Learn about Growatt Error Code 120, its meaning, causes, and solutions for fault current sensor failure.
Error Code 120 indicates a fault with the current sensor in the inverter. This can lead to performance issues and requires immediate attention.
To troubleshoot Error Code 120, check the connections to the current sensor and ensure they are secure. If the issue persists, consider replacing the sensor.
Error 120 indicates a fault current sensor failure within the inverter. This fault typically triggers when the inverter detects an anomaly in the current measurements, which could stem from improper readings due to wiring faults or sensor malfunctions. The inverter relies on accurate current measurements to ensure proper operation and safety. If the fault current sensor cannot provide reliable data, the inverter will enter a fault state to prevent potential damage or unsafe conditions. This is often linked to issues such as ground faults, wiring integrity, and insulation resistance measurements.
When the Growatt inverter displays Error 120, users may observe a solid red LED indicator or a flashing status light, depending on the model. The monitoring app may also send alerts regarding system faults, and there may be a noticeable drop in energy production, indicating that the inverter has halted output due to the fault.
Always ensure that a licensed electrician or certified solar installer performs any troubleshooting or repair work on the inverter to prevent electrical hazards and ensure compliance with local codes.
To prevent Error 120 from occurring in the future, conduct regular inspections of the inverter and associated wiring. Ensure that all connections are secured and free from corrosion. Regularly test insulation resistance and maintain dry conditions around the inverter to mitigate moisture ingress. Additionally, consider scheduling annual maintenance checks with a certified solar installer to ensure optimal system performance.