Lenze EVF9323-EV 9300 Vector Frequency Inverter 1.5 kW
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Product Information
The Lenze EVF9323-EV is a 1.5 kW vector-controlled frequency inverter belonging to the 9300 Vector series. Designed to deliver precise speed and torque control for dynamic standard 3-phase AC induction motors and synchronous motors, it provides motor control across a mains supply voltage range of 320 V AC to 528 V AC at 45 to 65 Hz. This unit delivers a rated output current of 3.9 A at 400 V and 3.3 A at 480 V, generating an output frequency range of 0 to 480 Hz with a default switching frequency of 8 kHz that can be adjusted up to 16 kHz. As an EV designation model, this inverter is constructed without an internal RFI filter, enabling cabinet builders to implement customized external filtering arrangements.
Integrating the EVF9323-EV into an automated line is flexible due to its onboard control interfaces and modular expansion options. The main board includes six digital inputs, four digital outputs, two analog inputs, and two analog outputs, alongside a built-in CAN System Bus operating up to 500 kbit/s for drive-to-drive cross-linking. An integrated Automation Interface slot accepts plug-in fieldbus modules including PROFIBUS-DP, CANopen, INTERBUS, and LECOM RS-232/485, or the EMZ9371BC operating keypad. Commissioning a replacement unit requires copying parameter profiles to match the existing application. Four switchable parameter sets are maintained in non-volatile EEPROM and can be loaded via the keypad or Lenze Global Drive Control software. When restoring drive configurations, support from ABC Industrial Parts can assist in securing a pre-configured or fully tested donor drive.
System status and fault conditions are signaled through front panel LEDs and dedicated diagnostic contacts. Green, red, and yellow status LEDs display drive readiness, trip warnings, and pulse inhibit status, while terminals 28, K11, K12, and K14 provide TRIP relay output signals. In the event of motor shorts, ground faults, or control hardware failures, the internal fault buffer logs trip events under parameter code C0168. First-line field checks should cover mains line fuses, motor cable insulation, and sensor connections at terminals T1 and T2. Power stage failure or internal microcontroller corruption cannot be resolved in the field; installing a tested exchange unit from ABC Industrial Parts offers a direct solution to minimize production downtime.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVF9323-EV |
| Model / Type | 9300 Vector Frequency Inverter 1.5 kW |
| Product Family | 9300 Vector |
| Component Type | Frequency Inverter |
| Rated Power | 1.5 kW |
| Supply Voltage Range | 320 V AC - 528 V AC |
| Mains Frequency | 45 Hz - 65 Hz |
| Rated Output Current (400V) | 3.9 A |
| Rated Output Current (480V) | 3.3 A |
| Output Frequency Range | 0 Hz - 480 Hz |
| Default Switching Frequency | 8 kHz (adjustable up to 16 kHz) |
| Control Method | Vector Control / V/f Characteristic Control |
| Digital Inputs | 6 |
| Digital Outputs | 4 |
| Analog Inputs | 2 |
| Analog Outputs | 2 |
| Integrated RFI Filter | Without interference filter (EV model) |
Programming and Configuration
The Lenze EVF9323-EV operates using flexible vector control algorithms that support both sensorless vector control and closed-loop speed feedback via encoders or resolvers. Setting up the inverter can be accomplished using the optional plug-in EMZ9371BC operating keypad or through PC-based software using Lenze Global Drive Control (GDC). Configuration variables encompass motor nameplate data, acceleration and deceleration ramps, switching frequencies, and custom I/O mapping.
Internal non-volatile EEPROM memory stores up to four independent parameter sets. These switchable parameter sets allow machines operating multiple recipes or operating modes to reconfigure drive behavior instantly without transferring new files. During maintenance or drive replacement, parameter sets can be uploaded from the drive into the EMZ9371BC keypad or saved directly using GDC software, permitting rapid parameter extraction from a donor unit and downloading into the replacement drive.
Communication and System Integration
Networking capabilities on the Lenze 9300 Vector series include a built-in CAN System Bus interface. Supporting transmission speeds up to 500 kbit/s, this onboard CAN connection facilitates high-speed drive-to-drive communication, parameter transfer, and synchronized axis motion without requiring secondary interface cards.
For integration into broader industrial networks, the drive features a flexible Automation Interface (AIF) slot. This modular connection accepts fieldbus communication modules including the EMF2133IB or EMF2131IB PROFIBUS-DP modules, the EMF2175IB CANopen module, and the EMF2102IB LECOM RS-232/485 module, as well as INTERBUS options. The active protocol is governed by the installed AIF module, simplifying retrofit into existing plant architectures.
Diagnostics and Status Indication
Real-time operational monitoring on the EVF9323-EV is provided by front-mounted LEDs and internal diagnostic parameter registers. The DRIVE READY green LED indicates system initialization and normal operating status, while the red TRIP LED alerts operators to active fault conditions or impending warnings. A yellow IMP LED signals when pulse inhibit is active and the inverter output stage is disabled.
Detailed fault analysis is accessible through the EMZ9371BC keypad or GDC software diagnostic screens. Parameter code C0168 logs fault history and trip codes, detailing root causes such as overcurrent, overvoltage, ground faults, or communication timeouts. Hardware trip contacts on terminals 28, K11, K12, and K14 allow external PLC monitoring to immediately halt system sequencing upon drive failure.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| DRIVE READY | Green - Solid / Blinking | On: Drive operational / ready. Blinking: Drive inhibited or in special operating state. |
| TRIP | Red - Solid / Blinking | On: Active trip condition / fault present. Blinking: Warning present. |
| IMP | Yellow - Solid | Pulse inhibit active (power stage blocked / output disabled). |
Replacement and Spare Part Considerations
When replacing a Lenze EVF9323-EV inverter, matching the exact part number and model suffix is critical. The EV designation indicates that no internal RFI filter is installed in this unit. Installing a standard filtered unit in a panel optimized for an EV model or replacing an EV drive without ensuring external filter placement can alter cabinet electromagnetic compliance.
Before taking a failed unit out of service, attempt to back up parameter settings via Global Drive Control or transfer the active parameter set into an EMZ9371BC keypad. Ensure that installed option cards, such as PROFIBUS or CANopen AIF modules, are moved to the replacement drive and that termination resistors and DIP switch settings are configured to match the original layout.
If the existing drive displays unrecoverable faults like H05 or EER, or trips immediately on OC1 without a connected motor, internal power electronics or microcontrollers have suffered hardware damage. Replacing the complete inverter unit restores full operational reliability and eliminates prolonged diagnostic delays.
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 / Overcurrent | Short circuit at output or severe overcurrent condition. | Short circuit in motor cable, motor interturn short circuit, acceleration ramp time too short. | Check motor and wiring for short circuit / ground fault, check parameter settings and acceleration time. If fault occurs immediately without connected motor, internal power module (IGBT) failure—return unit for repair. |
| OC2 | Earth fault | Ground fault detected in motor phases or motor cable. | Ground fault in motor lead or motor winding, capacitive cable charging current excessive. | Check insulation resistance of motor and cable to ground. If insulation is good, internal current sensor fault—return unit for repair. |
| OC5 | I2t motor overload | Calculated motor load integral exceeds threshold (I2t overload trip). | Continuous motor overload, incorrect motor rated current parameter setting. | Reduce mechanical load, check motor current configuration in C0087 / C0088. |
| OU | Overvoltage DC bus | DC bus voltage exceeds upper limit. | Regenerative energy from deceleration ramp too high, line supply voltage too high, brake chopper failure. | Extend deceleration time, connect brake resistor, verify mains input voltage. |
| LU | Undervoltage DC bus | DC bus voltage dropped below minimum threshold. | Mains supply failure, supply voltage drop, phase loss on input. | Check input mains voltage, check mains fuses and supply contactor. |
| OH | Heatsink overtemperature | Power section heatsink temperature exceeded maximum allowable limit. | Insufficient cooling airflow, ambient temperature too high, fan failure, dirty heatsink fins. | Clean heatsink, ensure adequate cabinet ventilation, verify fan operation. |
| OH4 | Drive internal thermal overload | Thermal overload threshold reached in inverter power section. | High continuous output current at high switching frequency. | Reduce load or lower switching frequency setting. |
| OH7 | Motor PTC / TK temperature fault | Motor thermal contact or PTC thermistor trip detected at terminals T1, T2. | Motor overheating, broken thermistor wire, PTC sensor triggered. | Allow motor to cool down, check motor cooling and thermistor wiring. |
| OH8 | Motor KTY temperature sensor fault | Motor temperature measured by KTY sensor exceeds set limit. | Motor overheated or KTY sensor broken/shorted. | Check motor thermal condition and KTY sensor connections. |
| NMAX | Maximum speed exceeded | Motor actual speed exceeded maximum limit (NMAX). | Inertia feedback loop instability, field weakening setting fault, external torque driving motor. | Check speed controller tuning parameters, check encoder feedback line. |
| CE0 | AIF communication fault | Communication failure between inverter mainboard and module in AIF slot. | Fieldbus communication timeout or bad connection at AIF interface. | Check fieldbus cable, bus master state, and seating of AIF communication module. |
| CE1 | CAN System Bus fault 1 | CAN system bus communication error on CAN-In object. | CAN line break, incorrect baud rate, missing termination resistor. | Check CAN bus wiring, 120 ohm terminating resistors, and CAN baud rate configuration. |
| EER | EEPROM fault | Checksum or read/write failure in internal non-volatile EEPROM memory. | Corrupted parameter memory due to power interruption during write or EEPROM chip failure. | Load factory defaults (C0002 = 1). If fault persists, internal control board hardware fault—replace unit. |
| H05 | Internal hardware fault | Internal control hardware initialization error. | Board-level micro-controller or circuit failure. | Internal hardware fault — non-serviceable in field, return unit for repair or replace inverter. |
| LP1 | Mains phase failure | Input line phase failure detected. | One input mains phase lost or high ripple voltage in DC bus. | Check 3-phase AC line voltage and input fuses. |
| Pr0 | Program error | System software fault / runtime exception. | Firmware corrupt or execution fault. | Cycle line power. If error persists, replace control board or drive. |
| P01 | Parameter set fault | Active parameter set invalid or incomplete. | Incomplete transfer of parameter set. | Re-download parameter set using GDC or load factory defaults. |
| Sd2 | Resolver / Encoder tracking fault | Signal loss or line break detected on resolver / speed feedback encoder. | Broken encoder cable, loose connector, defective encoder. | Check encoder wiring and shield connections, verify encoder supply voltage. |
Frequently Asked Questions
What does the EV designation mean on the Lenze EVF9323-EV?
The EV designation specifies that the inverter is manufactured without an integrated internal RFI interference filter, allowing control cabinet installations to utilize external filter components tailored to specific EMC requirements.
Which software is required to configure the Lenze EVF9323-EV?
The drive is configured using Lenze Global Drive Control (GDC) software via a PC connection, or manually through the plug-in EMZ9371BC operating keypad.
How are parameter sets transferred when replacing a unit?
Parameter sets stored in the non-volatile EEPROM can be saved to a PC using GDC software or uploaded into an EMZ9371BC keypad. The parameters can then be downloaded directly into the replacement inverter.
What should I check if the drive displays an OC1 fault?
Check the motor and wiring for short circuits or ground faults, and verify acceleration ramp settings. If the OC1 fault triggers instantly with no motor connected, the internal IGBT power module has failed and the unit must be repaired or replaced.
Which fieldbus protocols are supported by the EVF9323-EV?
The drive includes an onboard CAN System Bus and an Automation Interface (AIF) slot that supports plug-in modules for PROFIBUS-DP (EMF2133IB/EMF2131IB), CANopen (EMF2175IB), LECOM RS-232/485 (EMF2102IB), and INTERBUS.
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