Just some updates, as I've been trying to resolve an "error #1" message using the excellent instructions from
@Mike Howard - just thought I'd add a bunch of boneheaded things that have gone wrong for me along the way, in case they are helpful to others who are not used to these kinds of repairs. Most apply to installing a reservoir, which is where I hit the problems.
1) Some tools that I found handy - angle cutters were great for taking old clamps off. I had a goose neck kettle, and found that was a perfect size for topping off the glycol, without using a funnel
2) Most errors I wound up with were due to glycol leaks, and were stupid things I'd done, including: insufficiently tightened screw clamps, missing o-rings, and no plumbers tape around reservoir fittings. Also, test before you close everything up, let it sit, and test again if you aren't confident! If you have a reservoir, a slow leak might mean that it runs an immediate test successfully, then leaks enough to fail later.
3) Error #1 returned after plugging all the leaks. It turned out that this was due to a kink in the glycol line. If you introduce a kink, even not a full one, it will prevent the glycol from circulating, and lead to the same error!
4) I found that, for testing error #1, a brewing recipe (with empty step filter) was faster than the cleaning cycle. The reason was that it put the wort heating FIRST, which triggers the error.
5) I can understand how some people get hooked on servicing these things. The first breakdown took a few hours, but now that I have everything memorized, it's pretty quick!