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  • EXPOBAR repair question from newbie

    Dear all,

    we are running CREM A.C. S.L.  EXPOBAR OF-P-1GR pulser with grinder machine in Japan in a small foreign coffeeshop.

    After 1 year of use weve got a problem - after switching the machine on the pump starts to run, however the pressure in te boiler does not go up (at least the pressure indicator does not move from zero). Temperature of the boiler does not go up either. Pump is running continuously and does not stop.

    Specific to Japan is that there is no service for such kind of machines and there are no repair shops who can do a custom repair service. Therefore I decided to remember my electrical engineering knowledge and repair the machine by myself.

    My idea is to check if pump is really working (water goes from tank to boiler), then to check if boiler thermostat works properly. If everything is OK, then to check if the boiler pressure sensor is not broken.

    The question is if the boiler is already full, how can I drain it to prevent from overfilling? Is it necessary?
    Can you advise any source for usual algorhytms of checking up such kind of machines?

    Sorry if i ask the question in a wrong forum.

    Thanks in advance!

  • #2
    Re: EXPOBAR repair question from newbie

    Valmacha,

    Welcome to CS, well you if not heating up, you have only three choices.

    1. Thermostat
    2. Preasure switch
    3. Heating element ( probably this one)

    Test each of them with the multimeter, you probably find that the element has not any resisten.

    Any more question fill free to call me or pm. You should sendan email to CREM Spain to find out who is the service agent or importer to get the spare parts locally.

    Regards


    Renzo

    Comment


    • #3
      Re: EXPOBAR repair question from newbie

      Thanks for a quick reply! Tomorow I check tomorrow and reply to you once again. Can you help with spare parts just in case? I dont want to work with japanese companies here.

      Comment


      • #4
        Re: EXPOBAR repair question from newbie

        Valchama,

        Unfortunately, you have different electrical components that us in Australia. But if is the element the Bezzera BZ35 uses the same element, so you can go and see the Bezzera Distributor in Japan, years ago was Kalita Coffee.

        The other option I will call my supplier here in Australia to see if they have part that you need, but first let find the problem.

        Best regard


        Renzo

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        • #5
          Re: EXPOBAR repair question from newbie

          Valmancha,

          Sorry, I got confuse the heating element for the expobar not the same diametre of the Bezzera, is the VBM the one is similar than the Bezzera.

          my apology

          You are better of finding the local distributor in Japan

          Regards

          Renzo

          Comment


          • #6
            Re: EXPOBAR repair question from newbie

            Hi Renzo,

            I checked thermostat, heater and the pressure sensor. All seem to run OK.

            I disconnected all outgoing tubes from the pump to check if it works. Strange, but even if it emits a normal "pumping" sound, the water does not go through. Do you think that this is a problem of the pump? If its possible Id try to change it. I will send you the photo of the pump with fittings and valves. Pump type is ULKA EX5 120V rating. Can you help me with this?

            Thanx!

            Comment


            • #7
              Re: EXPOBAR repair question from newbie

              Try initially drawing water from the gropup, if thats OK and the flow rate looks good...then it could be your autofil solenoid is jammed in the brew position and wont allow the boiler to fill, because the boiler cant fill, the Giemmie Autofill controller will cut the power to the heating element to protect it.

              The solenoid could simply be scaled up and sometimes dismantling and soaking in strong descaler can fix the problem, otherwise buy another one. You can confirm its faulty by applying power to it and seeing what happens

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