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VFD intermittent output component-level repair for Fanuc

ISO 9001:2015 Certified Quality

Our certified process ensures consistent quality and reliable repairs every time.

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2-Year Repair Warranty

We stand behind our repairs with an extensive 2-year warranty on parts and labor for your peace of mind.

Fast Turnaround Time

Our efficient process and large parts inventory help minimize your operational downtime.

Expert Component-Level Repair

We find and replace individual failed components, offering a more affordable and effective repair than full replacement.

Free, No-Obligation Quote

Send us your item for a free evaluation and receive a detailed repair quote with no commitment required.

Expert Fanuc VFD Repair Services by Roc Industrial LLC

Is your Fanuc VFD (Variable Frequency Drive) malfunctioning, causing downtime and impacting your production? Roc Industrial LLC specializes in providing fast, reliable, and cost-effective Fanuc VFD repair services. We understand the critical role these drives play in your automation systems, and our experienced technicians are dedicated to getting your equipment back up and running quickly. With decades of experience, a vast inventory of parts, and a commitment to quality, Roc Industrial LLC is your trusted partner for Fanuc VFD repair.



About Fanuc VFDs

Fanuc is a world-renowned leader in automation, known for its high-performance CNC systems, robots, and servo drives. Their VFDs (Variable Frequency Drives), also known as inverters, are integral components in controlling the speed and torque of AC motors used in a wide range of industrial applications. Fanuc VFDs are designed for precision, reliability, and energy efficiency, making them a popular choice for demanding environments such as CNC machining, robotics, and automated manufacturing lines. These drives are critical for optimizing motor performance, reducing energy consumption, and ensuring smooth and precise operation of machinery.


Fanuc VFDs are widely used in industries such as automotive, aerospace, electronics, and general manufacturing. Their robust design and advanced control features make them suitable for applications requiring precise speed and torque control, such as spindle drives, feed axes, and robotic manipulators. Fanuc's commitment to innovation and quality has established their VFDs as a trusted solution for enhancing productivity and efficiency in industrial automation systems. When these critical components fail, you need a reliable repair partner like Roc Industrial LLC to minimize downtime and restore your operations.



Supported Models & Series

We repair a wide range of Fanuc VFD models and series, including but not limited to:

  • Fanuc Alpha i Series VFDs (e.g., A06B-6114-Hxxx, A06B-6124-Hxxx)

  • Fanuc Beta i Series VFDs (e.g., A06B-6110-Hxxx, A06B-6111-Hxxx)

  • Fanuc Servo Amplifier Modules (SVM)

  • Fanuc Spindle Amplifier Modules (SPM)

  • Fanuc Series 30i/31i/32i VFDs

  • Fanuc Series 0i VFDs

  • Fanuc AC Spindle Motor Drives

  • Fanuc AC Servo Motor Drives

  • A06B-6077 Series

  • A06B-6055 Series

  • A06B-6058 Series

  • A06B-6088 Series

  • A06B-6102 Series

  • A06B-6134 Series

  • A06B-6142 Series

  • A06B-6148 Series

This list is not exhaustive. Contact Roc Industrial LLC with your specific Fanuc VFD model number for a free evaluation and repair quote. We have experience with a wide variety of Fanuc VFDs, including older and less common models.



Common Fanuc VFD Problems We Repair

Fanuc VFDs are known for their reliability, but like any electronic component, they can experience failures over time. Our experienced technicians are skilled at diagnosing and repairing a wide range of common Fanuc VFD problems. We understand the urgency of getting your equipment back online, and we strive to provide fast and effective repair solutions.

  • No Output: The VFD fails to provide any output voltage to the motor, preventing it from running.

  • Overvoltage Fault: The VFD detects an overvoltage condition on the DC bus or output, causing it to shut down.

  • Overcurrent Fault: The VFD detects an excessive current draw, potentially indicating a motor or wiring issue.

  • Communication Errors: The VFD fails to communicate with the CNC controller or other devices on the network.

  • Overheating: The VFD overheats due to insufficient cooling, component failure, or excessive load.

  • Blown Fuses: Fuses within the VFD blow, indicating a short circuit or overload condition.

  • Encoder Faults: Issues with the motor encoder prevent accurate speed and position control.

  • Drive Not Ready: The VFD fails to initialize or enter a ready state.

  • Ground Fault: The VFD detects a ground fault, indicating a potential insulation breakdown.

  • Inverter Fault: Internal inverter components fail, leading to a complete VFD failure.

  • Intermittent Output: The VFD output fluctuates or cuts out unexpectedly, causing erratic motor behavior. This often points to component-level issues such as failing capacitors, resistors, or IGBTs.

  • Parameter Loss: The VFD loses its programmed parameters, requiring reprogramming.


Our Fanuc VFD Repair Process

Roc Industrial LLC follows a rigorous and comprehensive repair process to ensure the highest quality Fanuc VFD repairs. Our process is designed to identify the root cause of the problem, perform thorough repairs, and verify the functionality of the VFD before it is returned to you.

  1. Free Evaluation and Quote: Contact us with your Fanuc VFD model number and a description of the problem. We will provide a free evaluation and a detailed repair quote.

  2. Shipping Instructions: We will provide clear instructions on how to safely package and ship your Fanuc VFD to our repair facility.

  3. Diagnosis Using Specialized Test Equipment: Our experienced technicians will thoroughly diagnose the VFD using specialized test equipment to identify the root cause of the failure. We utilize advanced diagnostic techniques to pinpoint component-level issues.

  4. Component-Level Repair and Replacement: We perform component-level repairs, replacing faulty components with high-quality replacements. We stock a vast inventory of parts to ensure fast turnaround times.

  5. Load Testing and Quality Checks: After the repair is complete, we perform rigorous load testing and quality checks to ensure the VFD is functioning properly and meets original performance specifications.

  6. Warranty-Backed Return and Support: All of our Fanuc VFD repairs are backed by a comprehensive warranty. We also provide ongoing technical support to ensure your satisfaction.


Nationwide Repair Services

Roc Industrial LLC provides Fanuc VFD repair services to customers nationwide. We understand that downtime can be costly, and we are committed to providing fast and reliable repair services to minimize disruption to your operations. Whether you are located in New York, Los Angeles, Chicago, Houston, Dallas, or any other city in the United States, we can help.


We offer fast shipping options and quick turnaround times to get your Fanuc VFD back up and running as quickly as possible. Our experienced technicians are available to provide technical support and answer any questions you may have. Contact us today to learn more about our nationwide Fanuc VFD repair services.



Why Choose Roc Industrial LLC?

When you choose Roc Industrial LLC for your Fanuc VFD repair needs, you can be confident that you are working with a trusted and experienced partner. We are committed to providing the highest quality repair services and exceptional customer support.

  • 30+ Years of Experience: We have over 30 years of experience in repairing industrial electronic equipment, including Fanuc VFDs.

  • Warranty-Backed Repairs: All of our Fanuc VFD repairs are backed by a comprehensive warranty.

  • Thousands of Parts in Stock: We stock a vast inventory of parts to ensure fast turnaround times.

  • Fast Turnaround, Often Same-Day: We understand the urgency of getting your equipment back online, and we strive to provide fast turnaround times, often same-day service.

  • ISO-Certified Repair Processes: Our repair processes are ISO-certified, ensuring the highest quality standards.

  • Exceptional Customer Support: We are committed to providing exceptional customer support and answering any questions you may have.

Don’t let a faulty Fanuc VFD slow down your operations. Contact Roc Industrial LLC today for a free evaluation and fast, reliable Fanuc VFD repair.

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