Lenze EVF9327-EV 9300 Vector Frequency Inverter 15 kW
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Product Information
The Lenze EVF9327-EV is a 15 kW vector frequency inverter from the 9300 Vector product family, designed for dynamic speed and torque regulation of 3-phase AC electric motors. Delivering a continuous rated current of 32 A on a 3-phase mains voltage of 400 V AC (with an operating supply voltage range of 320 V AC to 528 V AC), this frequency inverter generates a variable output from 0 to 400 V AC with an output frequency range of 0 to 480 Hz. This specific variant features an unfiltered design without an internal RFI filter, allowing system builders to select and connect external interference suppression, such as Lenze EZF series external filters, according to specific panel layout requirements. The unit supports multi-mode motor control, including sensorless vector control, V/f characteristic control, and closed-loop vector control, providing dynamic speed accuracy and motor management across packaging machinery, material handling, automotive production, and processing equipment.
For integration into machine automation networks, the EVF9327-EV is equipped with onboard control I/O consisting of 6 digital inputs, 4 digital outputs, 2 analog inputs, and 2 analog outputs, alongside a built-in CANopen system bus interface. It also includes a modular Automation Interface (AIF) slot designed to accept optional fieldbus communication modules—such as the EMF2133IB PROFIBUS-DP, EMF2175IB DeviceNet, or EMF2113IB INTERBUS modules—or the EMZ9371BC operating keypad. Commissioning a replacement unit requires transferring machine parameters, as the drive supports up to four onboard switchable parameter sets. Transferring configuration settings from an existing unit to a spare drive can be executed using Lenze Global Drive Control (GDC) or EASY Starter software, or directly using the plug-in keypad. ABC Industrial Parts can assist maintenance teams with acquiring fully tested replacement drives and compatible options to restore production lines smoothly.
Visual diagnostic feedback on the drive is provided by three status LEDs located on the front cover, reporting power stage activity, enable state, and TRIP conditions. Operating faults such as overcurrent, overvoltage, motor overtemperature, or fieldbus communication timeouts are recorded in an internal diagnostic buffer that stores the last eight TRIP events with codes and timestamps. While routine issues like parameter discrepancies or external wiring faults can be resolved through field adjustments, internal hardware faults involving the power stage or EEPROM failure require component repair or drive exchange. When internal hardware failures occur, sourcing a tested exchange unit from ABC Industrial Parts offers a fast and effective solution for minimizing machine downtime.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVF9327-EV |
| Model / Type | 9300 Vector Frequency Inverter |
| Product Family | 9300 Vector |
| Component Type | Frequency Inverter |
| Rated Power | 15 kW |
| Supply Voltage | 400 V AC |
| Supply Voltage Range | 320 - 528 V AC |
| Rated Current | 32 A |
| Output Voltage Range | 0 - 400 V AC |
| Output Frequency Range | 0 - 480 Hz |
| Switching Frequency | 8 kHz |
| Digital Inputs | 6 |
| Digital Outputs | 4 |
| Analog Inputs | 2 |
| Analog Outputs | 2 |
| Onboard Fieldbus | CANopen / System Bus (CAN) |
Programming and Configuration
Configuring the Lenze EVF9327-EV vector inverter relies on Lenze software tools, specifically Global Drive Control (GDC) and EASY Starter software, or the optional EMZ9371BC plug-in keypad. The drive memory architecture allows up to four complete, switchable parameter sets to be stored directly onboard. This capability enables rapid operational adaptation for machinery that processes multiple product types or requires distinct motion profiles without re-downloading parameter files during operation.
Parameter memory management relies on internal EEPROM storage, preserving system parameters, motor data, tuning values, and fieldbus settings through power cycles. During replacement or maintenance procedures, engineers can upload valid parameter files from an operational unit or backup repository using GDC software over the system bus, or copy parameter sets using the EMZ9371BC operating keypad. Correctly aligning motor parameters, acceleration and deceleration ramps, and control mode settings ensures operational compatibility when replacing an existing drive.
Communication and System Integration
The EVF9327-EV frequency inverter features a built-in CANopen system bus interface operating at speeds up to 500 kbit/s. This integrated CAN interface enables direct drive-to-drive cross-communication, real-time control synchronisation, and rapid data exchange with central automation controllers without requiring additional communication hardware.
To adapt to broader industrial network topologies, the inverter features a modular Automation Interface (AIF) slot on the front panel. This slot accommodates optional communication modules, including the EMF2133IB for PROFIBUS-DP, EMF2175IB for DeviceNet, and EMF2113IB for INTERBUS. These modules allow the inverter to communicate directly with higher-level PLCs and SCADA systems, providing full fieldbus access to drive diagnostics, status registers, and motion control commands.
Diagnostics and Status Indication
Visual monitoring of the EVF9327-EV is provided by three diagnostic LEDs located on the front cover of the inverter. These indicators report the operating state of the power stage, control enable status, and active fault or current limiting conditions in real time, allowing technicians to perform visual triage during machine troubleshooting.
For detailed fault analysis, the inverter maintains a diagnostic history buffer that records the last eight TRIP fault events along with their associated codes and timestamps. This fault buffer can be accessed and evaluated through parameter code C0168 via the Lenze EMZ9371BC keypad or using GDC diagnostic software, giving maintenance personnel visibility into intermittent operational trips and system faults.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Red LED (TRIP) | Red - Solid/Active | Fault present / Inverter in TRIP state. Hardware or application error triggered drive shut-off. |
| Green LED (RUN) | Green - Solid | Operation / Inverter enabled and running normally. |
| Yellow LED (IMP / Current Limit) | Yellow - Solid/Flashing | Pulse inhibit active or max current limit reached. |
Replacement and Spare Part Considerations
When installing a replacement Lenze EVF9327-EV inverter, it is essential to note that this specific unit is supplied as an unfiltered design variant without an internal RFI filter. If the host cabinet or machine installation relies on external RFI suppression to meet electromagnetic compatibility standards, external line filters such as Lenze EZF series RFI filters must be preserved or installed in series with the mains supply input.
A replacement unit must be loaded with the active machine parameter set prior to enabling motor operation. Because a replacement drive ships with default settings or donor parameters, downloading the exact parameter configuration using Global Drive Control (GDC) software or transferring stored parameter sets via the EMZ9371BC keypad is critical. Verifying motor control modes, maximum current thresholds, and CANopen/fieldbus node addresses prevents fieldbus conflicts and unexpected machine behavior.
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 | Short circuit at motor terminals or power stage output. | Short circuit in motor winding or motor cable; excessive acceleration ramp. | Check motor and wiring for short circuits or ground faults; increase acceleration time. |
| OC2 | Earth Fault | Earth fault / ground fault detected at output phase. | Insulation damage in motor or motor cable; excessive ground leakage current. | Check motor cable and motor stator insulation using megohmmeter. |
| OC5 | Ixt Overload | Drive overload due to high continuous output current. | Continuous current higher than rated inverter current; mechanical block. | Check mechanical load and motor sizing; reduce duty cycle. |
| OU | Overvoltage DC Bus | DC bus voltage exceeded upper threshold level. | Regenerative energy from motor during deceleration; deceleration time set too short; missing or defective brake resistor. | Extend deceleration ramp time; verify external brake chopper and resistor connection. |
| LU | Undervoltage DC Bus | DC bus voltage fell below lower limit threshold. | Mains supply failure, supply voltage drop, or blown input fuse. | Check mains voltage input supply and fuses. |
| OH | Heatsink Overtemperature | Inverter heatsink temperature exceeded maximum safety threshold. | Cooling fan failed or clogged heatsink fins; ambient temperature too high. | Clean heatsink cooling fins; verify cooling fan operation and cabinet ventilation. |
| OH4 | Motor Temperature Switch Opened | Motor thermal contact or PTC sensor tripped. | Motor thermal overload or disconnected thermal contact wire. | Allow motor to cool down; check motor thermal protection circuit. |
| OH7 | Internal Ambient Overtemperature | Internal control board ambient temperature exceeded maximum limit. | Control cabinet cooling inadequate. | Improve cooling inside enclosure. |
| NMAX | Speed Limit Exceeded | Actual motor speed exceeded maximum allowable limit. | Speed feedback signal incorrect or feedback encoder malfunction. | Check encoder feedback connections and parameter settings. |
| CE0 | CAN Communication Error | System bus (CAN) communication timeout or loss of signal. | Bus cable disconnected, incorrect baud rate, or missing termination resistor. | Verify CAN wiring, termination resistors (120 Ohm), and baud rate settings. |
| P12 | Parameter Set Checksum Error | Checksum error in stored parameter set data. | Interrupted parameter transfer or EEPROM write error. | Reload factory default settings and re-download valid parameter set. |
| EE | EEPROM Access Fault | Internal EEPROM communication fault or defective memory chip. | Internal control board hardware damage. | Internal hardware fault — power cycle drive; if persistent, return unit for repair. |
| H05 | Internal Power Stage / Board Fault | Hardware error in internal power stage driving circuit. | Internal control board failure. | Internal hardware fault — repair or replace unit. |
Frequently Asked Questions
What software is used to configure and program the Lenze EVF9327-EV?
Configuration and programming are performed using Lenze Global Drive Control (GDC) or EASY Starter software. Alternatively, basic parameter adjustments and transfer can be executed using the optional EMZ9371BC plug-in keypad.
Does the EVF9327-EV frequency inverter include an internal RFI filter?
No, the EVF9327-EV is an unfiltered design variant manufactured without an internal RFI filter. External filtering, such as a Lenze EZF series filter, can be used if interference suppression is required for your control cabinet.
What fieldbus communication options are supported by the EVF9327-EV?
The inverter includes a built-in CANopen system bus interface. For other fieldbus protocols, optional AIF communication modules can be installed in the front slot, including EMF2133IB for PROFIBUS-DP, EMF2175IB for DeviceNet, and EMF2113IB for INTERBUS.
How can I view stored fault history on the EVF9327-EV inverter?
The inverter maintains a TRIP history buffer that stores the last eight fault codes and timestamps. This buffer can be read under parameter code C0168 using the EMZ9371BC keypad or via Global Drive Control (GDC) software.
What steps are required when replacing a faulty EVF9327-EV unit?
A replacement unit requires uploading the machine-specific parameter set using GDC software or transferring it from an EMZ9371BC keypad. Ensure that external RFI filters are wired correctly, verify communication node addresses, and confirm that all I/O terminal connections match the original wiring diagram.
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