3. Display and controls1 LED relay state (yellow)OFF The relay is releasedIlluminated The relay is picked up2 LED sensors (yellow)IlluminatedDisplays the sensor value belonging to the LED in thedigital displayflashes, 8 Er1 8 or 8 E E r2 8 Sensor error in the corresponding sensor circuitAll illuminatedDisplays the value of the warmest sensor in the digitaldisplay3 Digital display 3 digits (red)Display of sensor valueDisplay of error codes e.g. 8 Er9 84 Hindmost decimal point (red)OFF Display modeIlluminated Menu modeflashes Parameter mode5 LED error (red)OFF normal operationIlluminated with 8 Er1 8 , 8 E E r2 8, 8 Er8 8 or 8 Er9 9 8Sensor error, malfunction, invalid parameter6 Button Up / Down (display mode, normal operation)Press brieflyChange into the menu mode (see Operating instructionsPoint 8.4)Press for > 2sDisplays the stored MAX value (Up) / MIN value(Down) –press also button Set for ≥ 2s to erase the stored value7 Button Set / Reset (display mode, normal operation)Press briefly Displays the value of next sensor (sensor LED illuminates)Press for > 2s Reset, back to display modePress for > 10s Displays the software version (e.g. 000)8 LED RS485 Interface (yellow)Rx flashes briefly Unit is receiving data via the RS485 interfaceTx flashes briefly Unit is transmitting data via the RS485 interface