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PowerFlex feedback cable troubleshooting troubleshooting guide

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.

Allen-Bradley PowerFlex Repair Services by Roc Industrial LLC

Is your Allen-Bradley PowerFlex drive malfunctioning? Roc Industrial LLC specializes in providing fast, reliable, and expert Allen-Bradley PowerFlex repair services. PowerFlex drives are variable frequency drives (VFDs) used to control the speed of AC motors in a wide range of industrial applications. When these critical components fail, it can lead to significant downtime and lost productivity. Roc Industrial LLC is your trusted partner for getting your PowerFlex drives back up and running quickly. We offer comprehensive repair solutions, leveraging our extensive experience, state-of-the-art diagnostic equipment, and a vast inventory of parts to ensure minimal disruption to your operations. Our commitment to quality and customer satisfaction makes us the preferred choice for Allen-Bradley PowerFlex drive repair.



About Allen-Bradley PowerFlex Drives

Allen-Bradley, a brand of Rockwell Automation, is a global leader in industrial automation solutions. Their PowerFlex series of variable frequency drives (VFDs) are renowned for their performance, reliability, and advanced control capabilities. PowerFlex drives are used in a multitude of industries, including manufacturing, oil and gas, water/wastewater treatment, and material handling. These drives offer precise motor control, energy savings, and enhanced system performance, making them essential components in modern industrial automation systems.


The PowerFlex family includes a diverse range of drives, from compact and cost-effective solutions to high-performance drives designed for demanding applications. They are commonly integrated into CNC machines, robotic systems, conveyor systems, pumps, fans, and other automated equipment. Allen-Bradley PowerFlex drives are known for their advanced features, such as sensorless vector control, Ethernet/IP connectivity, and built-in safety functions, which contribute to increased productivity and reduced downtime. Roc Industrial LLC understands the critical role these drives play in your operations and is dedicated to providing top-notch repair services to keep your systems running smoothly.



Supported Models & Series

We repair a wide range of Allen-Bradley PowerFlex models and series, including but not limited to:

  • PowerFlex 4 Series

  • PowerFlex 40 Series

  • PowerFlex 400 Series

  • PowerFlex 525 Series

  • PowerFlex 70 Series

  • PowerFlex 700 Series

  • PowerFlex 753 Series

  • PowerFlex 755 Series

  • PowerFlex 755TS Series

  • PowerFlex 750 Series

  • PowerFlex 6000 Series

  • PowerFlex 7000 Series

  • 22A-A, 22B-A, 22C-A, 22D-A, 22F-A Series

  • 22A-B, 22B-B, 22C-B, 22D-B, 22F-B Series

  • 22A-D, 22B-D, 22C-D, 22D-D, 22F-D Series


Common Allen-Bradley PowerFlex Problems We Repair

Allen-Bradley PowerFlex drives, while robust, can experience various issues over time. These problems can range from minor inconveniences to complete system failures. Roc Industrial LLC has extensive experience in diagnosing and repairing a wide array of PowerFlex drive issues.

  • Drive Fails to Start: The drive does not power on or respond to commands. This can be due to power supply issues, internal component failures, or control board problems.

  • Overcurrent Faults: The drive trips due to excessive current draw, often caused by motor issues, wiring problems, or internal drive faults.

  • Overvoltage Faults: The drive experiences excessive voltage, potentially damaging internal components. This can be due to regenerative braking issues or power supply fluctuations.

  • Undervoltage Faults: The drive shuts down due to insufficient voltage, often caused by power supply problems or wiring issues.

  • Communication Errors: The drive loses communication with the control system, preventing proper operation. This can be due to network issues, faulty communication modules, or configuration errors.

  • Overheating: The drive overheats and shuts down, often caused by inadequate cooling, excessive load, or component failures.

  • Blown Fuses: Fuses within the drive blow repeatedly, indicating a short circuit or other electrical fault.

  • Encoder Faults: The drive reports errors related to the motor encoder, affecting speed and position control.

  • IGBT Failures: Insulated Gate Bipolar Transistors (IGBTs) fail, leading to drive malfunction. IGBTs are critical components for switching power in the drive.

  • Capacitor Failures: Capacitors within the drive degrade or fail, affecting performance and reliability.

  • Display Issues: The drive's display is blank, dim, or shows incorrect information, hindering troubleshooting.

  • Parameter Corruption: Drive parameters are corrupted, leading to unexpected behavior.

  • Ground Faults: The drive detects a ground fault, indicating a potential safety hazard.

  • Speed Instability: The motor speed fluctuates erratically, affecting process control.

  • Torque Issues: The motor produces insufficient or excessive torque, impacting performance.


Our Allen-Bradley PowerFlex Repair Process

Roc Industrial LLC follows a rigorous and comprehensive repair process to ensure the highest quality Allen-Bradley PowerFlex repair services. Our process is designed to quickly identify the root cause of the problem, implement effective repairs, and thoroughly test the drive to ensure it meets or exceeds original performance specifications.

  1. Free Evaluation and Quote: Contact Roc Industrial LLC with details about your malfunctioning Allen-Bradley PowerFlex drive. We offer a free evaluation to assess the extent of the damage and provide you with a detailed repair quote. This quote will outline the necessary repairs, parts, and labor costs.

  2. Shipping Instructions: Once you approve the quote, we will provide you with detailed shipping instructions to safely transport your PowerFlex drive to our repair facility. We recommend using appropriate packaging materials to prevent further damage during shipping.

  3. Diagnosis Using Specialized Test Equipment: Upon receiving your drive, our experienced technicians will conduct a thorough diagnosis using specialized test equipment. This includes static and dynamic testing to identify faulty components and assess overall drive performance. We utilize advanced diagnostic tools to pinpoint the root cause of the problem quickly and accurately.

  4. Component-Level Repair and Replacement: Roc Industrial LLC specializes in component-level repair. Our skilled technicians will replace faulty components with high-quality replacements. We maintain a vast inventory of parts, including IGBTs, capacitors, control boards, and other critical components, to expedite the repair process. We use only industry-standard components or better to ensure reliability.

  5. Load Testing and Quality Checks: After completing the repairs, we subject the PowerFlex drive to rigorous load testing to simulate real-world operating conditions. This ensures that the drive performs reliably under various load conditions. We also conduct thorough quality checks to verify that all repairs meet our stringent quality standards.

  6. Warranty-Backed Return and Support: Roc Industrial LLC stands behind our repair work. We offer a comprehensive warranty on all Allen-Bradley PowerFlex repairs. If you experience any issues after the repair, simply contact us, and we will provide prompt and effective support. We are committed to ensuring your complete satisfaction.


Nationwide Repair Services

Roc Industrial LLC provides Allen-Bradley PowerFlex repair services to customers nationwide. We understand that downtime can be costly, so we offer fast turnaround times and reliable shipping options 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 provide you with expert PowerFlex drive repair services.


We offer expedited shipping options to ensure that your drive reaches our repair facility quickly. Once the repair is complete, we will ship the drive back to you promptly. Our goal is to get your Allen-Bradley PowerFlex drive back in operation as quickly as possible, minimizing downtime and maximizing productivity. Roc Industrial LLC is your trusted partner for nationwide PowerFlex repair services.



Why Choose Roc Industrial LLC?

When it comes to Allen-Bradley PowerFlex repair, Roc Industrial LLC offers several key advantages:

  • 30+ Years of Experience: With over three decades of experience in industrial electronic repair, we have the expertise to handle even the most complex PowerFlex drive issues.

  • Warranty-Backed Repairs: We stand behind our work with a comprehensive warranty, providing you with peace of mind.

  • Thousands of Parts in Stock: Our vast inventory of parts allows us to expedite the repair process and minimize downtime.

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

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

  • Exceptional Customer Support: Our dedicated customer support team is available to answer your questions and provide assistance throughout the repair process.

Don't let a faulty Allen-Bradley PowerFlex drive slow down your operations. Contact Roc Industrial LLC today for a free evaluation and fast, reliable repair. We are committed to providing you with the best possible service and getting your PowerFlex drives back in operation quickly and efficiently. Our expert technicians are ready to assist you with all your Allen-Bradley PowerFlex repair needs. Trust Roc Industrial LLC for reliable, warranty-backed repairs and exceptional customer support. We are your one-stop solution for Allen-Bradley PowerFlex troubleshooting, testing, and refurbishment.

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