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A Rancilio S27 needs help
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Discussions > Espresso > Machines > A Rancilio S27...  
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CWWang
Senior Member


Joined: 7 Feb 2011
Posts: 61
Location: Florida
Expertise: I love coffee

Espresso: Arrarex Caravel. La Peppina....
Grinder: La San Marco SM91
Posted Mon Feb 28, 2011, 1:56am
Subject: A Rancilio S27 needs help
 

Recently I got a used Rancilio S27. I knew it has some problems with water dispensing and grouphead, but I still bought it since I can hear the pump and the boiler working. Unfortunately, it is not as simple as I thought to fix it. Let me describe the situation shortly:

  1. When I switch on, the pump such some water and stop. Then after 5 min, I can hear the boiler heating
       the water and then seal the build the pressure.
  2. When the machine is cold (pressure gauge shows "0"),  as I press the "coffee dispensing" button, I can
       hear the pump working but no water came out from grouphead.
  3. When the machine is warm (pressure gauge point at working zone), as I press the "coffee dispensing"
       button, I can only see the steam come out from grouphead but no water.
  4. The "hot water" switch never work no matter the machine is cold or warm. No sound, no light.
  5. The steam wand is the only thing work perfect as the machine is warm.

I never see this machine working properly before and this is the first time I use the HX machine. I really want to fix the machine but don't know where to start. Does anyone can give me some suggestions?
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SteveZ
Senior Member


Joined: 30 Nov 2010
Posts: 24
Location: Littleton, Co
Expertise: I love coffee

Espresso: Rancilio S27
Grinder: Baratza Vario
Posted Mon Feb 28, 2011, 12:38pm
Subject: Re: A Rancilio S27 needs help
 

Welcome aboard!

First, you might want to read thru the "The Rancilio S20 Series Thread (S24, S26, S27)" thread. Lot's of good information.

  • Hot water - The hot water will not work until the boiler has some pressure. When you press the switch, do you hear the solenoid "click" on then off a few seconds latter?  Most likely the solenoid is sticking from lime but no sound may mean you are not getting power from the control board.

  • Brew - Hearing the pump running when you press one of the dispensing buttons is a good sign. Again you probably have lime clogging up the works but it could also be an electrical issue.

Ready to open the case?

Steve
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CWWang
Senior Member


Joined: 7 Feb 2011
Posts: 61
Location: Florida
Expertise: I love coffee

Espresso: Arrarex Caravel. La Peppina....
Grinder: La San Marco SM91
Posted Mon Feb 28, 2011, 9:40pm
Subject: Re: A Rancilio S27 needs help
 

Really thanks for the reply. I have already open the case.
   For the hot water part, when I click the hot water button, there is no sound. I guess the problem might be the wire or control board. Unfortunately, the wire is fine as the multimeter shown. So the problem might be the control board. That's a big problem to me because I don't know how to test without the circuitry.

   For the brew part, I might take the grouphead apart. There is a question, if it has lime on it, can I remove it by dipping the grouphead in descale reagent?
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SteveZ
Senior Member


Joined: 30 Nov 2010
Posts: 24
Location: Littleton, Co
Expertise: I love coffee

Espresso: Rancilio S27
Grinder: Baratza Vario
Posted Mon Feb 28, 2011, 11:36pm
Subject: Re: A Rancilio S27 needs help
 

Descaling... Look thru the S20 thread referenced earlier.  There is lots of discussion on descaling from people who have way more experience than I do.  BTW, the post from aduzik on Wed Oct 21, 2009, 10:00am sounds just like yours.

I ended up taking my S27 completely apart, cleaning the inside of the pipes, boiler, flow meter, valves, etc with descaler, and replacing all of the seals. I doubt that a dip would have done the job.

Hot water...  Have you found the PDFs on the Rancilio site including a wiring schematic?  If checking the voltage for the hot water solenoid is a problem for you, then you might want to start with checking the valve for scale and cleaning it.

Enjoy!

Steve
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CWWang
Senior Member


Joined: 7 Feb 2011
Posts: 61
Location: Florida
Expertise: I love coffee

Espresso: Arrarex Caravel. La Peppina....
Grinder: La San Marco SM91
Posted Thu Mar 3, 2011, 12:42am
Subject: Re: A Rancilio S27 needs help
 

Thanks again. The grouphead problem is solved by cleaning the flowmeter. The hot water problem I think it's better to post on the S20 thread. So excited to see the water coming out!!!!!
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JLVB
Senior Member


Joined: 10 Jun 2011
Posts: 2
Location: up michigan
Expertise: Just starting

Posted Sat Jun 11, 2011, 8:33am
Subject: Re: A Rancilio S27 needs help
 

i would like to know where to get my S27 fixed profesional in the grand rapids area..
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