Learn about Bosch Error Code 3501, its meaning, causes, and solutions for ground faults.
Error Code 3501 indicates a ground fault detected during the Riso check. This can affect the inverter's performance and safety.
To troubleshoot a ground fault, check the wiring for insulation damage and ensure proper grounding. Use a multimeter to test resistance.
Error 3501 is triggered when the inverter detects an abnormality in the insulation resistance (RISO) on the DC side. This measurement is critical as it assesses the integrity of insulation around the wiring and components. If the RISO falls below a predetermined threshold, typically due to a ground fault, the inverter enters a protective state to prevent further damage or safety hazards. Ground fault detection is a safety protocol that ensures any unintended current flow to ground is identified and mitigated, protecting both the system and personnel.
When the Bosch BPT-S inverter encounters error 3501, users may observe specific LED indicators flashing in a pattern that signals a ground fault condition. Additionally, monitoring apps may display alerts indicating a drop in energy production, often accompanied by a complete halt in inverter operation. Users might notice that the inverter is not feeding power to the utility grid, leading to potential revenue loss.
Always ensure that any troubleshooting or repairs are performed by a licensed electrician or certified solar installer to maintain safety and compliance with local electrical codes.
To prevent recurrence of error 3501, conduct regular inspections of the solar array, focusing on cables, connectors, and junction boxes. Ensure all components are rated for the environmental conditions they are exposed to. Implement routine maintenance schedules that include insulation resistance testing and firmware updates. Properly seal junction boxes and use weather-resistant materials to mitigate moisture ingress.