Yaskawa · Servo motors
SGM7J-04A7A6E — Yaskawa Sigma-7 SGM7J servomotor (400 W): fault codes, repair & supply
The SGM7J-04A7A6E is a 400 W Yaskawa Sigma-7 rotary servomotor. Star Automations sources and supplies the SGM7J-04A7A6E and repairs failed units at component level, so you can choose between a replacement and getting your existing unit restored. This is a current OEM line. Availability and price are confirmed per enquiry. Most quotes come back the same day — send the part number or the fault code on WhatsApp.
Common Yaskawa Sigma-7 servomotor fault codes and what we usually find
Fault code wording can differ by firmware and manual revision — always confirm against the manual for your exact unit. The causes below are typical findings, not a diagnosis of your specific unit.
| Code | Meaning | Typical cause |
|---|---|---|
| A.810 | Encoder backup alarm | Battery or encoder power lost |
| A.820 | Encoder checksum alarm | Encoder memory or encoder fault |
| A.830 | Encoder battery alarm | Battery low or missing |
| A.C90 | Encoder communications error | Encoder cable or encoder fault |
| A.710 | Instantaneous overload | Mechanical binding, motor or brake issue |
| A.720 | Continuous overload | Sustained overload or motor fault |
When a SGM7J-04A7A6E needs attention
- Encoder alarm after power-up
- Axis vibrates, jerks or hunts
- Motor hot or loses torque
- Noise from the bearings
- Brake not releasing
Replace or repair your SGM7J-04A7A6E
Source a replacement
Send the part number. We check sourcing from global surplus and the OEM channel and reply the same day with availability, condition and price. Advance or verified escrow applies.
Repair your existing unit
If sourcing takes longer or you want to keep your configuration, we repair at component level — power stage, gate-drive, control and supply sections — and test before dispatch.
What people look up for the SGM7J-04A7A6E
- Yaskawa Sigma-7 A.C90 encoder error
- Yaskawa Sigma-7 A.810 encoder backup alarm
- SGM7J-04A7A6E repair
- Yaskawa servomotor repair India
- Sigma-7 motor encoder repair
SGM7J-04A7A6E — common questions
Can you supply the SGM7J-04A7A6E in India?
Can a faulty SGM7J-04A7A6E be repaired instead of replaced?
My SGM7J-04A7A6E shows A.810 (encoder backup alarm). What should I do?
Is the exact part number important?
Need the SGM7J-04A7A6E now?
Send the part number or fault code — we reply the same day. Serving Chennai, Puducherry, Bengaluru, Hyderabad, Delhi and pan-India.