Lenze 33.8104E 8104E 1HP 230V AC Frequency Inverter
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Product Information
The Lenze 33.8104E (model 8104E) is a compact frequency inverter from the Lenze 8100 Series engineered for precise variable speed control of standard three-phase AC induction motors. Operating on a 230V AC supply with an input voltage range of 180V to 264V AC, this 1 HP (0.75 kW) drive delivers a rated output current of 4A. Utilizing proven V/f characteristic control across an output frequency spectrum from 0 Hz to 240 Hz, it provides stable speed regulation for conveyor belts, ventilation fans, centrifugal pumps, and automated packaging lines. Power mains, motor outputs, and control signals are connected directly via built-in screw terminals.
Commissioning a replacement 33.8104E drive requires transferring the application parameter set to ensure compatibility with existing motor characteristics and machinery speed profiles. Parameter sets are held inside internal non-volatile EEPROM memory, providing permanent retention without relying on battery backup during extended shutdowns. Setup and configuration transfers can be performed using a pluggable keypad module, terminal control signals, or a PC running Lenze Global Drive Control (GDC) software via an optional LECOM RS-232 or RS-485 serial communication adapter. When replacing a damaged unit, parameter extraction from a donor unit or saved file ensures smooth configuration transfer, supported by technical services at ABC Industrial Parts.
Drive operation and diagnostic feedback are monitored through integrated front panel LED indicators, keypad fault displays, and LECOM serial diagnostic register readouts. A solid green READY / POWER LED confirms supply power is active and the inverter is prepared for operation, while a red TRIP / FAULT LED indicates an active trip condition. First-line troubleshooting for fault trips such as undervoltage (LU), overvoltage (OU), overcurrent (OC), overtemperature (OH), or thermal overload (It) involves checking incoming mains supply, load cables, heatsink airflow, and deceleration ramps. An EEPROM failure (EE) or a red fault LED that persists across power cycles points to an internal board failure that cannot be serviced in the field, making unit repair or a tested replacement drive from ABC Industrial Parts the fastest route to restoring operation.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 33.8104E |
| Model / Type | 8104E |
| Product Family | 8100 Series |
| Component Type | Frequency Inverter |
| Rated Power (kW) | 0.75 kW |
| Rated Power (HP) | 1 HP |
| Supply Voltage | 230 V AC |
| Supply Voltage Range | 180 - 264 V AC |
| Output Voltage | 230 V AC |
| Output Current | 4 A |
| Output Frequency Range | 0 - 240 Hz |
| Control Method | V/f Characteristic Control |
| Parameter Memory | Non-volatile EEPROM |
| Wiring Connection | Integrated Screw Terminals |
Programming and Configuration
Parameterization of the Lenze 33.8104E drive can be accomplished through terminal control inputs, a pluggable operating keypad module, or via software. Machine parameters, including frequency ranges, acceleration ramps, and current limits, are saved directly to internal non-volatile EEPROM memory. This non-volatile architecture protects drive settings during power loss without requiring battery maintenance.
For automated backup and precise adjustments, the inverter communicates with Lenze Global Drive Control (GDC) PC software through an optional LECOM serial adapter supporting RS-232 or RS-485 interfaces. Utilizing GDC software allows maintenance engineers to store complete parameter sets on a local PC, simplify drive parameter cloning during replacement, and verify operational thresholds across multiple machine modules.
Communication and System Integration
The 33.8104E frequency inverter interfaces with control cabinets via integrated screw terminal blocks for incoming mains power, three-phase motor wiring, and control signals. The unit delivers flexible motor regulation across an output frequency spectrum from 0 Hz to 240 Hz using V/f characteristic control.
Serial connectivity is provided through optional LECOM communication adapter modules operating over RS-232 or RS-485 protocols. When equipped with a LECOM module, the drive supports serial diagnostic register readouts and remote parameter management through Lenze Global Drive Control (GDC) PC software.
Diagnostics and Status Indication
Diagnostic monitoring on the Lenze 33.8104E inverter is provided through front-panel LED indicators, an optional pluggable keypad fault display, and LECOM serial diagnostic register access via Lenze Global Drive Control (GDC) software.
Integrated status LEDs give immediate visual feedback on drive power readiness and active fault conditions, allowing maintenance personnel to distinguish between minor trip states and internal hardware faults.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| READY / POWER | Green - Solid | Green LED indicates drive is powered and ready for operation. |
| TRIP / FAULT | Red - Solid / Persistent | Red LED indicates a drive fault/trip state. Persistent indication after power cycle indicates internal hardware failure requiring repair. |
Replacement and Spare Part Considerations
The Lenze 33.8104E (model 8104E) serves as a direct drop-in replacement for existing Lenze 8100 Series installations. When planning a replacement, verify that the 1 HP (0.75 kW) rating, 230V AC input requirement, and 4A rated output current match the original unit specifications.
A replacement drive must be loaded with the existing machine parameters prior to running production. Parameter sets saved in EEPROM memory can be copied using a pluggable keypad module or uploaded to Lenze Global Drive Control (GDC) software using a LECOM RS-232 or RS-485 adapter module for transfer into the replacement inverter.
For plant modernization or long-term machinery support where legacy 8100 series components are being phased out, modern successor series such as the Lenze i510 and i550 cabinet frequency inverters offer alternative options for panel retrofits.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| LU | Undervoltage | DC bus voltage fell below minimum allowable operating threshold. | Mains supply line voltage too low or mains supply drop. | Check supply mains voltage and input fusing. |
| OU | Overvoltage | DC bus voltage exceeded maximum safety limit. | Regenerative energy from motor during fast deceleration or excessive mains line surge. | Increase deceleration time or install braking resistor / module. |
| OC | Overcurrent | Output current exceeded peak tripping threshold. | Short circuit on output cables, ground fault, or excessively short acceleration time. | Check motor and wiring for short circuits/ground faults; increase acceleration time. |
| OH | Overtemperature | Heatsink temperature exceeded safety limit. | Insufficient cooling airflow, high ambient temperature, or fan failure. | Clean heatsink, improve cabinet ventilation, check ambient conditions. |
| It | Ixt Overload | Continuous motor or drive thermal load limit reached. | Motor operated under high mechanical load for prolonged period. | Reduce motor load, verify duty cycle and motor dimensioning. |
| EE | EEPROM Fault | Internal non-volatile memory read/write or checksum error. | Internal EEPROM failure or corrupted memory parameters. | Internal hardware fault — attempt factory reset; if persistent, return unit for repair or replace unit. |
Frequently Asked Questions
Which software is used to program and configure the Lenze 33.8104E drive?
The Lenze 33.8104E can be configured using Lenze Global Drive Control (GDC) PC software via an optional LECOM RS-232 or RS-485 communication adapter module, or adjusted locally using a pluggable keypad module.
Does the Lenze 33.8104E require a battery backup to maintain parameter memory?
No, parameters are stored in non-volatile internal EEPROM memory, securing all settings during power shutdowns without needing a battery.
What does a persistent red TRIP / FAULT LED indicate on the drive?
A red TRIP / FAULT LED that remains lit after a power cycle indicates an internal hardware failure that cannot be cleared through a standard reset, requiring board repair or drive replacement.
How do you clear an LU fault code on the 33.8104E inverter?
An LU code indicates a DC bus undervoltage. Inspect incoming mains voltage, line drops, and input fusing to restore correct operating voltage.
What steps should be taken when an EE fault code occurs?
An EE fault indicates a memory read/write or checksum error in the internal EEPROM. Attempt a factory reset; if the code persists, the internal memory hardware is faulty and the inverter must be repaired or replaced.
What is the recommended modern Lenze drive series to replace legacy 8100 series units?
The Lenze i510 and i550 cabinet frequency inverter series represent modern successor options for retrofitting legacy 8100 series drive systems.
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Data backup and recovery
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Disclaimer:
We are not an authorised distributor of Lenze.
Product photos are for illustration purposes only and may differ from the actual product delivered.
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