Like a few others, I have been facing a P0 error from time to time. Have gone through a long support thread with Aillio but there have been no clear answers or solutions. I was roasting two 1 KG lots of naturals back to back last evening. There was quite a bit of chaff to contend with. At the end of the 2nd roast (third overall), I got a P0 error. It got me thinking whether the P0 was being initiated as a result of poor airflow due to the 1KG load and the excessive chaff being produced by the naturals.
Has anyone had airflow issues roasting naturals in the past?
Definitely. My chaff collector got so hot the rubber seal softened and the chaff filter got pulled into the exhaust fan. Stopped the fan which gave me the associated ErC. That was sometime in 2019. Then right after that I saw the suggestion from Julio at Sweet Maria’s to vacuum between batches of high-chaff beans. I was concerned with affecting temps, but if I do it right after dropping the roasted beans I seems to be ok. In the end I decided to use the vacuum after every roast which I’ve now done for over a year.
I handled it by acquiring a second chaff collector kit (purchased from SM). I can swap the kit out doing B2B roasts in seconds, then spend more time vacuuming/cleaning the kit while the next roast was going. My goal was to have the same amount of CFM of air moving at a given fan speed from roast to roast.
remove and vacuum the chaff filter-especially for a natural.
vacuum the space between the drum and door.
I also do the above as soon as I drop the roast to help minimize heat recovery. However, over the years, I haven’t noticed any significant heat recovery increase between doing this and not doing it. For example, for a 1k roast to 310C preheat takes about 5 minutes for heat recovery until the Bullet asks me to charge.
I do a longer preheat because I watch the faceplate temp (vs. listening for the Charge announcement). For my purposes, that’s a better indicator of the temp required pre-charge. I’m roasting 550 gm loads exclusively. If I take too much time to vacuum the chaff collector it dramatically affects the time for faceplate temp to stabilize.
An aside: I think I’ve recently seen an increase in time required to reach a stable faceplate temp- as though the roaster isn’t producing quite as much heat during preheat. Maybe winter temps are cooler in the shop than I think, but I track ambient temp for all roasts so I’m pretty sure I know what the environment is. I may be seeing some change in power board output. Sure hope not but it has been just over 7 yrs since my R1 V1.5->V2 roaster was new. Guess the parts are getting old… just like the owner!
How do you measure the faceplate temperature? I’m assuming an IR thermometer?
Since, when I roast 1k, I always pre-heat to the max possible setting, 310C, if I let the pre-heat go too long, I get an induction temp. too high error, which really puts a crimp in things, of course. I have found the charge announcement to be sufficiently consistent.
Is there not a way to measure voltage using the info panel in RoastTime?
At any rate, maybe you could spring for one of them fancy R2 pros
