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villanuevadavidAug 23, 2025
What does 'LU' mean on my Lenze Inverter and how to fix it?
- JJennifer CookAug 23, 2025
The 'LU' error on your Lenze Inverter indicates that the DC-bus voltage is too low. Check the mains voltage or supply module.
To Next PageTo Next PageWhat does 'LU' mean on my Lenze Inverter and how to fix it?
The 'LU' error on your Lenze Inverter indicates that the DC-bus voltage is too low. Check the mains voltage or supply module.
General| Category | Inverter |
|---|---|
| Output voltage range | 0 V to input voltage |
| Control modes | vector control |
| Communication interfaces | RS485, CANopen, Profibus, Ethernet |
| Protection features | Overcurrent, overvoltage, undervoltage, short circuit, overtemperature |
| Relative humidity | 95 % (non-condensing) |
| Protection class | IP20 |
Explains the purpose and usage of the operating instructions.
Lists the items included in the delivery.
Details applicable legal and EC directives for the controllers.
Provides essential safety and application notes for controllers.
Explains the structure and meaning of safety icons and signal words.
Lists remaining hazards and precautions for operator safety.
Details vibration resistance, humidity, temperature, and installation height.
Lists electrical and performance data for various types under overload.
Specifies fuse types and cable cross-sections for single drives.
Details controller dimensions based on mechanical installation.
Key considerations for controller installation and environment.
Crucial notes for electrical installation and mains types.
User responsibility for EC directives and EMC compliance.
Checks required before the initial switch-on of the controller.
Step-by-step procedure for initial switch-on and basic operation.
How to select the minimum and maximum field frequencies.
Choosing between V/f control modes with or without boost.
Explains the purpose and methods of controller configuration.
How to read and interpret the parameter code table.
Covers general troubleshooting steps and displays.
Explains how to use the history buffer for fault tracing.
Details fault displays, causes, and remedies.
Procedures for resetting fault indications and TRIP status.
Lists available accessories applicable to all controller types.
Lists software and order numbers for controller management.
Details accessories specific to different controller types.
