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Wilo-EFC | Wilo
Your advantages

Your advantages

  • Flexible and safe application as a stand-alone frequency converter for fixed speed pumps
  • Compact design with energy-saving cooling concept to reduce temperature losses
  • Integrated energy-efficient harmonic reduction and additional energy-saving function in the partial load range of the pump
  • Versatile use in pump applications thanks to several connection options and different control modes
  • Easy commissioning thanks to intuitive assistant with graphical user interface
Series description


Stand-alone frequency converter


  • This wall-mounted frequency converter can fit with fixed speed pumps equipped with Asynchronous or Permanent Magnet motors, in several applications, especially heating, air conditioning and pressure boosting.

Technical data

  • Full motor protection with thermistor evaluation
  • Emergency operation with speed reduction in the event of excess temperature, undervoltage or malfunction of a mains phase
  • Phase failure monitoring for main phase
  • Real-time clock for time-based control
  • Dedicated counter for inverter and motor operating hours, kWh counter, memory for standard messages
  • Trend function (installed electronics to operate the data log)
  • Standard cascade control, protects pump from running dry, no or low volume flow
  • Energy-saving mode with standby mode function
  • 4 internal PID controllers
  • Smart Logic function with 10 measures for simple drive activities
  • PM motor and synchronous reluctance motors can be operated using a device

Scope of delivery

  • Stand-alone frequency converter
  • Installation and operating instructions




Installation and operating instructions


Article Number MG21L102
Edition 10/2017
Page format 209.9 x 297.0 mm
Number of pages 91
PDF (4 MB)


Article Number MG21M102
Edition 10/2017
Page format 209.9 x 297.0 mm
Number of pages 85
PDF (6 MB)

Certification booklet


Article Number 2220752
Edition 2021-12
Page format 209.9 x 297.0 mm
Number of pages 16
PDF (4 MB)


Product information Wilo-EFC. Powerful, flexible, cost-efficient.

Page format 209.9 x 297.0 mm
Number of pages 8
PDF (8 MB)

Certificate REACH

REACH Regulation

Edition 2021-05
Page format 209.9 x 297.0 mm
Number of pages 4
PDF (212 KB)