Lenze 8102_E.4G.12 8102 E Frequency Inverter – 8100 Series
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Product Information
The Lenze 8102_E.4G.12 is a 0.75 kW frequency inverter from the Lenze 8100 series, engineered to provide precise variable speed control for standard 3-phase AC induction motors. Designated under model type 8102 E, this compact drive operates across a 3-phase supply voltage range of 320 V AC to 528 V AC (400 V nominal) and delivers a continuous output current of 2.5 A. With an adjustable output frequency from 0 Hz to 480 Hz, it is suited for conveyor systems, material handling drive axes, centrifugal pumps, and industrial fan regulation. Physical connectivity is handled via integrated screw control terminals for digital, analog, and relay contact interfaces, alongside a front option slot for add-on modules.
Integrating a replacement drive into an existing automation line requires matching terminal layouts, verifying fieldbus interfaces, and configuring drive parameters. The Lenze 8102_E.4G.12 supports modular communication via optional LECOM RS-232/RS-485 or CAN system bus modules inserted into the front slot. Commissioning a spare unit is not a simple plug-and-run procedure; parameter sets must be transferred to the replacement unit using either a plug-in keypad module or Lenze Global Drive Control (GDC) PC software. When parameter extraction from a faulty donor unit is challenging, technical assistance from ABC Industrial Parts can support configuration recovery and spare unit preparation.
Real-time monitoring and fault identification are facilitated through the optional plug-in operating keypad display, parameter C003 in GDC software, or the physical status relay output. The inverter actively monitors operating conditions and triggers distinct fault codes for overcurrent events, DC bus overvoltage or undervoltage, phase loss, and motor or heatsink thermal limits. While field-level checks can resolve external line voltage or wiring errors, internal hardware issues such as memory errors or output stage breakdown cannot be repaired on-site. In these cases, procuring a tested exchange unit or utilizing repair services from ABC Industrial Parts offers a dependable path back to full production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 8102_E.4G.12 |
| Model / Type | 8102 E |
| Product Family | Lenze 8100 |
| Component Type | Frequency Inverter |
| Rated Power | 0.75 kW |
| Nominal Supply Voltage | 400 V AC (3-Phase) |
| Supply Voltage Range | 320–528 V AC |
| Continuous Output Current | 2.5 A |
| Output Frequency Range | 0–480 Hz |
| Control Connection | Integrated Screw Terminals |
| Module Slot | Front Slot for Keypad / LECOM / CANopen Modules |
Programming and Configuration
Drive configuration for the Lenze 8102_E.4G.12 is performed using Lenze Global Drive Control (GDC) PC software or directly via a plug-in operating module keypad. Parameterization includes setting acceleration and deceleration times, motor thermal protection limits, and terminal mapping for analog and digital I/O.
For rapid maintenance turnover, parameter sets can be cloned directly between drives using the plug-in keypad module or exported and reloaded using GDC software. In the event of EEPROM parameter corruption (fault code EE), executing a factory reset restores default parameters, allowing full re-commissioning of the unit.
Communication and System Integration
The Lenze 8102_E.4G.12 integrates into distributed control networks through dedicated communication interface modules fitted into its front panel slot.
Available module options include Lenze LECOM modules supporting RS-232 or RS-485 serial communications and Lenze CAN system bus modules. Correct protocol setup, address selection, and matching baud rates are required to maintain continuous data exchange and prevent communication timeout faults.
Diagnostics and Status Indication
Diagnostic indications on the Lenze 8102_E.4G.12 are provided locally via the plug-in operating module keypad display, through parameter C003 in GDC software, and via the hardwired status relay contact output.
The inverter continuously performs self-diagnostic routines to protect against overcurrent, internal ground faults, DC bus voltage fluctuations, phase loss, and overtemperature conditions, giving maintenance teams precise fault indications during operational interruptions.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Ready / Fault | Green / Red - Solid / Flashing | Operating status and fault indicators on optional plug-in operating panel |
Replacement and Spare Part Considerations
Before installing a spare Lenze 8102_E.4G.12 inverter, ensure that the power rating (0.75 kW, 2.5 A) and voltage supply match the existing installation. Because drive behavior relies on application-specific parameter settings, running a spare drive requires copying the parameter set from the original unit prior to startup.
Parameter transfer can be accomplished via the plug-in keypad module or GDC software. If complete line modernizations are planned, Lenze 8400 or i500 series inverters serve as modern replacement alternatives for long-term upgrades.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Overcurrent during acceleration | Output current exceeded overcurrent threshold during acceleration ramp | Acceleration time too short, motor overload, short circuit in motor cable, incorrect motor parameters | Increase acceleration time, check motor wiring for short circuits, verify motor parameter configuration |
| OC2 | Overcurrent during deceleration | Output current exceeded overcurrent threshold during deceleration ramp | Deceleration time too short, generatoric overload, braking chopper fault | Increase deceleration time, install or check external braking resistor, check motor insulation |
| OC3 | Overcurrent at constant speed | Output current exceeded overcurrent threshold during steady-state operation | Sudden load change, motor stalled, short circuit or ground fault | Check mechanical load for jam, inspect motor cables and terminal connections |
| OC5 | Earth fault / Short circuit | Ground fault or phase-to-phase short circuit detected at inverter output | Motor cable insulation breakdown, ground fault in motor windings, defective output power stage | Disconnect motor cables and measure insulation resistance. If fault persists with cables disconnected, internal hardware fault — return unit for repair. |
| OU | Overvoltage DC bus | DC bus voltage exceeded maximum allowable threshold | Mains supply voltage too high, regenerative energy during braking too high without active braking module | Check supply voltage, extend deceleration time, connect external brake resistor |
| LU | Undervoltage DC bus | DC bus voltage dropped below minimum operating limit | Mains supply voltage too low, supply phase loss, power supply interruption | Check mains voltage and supply line fuses |
| OH | Heatsink overtemperature | Inverter heatsink temperature exceeded maximum operating threshold | Inadequate cooling / ventilation, ambient temperature too high, fan failure, dirty heatsink | Clean cooling fins, verify cabinet ventilation and fan operation, allow drive to cool down |
| OH4 | Motor overtemperature | Motor temperature sensor (PTC/TK) detected thermal overload | Motor continuous overload, insufficient motor cooling, defective sensor wire | Reduce motor load, inspect motor cooling fan and thermal contact wiring |
| LP1 | Mains phase failure | Phase loss detected on incoming AC mains supply | Blown input fuse, loose connection on line terminal, line voltage unbalance | Check incoming power mains lines, fuses, and terminal block connections |
| EE | EEPROM memory error | Checksum fault or corruption in internal EEPROM parameter storage | Electromagnetic interference during write process, corrupted memory hardware | Perform factory parameter reset (load default settings) and re-commission drive. Internal hardware fault if error cannot be reset — return unit for repair. |
| EEr | EEPROM read error | Error occurred while reading parameter data from non-volatile storage | Hardware memory cell failure, internal control board failure | Cycle input power. Internal hardware fault — return unit for repair if persistent. |
| CE0 | Communication error / LECOM interruption | Communication failure over LECOM interface or plug-in module | Cable fault, protocol timeout, disconnected communication interface module | Check communication cable, verify baud rate and address settings, check module connection |
| P13 | Transducer fault / Internal error | Internal current or voltage measurement sensor error | Internal measurement circuit fault, corrupted factory calibration | Internal hardware fault — return unit for repair. |
Frequently Asked Questions
What engineering software is used to configure the Lenze 8102_E.4G.12 inverter?
The Lenze 8102_E.4G.12 is configured using Lenze Global Drive Control (GDC) PC software or locally via a plug-in keypad module.
How do I transfer parameters to a replacement Lenze 8102_E.4G.12 drive?
Parameter sets can be copied directly using a plug-in keypad module or uploaded and downloaded using Lenze Global Drive Control (GDC) software.
What does an OC5 fault code indicate on this inverter?
An OC5 fault code indicates an earth fault or phase-to-phase short circuit at the inverter output, which can be caused by motor cable failure, motor winding ground faults, or damaged internal output electronics.
What communication interfaces are supported by the Lenze 8102_E.4G.12?
The drive features a front module slot that accepts optional LECOM (RS-232/RS-485) communication modules or Lenze CAN system bus modules.
What modern drive options exist for upgrading from this legacy Lenze drive?
Lenze recommends upgrading to the 8400 or i500 inverter series when modernizing installations equipped with legacy 8100 series drives.
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Data backup and recovery
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Specific firmware and hardware versions
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Disclaimer:
We are not an authorised distributor of Lenze.
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