Lenze 8303 A.1K.23 8300 Series 1.5kW Frequency Inverter
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Product Information
The Lenze 8303 A.1K.23 is a 1.5 kW 3-phase AC frequency inverter drive from the Lenze 8300 Series, engineered for precise motor speed regulation in industrial automation systems. Operating with a nominal supply voltage of 400V AC across an input range of 323V to 528V AC, this compact drive delivers a continuous rated output current of 3.9 A to standard three-phase asynchronous motors. It supports both open-loop vector control and configurable V/f characteristic curves, enabling smooth torque delivery and dynamic speed adjustment over an output frequency range from 0 to 480 Hz at a 16 kHz switching frequency. The unit is designed for panel mounting across applications such as material handling conveyors, packaging machinery, industrial ventilation fans, and processing equipment.
For system wiring and control integration, the 8303 A.1K.23 includes four programmable digital inputs, one flexible analog input supporting 0-10V, 0-20mA, or 4-20mA signals, one 0-10V analog output, and a dedicated fault relay output. Fieldbus and serial communications are facilitated via an extension slot accepting option modules such as LECOM-A RS232, LECOM-B RS485, the 2111 CAN Systembus module, or the 2131 PROFIBUS-DP module. Commissioning a replacement unit requires parameter alignment, as operational parameters are preserved internally across dual non-volatile EEPROM parameter sets. Parameters can be backed up, restored, or cloned using the pluggable 2102 Operating Keypad module or via PC using Lenze Global Drive Control (GDC) software, with expert support available through ABC Industrial Parts for parameter transfer and replacement unit sourcing.
System status and fault conditions are signaled directly on the drive through dual panel LEDs, featuring a solid or flashing Green LED for operation and controller inhibit state alongside a Red LED indicating active trip conditions. Comprehensive troubleshooting and diagnostic status word readouts can be performed using the 2102 keypad display, GDC diagnostic software, or fieldbus networks. Common trip causes include overcurrent during acceleration (OC1), deceleration (OC2), or constant speed (OC5), DC bus overvoltage (OU), undervoltage (LU), and thermal overload conditions (OH, OH4). Internal memory corruptions such as an EE fault code indicate internal hardware issues if a factory parameter reset fails, making hardware replacement or exchange through ABC Industrial Parts the quickest solution to minimize machine downtime.
Technical Specifications
| Rated Power | 1.5 kW |
| Supply Voltage | 400 V AC |
| Supply Voltage Range | 323 - 528 V AC |
| Rated Current | 3.9 A |
| Output Voltage | 0 - 400 V AC |
| Output Frequency | 0 - 480 Hz |
| Switching Frequency | 16 kHz |
| Control Method | V/f characteristic control / Open-loop vector control |
| Digital Inputs | 4 |
| Analog Inputs | 1 (0-10 V / 0-20 mA / 4-20 mA) |
| Analog Outputs | 1 (0-10 V) |
Programming and Configuration
Drive configuration for the Lenze 8303 A.1K.23 is performed using Lenze Global Drive Control (GDC) software or the pluggable 2102 Operating Keypad module. All drive settings are stored in internal EEPROM memory across dual non-volatile parameter sets, allowing engineers to maintain backup or alternative configuration profiles directly on the device.
Key configuration routines include adjusting acceleration ramp times (C012), deceleration ramp times (C013), and setting maximum output frequency limits (C011). In instances where memory data is corrupted or when re-commissioning a unit for a new application, parameter C002 can be executed to reload factory default settings before transferring custom parameters.
Communication and System Integration
The Lenze 8303 A.1K.23 frequency inverter features an integrated option slot that accepts fieldbus and serial communication modules. The drive can be integrated into serial networks using LECOM-A (RS232) or LECOM-B (RS485) modules, or connected to fieldbus networks using the 2111 CAN / Systembus module or 2131 PROFIBUS-DP module.
For direct hardwired integration, the drive provides four digital inputs, one multi-range analog input (supporting 0-10V, 0-20mA, or 4-20mA), one 0-10V analog output, and an integrated fault relay output. Fieldbus node addresses and serial baud rate parameters must be matched with the master controller configuration to ensure accurate status word reading and remote control.
Diagnostics and Status Indication
Front-panel visual diagnostics on the Lenze 8303 A.1K.23 are provided by two dedicated LED indicators. The Green LED signals operational status, remaining continuously lit when the drive is active and flashing when controller inhibit is active. The Red LED lights up continuously during active trip conditions or flashes error code sequences.
Detailed fault analysis is accessible through the display readout of the pluggable 2102 Operating Keypad module, the diagnostic monitor in Global Drive Control (GDC) software, or fieldbus status word registers. The drive maintains a fault history log in parameter memory, retaining the register of the most recent trip event for rapid post-fault inspection.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Green LED (Operation / Ready) | Green - Solid / Flashing | Drive active or ready for operation when illuminated continuously; flashing indicates drive inhibitor / controller inhibit. |
| Red LED (Trip / Fault) | Red - Solid / Flashing | Fault condition active when illuminated continuously or blinking specific error codes. |
Replacement and Spare Part Considerations
When installing a replacement Lenze 8303 A.1K.23 drive, match the part number exactly to maintain identical current, voltage, and power specifications. Parameter backups should be copied from the donor drive using the 2102 keypad module or GDC software prior to placing the spare unit into service.
Any installed communication interface modules—such as LECOM serial modules or PROFIBUS/CAN options—must be swapped into the replacement drive's extension slot. Ensure that fieldbus DIP switches, node addresses, and terminal jumpers match the original drive hardware setup. For long-term modernization, migration paths are available using the current Lenze i550 cabinet inverter series.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Short circuit / Overcurrent during acceleration | Output current exceeded instantaneous overcurrent threshold during motor acceleration phase. | Short circuit on motor output terminals, ground fault, acceleration ramp time too short, motor improperly dimensioned. | Check motor wiring and insulation, increase acceleration time parameter (C012), verify motor parameters. |
| OC2 | Short circuit / Overcurrent during deceleration | Output current exceeded threshold during motor deceleration phase. | Deceleration ramp time too short, short circuit on output, ground fault. | Increase deceleration time parameter (C013), inspect motor cable and winding. |
| OC5 | Overcurrent during constant speed operation | Drive exceeded overcurrent threshold during steady-state operation. | Abrupt load spike, mechanical blockage/jam, inter-turn short in motor. | Check mechanical drive load for jamming, inspect motor. |
| OU | DC bus overvoltage | Intermediate circuit DC voltage exceeded upper limit. | Excessive regenerative energy from motor during deceleration, deceleration ramp time too short, mains voltage supply too high. | Extend deceleration time, fit optional braking chopper/resistor, verify mains supply voltage. |
| LU | DC bus undervoltage | DC bus voltage dropped below minimum threshold during operation. | Mains voltage drop, supply phase failure, power supply interruption, input fuse blown. | Check mains voltage supply, check input fuses and line contactor. |
| OH | Overtemperature heatsink | Heatsink temperature exceeded upper thermal trip point. | Inadequate cooling airflow, heatsink dirty/blocked, ambient temperature excessive, fan defective. | Clean heatsink fins, ensure adequate ventilation space around unit, check panel cooling. |
| OH4 | Motor thermal overload (PTC active) | Motor thermistor/PTC connected to control terminals has triggered. | Motor thermal overload, cooling fan failure on motor, prolonged low-speed operation under heavy load. | Allow motor to cool down, inspect load and forced-cooling fan on motor. |
| EE | EEPROM checksum error | Data corruption detected in internal parameter EEPROM memory. | Internal hardware failure, power loss during parameter save operation. | Reload factory default settings (C002). Internal hardware fault — if error persists after factory reset, replace drive unit. |
| CE0 | LECOM communication error | Loss of communication via serial LECOM interface. | Loose cable, incorrect baud rate/address setting, master controller timeout. | Check serial connection wiring, check LECOM baud rate and address settings in parameters. |
| CE1 | Fieldbus communication module error | Fault or line interruption detected on optional fieldbus module (e.g. PROFIBUS/CAN). | Fieldbus cable fault, bus termination missing, master controller offline. | Verify fieldbus connections, bus termination resistors, and fieldbus master status. |
| LP | Mains phase failure | Phase unbalance or phase loss detected on 3-phase AC input supply. | Mains supply phase failure, blown line input fuse, loose input terminal connection. | Measure input voltage across all phases L1, L2, L3; check mains fuses. |
| NMAX | Maximum speed exceeded | Motor speed/frequency exceeded maximum threshold. | External mechanical drive over-speed, incorrect encoder/speed setpoint configuration. | Check mechanical load driving motor, verify speed limit parameter C011. |
| Er | External fault | Trip command triggered via digital input configured for external fault signal. | External safety circuit, external monitoring relay, or external machine sensor tripped. | Check external circuit wired to digital input. |
Frequently Asked Questions
What software is used to program the Lenze 8303 A.1K.23 drive?
The drive is programmed using Lenze Global Drive Control (GDC) software on a PC, or configured manually using the pluggable 2102 Operating Keypad module.
How can parameter settings be transferred to a replacement 8303 A.1K.23 unit?
Parameters can be saved onto a pluggable 2102 Operating Keypad module and transferred directly to the replacement drive, or backed up and restored via a PC running Lenze Global Drive Control (GDC) software.
What does a flashing Green LED indicate on the drive front panel?
A flashing Green LED indicates that controller inhibit / drive inhibitor is active, preventing the drive from supplying voltage to the motor.
What steps should be taken if the drive displays an EE fault code?
An EE fault code indicates an EEPROM checksum error. Reset the unit to factory default settings using parameter C002. If the fault persists after a reset, internal hardware failure has occurred and the drive must be replaced.
Which fieldbus modules are compatible with the Lenze 8303 A.1K.23 extension slot?
The extension slot accepts the 2131 PROFIBUS module, the 2111 CAN / Systembus module, and LECOM-A (RS232) or LECOM-B (RS485) serial adapters.
What is the modern successor series for legacy 8300 series inverters?
The Lenze i550 cabinet inverter series serves as the current replacement line for legacy 8300 series frequency drives.
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