Yaskawa Drive & Servopack Repair Services
Signs of a failing Yaskawa drive or servopack
Yaskawa servo and drive failures show up as fault stops, nuisance trips, motor stalls, unexplained torque loss, unstable positioning, or a unit that will not power up at all. On Sigma-II SERVOPACKs, watch for A.02 (parameter or EEPROM data breakdown), A.10 (IGBT overcurrent or overheated heat sink), A.30/A.32 (regeneration error or regenerative overload), A.40/A.41 (main-circuit DC-bus over- or under-voltage), A.51 (overspeed), A.71/A.72 (high-load or continuous low-load overload), A.73 (dynamic-brake overload), and A.74 (surge-current-limit resistor overload). Sigma-V units report related codes A.300, A.320, A.330, A.521, A.810, and A.820. Sigma-7 SERVOPACKs display A.042, A.730, A.400, and A.bF1. On AC drives, technicians often see repeated overcurrent or overvoltage faults, a dead keypad, blown fuses, or a fan that has stopped. Motoman controllers may log alarm 4969, an input-power frequency error, on DX100 and DX200 systems.
How we repair Yaskawa drives and servopacks
Repair starts with identifying the exact amplifier model, motor/encoder pairing, drive model, voltage class, capacity, and software or option-board configuration before any component is touched. Technicians inspect the power stage, regenerative path, feedback or encoder interface, control electronics, alarm history, parameter memory, and connectors rather than swapping only the part that looks damaged. Typical work includes replacing failed power semiconductors, gate-drive circuitry, DC-bus capacitors, relays and contactors, braking components, low-voltage power supplies, cooling fans, connectors, and damaged circuit boards.
Models and part families we repair include:
- Yaskawa Sigma-II, Sigma-V, and Sigma-7 SERVOPACKs
- Yaskawa A1000, GA500, GA700, GA800, V1000, and J1000 AC drives/VFDs
- Motoman DX100, DX200, and YRC1000 controller amplifiers and power assemblies
Because a visually similar drive is not necessarily a compatible substitute, part numbers, firmware, and parameter data are confirmed before reassembly.
Testing and verification before a unit ships
Before a repaired Yaskawa drive or servopack ships, it goes through a controlled power-up with alarm and I/O verification, parameter loading or validation, and command-response checks. Where a compatible motor and feedback device are available, the unit runs under real command signals rather than just idling. A load test or dynamometer test verifies current draw, torque production, speed regulation, acceleration and deceleration behavior, regeneration, and thermal performance under representative load. For AC drives, this includes DC-bus and gate-drive verification, low-voltage I/O checks, fault-history review, and a motor run at appropriate voltage, frequency, and load, confirming acceleration, deceleration, current balance, protection behavior, and heat rise. A burn-in period under monitored operating conditions is used to expose intermittent thermal, power-supply, fan, solder-joint, or communication faults that a short bench test would miss. For Motoman amplifiers, verification also covers servo-on operation, encoder and brake checks, axis jogs, and mastering or calibration status before controlled robot motion.
Preventing Yaskawa drive and servo failures
Many Yaskawa drive and servo failures trace back to preventable stress rather than random component defects. Electrolytic capacitors, cooling fans, relays, braking resistors, and power semiconductors are wear- and stress-sensitive; heat, ripple current, overload, and regeneration duty shorten their service life. Preventive steps include keeping control cabinets clean and cool, maintaining fan and filter airflow, tightening power and motor terminals to specification, inspecting DC-bus and braking components, checking grounding and cable insulation, and avoiding unnecessary rapid power cycling.
Common failure causes worth trending include sustained overload, shorted or grounded motor wiring, blocked airflow, high ambient temperature, contamination, phase imbalance, voltage transients, and repeated power cycling. Watch for rising fault frequency, intermittent nuisance trips, growing fan noise or vibration, discoloration around terminals, and any alarm history showing repeated overvoltage, overcurrent, or overload events. Yaskawa manuals note that the underlying cause should be corrected before resetting an alarm; resetting without correction allows the fault to recur.
Repair versus replacement for Yaskawa equipment
A drive or servopack failure stops production immediately, and the cost of downtime often outweighs the cost of the repair itself. New-unit lead times can run long, and for older equipment such as Sigma-II SERVOPACKs, A1000, V1000, or J1000 drives, and DX100/DX200 controllers, OEM replacement stock, compatible firmware revisions, and option boards are not always available. Repair can preserve the original unit’s parameters, option hardware, connectors, and machine-specific integration, which matters when a machine builder configured the drive for a particular application.
Repair turnaround depends on model rarity, parts availability, the extent of board damage, whether test motors or robot test equipment are required, and whether a replacement board or complete unit exists to swap in during testing. When a suitable direct replacement is unavailable or would require re-engineering the parameter set, repairing the original drive is often the more practical path back to running production.
Why choose Robotics Integration for Yaskawa repair
Robotics Integration works across Yaskawa Sigma-II, Sigma-V, and Sigma-7 SERVOPACKs, A1000/GA500/GA700/GA800/V1000/J1000 AC drives, and Motoman DX100/DX200/YRC1000 controller amplifiers, along with other industrial robotics and motion-control brands. Units can be sent in for repair-and-return service, and on-site support is available for troubleshooting, installation, or verification when a drive cannot be pulled and shipped.
Quoting starts with the information on the equipment nameplate and the failure symptoms: manufacturer, model and part number, serial number, alarm code or fault history, and a description of what the equipment was doing when it failed. That information lets a technician give an assessment of likely failure areas and next steps before committing to teardown, and photos of the unit and any visible damage speed up the initial review.
Request a Yaskawa drive repair quote
To get a repair quote on a Yaskawa drive, servopack, or Motoman amplifier, send the manufacturer, full model and part number, and serial number if available. Include the alarm or fault code displayed, a description of the symptoms leading up to the failure, and whether the unit powers on at all. Photos of the nameplate, connectors, and any visible damage such as burned components, corrosion, or cracked boards help with an accurate assessment before the unit arrives.
Call 1-602-449-1556 to discuss a Sigma SERVOPACK, A1000/GA700/V1000-series drive, or Motoman DX100/DX200/YRC1000 amplifier that is down or showing intermittent faults. A technician can walk through the alarm code, ask about the application, and outline what a repair evaluation will involve.
Talk A Robotics Integrator
By submitting this form, you agree to receive communications via phone, text message, and email. Message and data rates may apply. Your information may be shared with trusted third-party service providers solely for the purpose of helping you explore Section Robotic Intergration options. You also agree to our Privacy Policy and Terms of Service.
+1 602-449-1556
Success Stories: See What Business Have To Say About Robotics Integration
4.7 Customer Reviews
