Internal fault (e.g. DC measurement)

What does 708 mean?

The Fronius Primo GEN24 208-240 inverter has detected an internal fault related to its DC measurement circuitry. This means that the inverter cannot accurately measure the DC voltage or current from the PV strings or battery, leading to improper operation or shutdown.

• Internal fault (e.g. DC measurement).

Click steps to track your progress.

1. 1

   Perform a full power cycle of the Fronius Primo GEN24 208-240 inverter by opening both AC and DC disconnects, waiting, and then reapplying power.

2. 2

   Verify the DC connections from the PV strings and battery (if applicable) are secure and free of corrosion or damage at the inverter terminals.

3. 3

   Check the inverter's display for any additional error messages or diagnostic readings that might provide more specific details about the DC measurement fault.

4. 4

   Ensure that the PV strings and battery system are operating within their specified voltage and current ranges, as out-of-spec inputs could sometimes trigger measurement errors.

5. 5

   If the error persists, this indicates a failure in the inverter's internal DC measurement hardware; contact Fronius service for advanced troubleshooting.