Product Description
The Mitsubishi FR-A740-00310-N6 is a 15 kW (20 HP) variable frequency drive designed for efficient 3-phase motor control with 380-480V AC input, 50/60 Hz operation, PWM control, 150% overload capacity for 60 seconds, forced air cooling, and an IP20-rated enclosure.
Is Your Device Showing These Signs?
The Mitsubishi FR-A740-00310-N6 AC drive commonly experiences issues such as overcurrent faults stemming from IGBT failures or shorted motor windings, requiring component replacement or motor repair. Overvoltage trips are often attributed to regenerative energy during deceleration, necessitating adjustments to braking resistors or deceleration parameters. Communication errors on the network, specifically with protocols like Modbus RTU or Ethernet/IP, demand troubleshooting of cabling, addressing conflicts, or PLC configuration. Parameter corruption due to power surges or electrical noise results in erratic motor behavior, mandating a parameter reset and careful reprogramming. Lastly, cooling fan failures lead to overheating and thermal trips, necessitating fan replacement to maintain proper drive operation.
Technical specifications
The Mitsubishi FR-A740-00310-N6 is a 15 kW (20 HP) VFD for 3-phase motors, featuring 380-480V AC input, PWM control, 150% overload capacity, forced air cooling, and an IP20 enclosure.
Our Repair Process for the
FR-A740-00310-N6
Our repair process for the Mitsubishi FR-A740-00310-N6 AC drive begins with a comprehensive diagnostic evaluation to pinpoint the failure. Overcurrent faults require immediate inspection and replacement of faulty IGBTs or repair of shorted motor windings. Overvoltage trips are addressed by adjusting braking resistors or modifying deceleration parameters to manage regenerative energy. Communication errors are resolved through thorough troubleshooting of cabling, resolution of addressing conflicts, and verification of PLC configuration. Parameter corruption necessitates a complete parameter reset followed by meticulous reprogramming. Overheating issues are rectified by replacing failed cooling fans to restore proper thermal management and prevent 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.

















