Lenze EVF9328-EH 9300 Vector Frequency Inverter
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Product Information
The Lenze EVF9328-EH is a 37 kW vector frequency inverter from the Lenze 9300 Vector series, engineered for high-performance open-loop and closed-loop AC motor control. Operating on a 3-phase AC input range of 320 V to 528 V AC (380 V to 480 V nominal), this heavy-duty drive provides a continuous rated output current of 75 A and a maximum short-term peak current of 112.5 A to handle demanding dynamic starting loads. The unit features an output frequency range of 0 Hz to 480 Hz with selectable switching frequencies from 2 kHz up to 16 kHz, allowing tuning between acoustic noise reduction and power stage derating. A key mechanical feature of the EVF9328-EH model is its push-through heatsink mounting design, designated by the -EH suffix, which passes through the control cabinet panel wall to route thermal energy directly outside the enclosure and protect interior control electronics.
For system control and field integration, the drive provides 6 configurable digital inputs, 4 digital outputs, 2 bipolar analog inputs, and 2 analog outputs, along with an integrated CAN system bus interface operating at up to 500 kbit/s. An Automation Interface (AIF) expansion slot allows modular integration of communication adapters, such as the PROFIBUS-DP module (EMF2133IB), DeviceNet, INTERBUS, or LECOM RS-232/485 cards. Commissioning a replacement unit requires configuring operational parameters, motor profiles, and network node settings using engineering tools like Lenze Global Drive Control (GDC), EASY Starter software, or an external XT Keypad (EMF2102IB). Replacement drives require parameter transfer before operation; parameter extraction from a faulty board or restoring parameter sets from backup files ensures proper fieldbus mapping and drive behavior prior to restart. ABC Industrial Parts can assist maintenance teams with pre-configured spare units and configuration file transfers to minimize startup delays.
Diagnostic information is accessible directly on the drive front panel via status LED indicators for DRIVE READY, TRIP / FAULT, and IMPULSE INHIBIT, as well as through detailed text messages on the XT Keypad LCD or GDC software fault history logs. System monitoring flags specific operational faults such as overcurrent (OC1, OC5), overvoltage (OU), undervoltage (LU), heatsink overtemperature (OH), or motor thermal overload (OH4). Initial troubleshooting should confirm stable 3-phase line voltage, clean heatsink cooling airflow, intact motor wiring, and proper fieldbus option card seating in the AIF slot. When the unit displays unrecoverable hardware fault codes like H05 or internal non-volatile EEPROM memory errors (EEr), internal board-level repairs are not field-serviceable. In these situations, acquiring a tested replacement or utilizing repair options through ABC Industrial Parts provides a reliable path back to full production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVF9328-EH |
| Model / Type | Vector Frequency Inverter |
| Product Family | 9300 Vector |
| Rated Power | 37 kW |
| Supply Voltage Range | 320 - 528 V AC (3-Phase) |
| Continuous Rated Current | 75 A |
| Maximum Peak Output Current | 112.5 A |
| Output Frequency Range | 0 - 480 Hz |
| Switching Frequency | 4 kHz (Adjustable 2 - 16 kHz) |
| Digital Inputs / Outputs | 6 Digital Inputs / 4 Digital Outputs |
| Analog Inputs / Outputs | 2 Bipolar Analog Inputs / 2 Analog Outputs |
| Integrated System Bus | CAN / CANopen (up to 500 kbit/s) |
| Mounting Type | Push-Through Heatsink (-EH) |
| Expansion Interface Slot | Automation Interface (AIF) |
Programming and Configuration
The Lenze EVF9328-EH vector drive is configured using standard software tools such as Lenze Global Drive Control (GDC) or EASY Starter. Parameter management allows commissioning engineers to program motor nameplate data, acceleration and deceleration ramps, dynamic vector control feedback parameters, and I/O terminal mapping. Operational settings are retained in non-volatile internal EEPROM memory, securing configurations against line power interruptions.
Direct local interaction is supported via the plug-in Lenze XT Keypad (EMF2102IB), which attaches directly to the drive interface slot. The XT Keypad features an LCD plain-text display and menu navigation keys to adjust parameters, monitor live operating data, and copy parameter sets between identical drives. When commissioning a replacement drive, parameter files saved in GDC can be transferred directly to the spare unit over the CAN bus connection or via a direct programming adapter.
Communication and System Integration
The EVF9328-EH includes a built-in CAN system bus interface operating at speeds up to 500 kbit/s. This integrated CAN/CANopen interface allows direct networking with other Lenze drives, remote I/O devices, or central controllers for high-speed reference distribution, motion synchronization, and remote parameter transfer.
To integrate into broader industrial fieldbus networks, the drive features a front-facing Automation Interface (AIF) expansion slot. This slot accepts modular option cards, including the Lenze PROFIBUS-DP module (EMF2133IB), as well as communication modules for DeviceNet, INTERBUS, and LECOM RS-232/485 networks. Onboard wired integration is further enabled by 6 digital inputs, 4 digital outputs, 2 bipolar analog inputs, and 2 analog outputs.
Diagnostics and Status Indication
Visual status indication on the EVF9328-EH is provided by three status LEDs located on the front panel. The green DRIVE READY LED flashes to indicate that line voltage is applied and the drive is ready, turning solid green during active motor operation. The yellow IMP / IMPULSE INHIBIT LED lights up solid when power stage pulse inhibit is active, confirming that the output power stage is disabled. The red TRIP / FAULT LED illuminates or blinks during active trip conditions to signal drive faults.
Detailed fault analysis is available through text messages on the connected XT Keypad LCD or via the fault history monitor within Global Drive Control (GDC) software. Diagnostic registers across the CAN system bus also report real-time operating metrics, thermal conditions, and trip history logs for remote control system monitoring.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRIVE READY | Green - Flashing / Solid | Flashing indicates mains voltage present and drive ready; solid green indicates drive in active operation. |
| TRIP / FAULT | Red - Solid / Flashing | Indicates an active TRIP fault condition. Blinking pattern or error code display pinpoints fault cause. Permanent state indicates internal hardware failure. |
| IMP / IMPULSE INHIBIT | Yellow - Solid | Power stage pulse inhibit active; output power stage disabled. |
Replacement and Spare Part Considerations
When selecting a replacement for a Lenze EVF9328-EH inverter, matching the exact part number and mechanical variant suffix is critical. The -EH designation indicates a push-through heatsink mounting layout requiring a cutout through the panel backplate. Substituting a standard internal panel-mount drive without the push-through configuration will alter thermal performance and enclosure mounting alignment.
During replacement, option cards installed in the Automation Interface (AIF) slot—such as the PROFIBUS-DP EMF2133IB card—must be transferred to the replacement unit. Ensure that hardware DIP switches or rotary address selectors on the option card match the original settings. After physical installation, parameter sets must be uploaded to the replacement inverter using Global Drive Control (GDC) software or an XT Keypad before enabling line power and motor operation.
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 | Instantaneous short-circuit overcurrent trip. | Short circuit in motor cable or motor winding; earth fault in output lines. | Check motor and wiring for short circuit or earth fault; check drive power module. |
| OC5 | Overload | Drive continuous overload threshold exceeded. | Excessive mechanical load; acceleration ramp too fast; motor under-dimensioned. | Reduce motor load; extend acceleration time; verify drive/motor rating. |
| OU | Overvoltage | DC bus voltage limit exceeded (>770 V DC). | Excessive regenerative energy during deceleration; deceleration ramp too short; defective or missing brake chopper/resistor. | Increase deceleration ramp time; install or inspect external brake resistor and chopper. |
| LU | Undervoltage | DC bus voltage fell below operating limit (<370 V DC). | Mains supply failure; phase loss; mains input voltage too low. | Check AC supply voltage, input fuses, and mains contactor. |
| OH | Heatsink Overtemperature | Drive heatsink temperature exceeded maximum threshold (>85°C). | Cooling fan defective; push-through heatsink blocked or dirty; cabinet ambient temperature too high. | Check and clean heatsink fins; verify cooling fan function; improve cabinet ventilation. |
| OH4 | Motor Overtemperature | Motor thermal contact / PTC trip. | Motor thermal overload; motor cooling fan failed; PTC sensor wiring fault. | Allow motor to cool; check motor loading; check PTC temperature sensor cable. |
| EEr | EEPROM Error | Non-volatile memory checksum error or write fault. | Parameter memory corrupted or internal EEPROM hardware defect. | Internal hardware fault — reload factory default settings; if fault persists, return unit for repair or replace unit. |
| H05 | Hardware Fault | Internal control board or power section hardware failure detected. | Control board component fault or internal power supply failure. | Internal board-level hardware fault — not field-serviceable; return unit for repair or replace unit. |
| CE0 | Communication Error AIF | Communication interruption between drive main board and AIF fieldbus module. | AIF module improper insertion; fieldbus cable fault; fieldbus master offline. | Check fieldbus wiring and master; re-seat AIF module in option slot. |
| Sd1 | Speed Feedback Failure | Feedback encoder signal fault. | Encoder cable disconnected or broken; encoder channel signal missing; encoder defective. | Check speed encoder connection and shield grounding; test encoder signal. |
| LP1 | Motor Phase Loss | Missing phase on motor output terminal. | Motor output cable disconnected; open contactor on motor line. | Check output wiring to motor and check motor contactors. |
Frequently Asked Questions
What does the -EH suffix mean on the Lenze EVF9328-EH drive?
The -EH suffix denotes a push-through heatsink mechanical design. The drive heatsink extends through a cutout in the rear panel of the enclosure, allowing heat to dissipate outside the control cabinet to keep internal panel temperatures lower.
What software is used to configure the EVF9328-EH inverter?
The drive is programmed using Lenze Global Drive Control (GDC) or EASY Starter software. Local parameter monitoring and manual adjustments can also be made using the plug-in Lenze XT Keypad (EMF2102IB).
Can I swap a failed EVF9328-EH unit with a spare without loading parameters?
No, a replacement drive requires configuration before operation. Motor parameters, control terminal settings, and network options must be loaded into the spare drive from a GDC software backup file or transferred using an XT Keypad.
Which fieldbus communication protocols are supported on this model?
The EVF9328-EH includes an integrated CAN system bus operating up to 500 kbit/s. Additional protocols like PROFIBUS-DP (via EMF2133IB module), DeviceNet, INTERBUS, and LECOM RS-232/485 are supported by installing option cards in the Automation Interface (AIF) slot.
What steps should I take if fault code H05 or EEr occurs?
Fault code EEr signals non-volatile memory corruption; you can attempt to reset the drive to factory defaults and reload parameter sets. Fault code H05 indicates an internal control board or power section failure that is not field-serviceable, requiring drive replacement or repair.
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