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Isomac Tea not building pressure

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  • Yelta
    replied
    Originally posted by ChrisStr View Post
    Just reporting that after getting my coffee machine back from Chris@TC that the machine is now working perfectly, so I am very happy.

    His good reputation, which is evident from reading the posts on here, is certainly well deserved. Thanks everyone for the advice on this thread.

    Regards,
    Chris.
    Pleased to hear you got it sorted out Chris, thought Talk Coffee Chris would look after you.

    Leave a comment:


  • ChrisStr
    replied
    Just reporting that after getting my coffee machine back from Chris@TC that the machine is now working perfectly, so I am very happy.

    His good reputation, which is evident from reading the posts on here, is certainly well deserved. Thanks everyone for the advice on this thread.

    Regards,
    Chris.

    Leave a comment:


  • ChrisStr
    replied
    Originally posted by EspressoAdventurer View Post
    Chris
    It wont hurt and would be well advised whilst there to talk to (the other) Chris about a Water Filtration unit...
    It recent times the topic of water filtration and espresso machines has fallen off the radar.
    GL
    EA
    Thanks for the tip, just read

    Commercial link removed per Site Posting Policy
    Last edited by Javaphile; 17 May 2019, 05:24 PM. Reason: Commercial link removed

    Leave a comment:


  • EspressoAdventurer
    replied
    Originally posted by ChrisStr View Post
    Hi,

    I have an Isomac Tea III cool touch. It worked fine for a few years (maybe around 4) anyway fairly recently it became very inconsistent ...... I took it to a shop in Melbourne to get it fixed. In their first attempt they gave it a service ($220) including descaling .......Unfortunately, this has not fixed the issue either.....
    Thanks,
    Chris
    Chris
    It wont hurt and would be well advised whilst there to talk to (the other) Chris about a Water Filtration unit...
    It recent times the topic of water filtration and espresso machines has fallen off the radar.
    GL
    EA

    Leave a comment:


  • Dimal
    replied
    I think you can trust what Chris@TC tells you mate...

    Mal.

    Leave a comment:


  • ChrisStr
    replied
    So I got the report on the machine yesterday, and will pick it up tomorrow. From the report

    We found previous service had been performed to a very poor standard. Inspected pump and
    replaced anti-cavitation valve. Resolved outstanding service issues: Disassembled, serviced,
    lubricated and replaced parts as required in the valves, wands and group of your espresso machine.
    Completed pressure and electrical check and cleaned machine.

    So Jackster no opv in the report (at least I am assuming as I have no idea what all of the different parts are). I am feeling confident that the machine is fixed this time (last time the other guys assured me that it was as good as new, so I guess I cannot be 100% certain until I try) so i bought fresh beans today as well, and can't wait to have a proper coffee machine back at my home.

    Leave a comment:


  • ChrisStr
    replied
    Just an update, I will post another one after I get it back and make a coffee. I finally got around to dropping off the machine at Talk Coffee today. Chris seemed confident that it will most likely be not difficult to fix, so I am feeling optimistic that my machine will be revived.

    Leave a comment:


  • ChrisStr
    replied
    Originally posted by Jackster View Post
    Opv is my guess!
    If he is replacing it, can I put up my hand for the old one?
    Sure!

    I will report progress on this thread.

    Leave a comment:


  • Jackster
    replied
    Opv is my guess!
    If he is replacing it, can I put up my hand for the old one?

    Leave a comment:


  • ChrisStr
    replied
    Originally posted by Yelta View Post
    Chris from Talk Coffee at Northcote is well respected in the industry.

    13/148 Arthurton Rd, Northcote VIC 3070
    0401 679 478
    Fantastic, I will give him a call during the week.

    Regards,
    Chris.

    Leave a comment:


  • Yelta
    replied
    Chris from Talk Coffee at Northcote is well respected in the industry.

    13/148 Arthurton Rd, Northcote VIC 3070
    0401 679 478

    Leave a comment:


  • ChrisStr
    replied
    Originally posted by Jackster View Post
    A suitably qualified tech that was aware of the 240v at the pump, element, solonoids and other spots, would now need to go into the machine.
    It's either the opv is bypassing too much water, or there is some pump problem.

    Opv.
    He should be able to look and see if 300ml/30sec is going out the opv bypass line. Normally the opv is after the pump, and a water line feeds back in before the pump.

    Hmm, there is a few ways to proceed. Maybe spin the opv in a turn or 2, and see if that lifts the pressure.
    You could put a pipe on the opv bypass line, and install the blind and see if all the 300ml of water is going out the bypass line.

    There maybe some detrius in the opv, holding it open- easy to disassemble and clean (noting turns on adjuster for reassembly.

    He would need to measure pump flow at the pump. If it is good flow there, you need to check flow before and after the brew solenoid.
    Thanks Jackster.

    Can anybody recommend a tech (self recommendations are fine) in Melbourne (Eastern Suburbs) that is qualified to do this?

    Thanks,
    Chris.

    Leave a comment:


  • Jackster
    replied
    A suitably qualified tech that was aware of the 240v at the pump, element, solonoids and other spots, would now need to go into the machine.
    It's either the opv is bypassing too much water, or there is some pump problem.

    Opv.
    He should be able to look and see if 300ml/30sec is going out the opv bypass line. Normally the opv is after the pump, and a water line feeds back in before the pump.

    Hmm, there is a few ways to proceed. Maybe spin the opv in a turn or 2, and see if that lifts the pressure.
    You could put a pipe on the opv bypass line, and install the blind and see if all the 300ml of water is going out the bypass line.

    There maybe some detrius in the opv, holding it open- easy to disassemble and clean (noting turns on adjuster for reassembly.

    He would need to measure pump flow at the pump. If it is good flow there, you need to check flow before and after the brew solenoid.

    Leave a comment:


  • ChrisStr
    replied
    Thanks again for the information. The steam is probably fine, it is the brew pressure that is down, it was always in the 9-11 bar range before, now it is 2 or less. I cannot even properly backflush the machine now it is so weak.

    The beans are less than a month old.

    I have a compac K3 grinder

    After removing the showerscreen 60ml in 30 seconds.

    After putting it back on I got 30ml in 30 seconds (not sure if it is getting even worse)

    The pressure gauge does not seem to budge at all now with the blind filter on, so below 1 bar.

    Leave a comment:


  • Jackster
    replied
    So googling the tea 3, reveals a hx machine with a brew and boiler gauge. I see now after rereading your post you are referring to the brew pressure.
    I detailed how the steam pressure in the boiler is maintained and you are suggesting that it is ok and not leaking. And as artman suggested, the pressure you should be seeing on the boiler pressure gauge. If this is fine, any problem with steam will be an instruction in the steam path.

    Ok, brew pressure...
    What pressure do you get if you put your blind portafilter in and run the brew?
    What flow do you get if you remove the shower screens and measure how much water the pump flows in 30sec?

    How old are your beans, what grinder?

    Leave a comment:

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