Main Functions Si04-402A26 Function and Control1.10 Other Functions1.10.1 Hot Start FunctionHeat Pump OnlyIn order to prevent the cold air blast that normally comes when heating is started, thetemperature of the heat exchanger of the indoor unit is detected, and either the air flow isstopped or is made very weak thereby carrying out comfortable heating of the room.*The cold air blast is also prevented using a similar control when the defrosting operation isstarted or when the thermostat gets turned ON.1.10.2 Signal Receiving SignWhen the indoor unit receives a signal from the remote controller, the unit emits a signalreceiving sound.1.10.3 ON/OFF Button on Indoor UnitAn ON/OFF switch is provided on the front panel of the unit. Use this switch when the remotecontroller is missing or if its battery has run out.Every press of the switch changes from Operation to Stop or from Stop to Operation Push this button once to start operation. Push once again to stop it. This button is useful when the remote controller is missing. The operation mode refers to the following table. In the case of multi system operation, there are times when the unit does not activate withthis button.1.10.4 Titanium Apatite Photocatalytic Air-Purifying FilterThis filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic DeodorizingFilter in a single highly effective unit. The filter traps microscopic particles, decompose odoursand even deactivates bacteria and viruses. It lasts for three years without replacement ifwashed about once every six months.1.10.5 Mold Proof Air FilterThe air filter net is impregnated with a safe, odourless mould preventative to make the filtervirtually immune to mould.1.10.6 Self-Diagnosis Digital DisplayThe microcomputer continuously monitors main operating conditions of the indoor unit, outdoorunit and the entire system. When an abnormality occur, the LCD remote controller displays errorcode. These indications allow prompt maintenance operations.1.10.7 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.(Note) It takes 3 minutes to restart the operation because the 3-minutes standby function isactivated.(R3304)ON / OFF buttonMode Temperature setting Air flow rateCooling Only COOL 22ºC AUTOHeat Pump AUTO 25ºC AUTO
