No communication with Fronius Smart Meter
Fronius · Primo GEN24
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.
Common Causes
- 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.
Repair Steps & Checklist
Click steps to track your progress.
- 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
Ensure the Smart Meter is powered on and its status indicators (LEDs) are normal.
- 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
Inspect the communication cable for physical damage or breaks.
- 5
Power cycle both the inverter and the Smart Meter to re-establish communication.