Product Description
The Mitsubishi MR-J4-15KA4 servo drive, designed for precise automation control, features forced ventilation cooling and operates from 0 to 55 C. This 15 kW unit, with a 41A rated current, measures 15.75" x 8.66" x 10.24", uses 380-480V AC 3-phase input, and includes 2 analog inputs/outputs, 9 digital inputs, and 5 digital outputs. It offers dynamic braking, tolerates storage temperatures from -20 to 65 C, communicates via RS-422/RS-485, and consumes 45W, ensuring energy-efficient, reliable performance.
Is Your Device Showing These Signs?
The Mitsubishi MR-J4-15KA4 AC servo amplifier commonly experiences issues such as overcurrent faults stemming from shorted motor windings or IGBT failures within the power module. Parameter corruption in the internal EEPROM necessitates reprogramming, while communication errors arise from faulty CN1A/CN1B connectors or corrupted SSCNET III/H fiber optic cables. Overheating due to inadequate heatsink cooling or excessive load demands result in thermal trips. Resolve these issues through motor winding insulation tests, IGBT replacement, parameter restoration via MR Configurator2 software, connector/cable inspection and replacement, and improved cooling solutions.
Technical specifications
The Mitsubishi MR-J4-15KA4 is a 15kW servo drive with forced ventilation, operating from 0-55C, utilizing 380-480V AC 3-phase input and offering multiple analog/digital I/O. It features dynamic braking, RS-422/RS-485 communication, and consumes 45W.
Our Repair Process for the
MR-J4-15KA4
Our repair process for the Mitsubishi MR-J4-15KA4 AC servo amplifier begins with a thorough assessment to pinpoint the fault's origin. Suspected motor winding issues are verified through insulation tests, and shorted windings necessitate motor replacement or rewind. IGBT failures within the power module require immediate replacement with verified components. Parameter corruption is rectified by reprogramming the internal EEPROM using MR Configurator2 software, ensuring correct operational parameters. Communication errors are addressed by meticulously inspecting and replacing faulty CN1A/CN1B connectors or corrupted SSCNET III/H fiber optic cables. Overheating problems are resolved by improving heatsink cooling efficiency and verifying that load demands remain within the amplifier's specified limits, preventing thermal trips.
Your Guarantee: Warranty & Lifetime Support
Your satisfaction is our top priority, and we confidently stand behind the quality of our repairs. That's why every repair service is covered by our comprehensive 24-month warranty. Furthermore, we offer lifetime phone support – if you have questions or need assistance related to our repair down the road, we're here to help. Our service commitment is straightforward: we guarantee our work, and if you're not satisfied, we will make it right. Learn More about our Repair process.
Comprehensive Repairs You Can Depend On
We take immense pride in the quality and reliability of our work. Our process goes beyond simply fixing the immediate problem. We perform a comprehensive inspection of your main board (or other equipment) and proactively replace components known to be failure-prone or showing signs of potential future failure. Before any item is returned, it undergoes rigorous functional testing to ensure it meets performance specifications and operates flawlessly. Visit our main Repair Services page to learn more.
Save Significantly
Our primary goal is to save you hundreds, or even thousands, of dollars compared to the cost of new equipment replacement. By repairing existing components, we provide an economical solution that is also eco-friendly. At Roc Industrial, our commitment to integrity and community drives our consistent growth and ensures you receive a reliable, cost-effective solution.


Please Note: Roc Industrial operates as an independent service provider and is not an authorized distributor for the manufacturers or brands mentioned. Consequently, the original manufacturer's warranty is not applicable to items repaired or sold by us. Roc Industrial provides its own 2-year warranty on all repair services performed.
Buying Options
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Ships from Rochester, NY