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Emerson inverter troubleshooting and refurbishment

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.

Emerson Inverter Repair Services by Roc Industrial LLC

Is your Emerson inverter malfunctioning and causing downtime? Roc Industrial LLC specializes in providing fast, reliable, and expert Emerson inverter repair services. We understand the critical role inverters play in your operations, whether it's controlling motors, managing power, or ensuring the smooth functioning of your industrial equipment. With decades of experience, Roc Industrial LLC is your trusted partner for Emerson inverter troubleshooting, testing, and refurbishment. We offer quick turnaround times, comprehensive diagnostics, and warranty-backed repairs to get your equipment back up and running efficiently.



About Emerson Inverters

Emerson is a globally recognized leader in technology and engineering, providing innovative solutions across a wide range of industries. Their inverter product line is known for its reliability, performance, and advanced features. Emerson inverters are designed to precisely control motor speed and torque, optimizing energy efficiency and enhancing process control. These inverters are widely used in applications such as HVAC systems, pumps, fans, conveyors, and various industrial automation processes. Emerson's commitment to quality and innovation has made them a preferred choice for businesses seeking robust and dependable power control solutions.


Emerson inverters are integral to numerous industrial applications, including CNC machinery, robotics, automation systems, and manufacturing plants. Their advanced control algorithms and robust design ensure precise motor control, improved energy efficiency, and reduced equipment wear. Emerson's reputation for quality and reliability has made their inverters a staple in industries where performance and uptime are critical. Roc Industrial LLC understands the importance of these inverters and offers specialized repair services to keep your operations running smoothly.



Supported Models & Series

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

  • Control Techniques (An Emerson Company) Inverters:

    • Commander Series (e.g., Commander SK, Commander C)

    • Unidrive Series (e.g., Unidrive M, Unidrive SP)

    • Digitax Series (e.g., Digitax HD)

    • Mentor Series (e.g., Mentor MP)

  • Emerson Industrial Automation Inverters:

    • EV Series (e.g., EV1000, EV2000)

    • ES Series (e.g., ES1000)

    • iDrive Series

  • Specific Model Examples:

    • SKC340075

    • UMS340055

    • EVD222-4

    • ES1-2201


Common Emerson Inverter Problems We Repair

Emerson inverters, while reliable, can experience various issues over time. Our experienced technicians are equipped to diagnose and repair a wide range of common failures. Here are some of the most frequent problems we address:

  • No Output Voltage: The inverter fails to provide the necessary output voltage to the connected motor or equipment.

  • Overvoltage or Undervoltage Errors: The inverter detects voltage levels outside the acceptable range, triggering fault codes.

  • Communication Errors: The inverter loses communication with the control system or other devices, disrupting operations.

  • Overheating: The inverter's internal components overheat due to excessive load, inadequate cooling, or component failure.

  • Blown Fuses or Tripped Circuit Breakers: Internal faults or excessive current draw cause fuses to blow or circuit breakers to trip.

  • Drive Faults: General drive fault errors indicating internal component failures or operational issues.

  • Encoder Faults: Problems with the encoder feedback signal, leading to inaccurate motor control.

  • IGBT Failures: Insulated Gate Bipolar Transistor (IGBT) failures, which are critical components for power switching.

  • Capacitor Failures: Degradation or failure of capacitors, affecting the inverter's ability to store and deliver energy.

  • Display Issues: Problems with the inverter's display screen, making it difficult to monitor parameters and troubleshoot issues.

  • Parameter Corruption: Loss or corruption of programmed parameters, requiring reconfiguration.

  • Ground Faults: Detection of current leakage to ground, indicating insulation breakdown or wiring issues.

  • Motor Overload: The inverter detects that the motor is drawing excessive current, potentially damaging the motor or the inverter itself.


Our Emerson Inverter Repair Process

Roc Industrial LLC follows a meticulous and comprehensive repair process to ensure the highest quality Emerson inverter repairs. Our process includes:

  1. Free Evaluation and Quote: We begin with a free evaluation of your faulty Emerson inverter. Our technicians thoroughly assess the unit to identify the root cause of the problem. Based on our findings, we provide you with a detailed repair quote, outlining the necessary repairs and associated costs.

  2. Shipping Instructions: Once you approve the quote, we provide clear and concise shipping instructions to ensure your inverter arrives safely at our repair facility. We can also arrange for expedited shipping if needed.

  3. Diagnosis Using Specialized Test Equipment: Upon receiving your inverter, our skilled technicians use advanced diagnostic equipment to confirm the initial assessment and identify any additional issues. We utilize specialized Emerson inverter testing equipment to simulate real-world operating conditions and pinpoint even the most elusive problems.

  4. Component-Level Repair and Replacement: We perform component-level repairs, replacing faulty components with high-quality replacements. Our extensive inventory of Emerson inverter parts allows us to expedite the repair process and minimize downtime. We source only genuine or equivalent components to ensure optimal performance and reliability.

  5. Load Testing and Quality Checks: After completing the repairs, we subject the inverter to rigorous load testing to verify its performance under various operating conditions. We conduct thorough quality checks to ensure that all parameters are within acceptable limits and that the inverter meets or exceeds original specifications.

  6. Warranty-Backed Return and Support: We stand behind our work with a comprehensive warranty. Your repaired Emerson inverter is carefully packaged and returned to you, along with detailed documentation of the repairs performed. Our dedicated customer support team is available to answer any questions and provide ongoing assistance.


Nationwide Repair Services

Roc Industrial LLC provides Emerson inverter repair services to customers nationwide. Whether you are located in New York, Los Angeles, Chicago, Houston, Dallas, or any other city across the United States, we can help. We offer fast shipping options and quick turnaround times to minimize downtime and keep your operations running smoothly.


We understand the urgency of getting your equipment back online. That's why we offer expedited repair services and work diligently to provide the fastest possible turnaround times. Our nationwide network allows us to efficiently serve customers across the country, providing reliable Emerson inverter repair solutions wherever you are located.



Why Choose Roc Industrial LLC?

When you choose Roc Industrial LLC for your Emerson inverter repair needs, you benefit from:

  • 30+ Years of Experience: With over three decades of experience in industrial electronic repair, we have the knowledge and expertise to handle even the most complex Emerson inverter repairs.

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

  • Thousands of Parts in Stock: Our extensive inventory of Emerson inverter 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 online and offer fast turnaround times, often with same-day service available.

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

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

Don't let a faulty Emerson inverter slow down your operations. Contact Roc Industrial LLC today for a free evaluation and fast, reliable Emerson inverter repair.

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