No communication with Fronius Smart Meter

What does 401 mean?

The Fronius Primo GEN24 208-240 inverter is unable to establish communication with the connected Fronius Smart Meter. This prevents accurate energy monitoring and management functions that rely on meter data.

• No communication with the Fronius Smart Meter.
• Wiring fault (e.g. incorrect or loose cable, crossed data lines).
• Smart Meter not powered.
• Incorrect Smart Meter address or settings.

Click steps to track your progress.

1. 1

   Verify all communication cables (e.g., Modbus RS485) between the Fronius Primo GEN24 208-240 inverter and the Fronius Smart Meter are correctly wired and securely connected.

2. 2

   Ensure the Smart Meter is powered on and its status indicators (LEDs) are normal.

3. 3

   Check the Modbus address and other communication settings in the inverter's user interface to ensure they match the Smart Meter's configuration.

4. 4

   Inspect the communication cable for physical damage or breaks.

5. 5

   Power cycle both the inverter and the Smart Meter to re-establish communication.