Learn about isolation fault symptoms in CMS 2000 Inverters after rain and how to troubleshoot.
Isolation faults can occur due to moisture ingress, damaged wiring, or faulty components. It's essential to inspect the inverter and connections for any signs of water damage.
To fix isolation faults, ensure the inverter is dry and check all connections. If the problem persists, consult a professional technician for further diagnosis.
The CMS 2000 inverter includes insulation resistance monitoring to detect potential ground faults. When moisture enters the inverter or junction box, it can lower the insulation resistance (RISO), triggering a fault condition. The inverter's internal logic assesses this resistance, and if it falls below a predetermined threshold, it interprets this as a risk to operational safety, leading to shutdown to prevent damage or hazards.
After rainfall, homeowners may observe the inverter displaying fault codes on its LED indicators, often accompanied by a drop in energy production reflected in the monitoring app. The inverter may also fail to start or may shut down intermittently.
Always consult a licensed electrician or certified solar installer before performing any troubleshooting or repairs to ensure compliance with local codes and safety standards.
To avoid future isolation faults, ensure that the inverter and junction boxes are properly sealed against moisture ingress and that all connections are corrosion-resistant. Regular maintenance checks, including visual inspections and insulation resistance testing, should be scheduled, especially after severe weather events.