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Fedders R407C User Manual

Page 55

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F8

If the room temperature >=31

°

C, compressor off, outdoor fan off and 4-way valve remains

on, indoor fan runs according to following table:

ID Room Temp., Tr

Tr<=31

°

C

31

°

C

°

C

Tr>=32

°

C

ID Fan

SET

*

LOW

*

Maintain current state


The heating cycle starts and stops according to the result of set temperature - room
temperature comparison:

ID Room Temp.

< Set pt-1°C = Set pt-1°C = Set pt.

=Set pt+1°C > Set pt+1°C

Heat Mode Cycle

Start

Start

*

Stop

Stop

*

Maintain current state


The 4-way valve will always be on in this mode except during de-icing, while the indoor fan
will be turned on or off in accordance to cool air prevention requirement.

4.

Auto Mode


Depending on the room temperature, the air-con controller will automatically select cool, dry
or heat mode when this mode is first selected. The selected mode of operation will not be
exited until Auto mode is de-selected. If automatic operation is chosen, auto mode will be
automatically selected.

Room Temperature Range

Mode of Operation That Will Be Entered if Auto Mode

Is Selected

Room Temp. >24ºC

Cool Mode

19 ºC

<

Room Temp.

24ºC

Dry Mode

Room Temp.

19ºC

Heat Mode (Heat Pump Unit only)

Mode selection rule in Auto mode


The set temperature is internally set at 22ºC. In manual operation, the user can change it in

steps of 2ºC to 20ºC or 24ºC by pressing "

∨∨

" or "

∧∧

" button on the hand-held transmitter.

Conversely, this is not possible in automatic operation.

5.

Fan Mode


Only indoor fan and the vane operate in this mode.
The user can select the desired indoor fan speed and vane position, but auto fan speed
selection is not available.