ACS Vesuvius - Service Boiler refill every 5-10 minutes - Normal behaviour?

esprezz0

Dear all,

its time again to write a post. My Vesuvius has been a friend delivering a great coffee to my family and now a lot of our friends for last couple of years (5 or so) with service needs, which I pretty much apprecieate about this mashine, beside the great Coffee.

Now recently my pump got broken, and I was lucky to find a replacement, gues what,,,NEW on ebay (delivered from Italy seller) and this for a very reasonable price (350 EUR). (For all of your outside, the pump did not broke on the gear side, but interestingly on the Motor side, there was some small amount of water inside, leacking from Pump to Motor, whcih resulted in a elecronic circuite board fault - I was surprised to find there water, which I presume should not be possible by motor housing design) - would be intrested to hear, if any of you had similar experience.

Now having replaced the motor, I was keen to do some more serve tasks. One topic has been gving me some headache for a long time - but I didn’t pay too much of attention.

The Issue I noticed is, the Mashine is running the refill process of the service boiler, in very short cycles, after 5-10 Min this whiout any interactions (I presume they are quite short, so need your input on how your mashine work) e.g. pulling hot water or steam. So my assumption is, i nthe water circuite between the service boiler and group head, there must be lost of water - minimal though.

The refill process itself seem to workd normal.

The Water level sensor, seem to work in general, I have tested to disconnect the cable, valve got open and pump start the fill porcess (by the way this cable got loose near the connector, and which got repaired already). Could it be, that this sensor is kind of worn on the part of sensor which sit inside the boiler?

Above behaviour applies only if the service boiler is on, menas it gets periodically heated. The refill process doesnt kick in (at all) if the boiler is off - so I assume the pressure in boiler have an impact on the decribed fault? behaviour and therefore I furhter assume that the service boiler loose water and this resul in waterlevel drop.

Could it be somewhere on the grouphead, a worn gasket which is not able to resist the pressure?

Cheers

DavecUK

esprezz0 a gasket in the group head wouldn’t cause the service boiler to lose pressure or lose water, it’s a twin boiler system so not really that type of connection.

To refill, that often probably means there’s a leak somewhere that you haven’t noticed. Especially as it only happening when hot, it could be a slow enough that it’s evaporating, but if it’s needing the fill so often, I would think you could probably see the leak.So you want to check in the drip tray and the tubes leading back to the tank, where something is leaking, like the safety valve or the vacuum breaker, and this is causing the level to drop.

esprezz0

I have checked the driptray option already, I put a small bowl to see if any water is runnig out or not. Unfortunatelly it was dry, the test run couple of hours.

The Maschine is disassembled and everytime I pick a coffee, I look around to check if there are any conspicuousness e.g. water leaks - but nothing so far spotted.

How often shoult the service boiler be refilled, lets say under low consumption conditions? - surely not every 10 minutes.

Can I somehow test/measure the water level sensor - whether it is working fine? By the way, do you know by any chance the replacement part number, or which onw I can buy on the internet alternatively?

Further, I read in one of the posts a hint, that the mass connection could be bad, but I was not able to locate the position/connection of this cable on my mashine as mentioned in the post, do you know where it is supposed to be on - on the service boiler (according to the post) or anywhere else?