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475

Insulation fault (connection between solar module and ground)

Fronius · Symo Advanced Manual

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An insulation fault has been detected in the connection between the solar modules and ground. This means there's an unintended electrical path from the DC side to ground, which is a safety hazard.

Vanlige årsaker

  • Degradation or damage to the insulation of DC wiring from solar modules
  • Moisture ingress into PV connectors or junction boxes
  • Ground fault within a solar module

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    If this status code keeps recurring, contact your system engineer to perform insulation resistance tests on the solar module wiring.

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Verifisert teknisk data. Sist oppdatert: March 2026

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