Emergency: same day
For a line-down motor, where the fault and parts allow. WhatsApp us before you send it so the bench is kept free.
Fanuc · Servo amplifier repair · India
Fanuc servo amplifier repair in India: αi, βi, SVM and SPM
When a Fanuc axis drops out, the CNC shows an SV alarm and the amplifier in the cabinet shows a status LED or 7-segment code. Before you order a new module, it is worth knowing whether the fault is in the amplifier, the power supply, the cable, or the servo motor itself.
We are a multi-brand servo motor repair company. Fanuc αi, βi, SVM, SPM and matching α / β series motors are repaired at our Puducherry, Chennai and Bengaluru sites. Star Automations has done this work since 2000. We are an independent multi-brand repair company, not affiliated with Fanuc.
WhatsApp a clear photo of the amplifier nameplate (A06B-…) and the alarm or LED status to +91 97866 22233. We confirm repairability before you courier.
- 25+years of servo repair, since 2000
- 3,000+customers across India
- 100+servo brands covered by our universal servo motor test equipment
- 5sites: Puducherry, Chennai, Bengaluru, Hyderabad, Delhi
- Same dayemergency repair option*
*Where the fault and parts allow. Every repaired unit returns with a printed test report.
Repair turnaround you can plan around
Send a photo of the nameplate first. We confirm whether the motor is repairable, and the quote, the same working day.
Urgent: 3 working days
Repair, encoder alignment and test, counted from the day the motor reaches the bench and the quote is approved.
Standard: 7 working days
Full repair, encoder alignment, run test under load and a printed test report.
- Free repairability check from a nameplate photo
- Printed test report with every motor
- Written warranty, terms stated on every quotation
- Pickup can be arranged; parts that must be imported are quoted with their own timeline
01Models
Fanuc amplifiers and modules we repair
Send the full A06B part number from the label. If your model is not listed, ask on WhatsApp and we check before you ship.
- αi series servo amplifiers: αiSV single, two and three-axis modules
- βi series: βiSV / βiSVM amplifiers used on smaller axes and secondary axes
- SVM / SVU: servo amplifier modules in α and αi racks
- SPM: spindle amplifier modules (αiSP and related), see the Fanuc spindle drive alarm list
- Power supply modules: PSM / αiPS that feed the DC link for the amplifier row
- Earlier α and β series amplifiers still running on older CNC machines
Matching motors (α, αi, β, βi) and Pulsecoders are repaired on the same bench: see Fanuc servo motor repair.
02Cues
Common LED and status cues: practical first checks
These are technician cues from the bench, not a copy of the OEM manuals. Always confirm against the manual for your control and amplifier.
| Cue | What it usually means | Motor or amplifier? |
|---|---|---|
| Overcurrent or IPM trip alarm | Short or earth fault on U/V/W, failed power stage, or a bad power cable | Often the motor winding or cable first; the amplifier if it trips with the motor leads off |
| Overheat / heat-sink fan stop | Blocked cabinet airflow, failed fan, sustained overload | Drive and cabinet; check motor load and brake drag too |
| Low voltage / DC link low | Incoming AC, PSM output, bus bars, 24 V control supply | Supply or PSM more often than a single SVM |
| Encoder, serial feedback or Pulsecoder alarms (for example SV0368) | Feedback cable, connector or Pulsecoder | Often the motor encoder, not the amplifier |
| FSSB / fibre link alarm | Fibre between modules or to the CNC | Network or cable |
| No display / not ready | Control board, switch-mode supply, or missing 24 V / main power | Amplifier or supply |
For spindle amplifier codes, see the Fanuc spindle drive alarm list.
03Bench
What we do on the bench
- Photo triage: nameplate and alarm/LED photo on WhatsApp before the unit leaves your plant.
- Component-level repair: power stage (IGBT / IPM), DC bus capacitors, cooling fans, control board, gate drivers and related power-supply faults where parts allow.
- Motor-side check when the cue points there: insulation and winding on U/V/W, Pulsecoder and feedback check, brake and bearings on the matching servo motor.
- Load and no-load test: repaired amplifiers are powered on a test rig and, where applicable, run with a servo motor under load.
- Printed test report: every repaired unit returns with a printed report of what was found and what was tested.
After inspection you get a clear quote before any work starts.
04Motor
When it is really the servo motor
Swapping the amplifier is the most common first move, and often the wrong one. These cues point to the servo motor or its Pulsecoder more often than the amplifier:
- Overcurrent or IPM alarm with the motor leads connected: megger U, V, W to earth with the cable disconnected from the amplifier. A low reading means winding insulation has failed (coolant, oil, a crushed drag-chain cable). Replacing the amplifier on a shorted motor usually destroys the new one too.
- Serial data, Pulsecoder or feedback alarms: if a known-good feedback cable does not clear it, the Pulsecoder on the motor needs inspection and often replacement with correct alignment.
- Soft thermal, overload or following-error trips: check mechanical drag, a sticking brake, tight gibs or ballscrew, and bearings before blaming the amplifier.
- Recurring trips after a “new” amplifier: the motor or cable was the original cause.
If the motor is the problem, it can usually be repaired: bearings, brake, seals, Pulsecoder or encoder, and windings where needed, then load-tested on our servo bench. See how to check an AC servo motor, multi-brand servo motor repair, Fanuc servo motor repair and Fanuc Pulsecoder repair.
05Send
How to send a Fanuc amplifier
- WhatsApp a clear photo of the nameplate (A06B-…) and the alarm number or LED / 7-segment status, plus what the machine was doing when it failed, to +91 97866 22233.
- We say whether it looks repairable and whether you should also send the matching servo motor.
- Courier to any of our three sites, or ask us to arrange pickup.
- Bench inspection and a written quote before work starts. We quote after inspection, not from a nameplate alone.
- Repair, load or no-load test where applicable, printed report, and dispatch.
Related: servo drive and amplifier repair · Fanuc servo drive repair · Servo motor repair Bangalore · Servo motor repair Chennai · Servo motor repair Puducherry
→How it works
From nameplate photo to a tested motor in 7 steps
One route for servo motors, encoders and drives. You see the price before any work starts, and the report before the unit leaves our bench.
- 1 · Nameplate photoSend it on WhatsApp or the form
- 2 · Repairable? QuoteUsually the same working day
- 3 · Courier or pickupThe unit reaches our bench
- 4 · Bench diagnosisInsulation, windings, brake, encoder
- 5 · RepairFailed parts, bearings, seals, brake
- 6 · Align and run-testEncoder aligned; no-load and load run
- 7 · Report and dispatchPrinted test report with the unit
- Line down?Servo Swap ships a tested unit first. How Servo Swap works
EmergencySame day*
Urgent3 working days
Standard7 working days
*Where the fault and parts allow. Turnaround counts from when the unit reaches our bench and the quote is approved.
06FAQ
Fanuc amplifier repair questions
Do you repair Fanuc αi and βi servo amplifiers in India?
Yes. αiSV, βiSV / βiSVM, SVM, SPM and PSM / αiPS modules are repaired at component level at our Puducherry, Chennai and Bengaluru sites and, where applicable, run with a servo motor under load.
Are you affiliated with Fanuc?
No. Star Automations is an independent multi-brand repair company. The Fanuc name only describes the equipment we repair. We are not an OEM service centre and are not affiliated with Fanuc.
How long does Fanuc amplifier repair take?
We quote after inspection, not from a photo alone. Simple fan, capacitor or connector jobs can be fast; power-stage and control-board work depends on parts. You approve the quote before repair starts.
What should I send for a quote?
A clear nameplate photo with the A06B number, the CNC alarm number and/or the amplifier LED or 7-segment status, and a short note on what the machine was doing when it failed. If the cue points to feedback or overcurrent, send the matching motor nameplate too, or the motor itself.
When is the fault in the servo motor rather than the amplifier?
Overcurrent or IPM trips with the motor connected, Pulsecoder or serial feedback alarms that survive a known-good cable, and overload or following-error trips with mechanical drag usually point to the motor, cable or machine.
Do you test repaired amplifiers?
Yes. Units are powered on a test rig; where applicable they are run with a servo motor under load and returned with a printed test report.
Which locations do you cover?
Repair and testing are done at our Puducherry, Chennai and Bengaluru sites. Units can be couriered from anywhere in India after we confirm repairability on WhatsApp.
Do you also repair Fanuc spindle amplifiers (SPM) and power supplies (PSM)?
Yes. Spindle amplifier modules and the power supply modules that feed the DC link are repaired on the same bench when parts and the fault allow. Send the A06B label and the symptom.
Fanuc, αi, βi and related model names are trademarks of their owner. Star Automations is an independent multi-brand repair company and is not affiliated with Fanuc. Status cues above are practical technician guidance; always confirm against the manual for your exact control and amplifier.
Send the amplifier label and the alarm.
WhatsApp a nameplate photo and the alarm to +91 97866 22233, or email info@starautomations.com.