Fault - DCF0

Thomas Garcia

Modified on: Thu, 24 Jan, 2019 at 2:01 PM

Display - Array Low

Description-

Low irradiance detection.

This is detected when DC Power is less than 7.5 kW or DC Voltage is under minimum PV Vdc for >10 msec.

Resolution-

Normal Operation (No Action Required)

■ Evening transition from power-export to sleep states due to waning irradiance

■ Common in early morning when low irradiance can’t support power-export Abnormal Operation (typically when solar irradiance > 200 W/m2)

■ Verify solar array modules for damage and source and output ckts wiring defects

■ Verify inverter re-combiner, input OCPDs and bus-bar connections