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Industrial Robot Fault Codes Library
Complete Guide to ABB, FANUC, KUKA & Yaskawa Error Codes
When an industrial robot stops due to a fault code, every second counts. Production delays, troubleshooting uncertainty, and unexpected repair costs can quickly escalate.
This Industrial Robot Fault Codes Library is designed to help engineers, technicians, and maintenance teams quickly identify, understand, and resolve robot errors across major brands like ABB, FANUC, KUKA, and Yaskawa.
What Are Industrial Robot Fault Codes?
Industrial robot fault codes are diagnostic messages generated by the controller when the system detects abnormal behavior.
These errors typically relate to:
- Motion control systems (servo motors & drives)
- Feedback devices (encoders & resolvers)
- Operator interfaces (teach pendants & HMIs)
- Communication systems and internal buses
Each manufacturer uses a different fault structure:
- ABB → Numeric error codes (e.g., 40205)
- FANUC → Alarm-based system (SRVO, SP, SYS)
- KUKA → KSS-based diagnostic messages
- Yaskawa → Alarm codes linked to servo and controller states
Understanding these codes is the first step toward fast and accurate troubleshooting.
Browse Fault Codes by Brand
ABB Robot Error Codes
Common ABB faults, causes, and repair solutions.
FANUC Alarm Codes
SRVO, SP, and SYS alarms with quick diagnostics.
Explore FANUC Errors →Select your robot brand below to explore detailed fault code explanations, root causes, and repair solutions.
Fault Codes by System Category
To speed up troubleshooting, fault codes can be grouped by subsystem.
Servo & Drive Errors
Symptoms:
- Robot cannot move
- Axis locking or vibration
Common causes:
- Servo drive failure
- Motor overload
- Parameter mismatch
👉 Recommended check:
- Inspect servo drive status
- Verify motor condition
Encoder & Feedback Errors
Symptoms:
- Position loss
- Calibration errors
- Sudden stops
Root causes:
- Encoder failure
- Signal interruption
- Cable wear or damage
👉 Action:
- Replace encoder
- Check feedback cable
Teach Pendant & HMI Errors
Symptoms:
- Black screen
- Touch not responding
- No display
Typical causes:
- LCD damage
- Internal cable failure
- Mainboard issues
👉 Related guides:
- Teach Pendant Black Screen
- Touch Screen Not Working
Communication Errors
Symptoms:
- Controller disconnect
- Fieldbus errors
Possible causes:
- Ethernet/IP failure
- Internal communication fault
- Loose connectors
Power & System Errors
Symptoms:
- Robot not starting
- Unexpected shutdown
Root causes:
- Power supply failure
- Internal hardware fault
- Overheating
Step-by-Step Troubleshooting Workflow
Follow this structured approach when a fault occurs:
Step 1: Identify the Fault Code
Check the robot controller or HMI display.
Step 2: Classify the Error
Determine whether it is:
- Electrical
- Mechanical
- Communication
Step 3: Inspect Critical Components
Focus on:
- Cables
- Encoders
- Servo drives
Step 4: Perform Basic Reset
- Restart the controller
- Clear alarm history
Step 5: Replace Faulty Components
If the issue persists, component replacement is usually required.
High-Failure Robot Components (Key Spare Parts)
Based on real-world maintenance data, the following components fail most frequently:
- Teach pendants (screens, keypads)
- Encoders and feedback devices
- Servo drives and motors
- Robot cables (especially high-flex cables)
👉 Recommended spare parts collections:
Why Fault Codes Matter in Industrial Maintenance
Ignoring robot fault codes can lead to:
- Extended downtime
- Increased repair costs
- Secondary system failures
A structured fault code library helps:
- Reduce MTTR (Mean Time to Repair)
- Improve troubleshooting efficiency
- Support predictive maintenance strategies
Build Your Own Fault Code Knowledge Base
For factories and system integrators:
- Track frequently occurring fault codes
- Maintain a log of repair actions
- Stock high-risk spare parts in advance
This transforms maintenance from reactive to proactive.
Related Resources
Explore more technical guides:
- Industrial Robot Spare Parts Guide
- Servo Drive & Motor Guide
- Teach Pendant Troubleshooting Center
- Robot Cable Failure Guide
Conclusion
The Industrial Robot Fault Codes Library is more than a reference—it’s a practical tool for reducing downtime and improving operational efficiency.
By combining structured fault code navigation, system-based diagnostics, and targeted repair solutions, you can resolve issues faster and keep your production running smoothly.
🔧 Recommended Parts for
Key components commonly involved in issues and replacements.
📘 Related Resources for
- Yaskawa Teach Pendant Not Working: Causes, Troubleshooting & Repair Guide
- Industrial Robot Symptoms & Failure Diagnostics Center
- ABB Robot System Communication Timeout? Cable & Signal Integrity Diagnostic Guide
- Mobile Robots & Quadruped Robots: Ultimate Guide to Robot Dogs, Inspection Robots and Industrial Applications
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