Lenze EVF9326-EV 9300 Vector Frequency Inverter 11 kW
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Product Information
The Lenze EVF9326-EV is an 11 kW frequency inverter belonging to the 9300 Vector series, designed for precise speed and torque regulation of asynchronous AC motors and reluctance motors in high-dynamic industrial applications. Powered by a 3-phase AC supply ranging from 400 V to 480 V, with an operating tolerance range of 320 V to 528 V AC, this drive delivers a continuous rated output current of 23.5 A with an 8 kHz switching frequency and maximum output frequencies up to 480 Hz. Housed in an IP20 cabinet-mount enclosure, this specific variant is configured without an internal RFI interference suppression filter, accommodating customized control panel layouts that utilize centralized external noise filtering.
Integrating the drive into control systems relies on comprehensive onboard I/O and modular expansion interfaces. Physical connections include six programmable digital inputs, four digital outputs, two bipolar analog inputs, two bipolar analog outputs, and a dedicated TRIP fault relay. System-level networking is handled via an integrated CAN system bus or through the plug-in Automation Interface slot, which supports option cards such as PROFIBUS-DP (EMF2133IB), Interbus (EMF2113IB), or LECOM serial modules. Commissioning a spare unit requires transferring operating parameters, which can be completed using Lenze Global Drive Control software or cloned using the Keypad XT (EMF2102IB) module. Because the unit stores up to four parameter sets in non-volatile EEPROM memory, extracting stored parameters or seeking configuration transfer assistance from ABC Industrial Parts helps ensure the spare drive accurately matches original machine settings prior to operation.
Operational monitoring and status feedback are provided through diagnostic LEDs on the front faceplate, the TRIP relay output, and internal memory logs accessible via Keypad XT or software diagnostic windows. Status indications include DRV-RDY for ready state, IMP for active controller inhibit, and TRIP/DRV-ERR for fault alerts. Diagnostic parameter C0183 records fault history to isolate operational trips, such as output short circuits (OC1), DC bus overvoltage (OU), or heatsink overtemperature (OH). Routine field checks should verify mains power phases, motor winding insulation, and cooling airflow. If the drive reports EEPROM errors (EER) or internal self-test failures (H05), internal board faults cannot be serviced in the field; sourcing a fully tested exchange drive or sending the unit to ABC Industrial Parts for repair offers an effective solution to restore production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVF9326-EV |
| Model / Type | 9300 Vector |
| Product Family | 9300 Series |
| Component Type | Frequency Inverter |
| Rated Power | 11 kW |
| Nominal Supply Voltage | 3x 400 / 480 V AC |
| Supply Voltage Range | 320 - 528 V AC |
| Rated Output Current | 23.5 A |
| Maximum Output Frequency | 480 Hz |
| Switching Frequency | 8 kHz |
| Protection Rating | IP20 |
| RFI Suppression | Without internal RFI filter |
| Programmable Digital Inputs | 6 |
| Programmable Digital Outputs | 4 |
| Bipolar Analog Inputs | 2 |
| Bipolar Analog Outputs | 2 |
| Fault Relay Output | 1 (TRIP relay K11/K12/K14) |
Programming and Configuration
Parameter management for the Lenze EVF9326-EV inverter is performed either through local display hardware or PC-based programming tools. Engineering setup and real-time monitoring are supported via Lenze Global Drive Control (GDC) software, which allows users to view diagnostic logs, tune motor parameters, and save project configurations. For field setup without a PC, the optional Keypad XT (EMF2102IB) plugs directly into the front panel to provide parameter access and cloning features.
The inverter contains non-volatile EEPROM memory capable of storing up to four complete parameter sets. Diagnostic monitoring parameters, including operating status parameter C0051 and fault history log C0183, allow technicians to evaluate performance and historical trip events. When transferring configurations to a new unit, factory settings can be restored via code C0002 before uploading the stored project data or transferring settings using terminal strips and memory cloning.
Communication and System Integration
The EVF9326-EV comes standard with an integrated CAN system bus accessible via control terminals X4 and X5. This interface enables high-speed inter-drive communication, allowing direct multi-axis drive networking, dynamic speed synchronization, and coordinated master-slave controller operations across drive lines without requiring external gateway hardware.
For integration into broader industrial fieldbus networks, the drive features a plug-in Automation Interface (AIF) slot. This slot accommodates modular communication cards, including PROFIBUS-DP (EMF2133IB), Interbus (EMF2113IB), and LECOM serial interface modules. Proper fieldbus operation requires verifying module seating, node address switches, and network line termination resistors.
Diagnostics and Status Indication
Drive status and operational health are indicated through three LEDs located on the front faceplate alongside a dedicated TRIP fault relay (terminals K11/K12/K14). Further diagnostic depth is available via the Keypad XT display panel or through the Global Drive Control software oscilloscope and error log windows, which reference parameter C0183 for detailed fault recording.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRV-RDY | Green - Solid | Drive status / ready for operation |
| IMP | Yellow - Solid | Pulse inhibit / controller inhibit active |
| TRIP / DRV-ERR | Red - Solid/Flashing | Fault / active error status |
Replacement and Spare Part Considerations
When swapping a damaged Lenze EVF9326-EV drive, matching the exact part number suffix is necessary. The EV designation identifies this unit as an inverter constructed without an internal RFI filter. Replacing this unit with a variant containing an integrated filter may affect cabinet dimensions or interference control schemes.
To minimize replacement downtime, the EVF9326-EV features plug-in control terminal strips, allowing wiring assemblies to be detached without disconnecting individual signal wires. Before powering on the replacement inverter, ensure that parameter sets are loaded via Global Drive Control software or cloned using the Keypad XT module, and confirm that any optional AIF fieldbus modules are securely transferred into the option slot.
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 the inverter output power terminals (U, V, W) | Motor winding short circuit, motor cable damaged, ground fault, acceleration time too short | Check motor cable and motor insulation; check acceleration time settings; if fault persists with motor disconnected, internal inverter hardware fault — return unit for repair |
| OC2 | Earth Fault | Ground fault / earth fault at the inverter output | Motor cable capacitance too high, ground leakage in motor or cable | Check motor cable for phase-to-ground short, check motor insulation with megohmmeter |
| OC5 | I x t Overload | Continuous motor overload limit exceeded (I x t integration threshold) | Drive operated above rated current for prolonged time, mechanical jam, wrong motor data set | Check mechanical load for blockage; check motor parameters in drive configuration; reduce load |
| OU | Overvoltage DC Bus | DC bus voltage exceeded maximum safety limit (approx. 770 V DC) | Regenerative energy from motor during deceleration; deceleration time too short; missing or failed brake chopper/resistor | Extend deceleration time (ramp down); install or check braking resistor and brake chopper |
| LU | Undervoltage DC Bus | DC bus voltage fell below minimum operation threshold (approx. 400 V DC) | Mains supply supply voltage failure, supply phase missing, mains supply drop under load | Check supply voltage, fuses, and main contactor; verify all 3 input phases are present |
| OH | Heatsink Overtemperature | Heatsink temperature exceeded maximum safety threshold (approx. 85°C / 90°C) | Inadequate control cabinet cooling, ambient temperature too high, fan failure, dirty heatsink fins | Clean heatsink fins, check cabinet fan and airflow, verify internal heatsink fan operation |
| OH1 | Heatsink Temperature High | Heatsink temperature warning threshold exceeded | High ambient temperature, heavy load, clogged cooling channel | Improve cooling, clean heatsink, reduce load |
| OH3 | Motor Overtemperature | Motor temperature sensor trip (PTC or KTY connected to terminals T1/T2) | Motor thermal overload, insufficient motor cooling, defective temperature sensor or broken wire | Allow motor to cool down, check motor load and cooling fan, check sensor wiring on T1/T2 |
| OH4 | Inverter Interior Overtemperature | Ambient / internal control board temperature inside drive too high | Control cabinet temperature excessive, internal air circulation blocked | Check enclosure air conditioning and ventilation |
| OH7 | Motor Temperature Sensor Wire Break | Open circuit / broken wire detected on motor temperature sensor circuit (T1/T2) | Cable disconnected, wire break, defective PTC/KTY sensor | Inspect motor temperature sensor cable and connections |
| NMAX | Overspeed Exceeded | Actual motor speed exceeded maximum configured speed limit | Incorrect speed controller tuning, field weakening failure, encoder signal disturbance | Check speed controller parameters, verify encoder wiring and shield connection |
| EER | EEPROM Error | Internal EEPROM memory checksum error during parameter read/write | Electromagnetic interference during parameter store, corrupt internal memory, hardware memory defect | Re-load factory default parameters (C0002) and write back project parameters; if fault persists, non-field-serviceable board failure — replace unit |
| PR0 | Program Error 0 | Internal system software execution / task overflow fault | Internal firmware execution error or corrupted configuration memory | Perform power cycle; re-download parameter set; if fault recurs, internal hardware fault — replace inverter |
| PR1 | Program Error 1 | Internal processor system exception | Processor logic fault or control board interference | Power cycle unit; if persistent, internal hardware failure — return unit for repair |
| H05 | Internal Hardware Fault | Hardware self-test failed during initialization or runtime | Internal board component failure, power supply circuit fault | Internal hardware failure — not field serviceable. Unit must be replaced or returned for repair |
| CE0 | Communication Error AIF | Communication failure between inverter main controller and AIF module | AIF communication module not seated properly, bad fieldbus connection, defective module | Check seating of AIF module in option slot; check fieldbus cabling and termination resistors |
| CE1 | CAN System Bus Error | CANbus error state active / bus-off status on system bus (X4/X5) | Incorrect baud rate setting, missing line termination resistors (120 Ohm), damaged bus line | Verify CAN wiring, check bus termination switches/resistors, verify node ID and baud rate settings |
Frequently Asked Questions
How are parameter sets transferred when replacing a Lenze EVF9326-EV?
Parameter configurations can be downloaded using Lenze Global Drive Control (GDC) software or cloned directly between units using the plug-in Keypad XT (EMF2102IB) memory module. The inverter supports up to four parameter sets stored in internal EEPROM memory.
Does the EVF9326-EV inverter include an integrated RFI filter?
No, the EVF9326-EV model is designed without an internal RFI interference suppression filter. It is intended for installation in control enclosures that utilize centralized external noise suppression.
What fieldbus communication options are compatible with the EVF9326-EV?
In addition to the standard onboard CAN system bus (terminals X4/X5), the drive features an Automation Interface (AIF) slot that supports plug-in modules including PROFIBUS-DP (EMF2133IB), Interbus (EMF2113IB), and LECOM.
What steps should be taken if the inverter reports fault code H05 or EER?
Fault code H05 indicates an internal hardware self-test failure, and EER signifies an EEPROM memory checksum failure. If resetting parameter defaults via C0002 does not resolve code EER, or if code H05 appears, an unserviceable internal hardware fault exists requiring unit repair or replacement.
What do the front panel status LEDs on the EVF9326-EV signify?
A solid green DRV-RDY LED indicates the drive is ready for operation, a solid yellow IMP LED shows pulse inhibit is active, and a solid or flashing red TRIP/DRV-ERR LED signals an active fault condition.
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