Read Sharp AU-A18 (serv.man12) Service Manual online
AH-AP18CS
AH-AP24CS
AU-A18CS
AU-A24CS
AH-AP24CS
AU-A18CS
AU-A24CS
12
FUNCTIONS
1. Temperature control characteristic
1-1
COOL operation
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C5).
In the “COOL” mode, the thermostat circuit is
controlled by four thermostat lines (C1 thru C5).
2. Operation modes
2-1
COOL operation
The compressor turns on or off, at the
thermostat lines C3 and C4. The outdoor fan
motor is also controlled with the compressor.
The compressor turns on or off, at the
thermostat lines C3 and C4. The outdoor fan
motor is also controlled with the compressor.
Figure H-1
1-2
DRY operation
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
In the “DRY” mode, the thermostat circuit is
controlled by three thermostat lines (D1 thru
D3).
Figure H-3
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
H-1.
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
H-1.
Figure H-2
Figure H-4
Room temperature(˚C)
Preset temperature (˚C)
18
32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Room temperature
Preset temperature
Room
temperature
transition
temperature
transition
C4
C5
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
State 2 : Compressor OFF
1
2
3
Room temperature
Preset temperature
Room
temperature
transition
temperature
transition
D3
D2
D1
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
3
4
5
1
2
18
32
C1
C2
C4
C3
C5
17.5
18.5
19.0
19.5
20.5
31.5
32.5
33.5
34.5
Preset temperature (˚C)
Room temperature (˚C)
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