Lenze 8102_E.3C.11 8100 Series 1.5kW Frequency Inverter
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Product Information
The Lenze 8102_E.3C.11 is a 1.5 kW frequency inverter designed for precise speed control of standard 3-phase asynchronous AC motors. As part of the Lenze 8100 Series, this drive operates on a 3-phase AC input supply ranging from 323 V AC to 528 V AC (380 V to 480 V AC nominal) and converts incoming mains power into a variable frequency output from 0 Hz to 480 Hz. Designed for space-saving control cabinet installation with an IP20 enclosure rating, the drive uses V/f characteristic control and a high 16 kHz switching frequency to deliver smooth motor performance with minimal operational noise across conveyor systems, fans, pumps, and processing equipment.
Control connections are made directly via onboard screw terminals, providing four digital inputs for control signals, two analog setpoint inputs supporting 0–10 V or 0/4–20 mA signals, and one 0–10 V analog output. Communication flexibility is extended through an integrated slot that accepts plug-in modules, including LECOM-A (RS232), LECOM-B (RS485), and LECOM-LI (CAN bus). Commissioning a replacement unit requires transferring the drive's parameter configuration. Parameters can be copied using the optional Lenze 8101 operating keypad or PC-based Global Drive Control (GDC) software, utilizing the drive's non-volatile internal EEPROM. ABC Industrial Parts can assist in preparing replacement drives with configuration pre-loading to minimize machine downtime.
Comprehensive diagnostic tools are built directly into the inverter. Front-panel status LEDs provide immediate feedback on operational readiness and TRIP fault conditions, while a hardware TRIP relay output signals fault states to supervisory PLCs. Specific fault codes and operational metrics can be read out using parameter codes C013 and C016 via the keypad or software interface. When experiencing repeated overvoltage, overcurrent, or internal EEPROM hardware errors, verification of supply lines, motor cabling, and internal memory stability is recommended. Internal hardware or component failures are not field-serviceable; replacing the unit or utilising tested exchange services through ABC Industrial Parts ensures a rapid return to production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 8102_E.3C.11 |
| Product Family | 8100 Series |
| Component Type | Frequency Inverter |
| Rated Power Output | 1.5 kW |
| Supply Voltage Range | 323 - 528 V AC (3-phase 380V - 480V AC nominal) |
| Mains Input Current | 4.8 A |
| Continuous Output Current | 3.9 A |
| Maximum Output Voltage | 480 V AC |
| Output Frequency Range | 0 - 480 Hz |
| Switching Frequency | 16 kHz |
| Control Method | V/f Characteristic Control |
| Digital Inputs | 4 |
| Analog Inputs | 2 (0–10 V or 0/4–20 mA) |
| Analog Outputs | 1 (0–10 V) |
| Enclosure Protection Rating | IP20 |
Programming and Configuration
Parameterization of the Lenze 8102_E.3C.11 frequency inverter is accomplished through either the plug-in Lenze 8101 operating keypad or PC-based software using Global Drive Control (GDC). Commissioning involves setting motor nameplate parameters, ramping times, analog setpoint scaling, and input functionality. Key parameters such as C013 and C016 provide access to stored fault history and internal status logs.
The drive incorporates internal non-volatile EEPROM memory to safely retain parameter settings when unpowered. Using the Lenze 8101 keypad, technicians can perform direct parameter copying from one inverter to another, facilitating quick configuration without requiring a dedicated PC. When programming via software, parameter files can be extracted, modified, and restored directly to donor or replacement drives.
Communication and System Integration
The 8102_E.3C.11 features an integrated communication slot designed to accept modular fieldbus adapters. Available plug-in communication modules include LECOM-A for RS232 serial interfaces, LECOM-B for RS485 network connections, and LECOM-LI for CAN bus system integration. These modules allow remote control, parameter editing, and state monitoring from higher-level PLCs or control software.
Hardwired terminal integration uses dedicated screw terminals for field signals. The drive provides four digital inputs for essential functions such as drive enable, start/stop, and fault reset, along with two analog inputs for frequency reference setpoints. One analog output is provided for motor speed or frequency monitoring, and a dedicated TRIP relay contact allows integration into machine safety loops.
Diagnostics and Status Indication
The Lenze 8102_E.3C.11 incorporates front panel status LEDs and parameter readouts for live diagnostic checks. The green Ready / Power LED lights solid when the drive is powered and ready, and flashes during active motor operation or warning conditions. A solid red Fault / TRIP LED indicates an active fault state that shuts down inverter output.
Detailed diagnostic monitoring is available through parameter codes C013 and C016, which display specific active and historical fault codes on the keypad or within Global Drive Control software. External hardware integration is supported by the dedicated TRIP terminal relay output, which triggers an external alarm or opens safety interlocks upon drive failure.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Ready / Power | Green - Solid or Flashing | Solid green indicates ready for operation; flashing green indicates run state or warning condition. |
| Fault / TRIP | Red - Solid | Solid red indicates a TRIP fault present due to internal hardware faults, overvoltage, or overcurrent. |
Replacement and Spare Part Considerations
When replacing an existing Lenze 8102_E.3C.11 inverter, verify that the incoming supply voltage and motor power ratings match the original installation. The replacement unit must have its parameters copied from the original drive or configured using saved parameter files via Global Drive Control (GDC) or an 8101 keypad.
Ensure any plug-in LECOM communication modules (LECOM-A, LECOM-B, or LECOM-LI) fitted to the existing drive are transferred to the replacement unit. Fieldbus addresses, baud rates, and terminal jumpers on the module must remain identical to maintain communication with the control network.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OH | Heatsink Overtemperature | Heatsink temperature exceeds maximum allowable threshold. | Insufficient cooling, ambient temperature too high, clogged heat sink fins, fan failure. | Check cabinet ventilation, clean heatsink, reduce ambient temperature, reduce motor load. |
| OH4 | Motor Temperature Trip | Motor thermistor or thermal switch activated on terminal T1/T2. | Motor overload, insufficient motor cooling at low speeds. | Allow motor to cool down, check motor thermal protection switch, reduce motor load. |
| OC1 | Short Circuit / Earth Fault | Short circuit or earth fault on motor output terminals U, V, W. | Short circuit in motor winding, motor cable damaged, ground fault in wiring. | Check motor and motor cable insulation, test motor windings for phase-to-phase or phase-to-ground short circuit. |
| OC2 | Overcurrent during Acceleration | Output current limit exceeded during speed acceleration ramp. | Acceleration time (t_acc) set too short, excessive motor load torque, wrong motor data parameters. | Increase acceleration time, verify motor parameters, check mechanical system for jamming. |
| OC3 | Overcurrent at Constant Speed | Excessive output current detected during steady state operation. | Sudden load surge, mechanical obstruction, motor undersized for application. | Inspect mechanical load, check process torque demands, verify motor and drive sizing. |
| OC4 | Overcurrent during Deceleration | Output current limit exceeded during speed deceleration ramp. | Deceleration time (t_dec) set too short, high load inertia. | Increase deceleration time, install brake chopper/resistor if supported. |
| OU | DC Bus Overvoltage | DC bus voltage exceeds maximum threshold limit. | Regenerative energy from motor during deceleration, deceleration ramp too fast, high mains supply voltage. | Extend deceleration time, check mains voltage, install braking module/resistor. |
| LU | DC Bus Undervoltage | DC bus voltage dropped below minimum threshold limit. | Mains supply failure, line phase loss, input supply voltage drop under load. | Check mains voltage input fuses, wiring, and incoming supply lines. |
| rEE | EEPROM Fault | Internal parameter memory read/write failure or memory corruption. | Internal hardware fault, power loss during parameter save, EEPROM chip failure. | Reload factory defaults and reconfigure. Internal hardware fault — return unit for repair if error persists. |
| EEr | External Fault | External TRIP signal triggered via control input terminal. | External safety circuit, pressure switch, or external relay trip triggered. | Check external fault condition on external sensors/switches tied to control input. |
| CE0 | Communication Fault | Time-out or error detected on communication interface. | Loose communication cable, wrong baud rate, missing bus termination, LECOM/fieldbus module unplugged. | Check communication interface module, wiring, baud rate settings, and master controller status. |
| P12 | Mains Phase Failure | Failure detected in one or more incoming AC mains supply phases. | Blown input fuse, loose supply connection, asymmetrical grid supply voltage. | Check line supply fuses, supply voltages across all 3 input phases. |
Frequently Asked Questions
How do I transfer parameters from an old drive to a replacement Lenze 8102_E.3C.11?
Parameters can be backed up and restored using the plug-in Lenze 8101 keypad via its internal EEPROM transfer function, or through a PC connected with Global Drive Control (GDC) software.
What communication modules are compatible with the 8102_E.3C.11?
The drive features an integrated slot supporting LECOM-A (RS232), LECOM-B (RS485), and LECOM-LI (CAN bus) communication modules.
What does a solid red TRIP LED indicate on the inverter?
A solid red LED indicates an active TRIP fault condition, caused by overvoltage, overcurrent, overtemperature, or internal hardware issues. Specific fault codes can be viewed via parameter C013 or C016.
What motor power rating is supported by the 8102_E.3C.11?
The 8102_E.3C.11 inverter is rated for 1.5 kW output power, with a continuous output current rating of 3.9 A.
What should I check if fault code 'OU' is displayed?
Fault code 'OU' indicates DC bus overvoltage. Check if motor deceleration time is set too short causing regenerative feedback, or check for excessively high mains supply voltage.
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