AY-A244 - Sharp Air Conditioner Specification (repair manual). Page 12

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2-3

Heat operation
The compressor turns off, at State  2  , turns on
continuously at State  1  &  3 .

2-4

Fan only operation
The indoor fan motor always turns on.

Fan speeds are given by the indoor fan motor, “M”,
“L” and “UL”, which are available in the following
operation mode.

FAN Switch

HEAT

COOL      FAN ONLY

    HIGH

M

M

        M

    LOW

L

L

         L

    SOFT

UL

UL

       UL

Compressor

Fan Speed

Cooling zone

ON

“UL”

Dehumidifying

ON

“D”

zone

Circulating

OFF

“D” or OFF

zone

2-2

DRY operation
 On the switch on, the compressor always starts to
operate for 2 minutes with fan speed “D” (slower
than “UL”).
The microcomputer reads the room temperature 2
minutes after this first compressor operation.
This room temperature is set as the preset
temperature automatically.
The preset temperature ranges from 18˚C to 32˚C.
When the room temperature is below 18˚C, the
preset temperature is  set to 18˚C, and when the
room temperature is over 32˚C, the preset
temperature is set to 32˚C.
Dry operation is divided into three zones (Cooling
zone, Dehumidifying zone and Circulating zone)
by thermostat lines (D1 to D3), and the compressor
and the fan motor are controlled in each zone as
shown in Table Y-1.

Room temperature

Preset temperature

Room 
temperature 
transition

D3

D2

D1

States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone

3

4

5

1

2

Room temperature

Preset temperature

Room temperature transition 

H2

H1

States 1 & 3 : Compressor ON
State 2 : Compressor OFF

3

1

2