Huawei Error Code 2001 – Meaning, Causes & Solution -... | solarfaults.org

Technical Background:

The Huawei SUN2000 inverter is designed to monitor the input voltage from the solar array continuously. When the voltage exceeds the inverter’s maximum input threshold, typically due to excessive solar irradiance or faulty components, the inverter triggers fault 2001 as a protective measure. This is essential to prevent damage to the inverter and to ensure safe operation. The inverter utilizes internal logic to measure the voltage across each string, and if the readings exceed the safe operational limits, it enters a fault state to protect the system.

Symptoms:

Upon experiencing a fault 2001, users may observe the inverter's LED indicators flashing a specific pattern indicating an error state. The monitoring app may display alerts regarding high string input voltage, and there may be a noticeable drop in energy production compared to expected output levels.

Possible Causes:

Excessive solar irradiance causing the array voltage to exceed the inverter's maximum input voltage limit.
Faulty or degraded solar panels leading to abnormal voltage readings.
Incorrectly configured string lengths resulting in voltage mismatches.
Loose or corroded connections in the wiring harness between the array and the inverter.
Inadequate shading management causing sporadic voltage spikes during peak sunlight hours.

Solution:

1

Use a multimeter to measure the open-circuit voltage of each string in the array to verify if they exceed the inverter's specified maximum input voltage.
2

Inspect all connections and junction boxes for signs of corrosion or looseness, tightening and cleaning as necessary.
3

Evaluate the configuration of the strings to ensure they are within the manufacturer's recommended voltage limits and properly balanced.
4

If voltage readings are normal, check for shading issues that could cause sudden voltage fluctuations and adjust or trim surrounding vegetation.
5

If the issue persists, consider contacting the manufacturer for firmware updates or further diagnostics.

Safety Warning:

Always ensure that any troubleshooting or maintenance is performed by a licensed electrician or certified solar installer to comply with safety regulations and to prevent personal injury or system damage.

Prevention:

To prevent future occurrences of fault 2001, ensure regular maintenance of the solar array, including inspection of panels, connections, and wiring. Implement a shading analysis during system design and periodically check for any environmental changes that may affect performance. Additionally, consider using voltage monitoring tools to provide real-time data on string performance.

Frequently Asked Questions

•What does Huawei Error Code 2001 indicate?

Error Code 2001 indicates that the string input voltage is too high, which can lead to system shutdown. It's essential to check the voltage levels and ensure they are within the specified range.

•How can I troubleshoot high string input voltage?

To troubleshoot, measure the voltage at the string input and compare it with the inverter's specifications. If the voltage exceeds the limit, consider reducing the number of panels in series or checking for faulty components.

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Frequently Asked Questions

•What does Huawei Error Code 2001 indicate?

•How can I troubleshoot high string input voltage?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention: