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Isomac Relax Automatica troubleshooting - help required
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Discussions > Espresso > Espresso Mods > Isomac Relax...  
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thirdcrack
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Joined: 2 Nov 2012
Posts: 21
Location: Szentendre/Hungary
Expertise: Pro Roaster

Espresso: LSM Practical 95E
Grinder: LSM 90A
Roaster: Toper Cafemino, Gene CBR-101
Posted Fri Apr 5, 2013, 11:08am
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

O.K. I'm glad you are testing...

"Try the same with blind filter/finely grinded coffee and hot water tap CLOSED! Now you should have water leaking from the OP valve on the top of the boiler. "

I meant hot water tap closed, start brewing and check the over pressure valve on the top of the boiler/tank. If it was water filled frozen, then the gauge should have passed away as first. Your gauge is working fine. Sorry, that I'm fixed on this one valve but .... But there should be much more damage if it was full frozen.

Regards!

Gabor
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thirdcrack
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Joined: 2 Nov 2012
Posts: 21
Location: Szentendre/Hungary
Expertise: Pro Roaster

Espresso: LSM Practical 95E
Grinder: LSM 90A
Roaster: Toper Cafemino, Gene CBR-101
Posted Fri Apr 5, 2013, 12:00pm
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

AuxMemes Said:

Test done with coffee in group.  I can't see how water can come out of the hot water tap during brewing when there's no pressure in the boiler.

Posted April 5, 2013 link

If the hot water tap is open during brewing and the HX has a leak/Solenoid valve broken, then you will have increasing pressure in the boiler and water flowing trough the hot water tap (assuming there is resistance at the group).
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thirdcrack
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Joined: 2 Nov 2012
Posts: 21
Location: Szentendre/Hungary
Expertise: Pro Roaster

Espresso: LSM Practical 95E
Grinder: LSM 90A
Roaster: Toper Cafemino, Gene CBR-101
Posted Fri Apr 5, 2013, 12:02pm
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

AuxMemes Said:

It could have frozen.  It was in an outbuilding and -18 over winter, though it didn't fail until used for 2 months after.

Posted April 5, 2013 link

Nonono! that would be the easy way for you :-))).
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AuxMemes
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Joined: 18 Jul 2012
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Location: Gers, France
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Espresso: Isomac Relax Automatica
Grinder: Rancillio Rocky
Posted Fri Apr 5, 2013, 3:03pm
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

thirdcrack Said:

If the hot water tap is open during brewing and the HX has a leak/Solenoid valve broken, then you will have increasing pressure in the boiler and water flowing trough the hot water tap (assuming there is resistance at the group).

Posted April 5, 2013 link

That's really what I'm saying, except that the solenoid valve is shut tight so the problem must be the hx.  I'll take off the boiler and pressure test the hx line next.
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thirdcrack
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Joined: 2 Nov 2012
Posts: 21
Location: Szentendre/Hungary
Expertise: Pro Roaster

Espresso: LSM Practical 95E
Grinder: LSM 90A
Roaster: Toper Cafemino, Gene CBR-101
Posted Fri Apr 5, 2013, 10:21pm
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

Salut Peter,

Yesss! It's not a huge act. You can do no damage (don't force anything!). And don't be mad if the HX is fine. Award: you will have free access to "my" favourite solenoid valve below the boiler :-). How did you test it, if not physically?

Feed back, pls! I can't wait......

Bon ajustase!

Gabor
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AuxMemes
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Joined: 18 Jul 2012
Posts: 14
Location: Gers, France
Expertise: Professional

Espresso: Isomac Relax Automatica
Grinder: Rancillio Rocky
Posted Fri Apr 5, 2013, 11:44pm
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

I tested the solenoid by removing it, dismantling and inspecting. Then I re-assembled and pressure tested.  No pressure was lost.  I replaced it, removed the pipe to the boiler, removed the live wire to the solenoid and switched on . The pump runs but there's no water at the pipe to the boiler.  So the solenoid valve is air and water tight when closed (and clearly open correctly when in use).
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thirdcrack
Senior Member


Joined: 2 Nov 2012
Posts: 21
Location: Szentendre/Hungary
Expertise: Pro Roaster

Espresso: LSM Practical 95E
Grinder: LSM 90A
Roaster: Toper Cafemino, Gene CBR-101
Posted Sat Apr 6, 2013, 1:29am
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

Sorry! I had no idea that you've dismantled the machine that deep already. If the removed valve was tested perfectly closed than the only option is the HX (70-80 Euro for the boiler as spare). The test should show...

Just one last question (don't be mad about me :-): How have you tested the valve? You've written you tested it re-assembled. Have you tested it removed/stand alone as well?

I think - I'm not sure -  if it is tested only reassembled no one can say if it is faulty or not. Just in the case if the HX wast tested for O.K. before. Am I wrong? Again: I'm not an expert!!!

Gabor
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thirdcrack
Senior Member


Joined: 2 Nov 2012
Posts: 21
Location: Szentendre/Hungary
Expertise: Pro Roaster

Espresso: LSM Practical 95E
Grinder: LSM 90A
Roaster: Toper Cafemino, Gene CBR-101
Posted Sat Apr 6, 2013, 1:34am
Subject: Re: Isomac Relax Automatica troubleshooting - help required
 

I tested the solenoid by removing it, dismantling and inspecting. x]

Sorry! I haven't read carefully enough. Corious of your HX-Test!

Gabor
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