Question about Nuova Simonelli Mac 2000 I Group Espresso & Coffee Maker
When the brew switch is activated, the water pressure is excessive, and outputs 10oz in the same time the other group outputs 1oz. (left group is OK, the right one has the problem) The water pressure on the group with the problem had once been turned up by someone, and I didn't observe the adjustment. Since then someone descaled it with a little acid, and now it is pumping way to much water compared to the good group. There is what looks to be a 10mm nut on both, and the one with good pressure has no threads showing; the one with excessive output has a little more than one thread showing. The hex nut is located at the back of the group, and looks to be a logical point to regulate the flow. I do not have a service manual to confirm.
Posted by Anonymous on
No. the amount of water to brew your coffee depends on the flowmeter. there is an orifice that regulates or measure the water flow. if you want to check this, you need to remove the output nut and clean this orifice and compare it to the other group. on the other hand, the one behind the group is just a provision for other things and not necessarily with any connection to the problem. if your group has scale build up. need to open it to remove and clean the scales.
Posted on Dec 18, 2017
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Posted on Jan 02, 2017
The gauge is connected with pump water output with a very thin pipe called cappilary pipe. So if any dirt that is comming from the water supply can blocked this cappilary pipe and if this happens during the pressuring phase then blocked a pressure of 4 bar inside the gauge. So if you desconect the cappilary pipe behind the gause the you should see if any water comes out from cappilary pipe. If not you can remove it also from the side of the water pump and try to clean it by blowing air from the side connected to gauge this can clean it perfectly. The you can conect it back together. The you will read normaly the pressure of the water mains and during making easpresso pressure of about 9 bars. If you dont have any change in the gauge after performing above the gauge might be the problem.
Posted on May 02, 2010
There could be a couple of reasons for this. The simplest could just be that you need a new group (brew) solenoid valve, yours might not being opening fully. You could also have a clog some where. Take the shower head out and soak it in PuroCafe over night. If that doesn't fix it you would have to start checking the jets in the head and or the tubing that supplies water from the heat exchanger to the groups.
Posted on Nov 02, 2010
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