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La Nuova Era Cuadra Owners Thread
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SStones
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SStones
Joined: 24 Nov 2012
Posts: 475
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 Wed Jan 29, 2014, 7:28pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

I agree.
Is the cord hard wired into the machine or is it an IEC connector, going to a socket/fuse-holder on the back of the machine? I would suspect that fuse holder as much as the pushbutton weight sensitive switch.

That weight sensitive switch should be connected directly between the fusebox (Or power cord) and the powerswitch.  Pull both wires off that weight-switch, then check both terminals on that switch for a short to ground (20M ohms on the multimeter test).  If it's not there, check both wires to ground. If hat will point you toward the power switch (Your suspect), or back toward the cord (Could be cut and touching metal) fuse holder (Could be melting).  You're getting close.
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r_g
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Joined: 1 Jan 2012
Posts: 22
Location: chicago
Expertise: I love coffee

Espresso: La Nuova Cuadra
Grinder: Baratza Preciso
Posted Wed Jan 29, 2014, 10:16pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

I also noticed that the relay looks burned. I'm not sure if that burned relay is the cause or just a symptom of a problem earlier in the chain (given that the GFI trips without the power switch on and the relay is further up the circuit). Any thoughts?
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 475
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 Jan 30, 2014, 5:10am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

Those relays always look burnt after several hours of use. It will need to be replaced often (Yearly, possibly more often if the machine is on many hours a day) as its contacts get worse and the machine stops heating. That's the relay's job, it kills itself rather than letting the pressostst kill its own contacts.
It is very unlikely that the relay is the cause of your short circuit, as you have pointed out, because it blows with the power switch off.
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Iluvdabean
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Iluvdabean
Joined: 7 Mar 2005
Posts: 1,255
Location: Kentucky
Expertise: I love coffee

Espresso: La Nuova Era Cuadra/Gaggia...
Grinder: Baratza Preciso/K-A Pro...
Drip: Bonavita BV 1800 TH
Roaster: Nesco 1010/Behmor 1600
Posted Thu Jan 30, 2014, 8:58am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

How does a plugged in machine thats off trip a GFI? Is there a draw from a machine thats off?
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 475
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 Jan 30, 2014, 6:59pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

It would be a burnt/cut powercord, wet/burnt fuseholder or wet/burnt/broken+touching_body switch.
Any circuit, even a short circuit, is a "Draw", that's why it's a problem, that's why it's a draw. If that circuit involves the ground conductor at all, it will trip a GFCI.
Imagine dropping a toaster into a bathtub. Even if it's off, the circuit completed through the grounding conductor would have to trip the GFCI.
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Iluvdabean
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Iluvdabean
Joined: 7 Mar 2005
Posts: 1,255
Location: Kentucky
Expertise: I love coffee

Espresso: La Nuova Era Cuadra/Gaggia...
Grinder: Baratza Preciso/K-A Pro...
Drip: Bonavita BV 1800 TH
Roaster: Nesco 1010/Behmor 1600
Posted Thu Jan 30, 2014, 7:17pm
Subject: Re: La Nuova Era Cuadra Owners Thread
 

So even plugged in and off its energized and faulting which trips GFI ? Thank You . Is it possible during descaling a piece of scale got loose and is faulting the water level sensor?
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SStones
Senior Member
SStones
Joined: 24 Nov 2012
Posts: 475
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 Fri Jan 31, 2014, 5:29am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

The powercord, fuse holder, reservoir-weight switch and power switch are all live, even with the power switch off.
But the reservoir water level sensor is not in the plumbing, so it's nothing to do with scale moving around. If it is wet it's because of water spilled around the reservoir.
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Iluvdabean
Senior Member
Iluvdabean
Joined: 7 Mar 2005
Posts: 1,255
Location: Kentucky
Expertise: I love coffee

Espresso: La Nuova Era Cuadra/Gaggia...
Grinder: Baratza Preciso/K-A Pro...
Drip: Bonavita BV 1800 TH
Roaster: Nesco 1010/Behmor 1600
Posted Fri Jan 31, 2014, 7:32am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

SStones Said:

The powercord, fuse holder, reservoir-weight switch and power switch are all live, even with the power switch off.
But the reservoir water level sensor is not in the plumbing, so it's nothing to do with scale moving around. If it is wet it's because of water spilled around the reservoir.

Posted January 31, 2014 link


I meant the auto fill for the boiler is that what you were talking about?
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washburned
Senior Member


Joined: 23 Nov 2012
Posts: 53
Location: napa
Expertise: I love coffee

Espresso: La Nuova Era Cuadra II
Grinder: Baratza vario
Posted Fri Jan 31, 2014, 8:03am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

I am wondering what is causing an infrequent issue with my cuadra2.  Sometimes when i go to use my machine. Either after it has been on for an hour or so in the morning before first shot  or even a couple hrs after using it successfully the group head temp will be very low say around 130. If I pull water thru the group head it will spike then lower and then slowly start to raise like normal.  It has happened  couple times before I descaled and a couple after. So in total 4 or so times in year or two.  Thanks for any help.
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slybarman
Senior Member
slybarman
Joined: 3 Nov 2011
Posts: 366
Location: usa
Expertise: I love coffee

Espresso: La Nuova Era Cuadra
Grinder: Baratza Vario
Posted Fri Jan 31, 2014, 8:29am
Subject: Re: La Nuova Era Cuadra Owners Thread
 

Thermosyphon stall. It happens.

http://www.frcndigital.com/coffee/stall.html
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