I've had my S1V2 since 2007. After a recent shutdown and restart, the espresso head no longer allows water through. You can hear the pump working after pressing either espresso button, but it sounds like when a blank filter is in, and there is no change in any of the front panel lights. The pressure and temperature are the same as they were before the restart. Steam and hot water still come through the steam boiler without problem.
Any suggestions on what might be wrong?
- peter
S1V2 post-restart brew stoppage
- chas
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Re: S1V2 post-restart brew stoppage
That is a strange one. If there is no water exiting the group you should be getting a low flow error warning from the volumetric sensor. Assuming that sensor is working correctly, it would indicate that the water is coming out somewhere else. If it were on your floor you no doubt would have mentioned it. The only other place that water could come out and prevent the volumetric sensor from triggering would be from the expansion valve by dumping the water into the drip tray. Any sign that this is happening?
Of course if the expansion valve is stuck partially open (or way out of adjustment) you should get some dripping all the time even when the pump isn't running.
When you press the single or double cup buttons, does the automatic trigger still shut off after a period of time or does it keep running?
When you press the button, does the group pressure rise to 9 bar (or rise at all) or does it remain at street water pressure? If you hear the motor running but the pressure remains at street pressure, it is possible that the pump itself has failed, though if this is the case I'd think you should still be getting the volumetric sensor error after 10 or so seconds of no flow.
Did you drop the screens and diffuser to be sure neither of those has a blockage?
Of course if the expansion valve is stuck partially open (or way out of adjustment) you should get some dripping all the time even when the pump isn't running.
When you press the single or double cup buttons, does the automatic trigger still shut off after a period of time or does it keep running?
When you press the button, does the group pressure rise to 9 bar (or rise at all) or does it remain at street water pressure? If you hear the motor running but the pressure remains at street pressure, it is possible that the pump itself has failed, though if this is the case I'd think you should still be getting the volumetric sensor error after 10 or so seconds of no flow.
Did you drop the screens and diffuser to be sure neither of those has a blockage?
Chas
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Re: S1V2 post-restart brew stoppage
I see I did not leave the pump working long enough to get an alarm. I get a flashing 14-15-16 when I press the one cup and a 17-18-19 when I press the double. There was no automatic shutoff after one minute; not sure if I needed to let it go longer to see if that kicks in.
There's no dripping into the tray while not pumping nor discharge into the tray during or immediately after the pump is running. While it pumps, I'm getting 9 bar. I've done this without the screens and diffuser, and the results are the same.
- peter
There's no dripping into the tray while not pumping nor discharge into the tray during or immediately after the pump is running. While it pumps, I'm getting 9 bar. I've done this without the screens and diffuser, and the results are the same.
- peter
- chas
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Re: S1V2 post-restart brew stoppage
It sounds like the 3-way valve is clogged up. Unfortunately, since you have no flow through the group, cleaning it is going to be more difficult that just putting Cafiza powder in a blind PF basket and running a bunch of backflush cycles. You are probably going to have to remove the 3-way solenoid and the valve associated with it, manually clean it, and then reassemble.
It's the part labelled "A" in the photo below. Be sure the water and power are Off and the machine is completely cooled down before you start. It will probably take you as long to remove and later reinstall the covers as it does to remove and clean the valve.
It's the part labelled "A" in the photo below. Be sure the water and power are Off and the machine is completely cooled down before you start. It will probably take you as long to remove and later reinstall the covers as it does to remove and clean the valve.
Chas
LM GS/3 & LaSpaziale Dream v 1.25 (US 120V)
Mazzer Kony E, Customized Rocky
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LM GS/3 & LaSpaziale Dream v 1.25 (US 120V)
Mazzer Kony E, Customized Rocky
Hottop P/B
- chas
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Re: S1V2 post-restart brew stoppage
BTW: What exactly did you mean by shutdown and restart? Did you just unplug it and plug it back it or was the machine Off for an extended period?
Chas
LM GS/3 & LaSpaziale Dream v 1.25 (US 120V)
Mazzer Kony E, Customized Rocky
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Mazzer Kony E, Customized Rocky
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Re: S1V2 post-restart brew stoppage
This morning, I was annoyed at myself for not turning off the espresso machine the night before, so I could start taking a look at that three-way valve first thing. I randomly hit the brew button (perhaps muscle memory from doing this every morning) and water came out of the group head like normal! I immediately had an espresso.
The no-flow problem lasted for two and a half days, and went away on its own, somehow.
What I meant by shutdown was turning the machine off and then unplugging it, restarting being the reverse. The machine had only been off and unplugged for ~8 hours during the building maintenance. I always do this during scheduled water and power outages as well as during trips away of a week or more.
Thanks so much for your help, Chas. I'll let the forum know if I ever learn what the cause of this was.
- peter
The no-flow problem lasted for two and a half days, and went away on its own, somehow.
What I meant by shutdown was turning the machine off and then unplugging it, restarting being the reverse. The machine had only been off and unplugged for ~8 hours during the building maintenance. I always do this during scheduled water and power outages as well as during trips away of a week or more.
Thanks so much for your help, Chas. I'll let the forum know if I ever learn what the cause of this was.
- peter
- chas
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Re: S1V2 post-restart brew stoppage
Probably having hot water up against whatever was blocking the line for an extended time finally dissolved or loosened it. Those are the good kind of fixes. How long had it been since you backflushed before you had turned it off?
Chas
LM GS/3 & LaSpaziale Dream v 1.25 (US 120V)
Mazzer Kony E, Customized Rocky
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LM GS/3 & LaSpaziale Dream v 1.25 (US 120V)
Mazzer Kony E, Customized Rocky
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