Fanuc · CNC parts
A06B-6124-H109 — alpha iSV servo amplifier module: fault codes, repair & supply
The A06B-6124-H109 is a Fanuc alpha iSV servo amplifier module used on current CNC machines. Star Automations sources and supplies the A06B-6124-H109 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 Fanuc alpha i SV servo amplifier 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 |
|---|---|---|
| SV0401 | V-ready off | DC link not ready: power supply module not on, e-stop circuit open, or failed amplifier |
| SV0430 | Servo motor overheat | Overloaded axis, blocked cooling, motor thermistor or cable fault |
| SV0436 | Software thermal (OVC) | Axis overloaded, brake dragging, or parameter mismatch |
| SV0453 | Pulsecoder soft disconnect | Encoder cable, connector or pulsecoder fault |
| SV0460 | FSSB disconnect | Optical cable or amplifier communication problem |
| SV0600 | Inverter DC link overcurrent | Failed power stage, motor winding or cable short |
| SV0601 | Inverter radiator fan stopped | Seized or dirty cooling fan |
| SV0602 | Inverter overheat | Blocked airflow, high ambient temperature, failed fan |
When a A06B-6124-H109 needs attention
- Axis alarm on power-up or at first move
- Amplifier status LED showing an alarm
- Burn marks or blown fuse
- Overheating or fan not running
- Intermittent axis fault
Replace or repair your A06B-6124-H109
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.
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A06B-6124-H109 — common questions
Can you supply the A06B-6124-H109 in India?
Can a faulty A06B-6124-H109 be repaired instead of replaced?
My A06B-6124-H109 shows SV0401 (v-ready off). What should I do?
Is the exact part number important?
Need the A06B-6124-H109 now?
Send the part number or fault code — we reply the same day. Serving Chennai, Puducherry, Bengaluru, Hyderabad, Delhi and pan-India.