Hardware error.
CriticalBit-2 of the 16-bit alert code: hardware error. Fault message sent via WiFi and monitored through Fsolar APP. The BDM inverter stops output power when this protective fault occurs.
CauseThe microinverter's self-diagnostics detected an internal hardware failure and stopped output power. The fault is inside the unit itself, not in the PV module or the grid connection.
Recommended fixPower down the inverter, wait 5 minutes for capacitors to discharge, then restart. If the fault recurs immediately or repeatedly, record the exact code and contact your installer or the manufacturer's service line.
Source:/Users/drm/Desktop/Felicity Datasheets/X-RAY-BDM2000-2250W-Micro-Inverter-User-Guide.pdf· page 8