The 6SL3210 series inverter from Siemens is widely used in industrial motor control applications. Like all drive systems, it may display fault codes during operation. Understanding these codes helps engineers quickly identify issues and reduce downtime.
This guide summarizes the most common fault codes and practical troubleshooting steps.
What is Siemens 6SL3210 Inverter?
The 6SL3210 series belongs to Siemens SINAMICS drive family and is designed for variable speed motor control. It is commonly used in:
Because these drives operate continuously in demanding environments, electrical or mechanical faults may occasionally occur.
Common Causes of Drive Faults
Before looking at specific fault codes, most inverter issues fall into these categories:
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Power supply instability
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Overcurrent or motor overload
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Overheating
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Wiring or grounding issues
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Encoder or feedback problems
Now let’s look at the detailed fault codes.
6SL3210 Fault Code List
1. Core Power Module Faults (F30000 Series)
| Fault Code |
Description |
Common Causes |
| F30001 |
Overcurrent |
Output short circuit, motor overload, power module fault |
| F30002 |
DC Link Overvoltage |
Excessively high supply voltage, brake unit fault, excessively fast deceleration |
| F30003 |
DC Link Undervoltage |
Phase loss in power supply, low input voltage, rectifier fault |
| F30004 |
Motor Overtemperature |
Motor overload, poor heat dissipation, temperature sensor fault |
| F30012 |
Power Unit: Heat Sink Temperature Sensor Open Circuit |
Disconnected temperature sensor, damaged sensor |
| F30017 |
Hardware Current Limitation Triggered Too Frequently |
Sudden heavy load changes, incorrect current limit parameter settings |
| F30071 |
Invalid Encoder Data |
Incorrect encoder wiring, signal interference, damaged encoder |
| F30630 |
Brake Control Fault |
Damaged brake resistor, brake unit fault, wiring errors |
2. Control Unit (CU) Faults (F01000 Series)
| Fault Code |
Description |
Common Causes |
| F01000 |
Control Unit Software Fault |
Firmware corruption, parameter errors, incomplete reset |
| F01001 |
Floating-Point Operation Error |
Software bug, unreasonable parameter settings |
| F01015 |
Control Unit Software Fault |
Internal program error, communication interruption |
| F01250 |
Control Unit Hardware Fault |
Damaged control unit, power supply abnormality |
| F01662 |
Control Unit Hardware Fault |
Internal circuit fault, damaged interface |
3. Communication Faults (F07900/F08500 Series)
| Fault Code |
Description |
Common Causes |
| F07901 |
PROFINET Communication Fault |
No controller telegram received, network interference, hardware abnormality |
| F07902 |
USS/MODBUS Communication Fault |
Communication timeout, parameter mismatch, wiring errors |
| F08501 |
PROFINET IO Communication Fault |
Incorrect device name, IP address conflict, network fault |
4. Encoder & Feedback Faults (F31100 Series)
| Fault Code |
Description |
Common Causes |
| F31118 |
Encoder Signal Loss |
Disconnected encoder connection, damaged cable, excessive interference |
| F31120 |
Encoder Fault |
Damaged encoder hardware, poor signal quality |
| F31121 |
Encoder No Response |
Encoder power supply fault, wiring errors |
5. Other Common Faults
| Fault Code |
Description |
Common Causes |
| F03505 |
Analog Input Open Circuit |
Disconnected analog signal cable, poor contact |
| F06310 |
Mains Voltage Parameter Setting Error |
Mismatch between P0210 setting and actual mains voltage |
| F07220 |
Communication Interruption |
External communication module fault, protocol mismatch |
| F07860 |
External Alarm |
External fault signal input, parameter setting error |
| F30656 |
Motor Module Parameter Error |
Incorrect motor parameter settings, module incompatibility |
| F30662 |
Internal Communication Error |
Communication interruption between control unit and power module |
|
How to Reset Faults on 6SL3210
After troubleshooting, faults can usually be cleared by:
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Turning off the drive power supply
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Waiting at least 60 seconds
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Restarting the inverter
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Resetting via control panel or digital input
If a fault reappears immediately, further hardware inspection is required.
When to Repair vs Replace
If the inverter shows repeated hardware-related faults such as F0010 or overheating issues even after maintenance, replacement of key components or the entire drive may be necessary to avoid production downtime.
Need Spare Parts or Technical Support?
If you need replacement units, repair support, or compatible spare parts for Siemens 6SL3210 drives, our engineering team can help identify the correct model and provide fast solutions for industrial applications.
