Sharp AE-A7FHR, Service Manual

Page: 9 / 36

AYAP7FHR
3 – 1
AYAP7FHR Service Manual
CHAPTER 3.
FUNCTIONS
[1] FUNCTION
1. TEMPERATURE CONTROL CHARACTERISTIC
1.1. COOL operation
In the "COOL" mode, the thermostat circuit is controlled by four ther-
mostat lines (C1 thru C5).
1.2. DRY operation
In the "DRY" mode, the thermostat circuit is controlled by three ther-
mostat lines (D1 thru D3).
1.3. HEAT operation
In the "HEAT" mode, the thermostat circuit is controlled by six thermo-
stat lines (H01 thru H4).
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.
2.2. DRY operation
On the switch on, the compressor always starts to operate for 2 min-
utes 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 automati-
cally.The preset temperature ranges from 18digC 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 tem-
perature 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.
18
32
C1
C2
C3
C4
17.5
18.5
19.5
19.0
20.5
31.5
33.0
32.5
33.5
34.5
Preset temperature (°C)
Room
temperature
(°C)
C5
Room
temperature(°C)
Preset temperature (°C)
18
32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
Preset temperature (°C)
H4
H3
H2
H1
H02
H01
17.5
18.5
20
21
22
23
31.5
32.5
34.0
35.0
36.0
37.0
18 32
Room
temperature(°C)
Compressor Fan speed
Cooling zone ON DH
Dehumidifying zone ON DL
Circulating zone OFF DL or OFF
Room
temperature
Preset temperature
Room
temperature
transition
C4
C5
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
1
2
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