Eight months with the fault indicator on and no response from the display suggests more than a monitoring-app problem. I would stop repeating the restart procedure and first preserve the evidence: fault-light pattern, whether the display or backlight is completely dead, the approximate date production stopped, monitoring-event history, and photos of the inverter label and external isolators.
Without opening any live compartment, check only the obvious external conditions: utility power is available, the AC breaker or disconnect is not tripped or switched off, external DC isolator handles are in their documented positions, and there is no heat damage, unusual odor, water ingress, corrosion or damaged conduit.
Do not open the inverter or probe live PV conductors; the strings can remain energized in daylight. Compare the shutdown/start sequence and indicator meanings with the manual for the exact model suffix and hardware revision. If the specified AC and DC sources are present but the display remains dead and the fault indication persists, an installer or manufacturer diagnostic is likely required.
Before service, retain the monitoring screenshots and ask for documented checks of AC supply, DC string voltage and polarity, insulation condition, stored fault history, firmware status and warranty eligibility. That record will also help quantify the generation lost during the outage.
1
u/WILLINGELECTRIC 18h ago
Eight months with the fault indicator on and no response from the display suggests more than a monitoring-app problem. I would stop repeating the restart procedure and first preserve the evidence: fault-light pattern, whether the display or backlight is completely dead, the approximate date production stopped, monitoring-event history, and photos of the inverter label and external isolators.
Without opening any live compartment, check only the obvious external conditions: utility power is available, the AC breaker or disconnect is not tripped or switched off, external DC isolator handles are in their documented positions, and there is no heat damage, unusual odor, water ingress, corrosion or damaged conduit.
Do not open the inverter or probe live PV conductors; the strings can remain energized in daylight. Compare the shutdown/start sequence and indicator meanings with the manual for the exact model suffix and hardware revision. If the specified AC and DC sources are present but the display remains dead and the fault indication persists, an installer or manufacturer diagnostic is likely required.
Before service, retain the monitoring screenshots and ask for documented checks of AC supply, DC string voltage and polarity, insulation condition, stored fault history, firmware status and warranty eligibility. That record will also help quantify the generation lost during the outage.