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help with my cremina
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dj2000lbs
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dj2000lbs
Joined: 22 Apr 2013
Posts: 16
Location: CHICAGO
Expertise: Just starting

Posted Thu Jul 18, 2013, 10:26am
Subject: help with my cremina
 

I have a grounding problem with my cremina does anybody know whats wrong with my machine?

dj2000lbs: grounding problem 1.jpg
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dj2000lbs
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dj2000lbs
Joined: 22 Apr 2013
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Location: CHICAGO
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Posted Thu Jul 18, 2013, 10:27am
Subject: Re: help with my cremina
 

pic 2

dj2000lbs: grounding problem 2.jpg
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dj2000lbs
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dj2000lbs
Joined: 22 Apr 2013
Posts: 16
Location: CHICAGO
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Posted Thu Jul 18, 2013, 10:27am
Subject: Re: help with my cremina
 

pic 3

dj2000lbs: grounding problem 3.jpg
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calblacksmith
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calblacksmith
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Espresso: ECM Vene. A1, La Cimbali M32
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Roaster: gave it a try, decided no
Posted Thu Jul 18, 2013, 11:32am
Subject: Re: help with my cremina
 

I am not sure what I am seeing.
Is this corrosion around the bottom of the boiler? Is it scale? How do you know there is a ground problem, is it shocking you?

It looks like the ground wire is connected to the chasis, as it should be. The white wire should go to the wide blade of the plug and the black wire should go to the narrow end of the plug.

Is your outlet wired correctly?

 
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dj2000lbs
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dj2000lbs
Joined: 22 Apr 2013
Posts: 16
Location: CHICAGO
Expertise: Just starting

Posted Thu Jul 18, 2013, 5:29pm
Subject: Re: help with my cremina
 

it looks and feels like battery corrosion or something along those lines....? Its coming from the ground wire I wondered the same thing myself about the ground in the outlet being wired correctly its plugged strait into the wall.... i've done 2 different outlets.. my building is from 1928

Idk I was thinking about buying the wiring kit from orphanespresso.com
im not sure what it needs... I can't get the screw unscrewed from the frame cause of the corrosion stuff...?
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SStones
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SStones
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Espresso: Giga 5, ECM Giotto, Rocket...
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Posted Thu Jul 18, 2013, 6:18pm
Subject: Re: help with my cremina
 

The stuff you're seeing on the outside of the boiler is just old calcium/lime scale that has built up from a very old, small leak that evaporates on the outside of the boiler. That probably isn't causing a grounding problem but might be a result of your safety-relief valve constantly relieving.
If your heating element is cracked, water gets into it and causes a short to ground. You'll see this as a constantly overheating issue if you're not plugged into a GFI outlet.  Or as a grounding issue if it is constantly blowing a GFI outlet.  This might be what you're talking about.

You can test the element by removing the two leads (With the machine unplugged). The element leads are the two wires coming up through the boiler end in that first picture.  (Not the thing with the red button, that's a high-limit thermostatic breaker).  With the leads disconnected, check the resistance through the element from one lead to the other with your ohm-meter set to it's fine setting (Probably max. 20 ohms)...  You should read something between 10 and 17 ohms through the element.  Then set the ohmeter to the coarsest setting (Up in the 200K ohms range) and make sure there's no conductivity at all between either element lead and the body of the boiler.  If there's any conductivity between element and boiler, that's your short-circuit.

If I'm completely off base, please re-describe your situation.  I may be barking up the wrong tree.  I am a little confused by the fact that your leak seems to be coming from that ground wire.  The hole it is screwed into is shallow. It doesn't go all the way through your boiler wall.  It might just be a good evaporation place to see the limescale build up from a leak elsewhere.
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dj2000lbs
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dj2000lbs
Joined: 22 Apr 2013
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Location: CHICAGO
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Posted Fri Jul 19, 2013, 9:44am
Subject: Re: help with my cremina
 

I think you guys are right its probably from the boiler/coil.  I wish I had an ohmmeter to test I think i'll just go ahead in buy since I know mine is original from 1989 its probably time for replacement after 24 years.
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drgary
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Joined: 21 Jan 2010
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Espresso: Baby Lusso Caravel Coffex...
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Posted Tue Aug 27, 2013, 12:32am
Subject: Re: help with my cremina
 

To buy a coil without testing first is odd. These machines last forever. Also from your photo I can't tell whether the grey stuff underneath the new boiler insulation is asbestos. The boilers on some of the older Creminas were originally covered with that and it should be properly removed if it's still there. Otherwise the boilers can develop pin holes that can be sealed with a kind of Loctite. Before they're sealed you may see spots of limescale from the small leaks.
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uscfroadie
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uscfroadie
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Location: San Antonio
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Espresso: GS/3 Strada MP, BDB; owned...
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Drip: Nope
Roaster: owned Behmor
Posted Tue Aug 27, 2013, 6:01am
Subject: Re: help with my cremina
 

Looking at your pictures I have my theories.

1) At some point the machine was overheated (terminals are melted)
2) That overheating probably severely shortened the life of your thermal switch (one with the red reset button)
3) You need a new boiler gasket... the bottom of yours is/has been leaking
4) If the reast of your seals are in a similar condition to your boiler gasket, you should replace them all

While it could be a bad heating element, these RARELY go bad.  The thermal switch is there to die in order to save your heating element.  Wouldn't you rather spend $15 on a replacement part rather than $150?  I would.

Get a multi-meter before you buy ANYTHING!  Go to Orphanespresso's page and follow their troubleshooting guide found here.  It'll help you pinpoint the problem, and once you have, you can order the replacement parts you need.

If you aren't comfortable doing this yourself, they will rebuild the entire machine for you for a very reasonable price - which could end up being less than you'd spend on replacement parts you don't need.

Just My $.02
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