Internal fault (e.g. PV Power Point Tracker)

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The Fronius Primo GEN24 208-240 inverter has detected an internal fault within its Maximum Power Point Tracker (MPPT) for the PV strings. This means the inverter cannot efficiently extract maximum power from the PV array, leading to reduced energy yield or complete shutdown.

• Internal fault (e.g. PV Power Point Tracker).

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1. 1

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

2. 2

   Verify that the PV string voltages (for both PV1 and PV2 if applicable) are within the inverter's specified MPPT operating range.

3. 3

   Check for any significant shading or performance issues across the PV array that could be confusing the MPPT algorithm.

4. 4

   Ensure the inverter's firmware is the latest version, as MPPT algorithm improvements or bug fixes are often included in updates.

5. 5

   If the fault persists and PV input conditions are normal, this indicates a failure in the inverter's internal MPPT hardware; contact Fronius service for repair.