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Froniuis displaySTATE 475

STATE 475

Insulation error between solar module and grounding

Behaviors

Inverter does not feed current into the grid.

Status Code Class 4

Class 4 status codes (state codes that start with a four, i.e., 4xx), typically necessitate intervention by a Fronius-trained service technician.

STATE 475 applies to:

Primo

Primo

Galvo

Galvo

Symo

Symo

Solutions for this Error

Remedies

  • Check DC cables at the inverter and ensure DC disconnects are in the ON position. Measure DC voltage, polarity, and isolation at the inverter clamps (Qualified Techs only).
  • If this issue persists, the next steps include inspecting internal inverter components and their cabling by a trained Fronius Service Provider to further diagnose this specific issue. Defective components or the device itself may need to be replaced.

Get Help with this Error:

The best point of contact is your original installer
If the orginal installer is no longer available, contact a local Fronius Service Provider

DENVER RESIDENTS: Is your system located in the Denver, CO metro area? CONTACT US

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