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Technical Support

Is your soft serve machine suddenly showing a warning that you do not understand, is your soft serve too runny or are your milkshakes too thick? The tips on this page allow you to easily resolve the issue all by yourself.

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Is your question not listed? Then watch our instruction videos or contact us. The NISSEI Service Center will be happy to help you.

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Read the technical FAQ

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Consult a user manual

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Frequently asked technical questions

  • Consult our support document for manualmessages. This document clearly shows what the manual code means andwhat you can do to resolve the problem.

    For machines with touchscreen: Download the document for M-codes.
    For older models: Download the document for E-codes.

  • The nozzle controls the amount of air inside the serve. The higher the number on the nozzle, the more air that is added. The more air you add, the higher the yield. However, if you add too much air, this can lead to LO warnings and cause the soft serve to spatter. Contact the NISSEI Service Center for more information on the proper settings for your ice mix.

  • Viscosity reflects the resistance in the freezing cylinder. The higher the resistance experienced by the stirrer in the cylinder, the colder the ice cream. This means viscosity determines the temperature and hardness of your ice cream. You can set the viscosity on your touchscreen or with the + and – keys on your soft serve machine. Consult the user manual for information about how to set viscosity on your machine.

  • Follow these steps to resolve the issue:

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    1. Check whether the ‘AIR’ switch has been activated.

    2. Check the shake-water control valve (turn left for more water, turn right for less water).

    3. Check whether the mixer pump works properly and disassemble and clean it if necessary.

    4. Install a smaller nozzle and assess the result after serving 20 to 25 ice creams and 15 to 20 milkshakes.

    5. Check if there is enough milkshake syrup in the syrup containers.

  • If your milkshakes are too thick, check…

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    … whether the Thickshake function has been activated.
    … the shake-water control valve (turn left for more water, turn right for less water).
    … if there is enough syrup in the syrup containers.

  • If your milkshakes splatter when you pour them, first check if the ‘AIR’ switch has been activated. Then check whether the mixer pump works properly, and disassemble and clean it if necessary. Our instructional videos show how this is done.

    Install a smaller nozzle and assess the result after serving 20 to 25 ice creams and 15 to 20 milkshakes. You will only see the result of the performed intervention after serving 20 to 25 ice creams and 15 to 20 milkshakes.

    1. First check if the mixer pump works properly. Disassemble and clean the mixer pump if necessary. Our instruction videos show how this is done.

    2. Check the nozzle. Clean the nozzle if necessary.

    3. Install a larger nozzle and assess the result after serving 20 to 25 portions of soft serve and 15 to 20 milkshakes.

    1. ​Check if the machine is set to ‘Run’ and whether the ‘AIR’ switch has been activated.

    2. Is ‘LO’ visible on the display? Follow the steps mentioned under the question ‘LO is showing on the display’.

    3. Use the pre-start button after the machine has been idle. This is the white button to the right of the control panel. Keep the button pressed for at least
      two seconds until numbers appear on the left-hand display.

  • Follow these steps:

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    1. Check whether the ‘AIR’ switch has been activated.

    2. Check whether your machine needs to be cleaned and perform cleaning if necessary. Our instruction videos show how this is done. We are happy to
      help you with this.

    3. First check if the mixer pump works properly. Disassemble and clean the mixer pump if necessary. Our instruction videos show how this is done.

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  • Check the following:

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    • Whether the ‘AIR’ switch has been activated.

    • Check if the mixer pump works properly. Disassemble and clean the mixer pump if necessary. Our instruction videos show how this is done.

    • Install a smaller nozzle and assess the result after serving 20 to 25 ice creams and 15 to 20 milkshakes. You will only see the results of the performed
      intervention once you start serving ice creams and milkshakes.

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    1. First check if the mixer pump works properly. Disassemble and clean the mixer pump if necessary. Our instruction videos show you how this is done.

    2. The cylinder may need to be filled and may not be pressurised. Activate the mixer pump.

  • This could be caused by various things:

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    • Your top bowl needs to be cleaned and de-scaled. When doing so, pay extra attention to the silver cap next to the air pump.

    • The level pin in the top bowl is missing (in older machines).

  • This indicates that the mixer pump may have been installed incorrectly. Disassemble, clean and assemble the mixer pump in the correct manner. In

    the meantime, replace all O-rings on the mixer pump. Our instruction videos show you step by step how to correctly perform all required actions.

  • Then subscribe to one of NISSEI’s convenient services and enjoy the benefits of regular maintenance and cleaning. 

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