I've recently purchased nuova simonelli aurelia II volumetric 2 group machine. Now and then manual switch flashes, I've to fill the boiler manually, turn off the machine and turn it on again. It works and then repeats again after of couple of hours.
It means that no water is flowing on the flowmeters. need to check flowmeters if clogged
SOURCE: Nuova Simonelli Premier
Could be a couple of things. You will know if the pressure is bouncing around by watching your gauges. You want to pull between 9-10 bars when pulling a shot. The programming issue could be the fact that if it is used it could have what I like to call
a touchy brain board. Those do have to replaced every so often depending on how much use the machine gets. You can reprogram whenever shots start pulling bad until you have no choice but to replace the brain board. They are cashy. To program: push the stop and pitcher button at the same time and all lights will start flashing on that head. Have your grind set, use a lined shot glass and measuure your shots according to short or long, watching the flow, crema etc. The ultimate shots pull between 25 and 28 seconds.
Hope this helps.
SOURCE: Nuova Simonelli Mac 2000 - Boiler continues to fill up
I had the same problem of the boiler filling up all the way with water and the water was coming out of every hole in the machine. Turn the machine off, drain the boiler completely,
MAKE SURE VALVE #2 is CLOSED, this is the one under the drip pan all the way to the left. Turn on the water supply to the system and turn the system ON. The cup warmer on top will come on and stay on for anywhere between 10 to 20 minutes..... let it be,,, do not turn it OFF,, it will go off automatically. That should do it!
Hratch
SOURCE: OSCAR NUOVA SIMONELLI WONT" GO ABOVE 165F AT GROUPHEAD
Descale boiler and group then make sure steam gauge reads 1.2 bar. If not adjust p.stat.
SOURCE: My Nuova Simonelli Mac digit pushes steam out of the group
The metering jet on the top of the boiler is blocked.
SOURCE: nuova simonelli master
Your proble is that the coffee group is blocked. There many reason why you have this problem, like the group motor is damage ither the motor or a gear but you have to replace the complete unit. Their is also the posibility that something is bloking the group to complete the full motion, or something might have been bend. Their is also the posibility that the group limit switches to give wrong indication so the machine can not get any move responce. Unless you have experiance with this machines you have to ask professional help since you might damage the whole group system even that the cause is might be a very stubit one.
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