AY-AP18 (serv.man7). Functions - Sharp Air Conditioner Service Manual (repair manual). Page 2

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2-2

DRY operation
On the switch on, the compressor always starts to
operate for 2 minutes with fan speed "DL" .
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.

2-3

Heat operation

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

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

Compressor

Cooling zone

Dehumidifying zone

Circulating zone

Fan speed

ON

"DH"

"DL"

"DL" or OFF

ON

OFF

Room temperature

Preset temperature

Room
temperature
transition

States 1 & 3 : Compressor ON
States 2  : Compressor OFF/(ON)
                  (Hot-keep function)

H1

H2

3

1

2

Fan speed
Fan speeds are given by the indoor fan motor, "DL"~"HH" which are available in the following operation mode.

Fan switch

DL

Fan speed

Fan switch (AUTO)

AY-AP18CS

(r.p.m.)

750

830

780

860

820

960

840

980

940

1030

1000

1120

1050

1210

720

730

840

930

870

960

940

1080

1010

1150

1050

1210

AY-AP24CS

DH

DRY

COOL

CL

COOL SOFT

CAL

CM

COOL LOW

CAH

CH

COOL HIGH

HUL

HL

HEAT SOFT

HEAT

HAL

HM

HEAT LOW

HAH

HH

HEAT HIGH