EFC | Wilo
Your advantages

Your advantages

  • Quick and effective commissioning thanks to user-friendly operation assistant
  • High energy efficiency and compact design due to high efficiency of up to 98 per cent
  • Cost-effective solution due to low cooling requirements
  • Covers a wide range of pump applications using adjustable control modes
  • Flexible connectivity due to optional connection to various bus systems
Series description


Stand-alone frequency converter


  • This frequency converter for wall fixation can be installed in fixed speed pumps with asynchronous or permanent magnet motors for various applications, in particular for 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

Delivery state

  • 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)

Brochure (Documents)

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 (Documents)

REACH Regulation

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