hold – controller on/off ( ) ź short press – acknowledge temperature setting ( ) AURATON 200 RTH temperature controller explained 4. Temporary temperature decrease mode programming indicator ( ) WIndicates the temporary temperature decrease mode planned by the user. Displayed when the mode is not executed but the function of the temporary temperature decrease is active (refer to "Temporary temperature decrease setting" section for more details). 5. Controller power on indicator ( ) Indicates the operating status. Appears when the controller device is started. 6. Transmission symbol ( ) Indicates communication with the receiver. 7. Battery exhausted ( ) Displayed when the battery voltage drops below the allowed limit. Replace the battery as soon as possible. Display screen 1. Temperature In normal operating mode, the controller displays the temperature of the room it is installed in.