Delta Electronics Error Code E14 – Meaning, Causes &... | solardiagnostics.org

Technical Background:

The E14 error code indicates a problem with the DC bus voltage within the inverter. This fault is typically triggered when the inverter detects voltage levels that are outside of the acceptable range, which may result from insufficient or excessive input voltage. The inverter continuously monitors the DC voltage to ensure it is within specified limits. If it detects an anomaly, such as a ground fault or an open circuit in the array, it will shut down to protect both itself and the connected load. This is crucial for maintaining system integrity and safety.

Symptoms:

Users may observe the inverter displaying the E14 fault code on the screen or through the monitoring app. This may be accompanied by LED indicators showing an abnormal pattern, such as a steady red light or blinking lights. Additionally, there may be a noticeable drop in energy production, with the inverter ceasing to convert DC to AC power.

Possible Causes:

Insufficient or excessive DC voltage levels at the inverter input, potentially due to shading or array misconfiguration.
Ground fault detected in the array or wiring, causing the inverter to shut down to prevent damage.
Open circuit in one or more strings, leading to imbalanced voltage readings.
Faulty or degraded components within the inverter, such as capacitors or semiconductors.
Incorrect grounding or wiring issues at the junction box or combiner box.
Environmental factors, such as extreme temperatures affecting inverter performance.

Solution:

1

Use a multimeter to measure the DC voltage at the inverter input. Ensure it is within the manufacturer's specified range.
2

Inspect the solar array for shading, debris, or physical damage that may affect performance. Remove any obstructions.
3

Check the wiring for any open circuits or damaged connections. Ensure all MC4 connectors are secure and functioning.
4

Test for ground faults using an insulation resistance tester. Disconnect the array and check each string for proper insulation resistance.
5

Inspect the inverter for any visible signs of damage, such as burnt components or unusual smells. Replace any faulty parts as necessary.
6

Reconnect the system and monitor the inverter's performance through the monitoring app to ensure it is operating correctly.
7

If issues persist, consult the inverter's manual for specific troubleshooting steps or contact a certified technician for further diagnostics.

Safety Warning:

Always consult a licensed electrician or certified solar installer when performing maintenance or troubleshooting on your solar system to ensure safety and compliance with local codes.

Prevention:

To prevent the occurrence of the E14 error in the future, ensure regular maintenance of the solar array, including cleaning and inspections for shading and damage. Monitoring the system's performance through the inverter's app can help catch issues early. Additionally, ensuring proper system and grounding of the system can mitigate electrical faults.

Frequently Asked Questions

•What does the E14 error code indicate?

The E14 error code typically indicates a problem with the DC bus voltage. This can occur due to various reasons such as overvoltage or a fault in the inverter's circuitry.

•How can I troubleshoot the E14 error?

To troubleshoot the E14 error, check the DC input voltage levels and ensure they are within the specified range. Inspect the wiring and connections for any signs of damage or loose connections.

Delta Electronics Error Code E14 – Meaning, Causes & Solution

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention:

Frequently Asked Questions

•What does the E14 error code indicate?

•How can I troubleshoot the E14 error?

Related questions

Technical Background:

Symptoms:

Possible Causes:

Solution:

Safety Warning:

Prevention: