Lenze EVF9331-EV 9300 Vector Frequency Inverter 55kW
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Product Information
The Lenze EVF9331-EV is a 55 kW vector frequency inverter from the 9300 Vector series, engineered for high-power closed-loop and open-loop speed and torque motor control. Operating on a nominal 3-phase 400 V AC supply across an allowable line voltage range of 320 V AC to 528 V AC, this drive supplies a continuous output current of 110 A with an output frequency range from 0 to 480 Hz at an 8 kHz switching frequency. Motor control features support vector algorithms with or without speed feedback—accommodating resolvers alongside TTL, HTL, or SinCos incremental encoders—as well as standard V/f characteristic profiles. As an EV model variant, the drive is constructed without an internal RFI line filter, requiring an external mains filter such as the Lenze EZF series when radio frequency interference suppression is needed.
Connecting and commissioning a replacement unit involves interfacing with the onboard control terminals, which comprise 6 digital inputs, 4 digital outputs, 2 analog inputs (-10 V to +10 V), and 2 analog outputs (-10 V to +10 V). Multi-axis drive coordination and peer-to-peer system bus networking are supported through an integrated CANbus interface at terminal X4, operating at speeds up to 500 kbit/s. An Automation Interface (AIF) slot accepts optional plug-in fieldbus modules, such as the EMF2133IB PROFIBUS-DP adapter. Commissioning a spare drive requires restoring configuration parameters, as the unit stores up to four switchable parameter sets in non-volatile internal EEPROM. Parameters can be copied using the optional Lenze 9371BB Keypad XT or via Lenze Global Drive Control (GDC) software using an EMF2173IB or EMF2177IB PC system bus adapter. ABC Industrial Parts can assist in extracting or verifying stored configuration parameter sets to ensure the replacement drive matches original machine requirements.
System status and fault monitoring are managed through onboard LEDs and internal diagnostic parameters. Active trip codes are displayed in parameter C0161, while parameters C0168 through C0171 record a historical log of fault events. The visual status interface features a green DRIVE READY / RUN LED, which shines solid when the drive is enabled or flashes when running/inhibited, and a red TRIP LED that indicates an active fault state. First-line troubleshooting involves checking mains supply fuses and wiring at input terminal X1 during undervoltage (LU) or phase failure (LP) trips, inspecting DC bus levels on overvoltage (OU), and testing motor windings for ground faults (OC1) or short circuits (OC2). Severe internal control board errors such as EEPROM corruption (EER), internal microprocessor program faults (PR0), or hardware component failure (H05) are not field-serviceable; in these instances, replacing the drive or installing a tested exchange unit from ABC Industrial Parts offers the fastest route to restoring production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVF9331-EV |
| Model / Type | 9300 Vector Frequency Inverter |
| Product Family | 9300 Vector |
| Rated Power | 55 kW |
| Nominal Supply Voltage | 400 V AC |
| Supply Voltage Range | 320 - 528 V AC |
| Continuous Output Current | 110 A |
| Output Voltage Range | 0 - 400 V AC |
| Output Frequency Range | 0 - 480 Hz |
| Switching Frequency | 8 kHz |
| Control Method | Vector control (open/closed loop), V/f characteristic control |
| Digital I/O | 6 Digital Inputs / 4 Digital Outputs |
| Analog I/O | 2 Analog Inputs (-10 V to +10 V) / 2 Analog Outputs (-10 V to +10 V) |
| Internal RFI Filter | Without internal filter (EV variant) |
Programming and Configuration
Parameter setup and drive configuration for the Lenze EVF9331-EV are conducted using either the plug-in Lenze 9371BB Operating Module (Keypad XT) or the Lenze Global Drive Control (GDC) software package. Drive internal memory contains four non-volatile EEPROM parameter sets that can be selected or switched to support different production recipes or operating profiles without re-commissioning.
To transfer parameters from an existing unit to a spare drive, users can clone the dataset into the 9371BB keypad memory and upload it to the replacement unit. Alternatively, connecting a PC running GDC software via an EMF2173IB or EMF2177IB PC System Bus Adapter allows direct parameter uploading, editing, and backup storage. If clearing parameters to factory settings is necessary during commissioning, executing parameter command C0002=1 restores default values.
Communication and System Integration
System connectivity on the Lenze EVF9331-EV includes an integrated CANbus system bus accessed at terminal block X4. Supporting data transfer rates up to 500 kbit/s, this interface enables peer-to-peer drive coordination, high-speed multi-axis synchronization, and direct connection to industrial motion controllers.
For higher-level factory fieldbus integration, the unit contains a dedicated Automation Interface (AIF) slot. This slot accommodates optional fieldbus communication modules, including the EMF2133IB PROFIBUS-DP card, as well as optional modules for DeviceNet, INTERBUS, and serial LECOM communications.
Diagnostics and Status Indication
The EVF9331-EV incorporates continuous self-diagnostics displayed on its front status panel LEDs and readable via parameter registers. Parameter C0161 displays the active fault or error code during a trip event, while parameters C0168 through C0171 store a sequential fault history log for root-cause troubleshooting.
When connected, the 9371BB Keypad XT or GDC software diagnostic window provides clear text descriptions of trip conditions, operating status, and real-time electrical metrics.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| Red LED (TRIP) | Red - Solid or Flashing | Active fault code or trip state; unit disabled due to active fault |
| Green LED (DRIVE READY / RUN) | Green - Solid or Flashing | Solid indicates drive enabled and ready; flashing indicates drive inhibited or running |
Replacement and Spare Part Considerations
When sourcing a replacement unit for an installed Lenze EVF9331-EV, verify the full part number and variant suffix. The EV extension specifies that the inverter was manufactured without an internal RFI line filter. Installing a replacement unit into a panel that relies on an external line filter (such as the Lenze EZF series) ensures compliance with existing EMC setups.
A replacement EVF9331-EV is not plug-and-run out of the box. Before connecting the drive to the motor, the exact parameter configuration—including motor data, ramp times, I/O mapping, and fieldbus node addresses—must be loaded into internal EEPROM. Transferring parameters via the 9371BB Keypad XT or GDC software prevents incorrect motor rotation or control trips upon initial power-up.
Ensure that any plug-in AIF modules (such as PROFIBUS-DP EMF2133IB) or encoder feedback cards installed on the original drive are transferred to the replacement unit. Inspect terminal connections on terminal blocks X1 and X4 to verify wiring integrity.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC1 | Earth Fault | Short circuit to frame / ground detected at inverter output terminals | Motor cable damaged, motor insulation breakdown, ground fault in motor winding | Check motor cable and motor insulation resistance. Disconnect motor and re-test drive. |
| OC2 | Short Circuit | Output current exceeded maximum allowable limit | Inter-phase short circuit on output, rapid acceleration with high inertia, incorrect motor parameters | Check motor wiring for inter-phase short circuits. Increase acceleration ramp time. Check motor parameter settings. |
| OC3 | Overcurrent During Acceleration | Motor current exceeded peak limit during acceleration phase | Acceleration time too short, mechanical stall/jam, V/f boost set too high | Increase acceleration time (C0012), check mechanical system for jamming. |
| OC5 | I*t Overload | Continuous current overload exceeded 150% threshold limit | Drive undersized for load, sustained heavy mechanical overload | Check motor load and operating conditions. Verify drive power sizing. |
| OU | Overvoltage DC Bus | DC bus voltage exceeded upper limit (>770 V DC) | Regenerative energy during deceleration too high, deceleration ramp time too short, braking chopper or resistor defective/missing | Extend deceleration time (C0013), fit or inspect external braking resistor and braking module. |
| LU | Undervoltage DC Bus | DC bus voltage dropped below minimum operating limit (<370 V DC) | Mains supply failure, main voltage dip, blown input fuse, phase loss | Check mains input line voltage, fuses, and incoming power supply stability. |
| OH | Heatsink Overtemperature | Heatsink temperature exceeded safety limit (>85 °C / 90 °C) | Fan clogged or defective, ambient air flow restricted, excessive ambient temperature, drive overloaded | Clean heatsink cooling fins, verify cooling fan functionality, improve cabinet ventilation. |
| OH4 | Internal Drive Temperature High | Internal control board ambient temperature exceeded threshold | Enclosure internal temperature too high, fan failure | Improve panel cooling, inspect internal enclosure ventilation. |
| OH7 | Motor PTC Tripped | Motor PTC sensor connected to terminals T1/T2 registered overtemperature | Motor thermal overload, insufficient motor cooling/ventilation, fan blocked | Allow motor to cool down, check motor load and forced ventilation fan. |
| OH8 | Motor I2t Thermal Overload | Calculated motor thermal load exceeded limit | Sustained motor low-speed operation under heavy load, incorrect I2t parameter settings | Check motor operating speed and duty cycle, verify motor load and C0075/C0076 parameter settings. |
| LP | Phase Failure | Loss of an incoming mains phase detected | Blown input line fuse, loose wiring on input terminal block X1 | Check mains wiring, input line voltages, and fuses. |
| CE0 | Automation Interface Communication Error | Communication fault between drive power unit and AIF fieldbus module | AIF module loose, bad contact, or module malfunction | Re-seat communication module in AIF slot; inspect fieldbus cable connection. |
| EER | EEPROM Memory Error | Internal EEPROM checksum error or parameter read error | EEPROM chip fault or corrupted data during power-down | Internal hardware fault — execute factory default reset (C0002=1). If error persists, unit requires repair or replacement. |
| H05 | Internal Hardware Error | Internal hardware control board self-test failure | Internal component or power board failure | Internal board failure — unit is not field-serviceable. Return drive for repair or replace unit. |
| PR0 | Program Error | Internal microprocessor system fault or program memory corruption | Internal memory error or firmware malfunction | Internal processor error — cycle 24V power. If fault persists, replace or return drive for factory service. |
Frequently Asked Questions
Does the Lenze EVF9331-EV frequency inverter include an internal mains filter?
No. The EV suffix indicates that this model variant is constructed without an internal RFI line filter. If EMC compliance is required in your installation, an external filter such as the Lenze EZF series must be installed in the mains line.
How do I clone parameter settings to a spare EVF9331-EV inverter?
Parameters stored in the drive's internal EEPROM can be cloned by transferring them into a Lenze 9371BB Keypad XT module and uploading them to the spare unit. Alternatively, you can use Lenze Global Drive Control (GDC) software via an EMF2173IB or EMF2177IB PC System Bus Adapter to upload and save parameter sets.
What fieldbus networks are supported on the EVF9331-EV?
The drive includes an integrated CANbus interface via terminal X4 (up to 500 kbit/s). Additional fieldbus interfaces—such as PROFIBUS-DP (EMF2133IB), DeviceNet, INTERBUS, and LECOM—are supported by installing optional communication modules into the Automation Interface (AIF) slot.
What does a fault code EER or H05 mean on the drive?
Code EER indicates an EEPROM memory fault, while code H05 indicates an internal hardware self-test error. If executing a parameter reset (C0002=1) or cycling 24V power does not clear these errors, the fault is internal to the hardware and requires professional repair or component replacement.
Which motor feedback devices can be connected to the drive?
The EVF9331-EV feedback interface supports resolvers as well as incremental encoders, including TTL, HTL, and SinCos encoder types.
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