Product Description
The Mitsubishi MR-J2S-22KB-PX078 servo drive, a 22kW unit for demanding industrial use, accepts 200-230VAC input and delivers 170V output at 126A. It requires 95A input current with a 235A main circuit inrush and 30A control circuit inrush. Weighing 16kg and using M10 mounting screws, it needs 167-209 sq ft for heat dissipation (depending on the servo motor). Tightening torque is 234.55 lb-in, and power supply capacity should be 30-37.6 kVA (depending on the servo motor). With an external dynamic brake, it supports a load-inertia moment ratio up to 30 times, ensuring robust performance with proper thermal management in industrial settings.
Is Your Device Showing These Signs?
Mitsubishi MR-J2S-22KB-PX078 servo amplifier failures commonly involve power module IGBT failures, requiring replacement to restore drive functionality. Overcurrent faults and alarms often stem from damaged braking resistors or shorted motor windings, necessitating component inspection and replacement. Communication errors, such as those related to the CN1A or CN1B connectors, demand thorough wiring checks and connector repair or replacement. Parameter corruption within the EEPROM is resolved through reprogramming with the correct motor and system parameters. Overheating issues are addressed by inspecting and replacing cooling fans or heat sinks to maintain thermal management.
Technical specifications
The Mitsubishi MR-J2S-22KB-PX078 is a 22kW servo drive for industrial applications, accepting 200-230VAC input and outputting 170V at 126A. It requires 95A input current, with significant inrush currents. Weighing 16kg, it needs specific heat dissipation area and torque, plus a 30-37.6 kVA power supply. It supports a load-inertia moment ratio up to 30 times with an external dynamic brake.
Our Repair Process for the
MR-J2S-22KB-PX078
Our repair process for Mitsubishi MR-J2S-22KB-PX078 servo amplifiers begins with diagnosing the fault, which commonly involves identifying failed IGBTs within the power module, requiring immediate replacement. Overcurrent faults are addressed by inspecting and replacing damaged braking resistors or addressing shorted motor windings. Communication errors related to CN1A or CN1B connectors necessitate thorough wiring checks and connector repair or replacement. Parameter corruption within the EEPROM is resolved through reprogramming using the correct motor and system parameters. Overheating issues are corrected by inspecting and replacing faulty cooling fans or heat sinks to ensure proper thermal management.
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.

















