Oscar Professional No Power

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SudburyTony
Posts: 3
Joined: Wed Nov 24, 2010 4:25 pm
Real Name: Tony
Equipment: Nuova Simonelli Oscar Professional
Location: Sudbury, MA

Postby SudburyTony » Wed Nov 24, 2010 4:27 pm

I have a Nuova Simonelli Oscar Professional Espresso machine that no longer turns on. I was using it one day and heard a pop. I turned it off and now it will no longer turn on. No lights, no heating, just seems dead. I've opened it up and looked inside and everything appears OK (wires all connected, nothing looks burned or anything out of the ordinary). Unit is probably 10 years old and has been fairly lightly used over the years.

FYI - I have checked power at outlets and tried several just to be sure it isn't something that simple.

Thanks to anyone that can help.

quality & service, second to none
caeffe
Posts: 278
Joined: Wed Oct 10, 2007 5:49 pm
Real Name: caesar
Equipment: Mazzer Major, NS Oscar, Europiccola, Elektra Leva, Yama 5c, KMB
Location: socal

Postby caeffe » Wed Nov 24, 2010 6:32 pm

try the info on this thread:

Nuova simonelli oscar doesn't heat up

hopefully it is just the high temp limit switch that has been tripped. otherwise it could be the "brain" box.
LMWDP #162

SudburyTony
Posts: 3
Joined: Wed Nov 24, 2010 4:25 pm
Real Name: Tony
Equipment: Nuova Simonelli Oscar Professional
Location: Sudbury, MA

Postby SudburyTony » Thu Nov 25, 2010 3:07 pm

The Oscar doesn't seem to have a resettable high temp limit switch. Since the "brain box" is around $200 I am hoping it is something else. Anyone have any other ideas that I can check (and any ideas on why the circuit boards would suddenly die?).

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erics
Posts: 4648
Joined: Tue Aug 09, 2005 2:32 am
Real Name: Eric Svendson
Location: Silver Spring, MD

Postby erics » Thu Nov 25, 2010 3:56 pm

As per the electrical diagram available in the Oscar manual here - http://www.nuovadistribution.com/oscar.html , you have two wires leading to the water reservoir. One is most definitely a ground, the other leads to the control box. When the control box senses no continuity, it probably shuts the machine down.

Turn the machine off and unplug it. Now temporarily connect the two wires leading to the reservoir together and see if the machine will power up.
Skål,

Eric S.
http://users.rcn.com/erics/
E-mail: erics at erols dot com

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Carneiro
Posts: 1036
Joined: Thu Jul 16, 2009 4:11 pm
Real Name: Márcio
Equipment: Faema Velox, Gaggia Achille, Pharos
Location: Brazil

Postby Carneiro » Fri Nov 26, 2010 2:19 pm

As far as I know, the water sensor should stop the machine but the power light should be on (I think there is a "water level" light for this status).

There is a resettable safety thermostat indeed, at the side of the boiler. If you look at the page 5 of the parts breakdown, the part number is 09500004.

If the electronic box is damage, I know a Italy store that has it for EUR 73 + shipping.

One thing I've notice about the Oscar I'm restoring is that the heat element seems to be rated at 1200W for 110 or 115V. I think I measured 9.8 Ohms. So I'm having around 1600W (power line here is 127V) and a very hot power cord during warm up (almost 13A). I'll double check the heater wiring inside the machine and change the power cable, but the relay inside the electronic box is rated 16A - it should work fine.

Márcio.

SudburyTony
Posts: 3
Joined: Wed Nov 24, 2010 4:25 pm
Real Name: Tony
Equipment: Nuova Simonelli Oscar Professional
Location: Sudbury, MA

Postby SudburyTony » Sun Nov 28, 2010 1:24 pm

Thanks. I see the 09500004 part on the side of the bioler and it has a little "button" on it, but it doesn't seem to be a button you can press. I can spin it, but not push it.