www.klatchroasting.com: USBC champion, voted 2009 'best micro-roaster'

Skip to content

Pasquini Livia 90 brew pressure problem

Postby Jlbwilson on Thu Mar 24, 2011 9:18 pm

My pasquini machine won't create pressure when I load it with espresso. When I start to pull a shot it automatically back flushes
It will steam and create hot water, but there seems to be no pressure associated with a shot pull.
Any insight?
Jlbwilson
 
Posts: 1
Joined: Mar 24, 2011
Location: Apex, nc
Top

Postby HB on Thu Mar 24, 2011 9:20 pm

Jlbwilson wrote:When I start to pull a shot it automatically back flushes

You lost me there. Would you post a video?
Dan Kehn
User avatar
HB
 
Posts: 13168
Joined: Apr 29, 2005
Location: Cary, NC
Top

Postby erics on Thu Mar 24, 2011 10:04 pm

. . . but there seems to be no pressure associated with a shot pull.

Will water flow out of the grouphead with an empty portafilter in place or no portafilter in place? If so, how much water in, say, 30 seconds?

If no water flows out of the grouphead, you have a failed or stuck brew solenoid valve or solenoid valve coil.
Skål,

Eric S.
http://users.rcn.com/erics/
E-mail: erics at erols dot com
User avatar
erics
 
Posts: 2986
Joined: Aug 09, 2005
Location: Silver Spring, MD
Top

Postby Heckie on Fri Mar 25, 2011 1:03 am

Funny I just worked on a livia 90... The solenoid valve on the machine I worked on had been replaced 5 times in the last 10 years, that's excessive, and after taking apart the solenoid assembly I see why, they are smaller, poorly designed and not very durable. Scale buildup inside solenoid valve?? As previously mentioned... Check solenoid first.
User avatar
Heckie
 
Posts: 160
Joined: Jun 03, 2010
Location: mlps/st paul
Top

Postby HB on Fri Mar 25, 2011 10:04 am

Jono brought his Livia to our regular Friday get-together at Counter Culture Coffee's espresso lab in Durham. I confirmed the evacuation solenoid is the source of the buzzing sound. It may be stuck, it may be a short in the coil. He plans to disassemble/clean it and if that doesn't correct the problem, replace it.
Dan Kehn
User avatar
HB
 
Posts: 13168
Joined: Apr 29, 2005
Location: Cary, NC
Top

Postby Heckie on Fri Mar 25, 2011 1:10 pm

cool! Have you personally experienced significant problems with solenoids in these machines?
User avatar
Heckie
 
Posts: 160
Joined: Jun 03, 2010
Location: mlps/st paul
Top

Postby HB on Fri Mar 25, 2011 1:28 pm

No, but it wasn't hard to diagnosis once we took off the covers.
Dan Kehn
User avatar
HB
 
Posts: 13168
Joined: Apr 29, 2005
Location: Cary, NC
Top

Return to Espresso Machines

ContactContact Us

Legal disclaimer and copyright: This content and all its parts are copyrighted, all rights reserved. Content including all text and images in part or in whole may not be reproduced in any electronic or printed medium without prior permission. Home-Barista, Home-Barista.com and related logos are trademarks of Home-Barista.com, LLC. Other trademarks are the property of their respective owners. By accessing this site, you agree to the terms of service.

Overall speed: , current page: s, avg: s, max: s