Functions SiBE01-82922 Functions and Control1.8 Other Functions1.8.1 Hot Start FunctionIn order to prevent the cold draft that normally comes when heating operation starts, thetemperature of the indoor heat exchanger is detected, and either the airflow is stopped or ismade very weak thereby carrying out comfortable heating of the room.*The cold draft is also prevented using a similar control when the thermostat turns OFF.1.8.2 Signal Receiving SignWhen the indoor unit receives a signal from the remote controller, the unit emits a signalreceiving sound.1.8.3 ON/OFF Button on Indoor UnitAn ON/OFF button is provided on the front panel of the unit. Use this button when the remotecontroller is missing or if its battery has run out. Push this switch once to start operation. Push once again to stop it. The operation mode refers to the following table.1.8.4 Air-Purifying FilterThe Air purifying filter with bacteriostatic, virustatic functions can be renewed by washing it withwater once every 6 months. We recommend replacing it once every 3 years.1.8.5 Air FilterThe filter net is treated with mold resisting agent TBZ (harmless, colorless, and odorless). Dueto this treatment, the amount of mold growth is much smaller than that of normal filters.1.8.6 Self-Diagnosis Digital DisplayThe microcomputer continuously monitors operating conditions of the indoor unit, the outdoorunit, and the entire system. When an abnormality occurs, the remote controller displays errorcode on the LCD. These indications allow prompt maintenance operations.1.8.7 Auto-restart FunctionEven if a power failure (including one for just a moment) occurs during the operation, theoperation restarts in the condition before power failure automatically when power is restored.ON/OFF ON/OFF button(R8512)Mode Temperature setting Airflow rateAUTO 25°C AUTO