Internal fault (e.g. communication module)

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The Fronius Primo GEN24 208-240 inverter has detected an internal fault specifically related to its communication module or other critical internal components. This prevents data exchange and potentially affects overall inverter operation.

• Internal fault (e.g. communication module).

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1. 1

   Perform a full power cycle of the Fronius Primo GEN24 208-240 inverter by disconnecting both AC and DC power, waiting several minutes for internal capacitors to discharge, and then reapplying power.

2. 2

   Verify the status of any external communication interfaces (e.g., WLAN, Ethernet) to ensure they are properly connected and configured.

3. 3

   Check the inverter's display for any further specific error messages or sub-codes related to the communication module.

4. 4

   Ensure no physical damage has occurred to the communication board or its connections during recent handling or installation.

5. 5

   If the fault persists, this indicates an internal hardware failure, possibly requiring replacement of the communication module or the main board; contact Fronius service.