CPU v3.18xx and below - Error Code - 199
CPU v3.19xx and above - Error Code - 18xC7
Error Message: RSD Error
Solutions: Rapid Shutdown hardware error. Contact SolarEdge support.
Troubleshooting-
1)Turn the toggle switch off, and verify that the VDC drops below 30V. If it does not, check the strings.
2) Turn OFF Inverter and open up Top Cabinet cover and confirm if there is any physical damage visible in the Inverter. If not, move to the next step.
3) Pair the optimizers.
4) Update the FW using an SD card.
Update Video Tutorial :