Lenze EVF9328-EV 9300 Vector 45kW Frequency Inverter
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Product Information
The Lenze EVF9328-EV is a 45 kW AC frequency inverter from the 9300 Vector series designed for precise speed and torque control of three-phase asynchronous AC motors in continuous heavy-duty industrial applications. Operating across an AC supply voltage range of 320 V AC to 528 V AC with an IP20 enclosure, this drive delivers a rated continuous output current of 89 A at an 8 kHz switching frequency or 110 A at 4 kHz. With a 150% peak current overload capacity of 133.5 A for up to 60 seconds, the unit effectively protects power electronics during severe mechanical load surges. Control modes include Sensorless Vector Control (SLVC), standard V/f characteristic control, and closed-loop vector control with encoder feedback via its integrated master frequency input, rendering it suitable for extruders, continuous conveyors, mixers, and industrial agitators.
System integration and drive communication rely on an onboard CAN system bus supporting high-speed inter-drive networking up to 500 kbit/s, along with a flexible Automation Interface (AIF) slot. The modular AIF slot accepts optional fieldbus cards such as PROFIBUS-DP (EMF2131IB), DeviceNet (EMF2173IB), Interbus (EMF2113IB), or serial LECOM RS-232/RS-485 modules (EMF2102IB / EMF2111IB). Commissioning a replacement unit requires transferring the parameter dataset, as a spare drive will not run properly on factory default settings alone. Up to four complete parameter sets can be stored in non-volatile EEPROM memory and transferred using a Lenze Keypad XT (EMZ9371BC) or Global Drive Control (GDC) software. Technical teams at ABC Industrial Parts can assist with parameter set extraction, backup restoration, and drive commissioning to minimize operational downtime.
Diagnostic information is provided through onboard status LEDs and digital monitors. A green DRIVE READY LED signals controller status, remaining solid during normal enabled operation or flashing when the controller is inhibited. A red FAIL / ERROR LED indicates trip conditions, slow flashing warnings, or rapid flashing internal failures. Fault tracking is aided by an internal memory buffer storing the last eight TRIP events with timestamps. Initial field troubleshooting should include checking line supply voltages (320-528 V AC), mains fuses, cooling fan operation, and motor connections. When internal hardware errors like H05 or persistent memory faults like EEr occur, the drive is not field-serviceable, making unit replacement or repair through ABC Industrial Parts the most reliable path back to production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVF9328-EV |
| Model / Type | 9300 Vector Frequency Inverter |
| Product Family | 9300 Vector |
| Component Type | Frequency Inverter |
| Rated Power | 45 kW |
| Supply Voltage Range | 320 - 528 V AC |
| Rated Input Current | 85 A |
| Continuous Output Current (8 kHz) | 89 A |
| Continuous Output Current (4 kHz) | 110 A |
| Max Peak Output Current | 133.5 A |
| Output Frequency Range | 0 - 480 Hz |
| Switching Frequency | 8 kHz |
| Power Dissipation | 1100 W |
| Ingress Protection Rating | IP20 |
| Control Methods | Sensorless Vector Control (SLVC), V/f control, Closed-loop Vector control |
Programming and Configuration
Programming and parameter adjustments for the Lenze EVF9328-EV are performed either through the detachable Keypad XT (EMZ9371BC) or using Lenze Global Drive Control (GDC) software connected via a PC interface. The drive features non-volatile EEPROM memory capable of holding up to four independent parameter sets, allowing versatile operation across different production setups or rapid configuration backup.
Commissioning requires defining key motor parameters, acceleration time (C0012), and deceleration time (C0013) to match specific mechanical loads. If parameter corruption occurs or a fresh start is required, setting code C0002 to 1 restores default factory configurations, after which custom control parameters and application settings must be reloaded.
Communication and System Integration
The EVF9328-EV includes a built-in CAN system bus operating at speeds up to 500 kbit/s. This interface allows direct inter-drive networking, master-slave frequency tracking, and synchronized multi-drive operation in continuous conveyor or processing systems. Proper bus operation requires correct node address configuration and 120-ohm termination resistors fitted at both ends of the CAN network.
Modular fieldbus integration is accomplished via the standard Automation Interface (AIF) slot. Depending on application needs, plug-in modules can be inserted to connect with upper-level automation networks, including PROFIBUS-DP (EMF2131IB), DeviceNet (EMF2173IB), Interbus (EMF2113IB), and serial LECOM RS-232 (EMF2102IB) or RS-485 (EMF2111IB) interfaces.
Diagnostics and Status Indication
Diagnostics on the Lenze EVF9328-EV are monitored via two front-panel LED indicators, the Keypad XT display screen, or the GDC software diagnostic monitor. An integrated fault history buffer automatically retains details and timestamps for the last eight TRIP events, facilitating thorough root-cause failure analysis during maintenance.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRIVE READY (Green LED) | Green - Solid / Flashing | Solid Green: Controller enabled and operating normally. Flashing Green: Controller inhibited (IMP/RFR disabled), drive ready. |
| FAIL / ERROR (Red LED) | Red - Solid / Flashing | Solid Red: TRIP fault active, power stage inhibited. Flashing Red Slow: Warning active. Flashing Red Fast: Internal hardware failure or memory corruption. |
Replacement and Spare Part Considerations
When replacing a Lenze EVF9328-EV drive, ensure that the physical part number and power rating match the original unit. Because thermal management and continuous current ratings depend on the operating switching frequency (89 A at 8 kHz versus 110 A at 4 kHz), system parameters must be verified to prevent thermal overload or unexpected trip conditions.
Spare units cannot be swapped in directly without parameter transfer. Before removing a faulty unit, clone the existing parameter sets to a Keypad XT module or save a parameter file via GDC software. Once the replacement inverter is installed and wired, download the parameter file and verify input line voltages (320-528 V AC), fieldbus slot seating, and CAN bus termination before enabling the controller.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OH | Heatsink Overheating | Inverter heatsink temperature exceeded maximum threshold. | Ambient temperature too high, cooling fan failed, dirty cooling fins, inadequate cabinet ventilation. | Check cabinet fan and ventilation, clear cooling fins, verify internal inverter fan function. |
| OH4 | Motor Overheating (PTC) | Motor temperature monitoring input on terminal X10 triggered. | Continuous motor overload, motor cooling fan defect, damaged PTC sensor cable. | Check mechanical load on motor, inspect motor external fan, verify PTC sensor wiring. |
| OU | DC Bus Overvoltage | DC bus voltage exceeded upper limit (>770 V DC). | Deceleration ramp too short, high regenerative energy from load, braking chopper or braking resistor disconnected/defective. | Increase deceleration time (C0013), connect or test external braking resistor. |
| LU | DC Bus Undervoltage | DC bus voltage dropped below lower limit (<430 V DC). | Mains supply line drop, phase failure, input fuse blown. | Check AC mains supply voltage, check line fuses and main switch. |
| OC1 | Overcurrent During Acceleration | Instantaneous peak current limit exceeded during acceleration phase. | Short circuit or ground fault in motor cable, acceleration ramp too fast, motor shaft blocked. | Check motor cable and winding insulation, increase acceleration time (C0012). |
| OC2 | Overcurrent During Deceleration | Instantaneous peak current limit exceeded during deceleration phase. | Deceleration ramp too steep, earth fault in motor circuit. | Increase deceleration time (C0013), inspect motor cabling. |
| OC5 | Overcurrent During Constant Operation | Instantaneous peak current limit exceeded during steady state run. | Sudden load impulse, mechanical binding, ground fault. | Inspect mechanical system for load spikes, check motor cable insulation. |
| LP1 | Motor Phase Failure | Motor phase loss detected at output terminals. | Open circuit in motor cable, loose terminal connection, blown output transistor. | Check output motor connections and continuity of motor windings. |
| CE0 | Automation Interface Fault | Communication failure on the automation slot (AIF / fieldbus). | Fieldbus master stopped, bus cable disconnected, loose module. | Check fieldbus wiring, check master controller state, ensure communication module is securely seated. |
| CE1 | CAN Bus Communication Error | Communication fault or bus-off on internal CAN system bus. | CAN bus wiring fault, missing 120 Ohm termination resistor, duplicate CAN node address. | Check CAN bus wiring and termination resistors at both ends, verify CAN node ID. |
| EEr | Internal Memory Fault | Corrupted EEPROM parameter memory. | Internal memory hardware error or interrupted write process. | Internal hardware fault — reset parameters to factory default (C0002=1). If error persists, return unit for repair or replace device. |
| H05 | Internal Hardware Error | Control board or internal bus hardware error. | Internal circuit board failure. | Internal hardware failure — unit is not field-serviceable, return for repair or replace unit. |
| Pr0 | Parameter Fault | Inconsistent parameter dataset on power-up. | Power failure during parameter save. | Reload factory default settings (C0002=1) and reconfigure parameter settings. |
| P12 | Motor I2t Overload | Thermal motor protection calculation limit reached. | Motor operated above rated current for extended duration. | Reduce continuous motor load, inspect motor ventilation. |
| Sd2 | Speed Feedback Signal Fault | Loss or distortion of encoder/resolver feedback signal. | Defective feedback cable, broken wire, missing shield, damaged encoder. | Check encoder/resolver wiring, shielding, and connector X8. |
Frequently Asked Questions
What software is required to configure the Lenze EVF9328-EV?
The drive is configured using Lenze Global Drive Control (GDC) software via a PC connection or directly using the optional Keypad XT (EMZ9371BC) operator panel.
Can a replacement EVF9328-EV drive be installed directly out of the box?
No, a replacement drive requires configuration transfer. Parameter sets stored in the EEPROM must be downloaded from a backup file or cloned from the old unit using Keypad XT or GDC software before operating the motor.
Which communication protocols are supported by the EVF9328-EV?
The drive includes an onboard CAN system bus running up to 500 kbit/s. Additional fieldbuses can be added via the AIF slot using modules for PROFIBUS-DP, DeviceNet, Interbus, or LECOM RS-232/RS-485.
What does a fast-flashing red LED indicate on the EVF9328-EV?
A fast-flashing red FAIL/ERROR LED indicates an internal hardware failure or memory corruption. If resetting parameters does not resolve the condition, the unit requires repair or replacement.
How can past fault history be accessed on the EVF9328-EV?
The drive stores the last eight TRIP events in its internal fault history memory buffer, which can be viewed using the Keypad XT display or through the GDC diagnostic software monitor.
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