Inverter with Smart Meter: no communication
Fronius · Primo GEN24
What does 403 mean?
The Fronius Primo GEN24 208-240 inverter, configured for operation with a Smart Meter, has lost communication with the device. This fault specifically refers to configurations where a Smart Meter is essential for the operating mode, thus halting normal inverter function.
Common Causes
- No communication with the 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
Reconfirm all communication cabling (e.g., RS485) between the Fronius Primo GEN24 208-240 inverter and the Smart Meter is correctly installed, free from damage, and securely terminated.
- 2
Check the power supply to the Fronius Smart Meter to ensure it is receiving adequate voltage and is operational.
- 3
Verify that the Modbus address and baud rate configured in the inverter match the settings of the Smart Meter.
- 4
Inspect the Smart Meter's status LEDs for any indications of error or power loss.
- 5
Power cycle the inverter and the Smart Meter in sequence to reset the communication interface.