Overcurrent

What does 203 mean?

This status code indicates that an overcurrent condition has been detected on the DC input of the Fronius Primo GEN24 208-240 inverter. This typically suggests a short circuit within the solar module strings or other problems with the PV array, or potentially an internal defect in the inverter.

• A short circuit in one or more solar module strings connected to the inverter.
• Mismatch or other configuration issues within the solar module strings leading to excessive current.
• An internal defect within the inverter's DC input current sensing or protection circuit.

Click steps to track your progress.

1. 1

   Check the solar module strings for correct configuration and functionality, looking for potential short circuits or incorrect wiring.

2. 2

   Measure the DC input current at the inverter's DC input terminals and compare it against the inverter's maximum input current rating.

3. 3

   Isolate individual strings to identify the source of the overcurrent.

4. 4

   De-energize the inverter (switch off AC and DC disconnects), wait for 5 minutes, then re-energize to reset. If the message persists, the inverter may require service.