Internal fault (e.g. internal power supply)

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The Fronius Primo GEN24 208-240 inverter has detected an internal fault within its internal power supply unit. This means that critical internal circuits are not receiving stable or correct power, leading to general malfunction or complete shutdown.

• Internal fault (e.g. internal power supply).

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1. 1

   Perform a complete power cycle of the Fronius Primo GEN24 208-240 inverter: Open the AC circuit breaker, then the DC disconnector, wait for a few minutes, and then reclose them in reverse order (DC first, then AC).

2. 2

   Check the incoming AC and DC voltages to the inverter to ensure they are stable and within specified operating ranges, as external power issues can sometimes stress internal power supplies.

3. 3

   Inspect the inverter's event log for any other codes that might have occurred simultaneously, which could offer clues.

4. 4

   Ensure the inverter's cooling system (fans, vents) is clear and operational, as internal overheating can damage power supply components.

5. 5

   If the fault persists, this points to an internal hardware failure of the power supply unit; contact Fronius service for advanced troubleshooting and repair.