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Complete Rancilio Classe 10 rebuild - need help with ECU repair
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OvenbirdCoffee
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OvenbirdCoffee
Joined: 20 Sep 2011
Posts: 8
Location: Auckland, New Zealand
Expertise: I love coffee

Espresso: Breville Dual Boiler BES900
Grinder: Breville Smart Grinder...
Posted Tue Mar 26, 2013, 3:28am
Subject: Complete Rancilio Classe 10 rebuild - need help with ECU repair
 

So this is an 8 month rebuild project hampered by me breaking the unit bought at auction the struggling to pinpoint issue. It's a 2007 rancilio classe 10 SDE 2 group. I turned it on for the first time, not enough water in the boiler, it over heated and cut out, with the element subsequently not heating. A few times it started to heat And then stopped, but now doesn't even start. A new element, safety cutout and temperature probe rule out those items. It has a new pump, and all the flow units etc worked fine when I ran it through the diagnostics test that the rancilio is capable of. There is power to the board, all the fuses are intact, but there is no power going back to the elements. It's wired correctly. I've been talking with the rancilio importer, they got me to check the temp probe by putting a wire across the two pins where it plugs into the ECU. When I did this I accidentally crossed the pins right next to it as well and the previously working LCD display is now blank. Rancilio are saying that it is likely the ECU faulty and not sending the signal to power the element, or possibly the powerboard (but that's much less likely, and seems to be fine. Problem is that the ECU is $800 and the pCB is $350.

Can't afford it! I'm already in trouble with the wife for taking this long - can any brilliant forum member help diagnose or fix the ECU? Maybe it's a capacitor or something?!
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OvenbirdCoffee
Senior Member
OvenbirdCoffee
Joined: 20 Sep 2011
Posts: 8
Location: Auckland, New Zealand
Expertise: I love coffee

Espresso: Breville Dual Boiler BES900
Grinder: Breville Smart Grinder...
Posted Thu Apr 4, 2013, 4:43am
Subject: Re: Complete Rancilio Classe 10 rebuild - need help with ECU repair
 

update: pic of offending part:
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