8-6. Cold Draft Prevention (Heating)
This function controls indoor fan speed so a strong draft of cold air will not blow out before the indoor heat
exchange coil have sufficiently warmed up.
Indoor fan speed varies according to the indoor heat exchange coil temperature as table shown below.
Condition
Compressor is in operation
(Indoor coil temp. goes up)
Compressor is stopped
(Indoor coil temp. goes down)
Indoor coil temperature ( C)
below 25 C
between 25 to 30 C
between 30 to 36 C
between 20 to 36
C
over 36
C
below 20 C
Indoor fan speed
OFF
LL (Very low)
Low
Set speed *1
UL (Ultra low)
OFF *2
NOTE
When the coil temperature rises above 36 C, indoor fan operates in set speed.
If 10 minutes has elapsed after the compressor has been stopped, the indoor fan stops its operation regardless
of the indoor heat exchange coil temperature.
*1
*2
Compressor
Set Speed
Low
LL
UL
OFF
Set Speed
Low
LL
UL
OFF
Indoor fan
36 C
30
C
25
C
Indoor heat
exch. coil
temp.
Compressor : ON
when the coil
temp. goes up
20
C
Compressor : OFF
when the coil
temp. goes down
OFFOFF
ON
50
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