Repair
Repair Price: $ 1,844.00
Purchase
CSL Part Number: 73450
Product Overview: The ACS350-03U-31A0-4 is a 20 HP three-phase AC variable frequency drive rated for 440VAC operation, designed to control motor speed and torque in industrial applications. Manufactured by ABB, this drive provides precise motor control for pumps, fans, conveyors, and general machinery. It features adjustable frequency and voltage output, built-in protections, and configurable parameters for various motor types. The ACS 350 series is available in both single-phase and three-phase input configurations to accommodate different power supply requirements.
Category: AC Motor Controls
Manufacturer: ABB
Manufacturer Synonyms: ASEA BROWN BOVERI
Alternate Manufacturer Names: ABB Drives
Manufacturer Part Number: ACS350-03U-31A0-4
Series: ACS 350 Series AC Drive
Other Synonyms: ABB Drives
Common Failures
Units submitted for repair have shown issues with the power module, including shorted diodes, open resistors, and blown fuses. These issues are often related to the phase gating circuit and may involve opto-isolator amplifiers or supply voltage loss.
Repair Approach
The repair process typically involves replacing defective components within the power module, which may include diodes, resistors, fuses, and opto-isolators. Our technicians identify and address faulty parts within the affected circuit to restore functionality.
Testing & Quality
After repairs are completed, units are tested with a 7.5HP motor for over four hours to verify proper functionality before return shipment.
Service and repair your broken ABB part
We can repair your ABB model ACS350-03U-31A0-4 in our facility. Let our skilled technicians get your ABB back in operation quickly.
Step 1 - Click the green 'Repair Now' button above to add the part and then complete the RMA.
Step 2 - The RMA form will be sent to you via email. Print the RMA form and put it in a box with the item(s) for repair.
Step 3 - Ship or mail the box to the address listed on the RMA.
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