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Rocket Giotto making unusual noises
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Discussions > Espresso > Machines > Rocket Giotto...  
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Inflictionmitch
Senior Member


Joined: 30 Oct 2011
Posts: 27
Location: Montreal
Expertise: I love coffee

Espresso: La Pavoni Pisa
Posted Thu Jan 30, 2014, 10:06pm
Subject: Rocket Giotto making unusual noises
 

Hi everyone,

I purchased a Rocket Giotto Evoluzione V2 last November and have been loving this machine daily. Within several weeks, an issue with the microswitch developed where it began sticking (a new microswitch is being sent to me now), but aside from that, it's been operating like a dream. Less than dreamy has been the fact that the machine has started making a series of very unusual noises, both the pump and the boiler. Also, every now and then, the machine emits a rhythmic hissing sound, which is also rather perplexing.

I've uploaded several videos to Vimeo to illustrate the sounds:

Here is odd low-toned sound that the rotary pump is making - https://vimeo.com/85503429

Here is what the boiler, which used to be complexity silent, sounds like (the sound comes and goes) - https://vimeo.com/85503340

The rhythmic hissing noise is can be heard here - https://vimeo.com/85503382

Does anyone know what these sounds may be, and if they are cause for concern? It's all becoming a little disturbing for me as none of this seems to be the sounds of an overall healthy machine.
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Vivaldi
Senior Member


Joined: 3 Nov 2010
Posts: 182
Location: Minnesota
Expertise: Pro Roaster

Espresso: Spaziale Vivaldi II
Grinder: Mazzer Super Jolly
Drip: Technivorm
Roaster: Hottop
Posted Thu Jan 30, 2014, 10:59pm
Subject: Re: Rocket Giotto making unusual noises
 

The uploads didn't open for me.  Maybe open the machine and run it to see if there is pressure coming out from somewhere.  Is the the anti-siphon valve hissing?  Mine sputters when closing.  If the o-ring on that valve is bad it will leak air when it shouldn't.
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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, 5:22am
Subject: Re: Rocket Giotto making unusual noises
 

The rhythmic hissing is going to be a very slight leak at a fitting or valve.  If you put a stainless steel knife in the freezer for a few minutes to get it very cold, you can pass the tip of the knife around the fittings, breather valve and safety valve to see where the condensation develops on the knife and you've found the leak.
The boiler has to be hot, obviously...  So you could either heat the machine fully and then unplug it...  or make sure you don't touch electrical connections with the knife tip.
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calblacksmith
Moderator
calblacksmith
Joined: 25 Nov 2007
Posts: 7,722
Location: Riverside, Ca, U.S.A.
Expertise: I live coffee

Espresso: ECM Vene. A1, La Cimbali M32
Grinder: Azkoyen Capriccio, Major
Vac Pot: 40s era Silex
Drip: Msl. Com. brewers
Roaster: gave it a try, decided no
Posted Fri Jan 31, 2014, 6:45am
Subject: Re: Rocket Giotto making unusual noises
 

Start looking for the leak at the vacuum breaker valve, they take a lot of wear and are inexpensive to replace or repair. It is very unlikely that a sealed fitting will start leaking all of a sudden with no outside influence.

 
In real life, my name is
Wayne P.
Anything I post is personal opinion and is only worth as much as anyone else's personal opinion. YMMV!

Feed the newbs, starve the trolls and above all enjoy what you drink!
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Inflictionmitch
Senior Member


Joined: 30 Oct 2011
Posts: 27
Location: Montreal
Expertise: I love coffee

Espresso: La Pavoni Pisa
Posted Fri Jan 31, 2014, 4:49pm
Subject: Re: Rocket Giotto making unusual noises
 

Thanks, everyone. Any ideas what could be causing the other two sounds (from the rotary pump and the boiler)? The boiler never used to make the static electrical sound that it produces intermittently now - and it's only about three months old.
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DavecUK
Senior Member


Joined: 21 Sep 2005
Posts: 1,411
Location: UK
Expertise: I love coffee

Posted Fri Jan 31, 2014, 6:59pm
Subject: Re: Rocket Giotto making unusual noises
 

Im going to Hazard a guess that you've used it in hard water and the Vac breaker is leaking and the scale on the element is causing the boiler sounds. Unfortunately, although the videos will play, there is no sound.
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