Internal fault (e.g. sensor)

What does 703 mean?

The Fronius Primo GEN24 208-240 inverter has detected an internal fault, specifically indicating an issue with one of its internal sensors. This can lead to incorrect measurements, improper control, or a complete shutdown for protection.

• Internal fault (e.g. sensor).

Click steps to track your progress.

1. 1

   Initiate a full power cycle of the Fronius Primo GEN24 208-240 inverter by carefully disconnecting both AC and DC power, waiting, and then reapplying power.

2. 2

   Monitor the inverter's diagnostic data (if accessible) to identify which sensor might be reporting abnormal values.

3. 3

   Check for any environmental factors (e.g., extreme temperature fluctuations, vibrations) that could affect sensor readings.

4. 4

   Review the inverter's event log for any prior or concurrent fault codes that might offer more clues about the sensor failure.

5. 5

   If the error persists, it suggests a hardware defect with an internal sensor or its associated circuitry; contact Fronius service for specialized diagnostics.