circular white component on the top of the upper-left piece in the first picture is the thermal cutout. Those will sometimes exhibit a failure. It could be that the thermal cutout has failed, or that it is working to prevent a hazardous condition.
> 
> -
> allon



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