23.05.2025 by Viktor Siebert
Experience Report: Tricky A.10 Alarm on Yaskawa SGDH-10AE Servopack
Some time ago, we received two identical Yaskawa SGDH-10AE servo drives for repair. Both occasionally triggered the infamous A.10 alarm – a very common and tricky fault on this series.
The Problem – and Why It’s So Difficult to Catch
The A.10 alarm indicates overcurrent or heatsink overheating. The difficulty lies in its unpredictability: sometimes the units run for weeks flawlessly, then suddenly several breakdowns occur per day.
Yaskawa often only offers replacement, not repair. And when repairs are attempted, the issue often resurfaces quickly. We wanted to do better.
Our Solution: In-Depth Analysis and Preventive Repairs
We analyzed the root causes and developed a deep repair process, including:
- Replacement of over 20 internal components, even preemptively.
- Thorough internal cleaning and inspection.
- Preventive replacement of aging parts.
- Custom parameter setup and testing.
- Load simulation testing on Fanuc-certified test benches.
- Documentation and final verification according to ISO checklists.
Since then, we’ve gained many new customers—often recommended by OEMs impressed with our repair quality.
So Many Versions – We Help You Choose the Right One
There are over 30 versions of the SGDH-10AE. Not all are compatible. We support our clients in choosing a functional replacement and correct parameter setup.
Further information such as price and delivery time for:
Yaskawa SGDH-10AE AC Servopack
More details about our Yaskawa repair expertise can be found here: Yaskawa SIGMA II repairs by Industrypart
Similar models we regularly repair:
SGDH-10AE-OY
SGDH-10DE-OY (400V Type)
SGDH-10AE Technical Data
| Specification | Value |
|---|
| Input Voltage | 3-phase 200–230 V, 50/60 Hz |
| Input Current | 7 A |
| Output Voltage | 3-phase 0–230 V, 0–300 Hz |
| Output Current | 7.6 A |
| Power | 1.0 kW |
| Weight | approx. 2.9 kg |
| Operating Temperature | 0–55 °C |
Alarm Table and Troubleshooting (Excerpt)
| Alarm | Meaning | Solution |
|---|
| A.10 | Overcurrent / Heatsink Overheat | Check for shorts, ensure cooling, inspect IGBT and board |
| A.30 | Regeneration Error | Verify external resistor, replace if necessary |
| A.51 | Overspeed | Check parameters, reduce reference input |
| A.71/72 | High Load – Peak or Continuous | Review load conditions, check for undersized motor |
