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Nuova Simonelli Oscar no water indicator
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udaman
Senior Member


Joined: 2 Oct 2008
Posts: 21
Location: Tx
Expertise: Just starting

Espresso: Nuova Oscar
Grinder: Mazzer Mini
Posted Mon Jul 8, 2013, 9:22pm
Subject: Nuova Simonelli Oscar no water indicator
 

Hello,

I have a used Simonelli Oscar that has been working great for the past few years.  Within this few months, I had the problem the no water indicator turning on.  Each time, I remove/reinsert the tank 10-15 times and it work again.  Well this time the remove/reinsert tank trick would not work.  I tried turning the Oscar off/on, change out the water a few times, and put a some salt in the tank but none will work.   I have a whole house water softener before I had the Oscar which I don't think is the problem with the water not having minerals.

Is it possible to 'bypass' the water indicator?  Or other suggestions I can try?

thanks...
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plindy
Senior Member
plindy
Joined: 27 Nov 2002
Posts: 74
Location: Seattle
Expertise: Just starting

Espresso: NS Oscar
Grinder: SJ Pharos Lido HG-One
Posted Tue Jul 9, 2013, 2:07am
Subject: Re: Nuova Simonelli Oscar no water indicator
 

Two thoughts

Try turning power on with brew switch pushed in
more than once
This works with my plumbed in Oscar.

Pull the tank remove the two wires and check for corrosion on the male spade connecters , that they plug into. Clean all electrical bits , reinstall , fill the lower portion that the tank goes into with water , reinstall tank

Yes you can bypass the low / no water circuit
connect the two wires together , the brain now see' s water
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udaman
Senior Member


Joined: 2 Oct 2008
Posts: 21
Location: Tx
Expertise: Just starting

Espresso: Nuova Oscar
Grinder: Mazzer Mini
Posted Tue Jul 9, 2013, 5:20am
Subject: Re: Nuova Simonelli Oscar no water indicator
 

plindy Said:

Two thoughts

Try turning power on with brew switch pushed in
more than once
This works with my plumbed in Oscar.

Pull the tank remove the two wires and check for corrosion on the male spade connecters , that they plug into. Clean all electrical bits , reinstall , fill the lower portion that the tank goes into with water , reinstall tank

Yes you can bypass the low / no water circuit
connect the two wires together , the brain now see' s water

Posted July 9, 2013 link

Good suggestions.  I'll try it out.  thx...
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DanoM
Senior Member


Joined: 20 Mar 2013
Posts: 385
Location: Los Angeles
Expertise: I love coffee

Espresso: Bezzera Strega, '84 La...
Grinder: Compak K10, Kludge grinder,...
Posted Tue Jul 9, 2013, 7:12am
Subject: Re: Nuova Simonelli Oscar no water indicator
 

On my Oscar, when I was seeing similar issues, I jammed a dry paper towel into the socket for the water reservoir.  This drained away enough water that there were no water bubbles trapped when I put the reservoir back in place.

As mentioned turning the machine on with the brew button depressed may help move bubbles along too.

plindy Said:

Try turning power on with brew switch pushed in
more than once
This works with my plumbed in Oscar.

Posted July 9, 2013 link

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udaman
Senior Member


Joined: 2 Oct 2008
Posts: 21
Location: Tx
Expertise: Just starting

Espresso: Nuova Oscar
Grinder: Mazzer Mini
Posted Wed Jul 10, 2013, 7:49am
Subject: Re: Nuova Simonelli Oscar no water indicator
 

Took the Oscar apart to inspect the wires and connectors.  The spades did have a bit of light corrosion and I clean it up.  

Tried bypassing the low/no water circuit by attaching the two spades together with a paper clip to test before I cut off the spades.  Put the reservoir back in but the no water light still turns on.  Turn on power with brew switch on a couple of times and still no success.  Don't know why the bypassing the no/low water mod didn't work.  Maybe the spades was not securely tighten together with the paper clip.  I gave up the bypassing mod after a couple of tries.  

Attached the wires/spades back together, insert the reservoir and power on with brew switch enable a few times.  After a couple of tries, the 'heating' light turns on.  Wooohoooo!!!  It's working again.

Plindy/DanoM  -- thanks for your suggestions...
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udaman
Senior Member


Joined: 2 Oct 2008
Posts: 21
Location: Tx
Expertise: Just starting

Espresso: Nuova Oscar
Grinder: Mazzer Mini
Posted Mon Oct 14, 2013, 10:49am
Subject: Re: Nuova Simonelli Oscar no water indicator
 

Back at it again.  Oscar worked for three months and no water light problem is back.  Again, I cleaned the spades and screws connected to the water probe but no success.  Turn on with brew button enable about a dozen times with no success.  Also try bypassing the probe by connecting the two spades with wire.  Turn it on and the machine starts 'rumbling' for about a minute and the no water lights up.

Any ideas?
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plindy
Senior Member
plindy
Joined: 27 Nov 2002
Posts: 74
Location: Seattle
Expertise: Just starting

Espresso: NS Oscar
Grinder: SJ Pharos Lido HG-One
Posted Tue Oct 15, 2013, 2:41am
Subject: Re: Nuova Simonelli Oscar no water indicator
 

Open the steam valve
I always forget to include that part...

A few cycles of the on button  
No joy , a few cycles with the brew button depressed at power on

disconnect boiler level probe and cycle on , pump comes on , cycle off
reconnect blp try paragraph #2

These are the three sensing or ground reference's of the brain
with the wires at the tank connected together , legs 1 and 3 are connected at the brain which should tell the brain got 2 way 3 way boiler and level probe and tank ,  clear for  R1 to power up R2 and R3

am sure I missed a few steps ;
but the above is to kick-start a slow transformer or sticky relay in the brain..

So it might be the brain has old timer's  and just can't remember who you are

hope some or some combo of the above will work
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udaman
Senior Member


Joined: 2 Oct 2008
Posts: 21
Location: Tx
Expertise: Just starting

Espresso: Nuova Oscar
Grinder: Mazzer Mini
Posted Tue Oct 15, 2013, 8:47pm
Subject: Re: Nuova Simonelli Oscar no water indicator
 

Tried as suggested.

Open steam valve, turn on with brew button enable.  Did this a few times.

These are the connectors I removed at the control unit.

R1 - white cable (SSIC label)
R2 - red cable (SLIV label)
R3 - yellow/green (SRIF label)

These are the combination of connectors at the control unit I disconnect, put tank in, turn on with brew button enable and still no go.

  1.  remove R1
  2.  remove R1, R3
  3.  remove R1, R2, R3
  4.  remove R3

Attach are the pic of the control unit.

Still no joy.  What else can I try?

udaman: ns oscar-2.jpg
(Click for larger image)
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udaman
Senior Member


Joined: 2 Oct 2008
Posts: 21
Location: Tx
Expertise: Just starting

Espresso: Nuova Oscar
Grinder: Mazzer Mini
Posted Tue Oct 15, 2013, 8:47pm
Subject: Re: Nuova Simonelli Oscar no water indicator
 

another pic

udaman: ns oscar-1.jpg
(Click for larger image)
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plindy
Senior Member
plindy
Joined: 27 Nov 2002
Posts: 74
Location: Seattle
Expertise: Just starting

Espresso: NS Oscar
Grinder: SJ Pharos Lido HG-One
Posted Wed Oct 16, 2013, 1:39am
Subject: Re: Nuova Simonelli Oscar no water indicator
 

R1 , R2 , R3 are the internal relays of the Gicar  control unit
The white , red , and the two wire green/yellow  must be connected to the brain
The white and green/yellow are connected to the male spade connecters under the water tank , or to each other as in the plumbed version
The red wire connects to the boiler level probe on the boiler
My thought was to remove the red wire from the boiler level probe at the boiler , power on and see if the pump engaged to fill the boiler , reconnect red wire , heating element or no water light on
Just tried this on my tanked oscar  got element light
disconnect and reconnect red wire to BLP  got no water light
disconnect and reconnect got heating element light  and normal start up

These are all the tricks I know  to kick-start the sensing side of an intermittent / failing
oscar brain

HTH

plindy: Oscar diagram.jpg
(Click for larger image)
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