24Thermostat constantly monitors the operation of connected sensors. If it detects any failure then following error codes can be displayed.8. Error codesError code ERROR DESCRIPTION TROUBLESHOOTINGErr02 The maximum / minimum floortemperature has been exceeded • Set the heating / cooling medium temperature or change D14 / D15 parameter.Err03 Floor sensor is faulty • If floor sensor is connected to S1/S2 input, check the wiring.• If floor sensor is not connected, check the D03/D04 parameters settings.Err04 Floor sensor is shorted • Check floor sensor wire insulation for any damages. Sensor resistance for 25°C=10kΩ.View of the display when theexternal sensor has been selectedas air temperature measurement(installer parameters D03 = 1 andD04 = 0), but it is broken or notconnected.Display view when an externalsensor has been selected as a floorsensor (installer parameters D03 = 1and D04 = 0). Applies to error codes- Err02, Err03 and Err04. Check thetable below for a solution.Number of errors Error code