Yaskawa Sigma-7 SERVOPACK Repair
The Yaskawa Sigma-7 SERVOPACK is a motion-control drive used to regulate servo motor speed, torque, and position in high-precision industrial machinery.
| Brand | Yaskawa |
| Equipment | SGD7S-1R6A00A |
| Equipment Category | Sigma-7 SERVOPACK |
| Industry | Pharma |
| Fault Reported |
|
| Repair Turnaround Time | Typical reference: 3–6 working days |
The Challenge
Loss of the servo axis stopped accurate machine movement and prevented normal production cycles.
Diagnosis
- The DC bus, IGBT stage, driver board, current feedback, encoder interface, control power, communication circuitry, and cooling system were evaluated.
Our Solution
- Failed electronic components were replaced where required, PCB defects and solder joints were restored, cooling was serviced, and the drive was tested with compatible feedback or motor simulation.
1. BEFORE
2. DISASSEMBLY
3. INSPECTION
4. FUNCTIONAL TESTING
Testing Performed
- Power-up test; DC-bus test; power-stage test; encoder/feedback test; communication test; axis enable test; thermal burn-in.
Final Result
The reference repair process restores normal functional operation after the unit passes the defined electrical, communication, motion, or load checks applicable to the equipment.
Common Fault Codes & Causes
- A.100 – Overcurrent detected: Power transistor overcurrent/overheat, motor/cable short or power-stage issue.
- A.101 – Motor overcurrent detected: Motor current exceeded allowable value; overload, jam, motor/cable fault.
- A.300 – Regeneration error: Regeneration circuit/resistor or regenerative energy issue.
- A.320 – Regenerative overload: Excessive regenerative duty or undersized/brake resistor issue.
- A.400 – Overvoltage: Main-circuit DC voltage too high; supply/regeneration/deceleration issue.
- A.410 – Undervoltage: Main-circuit DC voltage too low; supply/phase/input issue.
- A.510 – Overspeed: Motor exceeded maximum speed; command, tuning or feedback problem.
- A.710 – Instantaneous overload: Large short-duration torque overload, brake not released or mechanical jam.
- A.720 – Continuous overload: Sustained torque/load above motor rating or inadequate thermal conditions.
- A.810 – Encoder backup alarm: Encoder power loss or encoder backup/absolute data problem.
Preventive Maintenance
- Inspect motor and feedback cables, maintain cabinet cooling, prevent overloads, check grounding, and investigate repeated fault codes before continued operation.
Related Services
- Industrial Electronics Repair; Servo Motor Repair; Servo Drive Repair; PLC/HMI/VFD Repair; PCB Repair
Need Professional Repair?
Yaskawa Sigma-7 SERVOPACK repair in Egypt for A.100, A.101, A.300 and other common faults. Professional diagnosis, repair and testing by EISAC Automation.
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REPAIR • TEST • RESTORE
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