Lenze 333645 8104_E.4E.12 – 8100 Series 3.0 kW Frequency Inverter
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Product Information
The Lenze 333645, model 8104_E.4E.12, is a 3.0 kW frequency inverter from the Lenze 8100 Series, engineered for precise speed regulation of three-phase AC induction motors in cabinet-mounted industrial installations. Operating from a 3-phase mains supply spanning 320 V AC to 480 V AC, this AC drive delivers a rated mains input current of 8.8 A and a continuous output current of 7.3 A. Built in an IP20 enclosure, the inverter provides an output frequency range from 0 to 480 Hz and supports adjustable switching frequencies up to 16 kHz to reduce motor acoustic noise. It is commonly deployed for motor control in conveyor systems, packaging machinery, material handling equipment, industrial pumps, and ventilation fans.
For control integration, the drive features pluggable screw control terminals providing four programmable digital inputs, one flexible analog input accepting 0–10 V or 0/4–20 mA, and one configurable relay output. Network expansion is facilitated by a front slot that accepts plug-in fieldbus modules, including PROFIBUS-DP (2131 / 2133), LECOM-A/B serial interfaces (2102 / 2111), and INTERBUS (2112). Commissioning a spare unit requires transferring parameter sets, which can be performed using the pluggable Lenze Operating Module keypad (Bedienmodul) or Lenze Global Drive Control (GDC) PC software to restore backup files into non-volatile EEPROM memory. Technical assistance from ABC Industrial Parts can support parameter backup and configuration transfer during replacement.
System monitoring relies on front-panel LED status indicators, 4-digit 7-segment display readouts on the operating keypad, and fault history logging accessible via LECOM using Global Drive Control software. Routine troubleshooting should begin by verifying incoming AC line voltages across power terminals, testing motor cable insulation and windings, and checking fieldbus communication cabling and termination. If persistent internal hardware or memory corruptions occur that cannot be resolved through re-commissioning, replacing the drive or utilizing repair services through ABC Industrial Parts offers an efficient route back to production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 333645 |
| Model / Type | 8104_E.4E.12 |
| Product Family | 8100 Series |
| Component Type | Frequency Inverter |
| Rated Power | 3.0 kW |
| Nominal Supply Voltage | 400 V AC |
| Supply Voltage Range | 320 - 480 V AC |
| Rated Mains Current | 8.8 A |
| Continuous Output Current | 7.3 A |
| Output Frequency Range | 0 - 480 Hz |
| Switching Frequency | Up to 16 kHz |
| Enclosure Protection Rating | IP20 |
| Digital Inputs | 4 |
| Analog Inputs | 1 (0-10 V or 0/4-20 mA) |
| Digital / Relay Outputs | 1 |
Programming and Configuration
Parameterization and monitoring for the Lenze 333645 frequency inverter are managed using Lenze Global Drive Control (GDC) PC software or via the pluggable Lenze Operating Module keypad (Bedienmodul). Connected directly to the drive, the keypad allows manual adjustment of motor operating limits, acceleration/deceleration ramps, and digital/analog terminal assignments through its 4-digit 7-segment display interface.
Drive parameter sets are stored safely within non-volatile EEPROM memory, preventing parameter loss during power cycles. When commissioning a replacement inverter, identical operating parameters can be reloaded using GDC software over a serial LECOM interface connection or copied via the EEPROM memory functionality on the optional operating keypad to ensure matching setup.
Communication and System Integration
The Lenze 8104_E.4E.12 features pluggable screw control terminals for straightforward cabinet wiring. These terminals accommodate four programmable digital inputs for run commands and control flags, one analog input configurable for 0–10 V voltage or 0/4–20 mA current signals, and one relay output dedicated to drive fault signaling.
For higher-level network integration, the drive includes a front expansion slot designed to accept plug-in fieldbus communication modules. Supported options include PROFIBUS-DP adapters (types 2131 and 2133), LECOM-A/B serial communication modules (types 2102 and 2111), and INTERBUS modules (type 2112), enabling seamless fieldbus integration into industrial control systems.
Diagnostics and Status Indication
The Lenze 333645 inverter offers active operational feedback through dedicated front-panel LED indicators. These lights provide instant visual confirmation of power status and drive readiness, as well as indication of active fault or trip conditions.
Detailed numerical fault diagnostic codes are visible using the pluggable operating keypad's 4-digit display. Maintenance personnel can also query internal fault history registers via a serial LECOM interface module using Global Drive Control software for troubleshooting drive trip histories.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRIVE READY | Green - Solid | Inverter is powered and ready for operation |
| TRIP / FAULT | Red - Solid / Flashing | Drive fault or trip condition detected |
Replacement and Spare Part Considerations
When replacing an existing Lenze 333645 (type 8104_E.4E.12) inverter, ensure that the power rating (3.0 kW) and supply voltage requirements (320–480 V AC) match the installed equipment. Proper matching guarantees compatibility with existing motor cables, fusing, and cabinet mounting space.
The replacement process requires transferring the original drive's parameter configuration. Parameters stored in the non-volatile EEPROM memory must be backed up using Global Drive Control software or copied using the pluggable operating module keypad before swapping units to maintain exact control functionality.
Care should also be taken to swap any installed fieldbus option cards—such as PROFIBUS-DP or LECOM modules—from the original drive to the new spare unit. Ensure terminal blocks and communication addresses match prior to restoring full system power.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| E1 | Earth fault | Ground fault on motor output side | Short circuit to earth in motor cable or motor winding. | Check motor wiring and motor winding insulation. Inspect drive power stage. |
| E2 | Overvoltage DC bus | DC bus voltage exceeded overvoltage limit threshold during deceleration | Excessive regenerative energy during braking, ramp time too short. | Extend deceleration time, fit or check brake module/resistor. |
| E3 | Undervoltage DC bus | DC bus voltage fell below minimum allowable operating threshold | Mains supply failure, supply voltage drop, line phase loss. | Check supply voltage lines, fuses, and power connections. |
| E4 | Overcurrent | Excessive output current detected by inverter current sensors | Short circuit at output, motor overload, acceleration time too short, incorrect motor parameter settings. | Check output wiring and motor for short circuits, increase acceleration time, check motor data. |
| E5 | Heatsink overtemperature / Motor thermal overload | Drive heat sink temperature limit exceeded or motor PTC sensor triggered | Insufficient cooling, fan failure, ambient temperature too high, motor overloaded. | Clean heatsink fins, check cabinet ventilation and cooling fans, reduce load. |
| EE | EEPROM error | Internal parameter memory checksum or read/write error | Internal memory corruption or hardware component failure. | Reload factory default settings and re-commission. If fault persists, internal hardware fault — return unit for repair. |
| LU | Undervoltage lockout | Mains voltage too low for active inverter operation | Mains input power disconnected or brownout condition. | Verify incoming AC line power. |
| CE | Communication error | Time-out or error on LECOM / Fieldbus interface module | Interrupted serial communications cable, wrong baud rate, or bus master failure. | Check communication cabling, bus termination resistors, and master settings. |
Frequently Asked Questions
Which software is used to configure the Lenze 333645 inverter?
The Lenze 333645 frequency inverter can be configured using Lenze Global Drive Control (GDC) PC software over a LECOM connection, or directly configured via the optional Lenze Operating Module keypad (Bedienmodul).
What communication options are supported by model 8104_E.4E.12?
The inverter features a front expansion slot that accepts plug-in fieldbus modules for PROFIBUS-DP (modules 2131 / 2133), LECOM-A/B serial interfaces (modules 2102 / 2111), and INTERBUS (module 2112).
How are parameters transferred to a replacement unit?
Parameters can be transferred by backing up the parameter file in Global Drive Control (GDC) software and reloading it into the replacement unit, or by using the EEPROM parameter copy function on the optional operating module keypad.
What does fault code EE mean on the Lenze 8100 drive?
Fault code EE indicates an internal EEPROM checksum or memory read/write error. It recommended to reload factory default settings and re-commission the drive; if the fault persists, it indicates an internal hardware failure.
What electrical input voltage is required for the 333645 drive?
The drive requires a 3-phase AC mains supply operating within a voltage range of 320 to 480 V AC, drawing a nominal mains current of 8.8 A.
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