Goodwe Error Code 25 – Meaning, Causes & Solution -... | solardiagnostics.org

Technical Background:

Error 25 typically indicates a relay check fault, which can occur when the inverter detects an anomaly in the relay operation. The electrical logic behind this involves monitoring the relay's functionality to ensure it can safely disconnect the inverter from the utility grid or the solar array in case of a fault. If the relay fails to operate correctly, the inverter triggers this fault to prevent potential damage or safety hazards. This can be tied to ground fault detection mechanisms, where any leakage current could lead to unsafe conditions, or to insulation resistance measurements that fall below acceptable thresholds, indicating potential issues in the wiring or connections.

Symptoms:

When a Goodwe inverter displays error 25, users may observe the LED indicator flashing in a specific pattern, often accompanied by alerts in the monitoring app. The inverter may also show a significant drop in power production, indicating that it is unable to process energy from the solar array effectively.

Possible Causes:

Relay malfunction within the inverter.
Ground fault detected in the system.
Insufficient insulation resistance between the array and ground.
Overcurrent condition at the output of the inverter.
Internal circuit fault within the inverter's control board.
Communication failure between the inverter and the monitoring system.

Solution:

1

Disconnect the inverter from the utility grid using the AC and DC disconnect switches.
2

Use a multimeter to check insulation resistance between the array and ground; it should be above 1 MΩ.
3

Inspect the inverter's relay connections for any signs of damage or corrosion.
4

Verify the output current of the inverter is within the rated limits using a clamp meter.
5

Check for any fault codes using the inverter's monitoring app or display.
6

If the problem persists, perform a factory reset of the inverter as per the manufacturer's guidelines.
7

If all else fails, contact a licensed electrician or certified solar installer for further diagnosis.

Safety Warning:

Always ensure that any troubleshooting or repair work is carried out by a licensed electrician or certified solar installer to comply with safety regulations and the National Electrical Code (NEC).

Prevention:

To avoid encountering error 25 in the future, regularly inspect the inverter and its connections for any signs of wear or corrosion. Ensure that the insulation resistance remains above the recommended threshold by conducting periodic insulation resistance testing. Additionally, maintain proper wire management and avoid physical damage to the cables and junction boxes.

Frequently Asked Questions

•What does error code 25 indicate?

Error code 25 indicates a relay check fault in the inverter. This typically means there is an issue with the relay operation, which may affect the inverter's performance.

•How can I troubleshoot this error?

To troubleshoot error code 25, check the relay connections and ensure they are secure. If the issue persists, consult the user manual or contact technical support for further assistance.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Frequently Asked Questions

•What does error code 25 indicate?

•How can I troubleshoot this error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention: