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  1. 18-01-2008, 07:10 PM #1
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    nike123
    nike123 is offline Moderator Site Moderator : and general nice guy
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    Galletti air to water heat pump again!

    Hi!





    I was today at intervention and finally find out that expansion valve of water heat exchanger is blocked and that is why that unit few days in role trips at low pressure alarm. That happens because unit doesn't defrost and low pressure alarm trips. Before, when I came, ice is already melted. Then, two days ago I changed parameter for alarm reset and set it to automatic reset.
    This is result:

    left side


    right side



    Question is, why both sides are not equally frozen?

    This is refrigerant diagram:


    And this is pipe layout:

    Last edited by nike123; 19-01-2008 at 07:36 AM.
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