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Jura S9 problems
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Discussions > Espresso > Machines > Jura S9 problems  
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motherof4
Senior Member


Joined: 30 Mar 2013
Posts: 9
Location: california
Expertise: I love coffee

Posted Tue Apr 30, 2013, 9:33am
Subject: Jura S9 problems
 

I've had my Jura S9 for several years now, and have had the brew unit replaced once (about a year ago).  Now it's acting up in a funny way--sometime when you try to make a coffee (any kind) no water comes through the brew unit.  The coffee grounds are expelled dry. Sometime it works, and sometimes it doesn't. Any ideas out there on what may be the problem.  When I run the rinse cycle the water goes into the tray from somewhere internally, but does not come through the spouts.
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MerleApAmber
Senior Member


Joined: 12 Nov 2012
Posts: 203
Location: Atlanta
Expertise: I love coffee

Espresso: Breville BES900
Grinder: Baratza Preciso + Esatto
Vac Pot: Yuma
Drip: bah-humbug
Roaster: Hot Top 2K P
Posted Tue Apr 30, 2013, 1:09pm
Subject: Re: Jura S9 problems
 

That it doesn't happen every time is challenging. That you have unusual rinse behavior also seems to indicate a problem beyond what Jura would like the owner to troubleshoot. I don't know if you'd looked through the owners manual, I found it here US.Jura Click Here (www.us.jura.com)
It seems the only step that appears to address your problem is on page 35 under Troubleshooting. I don't know if that extends much help. On the other hand, in the first column on the same page, the company lists its' Customer Service Hot Line:  800 220 5701.
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 506
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Tue Apr 30, 2013, 5:22pm
Subject: Re: Jura S9 problems
 

The water is either leaking out of your brew unit past a worn O-ring on the upper or lower piston or the drain valve is not closing properly and the water is getting out there before getting into the coffee.  Run the cleaning cycle with a cleaning tablet, it is possible that the drain valve is just crudded up, and this could help.  If it doesn't sound like the pump is struggling, then the water is escaping somewhere. If the grounds aren't damp, then the leak is before it gets through the three-way/drain valve (Bottom of the brew unit) and up into the coffee grounds.  If the water ends up in the tray and not leaking out of a corner of the machine, then it is leaking very close to the brew unit or drain valve.

Does it only happen when you use pre-ground, or is it random even when using the grinder with the usual beans?  If it's only with preground, you can clean the filter in the brew unit with your finger and switch to a coarser pregrind.

Another Brew Unit rebuild would include a new drain valve and take care of it.
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motherof4
Senior Member


Joined: 30 Mar 2013
Posts: 9
Location: california
Expertise: I love coffee

Posted Tue Apr 30, 2013, 7:08pm
Subject: Re: Jura S9 problems
 

SStones Said:

The water is either leaking out of your brew unit past a worn O-ring on the upper or lower piston or the drain valve is not closing properly and the water is getting out there before getting into the coffee.  Run the cleaning cycle with a cleaning tablet, it is possible that the drain valve is just crudded up, and this could help.  If it doesn't sound like the pump is struggling, then the water is escaping somewhere. If the grounds aren't damp, then the leak is before it gets through the three-way/drain valve (Bottom of the brew unit) and up into the coffee grounds.  If the water ends up in the tray and not leaking out of a corner of the machine, then it is leaking very close to the brew unit or drain valve.

Does it only happen when you use pre-ground, or is it random even when using the grinder with the usual beans?  If it's only with preground, you can clean the filter in the brew unit with your finger and switch to a coarser pregrind.

Another Brew Unit rebuild would include a new drain valve and take care of it.

Posted April 30, 2013 link

The coffee is dry, and the pump sounds fine. It is with both the grinder and the pre ground. The water is in the tray, not leaking underneath.

Ill try the cleaning cycle tomorrow. Wish me luck, if this doesn't work I may change to a semiautomatic instead.
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MerleApAmber
Senior Member


Joined: 12 Nov 2012
Posts: 203
Location: Atlanta
Expertise: I love coffee

Espresso: Breville BES900
Grinder: Baratza Preciso + Esatto
Vac Pot: Yuma
Drip: bah-humbug
Roaster: Hot Top 2K P
Posted Wed May 1, 2013, 7:31am
Subject: Re: Jura S9 problems
 

Pardon me, Nora, if I may be so bold; How much does/did it cost to have a service center remove and replace the brew assembly, and assure proper operation?  (That is, if it was out of warranty the first time?) I'm trying to gain a handle on the economies of scale.  Thank you, with regard, Chris
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motherof4
Senior Member


Joined: 30 Mar 2013
Posts: 9
Location: california
Expertise: I love coffee

Posted Thu May 2, 2013, 7:48am
Subject: Re: Jura S9 problems
 

Thanks for all the advice. I ran a cleaning cycle and so far so good. As for how much the brew unit replacement was, I don't recall exactly, but think it was about $200. They do clean the machine up and did replace a few buttons for me.
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 506
Location: Canada
Expertise: Professional

Espresso: Giga 5, ECM Giotto, Rocket...
Grinder: Anfim Milano-Best
Vac Pot: No  :(
Drip: Some $30 thing from Walmart
Roaster: I buy pre-roasted.
Posted Thu May 2, 2013, 5:39pm
Subject: Re: Jura S9 problems
 

If the cleaning cycle made a big difference, it is possible that your sieve or your drain valve was getting stuck or clogged with overly fine coffee grounds. Try setting the grinder a click coarser after the next cleaning cycle if it reclogs in the next couple of months.  If it doesn't make the coffee worse, it may help the brew unit in keeping itself clean.
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RodLatte
Senior Member


Joined: 2 Jan 2014
Posts: 1
Location: Australia
Expertise: I like coffee

Posted Thu Jan 2, 2014, 7:16pm
Subject: Re: Jura S9 problems
 

Had a similar problem. No coffee and dry powder in refuse tray. Found it was due to the metal piston of the water valve at the bottom of the brew unit.

This water valve switches water flow to either through the coffee brewer and then to front of machine OR send water straight to drain tray. A solenoid at the back of machine pushes the piston, which  switches the water direction as required. The normal position is to send water through the coffee brew chamber.

The metal piston of the valve has a spring and a plastic piece at the end. The piston and plastic are connected together via small two small "toggles" on the plastic piece fitting into a collar on the metal piston.

In my machine one of the toggles had broken/worn so that the metal and plastic could seperate during operation. This meant that the piston of valve did not always return to "normal" position and caused water to be pumped directly to refuse tray and not through brew unit.

A dob of super glue to permanently join metal piston to plastic end piece fixed the problem!

To dismantle used:http://www.buessert.de/Technik/Jura-IMPRESSA-S95/Reinigungsanleitung.htm
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