Product Description
The ABB ACS355-03U-44A0-4+N826 is a robust and versatile general purpose drive designed for a wide array of industrial applications. This drive provides precise motor control, energy efficiency, and seamless integration into existing automation systems. It features advanced sensorless vector control, offering superior performance across various load conditions. The integrated EMC filter and braking chopper ensure compliance with stringent regulatory standards and enable efficient braking. Its compact design and user-friendly interface simplify installation, commissioning, and operation. The drive's comprehensive protection features, including overcurrent, overvoltage, and thermal overload protection, guarantee reliable and safe operation. The ACS355-03U-44A0-4+N826 delivers exceptional performance and reliability, making it an ideal solution for demanding industrial environments.
Is Your Device Showing These Signs?
ABB ACS355-03U-44A0-4+N826 drives commonly exhibit faults related to DC bus overvoltage or undervoltage, requiring inspection of input power quality and capacitor bank health. Overcurrent trips are frequently traced to motor insulation breakdown, incorrect motor parameters programmed in the drive, or IGBT failures within the inverter section. Communication errors on the fieldbus, specifically with the +N826 option, necessitate verification of cabling, termination resistors, and network configuration settings. Parameter corruption in the drive's memory sometimes leads to erratic behavior, mandating a factory reset and reprogramming. Cooling fan failures cause overheating and thermal trips, demanding fan replacement to maintain proper heat dissipation.
Technical specifications
The ABB ACS355-03U-44A0-4+N826 is a robust, general-purpose AC drive designed for machinery applications requiring precise motor control and energy efficiency. This drive operates on a three-phase, 380-480V AC power supply and delivers a continuous output current of 44.0 Amperes, suitable for motors up to 22kW (30HP). It features sensorless vector control, providing accurate torque and speed regulation across a wide range of operating conditions. Integrated functionalities include PID control, brake chopper, and EMC filter (C3 environment) for streamlined installation and reduced system costs. The +N826 option designates a specific configuration with pre-programmed application macros, simplifying commissioning for common uses such as pumps, fans, and conveyors. The drive supports various communication protocols, including Modbus RTU, enabling seamless integration into automation systems. It is enclosed in a compact, IP20-rated housing for protection against dust and solid objects, ensuring reliable performance in industrial environments.
Our Repair Process for the
ACS355-03U-44A0-4+N826
Our repair process for ABB ACS355-03U-44A0-4+N826 drives begins with a thorough inspection of input power quality and capacitor bank health when DC bus overvoltage or undervoltage faults are present. Overcurrent trips initiate investigation into motor insulation, programmed motor parameters, and IGBT integrity. Communication errors with the +N826 option require verification of cabling, termination resistors, and network configuration. Parameter corruption necessitates a factory reset and complete reprogramming of the drive. Overheating issues trigger immediate cooling fan replacement to restore 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.

















