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Date: 17 Sep 2006 07:59:47
From: wes
Subject: Expobar Pulser buzzing, not working
Hi,

My new (to me, it's about 2 years old) Expobar Pulser which is on a
timer isn't working this morning. I thought it might just be a vaccuum
thing, but opening the steam wand didn't help. It's worked fine all
week.

Basically when I turn the machine on, after a couple seconds I hear a
click, then a low buzzing sound, and nothing happens. The buzzing
continues for as long as the machine is on. I think it's coming from
the pump.

Any ideas?

Wes





 
Date: 18 Sep 2006 17:42:27
From: Flasherly
Subject: Re: Expobar Pulser buzzing, not working

Jack Denver wrote:
> Please Mr. Flasher - it's one thing when you spout nonsense about
> abstractions, but when we starting dealing with the real, physical world
> your BS won't get you very far.

I wouldn't count on that. Abstractions, though different from the
real, practical (pragmaticism) needn't detract from application in
either instance. For instance, pragmatically, character judgement is
lacking when positive potential is not utilized, being a basis derived
by prior bias and therefore impertinent to efficiency.

> Wes' s problem sounds like a bad pump. The autofill is probably calling for
> water. His pump is bad and is humming but not pumping. Since it is not
> pumping the autofill is never satisfied so the pump keeps running and
> humming. The pump could be physically bad or just have lost its prime.

Believe it or not, that's what I initially wrote, that the pump's
suspect. I've a pump with three discernable pitches according to it's
routing: a) steam, b) PF, or c) a non-routed, plugged condition. A
brownbagged machine out of a furniture store, and minimum 9-bar
pressure extraction device. After seeing his - I scratched the pump
being bad in deference to product literature for a 'siphon that turns
on'. Then I wrote it might have two pumps, which was also scratched.
Generally I make it a point to stay away from higher-end machine
threads, and stick with what I know about brownbagging. Wes's post,
however, was sinking through the rank&file unanswered. Poor guy, $800
machine goes on the blink after two years. Written after a spent
morning paying a mechanic to explain the computer setup on a GMC S15,
which then turned out not worth an effort to rectify for a suitable
replacement (few days ago a woman jumped the median in a head-on with
me, and totalled out one of my earlier-make trucks).



 
Date: 18 Sep 2006 15:07:19
From: wes
Subject: Re: Expobar Pulser buzzing, not working
Jack,

Right on, good call. I took the pump out, and it fell apart in my hand-
it had burned into two pieces. I didn't have a water line kink, so I
don't know what the problem was, but there was definitely a call for
water to the boiler, and it never got filled, so the pump ran and ran.
. .

I spoke with Chris at Chris Coffee and ordered the 52 watt ULKA pump-
it has a thermosenor that will shut the pump off if it overheats (like
my situation). . .

Should be here Wendesday, then I'll be good to go. While I'm at it, I'm
replacing the group gasket, shower screen and double basket. Clean the
dispersion screw and I should be good to go!

Thanks for your help-

Wes

Jack Denver wrote:
> Please Mr. Flasher - it's one thing when you spout nonsense about
> abstractions, but when we starting dealing with the real, physical world
> your BS won't get you very far.
>
> The thermosiphon loop does not "turn on" - it's a convection current that
> operates by gravity and the temperature differential created when the
> machine heats up - hot water rises, cold water sinks . It is silent and
> operates passively and has nothing to do with the malfunction described.
>
> Wes' s problem sounds like a bad pump. The autofill is probably calling for
> water. His pump is bad and is humming but not pumping. Since it is not
> pumping the autofill is never satisfied so the pump keeps running and
> humming. The pump could be physically bad or just have lost its prime.
>
>
>
>
> "Flasherly" <gjerrell@ij.net> wrote in message
> news:1158607345.345776.165000@i42g2000cwa.googlegroups.com...
> > Looked at the description - $800 machine. It has a thermal siphon that
> > constantly circulates hot water through the brew group, and should turn
> > on right away or shortly after applying power. Did it make a
> > mechanical pumping noises when turned on and working correctly, and did
> > the pitch rise from a lower to a buzzing noise only after
> > malfunctioning? If so - may be that siphon.
> >
> > wes wrote:
> >> Hi,
> >>
> >> My new (to me, it's about 2 years old) Expobar Pulser which is on a
> >> timer isn't working this morning. I thought it might just be a vaccuum
> >> thing, but opening the steam wand didn't help. It's worked fine all
> >> week.
> >>
> >> Basically when I turn the machine on, after a couple seconds I hear a
> >> click, then a low buzzing sound, and nothing happens. The buzzing
> >> continues for as long as the machine is on. I think it's coming from
> >> the pump.
> >>
> >> Any ideas?
> >>
> >> Wes
> >



 
Date: 18 Sep 2006 12:22:25
From: Flasherly
Subject: Re: Expobar Pulser buzzing, not working
Looked at the description - $800 machine. It has a thermal siphon that
constantly circulates hot water through the brew group, and should turn
on right away or shortly after applying power. Did it make a
mechanical pumping noises when turned on and working correctly, and did
the pitch rise from a lower to a buzzing noise only after
malfunctioning? If so - may be that siphon.

wes wrote:
> Hi,
>
> My new (to me, it's about 2 years old) Expobar Pulser which is on a
> timer isn't working this morning. I thought it might just be a vaccuum
> thing, but opening the steam wand didn't help. It's worked fine all
> week.
>
> Basically when I turn the machine on, after a couple seconds I hear a
> click, then a low buzzing sound, and nothing happens. The buzzing
> continues for as long as the machine is on. I think it's coming from
> the pump.
>
> Any ideas?
>
> Wes



  
Date: 18 Sep 2006 16:36:43
From: Jack Denver
Subject: Re: Expobar Pulser buzzing, not working
Please Mr. Flasher - it's one thing when you spout nonsense about
abstractions, but when we starting dealing with the real, physical world
your BS won't get you very far.

The thermosiphon loop does not "turn on" - it's a convection current that
operates by gravity and the temperature differential created when the
machine heats up - hot water rises, cold water sinks . It is silent and
operates passively and has nothing to do with the malfunction described.

Wes' s problem sounds like a bad pump. The autofill is probably calling for
water. His pump is bad and is humming but not pumping. Since it is not
pumping the autofill is never satisfied so the pump keeps running and
humming. The pump could be physically bad or just have lost its prime.




"Flasherly" <gjerrell@ij.net > wrote in message
news:1158607345.345776.165000@i42g2000cwa.googlegroups.com...
> Looked at the description - $800 machine. It has a thermal siphon that
> constantly circulates hot water through the brew group, and should turn
> on right away or shortly after applying power. Did it make a
> mechanical pumping noises when turned on and working correctly, and did
> the pitch rise from a lower to a buzzing noise only after
> malfunctioning? If so - may be that siphon.
>
> wes wrote:
>> Hi,
>>
>> My new (to me, it's about 2 years old) Expobar Pulser which is on a
>> timer isn't working this morning. I thought it might just be a vaccuum
>> thing, but opening the steam wand didn't help. It's worked fine all
>> week.
>>
>> Basically when I turn the machine on, after a couple seconds I hear a
>> click, then a low buzzing sound, and nothing happens. The buzzing
>> continues for as long as the machine is on. I think it's coming from
>> the pump.
>>
>> Any ideas?
>>
>> Wes
>