SiBE04-809 Main Functions
Function and Control 25
1.11 Other Functions
1.11.1 Hot-start Function
Heat Pump Only
In order to prevent the cold air blast that normally comes when heating is started, the
temperature of the heat exchanger of the indoor unit is detected, and either the airflow is
stopped 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 is
started or when the thermostat gets turned ON.
1.11.2 Signal Receiving Sign
When the indoor unit receives a signal from the remote controller, the unit emits a signal
receiving sound.
1.11.3 ON/OFF Button on Indoor Unit
An ON/OFF switch is provided on the front panel of the unit. Use this switch when the remote
controller 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 with
this button.
Note: When the ON/OFF button is pressed for 10 sec. or more, the operation will be stopped.
See page 44 for the detail of "Forced Operation Mode".
1.11.4 Titanium Apatite Photocatalytic Air-Purifying Filter
This filter combines the Air Purifying Filter and Titanium Apatite Photocatalytic Deodorizing
Filter in a single highly effective unit. The filter traps microscopic particles, decompose odours
and even deactivates bacteria and viruses. It lasts for three years without replacement if
washed about once every six months.
1.11.5 Air Filter (Pre-filter)
The filter net is treated with mold resisting agent TBZ (harmless, colorless, and odorless). Due
to this treatment, the amount of mold growth is much smaller than that of normal filters.
1.11.6 Self-Diagnosis Digital Display
The microcomputer continuously monitors main operating conditions of the indoor unit, outdoor
unit and the entire system. When an abnormality occur, the LCD remote controller displays error
code. These indications allow prompt maintenance operation.
(R3304)
ON / OFF button
Mode Temperature setting Airflow rate
Heat Pump AUTO 25ºC AUTO
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