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Sharp AY-A079E Service Manual page 10

Split system room air conditioners
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AY/AE-A079E
AY/AE-A099E
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.
States 1 & 5 : Cooling zone
States 2 & 4 : Dehumidifying zone
States 3 : Circulating zone
Preset temperature
Figure Y-5
Cooling zone
Dehumidifying
zone
Circulating
zone
D1
D2
5
D3
1
4
2
Room
temperature
transition
3
Table Y-1
Compressor
Fan Speed
ON
"UL"
ON
"D"
OFF
"D" or OFF
2-3
Heat operation
The compressor turns on or off, at State 2 , turns
on continuously at State 1 & 3 .
States 1 & 3 : Compressor ON
States 2 : Compressor OFF/(ON)
Preset temperature
2-4
Fan only operation
The indoor fan motor always turns on.
3. Fan speed
Fan speeds are given by the indoor fan motor, "H",
"M", "L", "UL" and "D" which are available in the
following operation mode.
FAN Switch
HEAT
HIGH
H
LOW
M
SOFT
10
(Hot-keep function)
H1
H2
2
Room
temperature
3
transition
1
Figure Y-6
Table Y-2
COOL
FAN ONLY
M
L
L
UL
M
L
UL

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