Below we have answered frequently asked questions from our customers. If you do not find your answers here please contact your closest wholesaler or ESBE Sales company in your country.

What does the different LED- Signals in the front of the FSK101 represent?

The LED´s at the actuator located in the front of the FSK101 communicates working status and errors.

A constant LED light indicates working positions of the valve:

  • Green LED: the valve has an opening of 0%
  • Green Blue LED: the valve has an opening of 1 up to 40%
  • Blue LED: the valve has an opening of 40 up to 60%
  • Blue Red LED: the valve has an opening of 60 up to 99%
  • Red LED: the valve has an opening of 100%

What happens when one or more LED´s on the actuator is flashing rapidly?

Flashing in a frequency of 0,25s means ERROR. The error could mean that the valve does not react to the control signal and is stuck in one position. Following steps can be taken:

  • Reset: Disconnect / connect the power supply of the Fresh Hydro Unit. The valve moves during startup of the FSK101.
  • Cleaning: Dismount the valve from the FSK101. Clean the cone if necessary. During re-mounting of valve, use silicon grease.
  • Contact customer service.

For more detailed information, please see the installation manual.

What does the different LED- Signals on the controller fitted on the right hand side of the FSK101 represent?

  • Green LED: FSK is ready for use
  • Red LED: ERROR - please press the Service button for 2 seconds to get further information’s
  • Green LED is flashing: The FSK101 is used in manual mode. The primary pump is running with 50% speed, and the valve is in 50% position.
  • LED is flashing Green and Red: Legionella flushing is active

Is there an active lime protection integrated into the FSK101?

The Fresh Hydro Unit has an active lime protection. It works in two ways:

  • Hardware design: The construction of the plate heat exchanger allows a big energy transfer with low temperature level.
  • Software: The controller secures that whenever it is possible, the flow temperature in the primary side is limited below 60°C. (This depends of the drinking water flow and desired temperature).

How can I minimize the risk of lime in the Heat exchanger of the FSK101?

You get enlarged fallout of lime at temperatures above 60°C. To minimize the risk, set a tap temperature at a lower level (in every case lower than 55°C).

You also need to take in consideration that in case of high flow, as well as high temperature of drinking water, a temperature higher than 60°C has to be secured for the heating water.