Sinamics V20 Fault Codes

Siemens has been building electrical equipment since 1847. During the existence of the company, it has produced many irreplaceable devices, including frequency converters. Unfortunately, no device can last forever so below, we'll learn SINAMICS V20 manual fault codes and how to fix them.

Overview of SINAMICS V20 Drives

SINAMICS V20 drives cover a wide power range, typically from 0.12 kW (0.16 HP) to 30 kW (40 HP). This makes them suitable for a wide range of engine sizes and applications. The V20 also supports multiple control modes, including V/f control (scalar control) and vector control.

V20 drives feature a compact design that makes them easy to install in various applications, including machines, pumps, fans, conveyors, and mixers. Some V20 drive models have a built-in brake chopper that provides energy recovery and controlled motor deceleration, reducing power consumption and mechanical wear.

In addition, V20 drives have built-in safety features such as Safe Torque Off (STO). These functions provide a safe shutdown of the drive and motor without powering off the drive, which improves operational safety.

The devices support various communication options, including Modbus RTU, USS (Universal Serial Interface), and optional Profibus and Profinet interfaces.

SINAMICS V20 Fault Codes

Here are some of the most common fault codes in SINAMICS V20 drives.

F1 Overcurrent
One of the main reasons for this fault can be the wrong choice of the converter by power, a short circuit to the ground or in the output cable, motor overload, or mechanical blocking of the shaft. To fix the error, you need to ensure that the motor power matches the power of the frequency converter in the absence of ground faults and cables, then ensure that there is no mechanical blockage. If the problem persists, you must increase the acceleration time and reduce the starting torque.

F2 Overvoltage
The main reason for this fault is too fast braking in electrodynamic mode and excess voltage in the network. To eliminate this fault, it is necessary to ensure that the rated mains voltage is within acceptable limits and to check the activation of the Vdc controller and its correct configuration.F3 Undervoltage
This fault indicates an unacceptably low voltage value. To fix it, you need to measure the voltage in the power supply network.

F4 Inverter overtemperature
There can be several reasons for this fault: failure of the built-in fan, invalid pulse frequency, device overload, and high ambient temperature. To get rid of the problem, you need to determine if your VFD meets the required power, check the temperature where the device is installed, and make sure the fan is working properly.

F5 Inverter I2t
This type of error indicates that the motor power is too high, the load cycle is high, and the frequency converter overloads. To troubleshoot, you need to check the electric motor's and frequency converter's technical characteristics and ensure that the load cycle does not exceed the limit values.

F6 Chip temperature rise exceeds critical levels
The main reasons you may see this message are insufficient acceleration time or excessive starting load. To fix the error, you need to check if the load matches the capabilities of your device and, if necessary, increase the acceleration time.

F11 Motor overtemperature
This error appears if you use 4 or 2 pole micromotors for voltages up to 250 V, at a low frequency of 15 Hz. To fix the problem check the motor temperature and if it is normal then you need to reset the P0335 characteristic to 1. In other cases, you must check the load cycle and overheating parameters.

F12 Inverter temperature signal lost
This message indicates an open circuit in the heatsink temperature sensor of your VFD. You must check the cable for damage and restore its integrity in such cases.

F41 Motor data identification failure
This fault occurs due to a data read error. In this case, you need to check whether the motor is connected to the inverter and ensure the motor data is entered correctly.

F60 Asic timeout
This message occurs when internal switching is incorrect or absent. Possible reasons are problems with electromagnetic compatibility and hardware or software lack of connection. You need to reset the error and if it persists, replace the converter.

Preventive Measures and Maintenance Tips

Here are some maintenance tips.

• Regular checkups. Perform visual inspections of the drive, motor, and associated equipment. Look for any signs of damage, loose connections, or abnormal operating conditions to quickly complete a SINAMICS V20 fault reset.
• Purity. Keep the disc and its surroundings clean and free from dust, dirt, and debris. Clean the cooling fans regularly and provide adequate ventilation for proper heat dissipation.
• Electrical connections. Check electrical connections for tightness and proper insulation. Loose or faulty links can lead to problems. Tighten any loose terminals and inspect cables for signs of wear or damage.
• Cooling system. Ensure the cooling system, such as fans or heatsinks, works properly. Clean or replace cooling components to maintain optimal cooling performance and prevent overheating.
• Environmental conditions. Maintain appropriate ecological conditions for the drive and motor. Keep equipment from excessive heat, moisture, vibration, and corrosive substances.
• Parameter settings. Review and verify the parameter settings in the drive configuration. Verify that the motor parameters, voltage levels, current limits, and other settings are entered correctly and match the motor specifications.
• Firmware updates. Stay current with the latest firmware updates and software releases by Siemens. These updates often include bug fixes, performance improvements, and improved error code handling.
• Load conditions. Avoid overloading the drive or sudden load changes. Make sure the drive is sized to match the motor and application requirements.

Best Practices for Preventing Fault Codes in SINAMICS V20 Drives

Preventing any SINAMICS V20 manual fault code is of decisive importance for trouble-free and reliable operation. Here are a few tips to help avoid error codes and ensure optimal performance.

• Correct installation. Make sure the drive is installed following Siemens instructions and recommendations.
• Adequate ventilation. Provide sufficient ventilation to the drive for effective heat dissipation.
• Regular maintenance. Follow the regular maintenance schedule for the drive.
• Parameter settings. Verify that the drive parameters are set correctly for the requirements of the motor and application.
• Overload protection. Provide adequate overload protection for the motor connected to the drive.
• Over-voltage protection. Install surge protectors to protect the drive from power surges and electrical noise.
• Monitoring and diagnostics. Use the integrated monitoring and diagnostic functions of the SINAMICS V20 drive.
• Training. Provide adequate training to personnel responsible for operating and maintaining the drive.
• Firmware updates. Stay up to date with the latest firmware and software releases provided by Siemens.

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