Product Description
The Allen-Bradley 20G1AJF370JN0NNNNN PowerFlex 755 AC drive, designed for demanding 690V AC/932V DC power management applications, offers IP54/NEMA Type 12 environmental protection, simplified AC input with precharge (no DC terminals), and supports frame sizes 6-10. While not UL listed, it features integrated filtering, a jumper-connected common mode capacitor, and a standard RAL 7032 cabinet (800mm deep), but lacks internal resistors or transistors.
Is Your Device Showing These Signs?
The Allen Bradley 20G1AJF370JN0NNNNN PowerFlex 755 AC drive commonly experiences issues such as IGBT failures, capacitor degradation leading to DC bus undervoltage faults, and encoder feedback problems causing erratic motor control. Communication faults on the Ethernet/IP network and excessive current draw due to motor insulation breakdown are also frequent. Firmware corruption necessitates reprogramming, and cooling fan malfunctions result in overheating and drive tripping. Resolving these problems ensures optimal performance and extends the lifespan of the variable frequency drive.
Technical specifications
The Allen-Bradley 20G1AJF370JN0NNNNN PowerFlex 755 AC drive is a 690V AC/932V DC drive with IP54/NEMA Type 12 protection and simplified AC input (no DC terminals). It supports frame sizes 6-10, includes integrated filtering and a common mode capacitor, and comes in a standard RAL 7032 cabinet (800mm deep). It is not UL listed and lacks internal resistors/transistors.
Our Repair Process for the
20G1AJF370JN0NNNNN
Our repair process for the Allen Bradley 20G1AJF370JN0NNNNN PowerFlex 755 AC drive begins with a comprehensive diagnostic evaluation to pinpoint the failure. This includes a thorough inspection of IGBTs, capacitors, encoder feedback systems, and cooling fans. We address DC bus undervoltage faults resulting from capacitor degradation with component replacement. Encoder feedback problems are resolved through sensor repair or replacement, ensuring accurate motor control. Communication faults on the Ethernet/IP network are systematically troubleshooted and corrected. Excessive current draw issues are addressed by identifying and rectifying motor insulation breakdowns. Firmware corruption is resolved through reprogramming to the latest stable version. Malfunctioning cooling fans are replaced to prevent overheating and drive tripping, ensuring optimal performance and extended lifespan of the variable frequency drive.
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.

















