Engineer diagnosing an industrial robot fault on-site

SERVICE 01

On-Site Fault Diagnosis

Robot alarms, unusual noise, vibration or drifting accuracy? Our engineers come to you with professional diagnostic equipment and carry out a comprehensive check of the manipulator body, servo system, control cabinet and cabling to pinpoint the exact cause of the fault.

✓Findings explained face to face — the fault cause made clear
✓Repair plan and quotation provided; work starts only after your approval
✓Whatever can be fixed on the spot, we fix on the spot

Book an On-Site Inspection

SERVICE 02

Routine Repair & Maintenance

We handle common issues such as standard parts wear, lubrication failure and cable ageing, restoring stable operation to your equipment before small problems turn into major faults.

✓Standard parts replacement: belts, cables, fans, batteries and more
✓Whole-machine servicing: oil/grease changes and cooling system cleaning
✓Precision calibration: mastering (zero-point calibration) and path accuracy recovery
✓For maintenance schedules, see robot maintenance knowledge

Industrial robot maintenance and commissioning

Repairing circuit boards in a robot control cabinet

SERVICE 03

Full Overhaul · Core Component Repair

For serious issues such as reducer wear, servo motor failure and control cabinet faults, we provide core component replacement and complete machine overhaul. We confirm the scope and cost clearly before repair begins, and after repair we run full-machine test runs — delivery only when performance meets spec.

✓Reducer replacement with assembly and commissioning
✓Servo motor and drive repair or replacement
✓Control cabinet circuit board diagnosis and repair
✓Full system testing after overhaul — handover only when performance meets specification

Note: overhauls involve core components. After inspection, we clearly confirm the scope, timeline and cost of the repair — never a "let's open it up and see" approach.

SERVICE 04

Programming, Commissioning & Teaching

Bringing a new robot into production, switching product types or upgrading your process all demand professional programming and commissioning. Our engineers are familiar with the teach pendants and programming environments of all major brands, helping you complete path teaching and process tuning quickly so production resumes as soon as possible.

✓Teach pendant operation and program writing for all brands
✓Process commissioning for welding, handling, palletising and assembly
✓Production line integration and cycle time optimisation
✓Basic operator training available on request

Robot teaching and programming commissioning

SERVICE 05 / 06

Technical Consulting & Warranty After-Sales

Technical Consulting & Model Selection

Not sure which robot to buy? Wondering whether old equipment is worth repairing? Planning to automate your production line but don't know where to start? We offer consulting on robot selection, production line automation assessment and used equipment valuation — professional advice given from your point of view.

One-to-one expert advice

Warranty & After-Sales Service

All repair and refurbishment projects come with warranty; the scope and duration are confirmed in writing before work begins. We follow up regularly on equipment condition and respond fast if problems arise. We're in this for the long term — our goal is that one repair means lasting peace of mind.

Warranty commitment

COMMON FAULTS

Common Robot Fault Types at a Glance

These are the most frequent robot faults we see in factories — use the table for an initial assessment

Symptom	Common Causes	Components Involved	What We Do
Servo alarms (e.g. SRVO class)	Motor overheating/overload, encoder faults, damaged cables	Servo motor, cables	Diagnose and pinpoint, then repair or replace
Unusual noise or vibration in operation	Reducer wear, insufficient lubrication, mechanical looseness	Reducer, manipulator body	Servicing or reducer replacement
Accuracy drift, path errors	Lost mastering (zero point), mechanical wear, parameter drift	Manipulator body, control cabinet	Mastering and precision calibration
Teach pendant black screen or unresponsive keys	Screen ageing, key damage, communication faults	Teach pendant	Teach pendant repair or replacement
No power-up response, frequent restarts	Power supply module, main board or safety circuit faults	Control cabinet	Circuit-board-level diagnosis and repair
Broken cables, intermittent signals	Fatigue from repeated flexing, cable carrier wear	Body cabling	Cable replacement with improved routing

Note: alarm codes vary by brand. If you're seeing FANUC SRVO-class alarms, see our article "The four-step check for FANUC robot servo alarms". If you're unsure, just call — we can give you a preliminary assessment over the phone first.

WORKFLOW

Repair Service Workflow

1

Phone / Online ConsultationTell us the brand, model and fault

2

On-Site InspectionEngineer arrives and diagnoses

3

Plan & QuoteRepair begins once you confirm

4

Repair / RefurbishmentProfessional workmanship

5

Commissioning & AcceptanceOn-site test run and handover

6

Warranty Follow-UpRegular after-sales check-ins

Pricing policy: we always inspect first, quote second, repair third. If you decide not to proceed after the inspection, only the on-site inspection fee applies — no hidden charges. Exact costs depend on the fault type and parts involved; call us for details.

KNOWLEDGE & BRANDS

Know the faults and brands first — repair with confidence

Per-brand models and typical faults, plus maintenance knowledge — check before you repair

Brand coverage

Common models, typical faults and repair scope for every covered brand — at a glance.

→ View brands

Knowledge base

Practical articles on servo alarms, accuracy loss, periodic maintenance and more.

→ View resources

FRIEND LINKS

Partner Links

Global Top 10 Brands

FANUC

ABB

YASKAWA

KUKA

Kawasaki

EPSON

NACHI

Stäubli

OMRON

Universal Robots

Top 10 Chinese Brands

ESTUN

INOVANCE

SIASUN

EFORT

GSK

STEP

JAKA

ROKAE

AUBO

Dobot

All trademarks and logos belong to their respective owners and are used solely to link to their official websites. No affiliation, endorsement or partnership is implied.

ALARM GUIDE

Common Alarm Quick Reference: Match the Code, Then Report

Tell us the alarm code when you report a fault — it significantly speeds up diagnosis

Brand	Common alarm types	Possible causes	What you can do on site first
FANUC	SRVO servo alarms	Motor overheating/overload, encoder faults, damaged cables	Record the full alarm code and refer to the four-step troubleshooting method
ABB	Servo / drive fault alarms	Drive module faults, high motor temperature, lost feedback	Power down and restart to see if it recurs; record the alarm number
YASKAWA	Al. series alarms	Encoder faults, overload, power supply fluctuations	Check the emergency stop and safety circuits; record the alarm content
KAWASAKI	Servo / controller alarms	Servo system faults, excessive reducer load	Record the error code and the operating conditions when it occurred
KUKA	KRC control cabinet alarms	Drive faults, safety circuits, software licence issues	Capture the alarm message screen; do not clear the log yourself
INOVANCE / ESTUN	Servo drive alarms	Encoder faults, parameter errors, loose connections	Record the alarm code and check the cables visually

The above are directional checks only; the definitive answer comes from proper testing. Leave any work involving disassembly or measurement to professionals to avoid making the fault worse.

SERVICE MODES

Three Service Modes, Chosen to Fit Your Needs

From emergency repair to annual managed maintenance, covering every stage of your equipment's life

Emergency Repair (per incident)

For unexpected breakdowns: we inspect first, quote afterwards, and you pay only for a successful repair. Fast on-site response across the Pearl River Delta — suited to machines with no maintenance plan that fail only occasionally.

Inspect first, quote later

Preventive Maintenance (on schedule)

On a schedule matched to your machine's duty cycle: lubrication, fastening checks, battery replacement, precision spot-checks and alarm pre-inspection — catching problems before they cause downtime. Suited to machines in continuous production.

Fewer unplanned stoppages

Annual Overhaul & Managed Maintenance

Systematic refurbishment for older or heavily used machines — mechanical, electrical and precision restored item by item — with an optional annual managed contract that hands the whole maintenance responsibility to us.

Life extension for older machines

Not sure which to choose? Send us your equipment list and duty intensity and we'll suggest a configuration. See also Cycle-Based Maintenance Tips for Industrial Robots.

TYPICAL JOBS

Typical Situations We Handle

If any of the scenarios below match yours, get in touch directly

Alarm stopped the machine on night shift — production must resume by day

We read the alarm remotely to assess direction, restore operation as the priority once on site, then schedule a thorough repair — minimising production losses.

Older machine's precision isn't what it used to be

We run precision measurements and mechanical checks to distinguish wear, zero-point drift from parameter issues — calibrating where calibration is enough, overhauling where an overhaul is needed.

OEM repair quotes are high and lead times long

We offer third-party repair options: board-level diagnosis and repair alongside component replacement, with price and lead time laid out openly for comparison.

Nobody in the plant knows how to maintain the equipment

We build and execute a periodic maintenance plan from your equipment list, and train your equipment staff on daily checks — gradually building your own in-house capability.

What guarantees the quality of our repairs

In this trade, customers fear one thing above all: "it breaks again right after the repair." We build our warranty on a verifiable process:

✓Inspect first, quote later: we explain the fault location and the repair plan clearly, and start work only once you agree — no charge if we don't repair
✓Repairs are documented: what was replaced, what was adjusted, what was tested — a repair record accompanies delivery
✓Warranty with scope: if a repaired part fails within the warranty period through no misuse, we re-repair it as agreed
✓Parts with provenance: we state the source and grade of every replacement part — no passing off inferior parts as quality ones

FAQ

Maintenance & Repair FAQ

QHow long does a repair usually take?

Diagnosis of common alarm-type faults is usually completed the same day; repairs needing part replacement take days to a week or two depending on parts availability; major overhauls are scheduled per the plan. We give an estimated timeline and keep you updated on progress.

QCan you assess it remotely first?

Yes. Send us the alarm code, fault symptoms and a video; we'll give a directional assessment and handling advice, and if it can be solved remotely we won't keep you waiting for a site visit.

QIf we decide not to repair after inspection, is there a charge?

If you choose not to proceed after our quote, you pay only the agreed basic inspection fee (if any), and we still share the inspection conclusions so you can make other arrangements.

QCan you repair old models that have been out of production for years?

We've handled many older models, including board-level repair and alternative-part solutions for discontinued machines. Send us the model number for an assessment first — we take the job only when we're confident we can deliver.

Maintenance & Repair