SiEN12-710A Main FunctionsFunction and Control 371.12 Other Functions1.12.1 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.1.12.2 Signal Receiving SignWhen the indoor unit receives a signal from the remote control, the unit emits a signal receivingsound.1.12.3 ON/OFF Button on Indoor UnitAn ON/OFF button is provided on the front panel of the unit. Use this button when the remotecontrol is missing or if its battery has run out.Every press of the button switches from ON to OFF or from OFF to ON.For FTKS25/35D, FTXS25/35E" Push this button once to start operation. Push once again to stop it." This button is useful when the remote control 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.Forced operation mode will be set by pressing the ON/OFF button for between 5 to 9 sec. whilethe unit is not operating.Note: When the ON/OFF button is pressed for 10 sec. or more, the operation will be stopped.See page 57 for the detail of "Forced Operation Mode".1.12.4 Titanium Apatite Photocatalytic Air-Purifying FilterFor FTKS25/35D, FTXS25/35EThis 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.1.12.5 Mold Proof Air Filter (Prefilter)For all indoor unitsThe 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.(R4269)ON/OFF ON/OFF buttonMode Temperature setting Air flow rateCooling Only COOL 22∞C AUTOHeat Pump AUTO 25∞C AUTO
