Lenze 13188646 ESMD251X2SFA SMD Frequency Inverter 0.25kW
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Product Information
The Lenze ESMD251X2SFA (part number 13188646) is a compact AC frequency inverter from the Lenze SMD series, engineered for precise motor speed regulation in light industrial automation systems. Operating on a single-phase or three-phase supply voltage ranging from 180 to 264 V AC, this 0.25 kW (0.33 HP) inverter delivers a continuous output current of 1.7 A with an output voltage range of 0 to 230 V AC. The unit features an integrated Class A EMC interference filter housed within an IP20 enclosure, reducing panel space requirements and eliminating the need for external filtering hardware. An integrated three-digit LED display keypad on the front fascia provides localized visual feedback and direct parameter access for linear or quadratic V/f control applications across an output frequency range of 0 to 240 Hz.
Control connections are made via screw terminals providing three programmable digital inputs, one configurable analog input supporting 0 to 10 V DC or 0/4 to 20 mA signals, and one programmable relay output. Commissioning a replacement unit is streamlined by the removable Electronic Programmable Module (EPM), a dedicated plug-in memory chip located on the drive. All parameter configurations, acceleration and deceleration ramps, and input/output assignments reside on this chip. Transferring the existing EPM module into a spare inverter copies the complete drive setup in seconds without requiring specialized software or external programming tools. Where parameter extraction from a damaged drive is required, ABC Industrial Parts can assist in recovering configuration data or programming a replacement EPM module prior to installation.
Diagnostic information is displayed on the front three-digit LED readout, which indicates operational state, output frequency, parameter values, and active error codes. Operational trips such as overvoltage (F01), undervoltage (F02), overcurrent (F03), or drive thermal overload (F04) can be evaluated immediately using the display. Initial field checks should focus on main power stability, motor wiring integrity, load conditions, and the seating of the EPM memory module. In the event of persistent internal hardware failures (F09) or parameter checksum errors (F12), control board defects cannot be serviced in the field, making a tested exchange unit or professional repair from ABC Industrial Parts the most reliable solution to restore production.
Technical Specifications
| Manufacturer | Lenze |
| Part number | 13188646 |
| Model / Type | ESMD251X2SFA |
| Product family | SMD |
| Component type | Frequency Inverter |
| Rated power | 0.25 kW (0.33 HP) |
| Supply voltage range | 180 - 264 V AC (1-phase or 3-phase) |
| Rated input current | 3.4 A |
| Continuous output current | 1.7 A |
| Output voltage range | 0 - 230 V AC |
| Output frequency range | 0 - 240 Hz |
| Switching frequency | 10 kHz |
| Control method | V/f Control |
| EMC filter | Integrated Class A |
| Protection rating | IP20 |
| Digital inputs | 3 |
| Analog inputs | 1 (0-10 V DC or 0/4-20 mA) |
| Relay outputs | 1 |
Programming and Configuration
The Lenze ESMD251X2SFA frequency inverter uses the Electronic Programmable Module (EPM) architecture for non-volatile configuration storage. All operating parameters—including V/f curve selection, switching frequency settings fixed at 10 kHz, acceleration time (parameter C02), deceleration time (parameter C03), and digital I/O functions—are saved directly onto the plug-in memory chip. Parameters can be programmed localized via the integrated three-digit LED display keypad on the drive's front panel.
For offline parameter management or rapid replication across multiple units, the Lenze EEPM1RA handheld programmer allows parameter sets to be read, edited, or cloned without supplying main power to the inverter. If an EPM error (F08) or data corruption occurs, resetting the drive to factory defaults or rewriting the module using the EEPM1RA programmer restores normal parameter execution.
Communication and System Integration
System integration is accomplished through control terminal blocks located on the front of the inverter. The unit provides three programmable digital inputs for start/stop control and operational commands, alongside one configurable analog input accepting either 0 to 10 V DC voltage signals or 0/4 to 20 mA current loops for precise speed setpoint modulation. A single programmable relay output provides remote operational state or fault feedback to supervisory PLC systems.
The drive operates on standard 180 to 264 V AC single-phase or three-phase supply lines with a rated input current of 3.4 A. With an output frequency range of 0 to 240 Hz and an integrated Class A EMC filter, the inverter limits high-frequency supply interference directly within the control cabinet. Its compact IP20 panel-mount design integrates smoothly into existing control enclosures for small material handling conveyors, packaging equipment, pumps, and blowers.
Diagnostics and Status Indication
The Lenze ESMD251X2SFA features a front-mounted three-digit LED display that serves as the central diagnostic interface. During normal operation, the keypad display indicates real-time output frequency, operational status, or selected parameter values. When a trip condition occurs, the inverter halts output and displays an alphanumeric fault code to identify the cause.
Real-time diagnostic tracking and parameter checks can be performed directly through the keypad or via the EEPM1RA handheld programmer. Diagnostic checking includes monitoring input power stability, verifying motor output current levels, and validating EPM memory communication.
Status LED Indicators
| LED | Color/Status | Meaning |
|---|---|---|
| 3-Digit LED Display | Red - Numeric / Alphanumeric | Displays operation status, output frequency, parameter values, or active fault codes |
Replacement and Spare Part Considerations
When replacing an installed Lenze ESMD251X2SFA (part number 13188646), verify that the replacement drive matches the 0.25 kW power rating and 180 to 264 V AC supply specification. Because parameter data is stored directly on the removable blue EPM chip, transferring the module from the original drive to the replacement unit restores all application settings, ramp profiles, and I/O parameters without requiring manual re-entry. Power must be completely isolated before removing or inserting the EPM chip to prevent corruption.
If replacing a drive due to internal board failure (such as fault code F09 or F12), verify that the EPM chip has not suffered physical or data damage prior to transfer. For systems planned for broader modernization, Lenze offers a migration path from the legacy SMD series to the Lenze i510 cabinet frequency inverter line, though direct replacement with an ESMD251X2SFA remains the fastest method to recover operation without panel re-engineering.
Error Codes & Fault Codes
The following error codes may be displayed during operation or diagnostics:
| Code | Name | Description | Possible Cause | Recommended Action |
|---|---|---|---|---|
| F01 | Overvoltage | DC bus voltage exceeded upper limit. | Mains supply voltage too high, or deceleration ramp time too short (excessive regenerative energy from motor). | Check mains input voltage; increase deceleration time (parameter C03); install braking module if required. |
| F02 | Undervoltage | DC bus voltage dropped below minimum threshold. | Mains voltage too low, brownout, or phase loss in supply line. | Check input power supply voltage and wiring connections. |
| F03 | Overcurrent | Output current exceeded peak allowable limit. | Short circuit or ground fault on motor output leads, acceleration ramp too short, heavy motor overload, or motor damaged. | Check motor and wiring for short circuits or earth faults; increase acceleration time (parameter C02); check motor size. |
| F04 | Drive Overload (i2t) | Inverter thermal overload limit reached. | Continuous operation at currents exceeding rated output current, carrier frequency set too high, ambient temperature too high. | Reduce load on motor; lower switching frequency; improve panel cooling. |
| F05 | Motor Overload (i2t) | Calculated motor thermal overload limit reached. | Motor operated at low speed under heavy load for extended period without external cooling. | Check motor current parameter settings; reduce load; allow motor to cool down. |
| F06 | Motor Overheating | Motor PTC thermistor trip detected. | Motor temperature sensor triggered overtemperature state. | Check motor ventilation and fan operation; reduce load; check PTC connections. |
| F07 | External Fault | Digital input configured as external fault (TRIP) was activated. | External monitoring signal (e.g. emergency off or external relay) triggered trip. | Check external fault signal loop and connected sensors. |
| F08 | EPM Error | Electronic Programmable Module (EPM) missing, corrupted, or unreadable. | EPM module not inserted properly, corrupted parameter data, or invalid EPM version. | Turn off power, re-seat EPM module; replace EPM module or re-program using EEPM1RA programmer. |
| F09 | Internal Hardware Fault | Control board internal monitoring detected hardware fault. | Internal component failure or control circuit defect. | Internal hardware fault — power cycle drive; if persistent, return unit for repair or replace inverter. |
| F10 | Communication Fault | Loss of internal or external control communication. | Serial communication link interrupted or timed out. | Check control connections and communication cable wiring. |
| F12 | Calibration / Parameter Fault | Internal parameter checksum failure or calibration error. | Internal hardware error or EEPROM data corruption. | Internal hardware fault — reset drive to factory default; if error remains, return unit for repair. |
| F-- | Password Lock / Parameter Copy Active | Display indicates parameter transfer or password access restriction. | Drive parameters protected by password or EPM copy operation in progress. | Wait for copy operation to complete or enter valid password. |
Frequently Asked Questions
How do I transfer parameter settings to a replacement Lenze ESMD251X2SFA drive?
Parameter settings are stored on the removable blue Electronic Programmable Module (EPM) chip on the front of the inverter. Turn off main power, remove the EPM chip from the original drive, insert it into the replacement ESMD251X2SFA drive, and restore power to complete parameter transfer.
Can the Lenze ESMD251X2SFA operate on both single-phase and three-phase supply power?
Yes, the ESMD251X2SFA inverter accepts both single-phase and three-phase AC input voltages between 180 V AC and 264 V AC.
What should I check if the drive displays error code F08?
Error code F08 indicates an EPM error. Turn off power to the drive, check that the blue EPM module is firmly seated in its slot, and restore power. If the fault persists, the parameter data on the module may be corrupted and require reprogramming using the EEPM1RA programmer.
Does the Lenze ESMD251X2SFA frequency inverter require an external EMC filter?
No, the ESMD251X2SFA includes an integrated Class A EMC interference filter, allowing it to conform to electromagnetic compatibility requirements without installing external line filters.
What steps are required if the inverter displays fault code F09 or F12?
Fault codes F09 (Internal Hardware Fault) and F12 (Calibration / Parameter Fault) indicate internal board or memory checksum failures. Cycle power to the unit. If the code remains on the 3-digit LED display, reset parameters to factory default or return the inverter for repair or exchange.
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Specific firmware and hardware versions
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