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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.
Verifisert teknisk data. Sist oppdatert: March 2026
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Kilde: Fronius Symo Advanced Manual