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The problem with coplers or buttons BIQ Berker

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    The problem with coplers or buttons BIQ Berker

    Good day, I ran into a problem after 8 years of successful operation, suddenly the BIQ buttons were turned off (falling off) in an arbitrary order in the installation of about 30 current, 4-5 pieces were noticed
    It helps to return them to restart the power supply or physically remove to put
    Who faced?
    What to do?
    75010004 coplers
    751635xx BIQ buttons
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