2025-05-01

KEB's COMBIVERT F6 drives are advanced frequency inverters designed for precise motor control in various industrial applications. Despite their reliability, users may occasionally encounter fault codes that indicate specific issues requiring attention. Understanding these codes is crucial for timely diagnostics and minimizing downtime.​

Understanding Fault Codes

Fault codes on the KEB F6 drive are typically displayed on the drive's interface or via connected monitoring software. Each code corresponds to a particular fault condition, helping technicians identify and rectify issues efficiently.​

Common Fault Codes and Their Meanings

Below is a list of frequently encountered fault codes on KEB F6 drives:​

• E.OC (Overcurrent): Indicates that the drive has detected a current exceeding its specified limit. This could be due to a short circuit, excessive load, or sudden acceleration.​

• E.OP (Overvoltage): The DC link voltage has surpassed the permissible value. Possible causes include regenerative energy during deceleration or an overvoltage on the supply side.​

• E.OL (Overload): The motor has been operating beyond its rated capacity for an extended period. This may result from mechanical binding or an undersized motor for the application.​

• E.OH (Overheat Power Module): The drive's power module temperature has exceeded safe operating limits. Ensure adequate cooling and check for blocked ventilation.​

• E.dOH (Drive Overheat): The motor's temperature sensor indicates overheating. This could be due to excessive load or insufficient cooling.​

• E.EF (External Fault): An external fault has been triggered, possibly from connected equipment or safety interlocks.​

• E.ENC (Encoder Fault): Issues with the encoder signal, such as disconnection or malfunction, have been detected.​

• E.PU (Power Unit Fault): General fault in the power unit, potentially due to hardware failure or communication issues.

• E.buS (Bus Communication Error): Communication between the drive and connected devices has been disrupted. Check network connections and configurations.​

For a more exhaustive list of fault codes and detailed troubleshooting steps:

Troubleshooting Steps

1. Identify the Fault Code: Note the exact code displayed on the drive.​

2. Consult the Manual: Refer to the drive's manual for the specific code's meaning and recommended actions.​

3. Inspect Hardware: Check for obvious signs of damage, overheating, or loose connections.​

4. Verify Load Conditions: Ensure the motor isn't overloaded and that the application matches the drive's specifications.​

5. Reset the Drive: After addressing the issue, reset the drive to clear the fault. Monitor to see if the fault recurs.​

6. Seek Support: If the fault persists, contact KEB technical support or a qualified technician for further assistance.​

Preventive Measures

• Regular Maintenance: Schedule periodic inspections to ensure all components function correctly.​

• Proper Ventilation: Ensure the drive has adequate cooling to prevent overheating.​

• Correct Sizing: Use motors and drives appropriately sized for the application to avoid overloads.​

• Secure Connections: Regularly check and tighten all electrical connections to prevent communication errors.​

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By understanding and promptly addressing fault codes, you can maintain the efficiency and longevity of your KEB F6 drives, ensuring minimal disruption to your operations.

Contact PLG Automation today:
Email: sales@plgautomation.com
Phone: 800-906-9271