Lenze EVV712-E AC DRIVE 3AC/PE 400V 14HP Frequency Inverter
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Product Information
The Lenze EVV712-E is a standard frequency inverter from the Lenze 710 / 712 Series designed for variable speed control of standard three-phase AC induction motors. Rated for 14 HP (10.3 kW) with a 3-phase 400 V AC supply at 50/60 Hz, this AC drive operates on an open-loop V/f control philosophy. It provides reliable motor speed regulation across an output voltage range of 0 to 400 V AC and an output frequency range of 0 to 400 Hz, making it suitable for material handling conveyors, industrial fans, and pump flow control systems.
Control connections are established using an integrated terminal strip featuring analog inputs accepting 0–10 V or 0–20 mA setpoint signals, alongside digital inputs for start/stop control, rotation direction, and preset speeds. Commissioning a replacement unit does not require proprietary software; settings are configured manually using physical potentiometers, DIP switches, or an optional plug-in operating keypad. When replacing a failed unit, matching these hardware adjustments ensures rapid re-commissioning without altering control panel wiring. ABC Industrial Parts can assist in sourcing fully tested units to minimize machine downtime during a replacement.
System status and operating states are indicated via front-panel status LEDs for MAINS, READY, and TRIP / FAULT, as well as an integrated fault relay contact for alarm signaling to higher-level controllers. Common trip conditions such as overcurrent (OC), overvoltage (OU), undervoltage (LU), overtemperature (OH), and motor overload (OL) can be identified quickly to guide field troubleshooting. If internal power component failures or board-level faults occur that cannot be resolved through external checks, swapping the drive with a tested replacement unit or utilizing repair services from ABC Industrial Parts offers the most reliable route back to production.
Technical Specifications
| Manufacturer | Lenze |
| Part Number | EVV712-E |
| Model / Type | AC DRIVE 3AC/PE 400V 14HP |
| Product Family | 710 / 712 Series |
| Component Type | Frequency Inverter |
| Supply Voltage | 400 V AC |
| Supply Phases | 3-Phase |
| Supply Frequency | 50/60 Hz |
| Rated Power (kW) | 10.3 kW |
| Rated Power (HP) | 14 HP |
| Output Voltage Range | 0 - 400 V AC |
| Output Frequency Range | 0 - 400 Hz |
| Control Method | V/f Control (Open-loop) |
Programming and Configuration
The Lenze EVV712-E frequency inverter uses straightforward hardware-based configuration methods that eliminate the need for specialized programming software or PC interface cables. Basic operational parameters, including minimum and maximum output frequencies, acceleration and deceleration ramp times, and motor current limits, are adjusted directly on the drive using local potentiometers and onboard DIP switches.
For installations requiring enhanced control or numerical monitoring, an optional operating keypad can be attached to access internal parameters and view drive diagnostic codes. When replacing an existing drive, maintenance technicians must copy the physical switch positions, potentiometer adjustments, or keypad parameter values from the original unit to guarantee identical drive performance upon power-up.
Diagnostics and Status Indication
Diagnostic monitoring on the Lenze EVV712-E relies on dedicated front-panel LED indicators that provide instant visual feedback regarding line power status, drive readiness, and active fault states. In addition, an integrated fault relay output provides a hardwired signal to external alarm horns or main system PLCs.
When a fault condition occurs, specific two-letter trip codes display on the keypad or status display, such as OC for Overcurrent, OU for Overvoltage, LU for Undervoltage, OH for Overtemperature, or OL for Motor Overload. These error codes allow maintenance personnel to rapidly isolate external line power issues, mechanical overloads, or thermal cooling restrictions.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| READY | Indicates drive is powered and ready for operation | |
| TRIP / FAULT | Indicates a fault or trip condition has occurred | |
| MAINS | Indicates main line power is active |
Replacement and Spare Part Considerations
When replacing a Lenze EVV712-E inverter, verifying electrical compatibility with the 3-phase 400 V AC supply and matching control signal ranges (0–10 V DC or 0–20 mA DC) is essential. Installing an identical spare unit preserves existing panel mounting and terminal strip wiring, avoiding the need for panel re-engineering or PLC code changes.
Prior to powering up a replacement unit, ensure all physical potentiometer and DIP switch settings match the configuration of the original drive. If retrofitting a legacy system to current drive hardware, modern replacements like the Lenze i550 cabinet inverter series can be considered, though direct replacement with an EVV712-E unit provides the fastest option for restoring plant operation.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| OC | Overcurrent | Output current exceeded peak safety limit. | Short circuit at output, motor overload, acceleration ramp too short. | Check motor wiring, inspect motor insulation, increase acceleration time. |
| OU | Overvoltage | DC bus voltage exceeded upper threshold. | Regenerative energy from motor during deceleration, deceleration ramp too short. | Extend deceleration time or connect braking resistor / chopper. |
| LU | Undervoltage | DC bus voltage fell below minimum operating threshold. | Mains supply phase failure, voltage drop on line, power interruption. | Check main input power voltage across all 3 phases. |
| OH | Overtemperature | Heatsink temperature exceeded thermal threshold. | Insufficient ventilation, cooling fan failure, ambient temperature too high. | Clean heat sink fins, check cooling fan operation, check panel ventilation. |
| OL | Motor Overload | Thermal motor protection (I2t) triggered. | Mechanical overload, continuous operation at high load and low speed. | Reduce motor load, verify current limit settings. |
Frequently Asked Questions
How is the Lenze EVV712-E frequency inverter configured?
The EVV712-E is configured manually using hardware potentiometers and DIP switches located on the drive, or via an optional plug-in operating keypad. It does not require specialized programming software or PC connection cables.
What analog control signals are accepted by the EVV712-E?
The terminal strip accepts standard analog setpoint signals of 0–10 V DC or 0–20 mA DC for open-loop motor speed adjustments.
What do the status LEDs on the EVV712-E front panel indicate?
The front panel includes three LEDs: MAINS indicates main power input, READY indicates the drive is energized and operational, and TRIP / FAULT indicates an active drive fault condition.
What causes an OC fault code on the Lenze EVV712-E?
An OC fault indicates output overcurrent. Common causes include motor output short circuits, insulation failure, excessive mechanical load, or an acceleration ramp set too short.
Can the EVV712-E be replaced directly without panel modifications?
Yes, replacing a failed unit with an exact EVV712-E spare maintains identical mechanical dimensions, mounting, and terminal strip wiring, eliminating the need for enclosure structural changes.
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Specific firmware and hardware versions
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Disclaimer:
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