Lenze 388509 2002B.2C Frequency Inverter – 2000 Series 0.75 kW
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Product Information
The Lenze 388509, designated model type 2002B.2C, is a compact 0.75 kW (1.1 kVA) frequency inverter engineered for precise speed regulation of AC induction motors within the Lenze 2000 Series platform. Designed for flexible single-phase or three-phase 230 V AC mains connections across a 190 V AC to 260 V AC supply range, the drive supplies a continuous output current of 4.0 A with an output frequency range up to 480 Hz. Operating via V/f characteristic control with configurable linear or quadratic performance curves and adjustable boost, this drive is widely utilized in conveyor belt speed regulation, industrial pumps, ventilation fans, and small processing machinery across packaging, food processing, and HVAC facilities.
Interfacing the 2002B.2C into an automated machine relies on its flexible onboard control terminals and an exchangeable front module slot. Onboard terminal connections include four programmable digital inputs, one multi-range analog setpoint input supporting 0–10 V, 0–20 mA, or 4–20 mA signals, and one open-collector digital status output. The front option slot accommodates operating devices such as the Lenze 2102IB keypad module or fieldbus communication adapters including LECOM RS232/RS485 and 2111IB/2112IB PROFIBUS units. Commissioning a spare inverter requires transferring parameter settings, which are stored in non-volatile internal EEPROM; configuration profiles can be cloned directly via the 2102IB keypad module or uploaded using Lenze Global Drive Control (GDC) PC software to align the drive with original operating specifications.
Diagnostic information is communicated via front panel LED status indicators and software diagnostic registers. A solid green Betrieb/Ready LED signals a healthy internal power supply, while a red Störung/Fault LED lights solid or flashes when an operational error occurs. Specific fault codes, such as overtemperature (OH), output overcurrent or short circuit (OC1), DC bus overvoltage (OU), and undervoltage (LU), can be read through the 2102IB keypad or GDC software interface. First-line troubleshooting involves checking mains line voltage, verifying input power terminal tightness, inspecting motor insulation, and clearing cooling fins. If internal hardware degradation or power section damage occurs, field repairs are not feasible, and replacing the drive or sourcing a fully tested exchange unit through ABC Industrial Parts provides a reliable pathway back to production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | 388509 |
| Model / Type | 2002B.2C |
| Product Family | 2000 Series |
| Component Type | Frequency Inverter |
| Rated Power | 0.75 kW |
| Apparent Power | 1.1 kVA |
| Supply Voltage Range | 190 - 260 V AC |
| Mains Input Current (1-Phase) | 7.2 A |
| Mains Input Current (3-Phase) | 4.2 A |
| Output Voltage | 0 - 230 V AC |
| Continuous Output Current | 4.0 A |
| Output Frequency Range | 0 - 480 Hz |
| Control Method | V/f Characteristic Control (Linear/Quadratic with adjustable boost) |
| Digital Inputs | 4 |
| Analog Inputs | 1 (0-10V / 0-20mA / 4-20mA) |
| Digital Outputs | 1 (Open-Collector) |
| Lifecycle Status | Discontinued |
Programming and Configuration
The Lenze 388509 (2002B.2C) frequency inverter relies on non-volatile internal EEPROM storage to preserve all operational parameters, control curves, and system configurations during complete power isolation. Parameter adjustment is performed either locally using the detachable 2102IB operating keypad or remotely via a PC connected through a LECOM communication module running Lenze Global Drive Control (GDC) software.
When replacing an existing drive, parameter settings must be cloned to ensure identical motor performance and control response. The 2102IB keypad module supports direct parameter copying between units, allowing technicians to upload data from a donor inverter and transfer it into a replacement drive without manual entry. Alternatively, parameter files saved in GDC software can be written directly to the replacement unit, including custom V/f characteristic curve adjustments, acceleration/deceleration ramps, and I/O function assignments.
Communication and System Integration
System integration with the Lenze 2002B.2C frequency inverter is supported through its integrated control terminals and modular front expansion interface. Terminal connections accommodate four digital inputs for run commands and interlocks, one multi-range analog input supporting 0–10 V, 0–20 mA, or 4–20 mA speed setpoints, and an open-collector digital output for operational status feedback to higher-level automation controllers.
For fieldbus networking, the drive features an exchangeable front module slot that accepts LECOM RS232/RS485 modules or 2111IB and 2112IB PROFIBUS communication modules. Integrating these fieldbus interfaces enables remote control commands, real-time frequency setpoint transmission, and diagnostic register querying directly from a host PLC or SCADA system.
Diagnostics and Status Indication
Real-time status indication on the Lenze 388509 (2002B.2C) is provided by dual-color status LEDs located on the front of the unit. The green Betrieb/Ready LED remains illuminated when the inverter power supply is healthy and the unit is ready for operation. A red Störung/Fault LED illuminates solid or flashes upon detection of a fault condition, indicating that intervention or diagnostic lookup is required.
Detailed fault diagnostics can be extracted using the 2102IB operating keypad or by querying diagnostic registers using Lenze Global Drive Control (GDC) software over a LECOM interface. Error codes identify operational faults such as overtemperature, phase loss, communication dropouts, and overcurrent conditions, directing maintenance personnel to the affected power or control stage.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Betrieb / Ready | Green - Solid | Inverter power supply healthy; unit is ready or operating |
| Störung / Fault | Red - Solid or Flashing | Fault condition detected |
Replacement and Spare Part Considerations
As part of the discontinued Lenze 2000 Series, the 388509 (2002B.2C) frequency inverter is an essential spare part for maintaining legacy production equipment. When sourcing a replacement unit, exact matching of the part number 388509 and model designation 2002B.2C ensures hardware and power stage compatibility with existing motor wiring and mounting infrastructure.
Before putting a replacement drive into service, parameter backup restoration from the original unit or stored GDC software files is necessary. In cases where an existing inverter has suffered control board memory corruption or EEPROM failure (EE code), ABC Industrial Parts offers assistance with tested replacement units and parameter extraction from donor hardware to restore machine operation.
For long-term plant modernizations, direct functional replacement paths are available in the Lenze i500 inverter family, specifically the i510 and i550 cabinet inverter series. However, maintaining direct 2002B.2C replacement stock eliminates the need for mechanical redesign, rewiring, or PLC program modifications on active production lines.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OH | Overtemperature | Heatsink temperature exceeded allowable limit. | Insufficient cooling, ambient temperature too high, fan failure, overload. | Improve enclosure ventilation, clear heatsink cooling fins, reduce load or switching frequency. |
| OC1 | Short Circuit / Earth Fault | Overcurrent triggered by short circuit or ground fault at the inverter output. | Short circuit between output phases, earth fault in motor winding or cable, motor cable too long. | Check motor and motor wiring for short circuits and insulation resistance; check motor cable length. Internal power section defect requires repair. |
| OC2 | Acceleration Overcurrent | Overcurrent during motor acceleration phase. | Acceleration time (Ti) set too short, motor mechanical overload or jammed shaft, incorrect motor parameters. | Increase acceleration time, check motor size and mechanical load for jamming. |
| OC3 | Overcurrent in Constant Operation | Overcurrent during steady-state constant speed operation. | Sudden load peak, mechanical blocking, transient fault. | Check mechanical load dynamics, verify motor rated parameters. |
| OU | DC Bus Overvoltage | Voltage in the DC bus circuit exceeded the upper shut-down threshold. | Excessive regenerative energy from motor during deceleration, deceleration time set too short. | Increase deceleration time (Td) or install braking resistor / brake module if supported. |
| LU | DC Bus Undervoltage | Voltage in the DC bus dropped below the minimum operating threshold. | Mains supply voltage too low, mains phase failure, temporary power interruption. | Check mains voltage, verify input fuses and wiring tightness. |
| OL | Motor Overload (I2t) | I2t thermal overload monitoring triggered due to continuous operation above rated current. | Motor operated at low speed with high continuous current without forced cooling, mechanical overload. | Reduce motor load, install forced cooling fan on motor, adjust I2t monitoring parameters. |
| EE | EEPROM Memory Error | Checksum fault or corruption detected in internal parameter storage. | Power failure during parameter write, internal EEPROM chip failure. | Reset parameters to factory default settings and reconfigure. If fault persists, internal hardware fault requires unit replacement. |
| CE | Communication Fault | Interruption or error detected on the LECOM serial / fieldbus interface. | Loose cable, baud rate mismatch, electromagnetic interference, host controller timeout. | Check communication cable, shielding, termination, and communication watchdog parameters. |
| LP | Mains Phase Failure | Loss of an input phase detected under load. | Blown input fuse, loose terminal connection, asymmetrical power grid. | Check supply line fuses, power terminals, and line voltage balance. |
Frequently Asked Questions
How do I backup and transfer parameter settings to a replacement Lenze 388509 drive?
Parameter settings on the Lenze 388509 (2002B.2C) are stored in internal non-volatile EEPROM. Parameters can be copied using the Lenze 2102IB operating keypad module by reading from the source drive and transferring to the replacement, or saved and written using Lenze Global Drive Control (GDC) PC software via a LECOM interface module.
What power supply requirements does the Lenze 2002B.2C inverter require?
The inverter operates on a single-phase or three-phase supply voltage range of 190 V AC to 260 V AC at 50/60 Hz. Mains input current is 7.2 A for 1-phase operation and 4.2 A for 3-phase operation, delivering a 0.75 kW (1.1 kVA) output rating.
What do the front LED indicators on the Lenze 388509 indicate?
The solid green Betrieb/Ready LED indicates that the inverter power supply is healthy and ready for operation. A solid or flashing red Störung/Fault LED indicates that an operational fault condition has been detected.
How do I clear an OH or OC1 fault code on the Lenze 2002B.2C?
An OH fault indicates heatsink overtemperature; clear cooling fins, check enclosure ventilation, and ensure ambient temperatures are within limits. An OC1 code indicates an output short circuit or earth fault; inspect motor windings and motor cabling for insulation faults or short circuits. An internal power section failure will require drive replacement or repair.
Is there a modern successor available for the Lenze 2000 series 388509 inverter?
Yes, Lenze offers modern cabinet inverter options within the i500 series, such as the i510 and i550 inverter models, as recommended functional upgrade paths for system modernizations.
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