9
AH-M098E
AU-M188E
MICROCOMPUTER CONTROL SYSTEM
1. Temperature control characteristic
1-1
Operation COOL
In the mode “COOL”, the thermostat circuit is
controlled by four thermostat lines (C1 ~ C4).
2. Operation modes
2-1
Operation COOL
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-2
Room temperature( C)
Preset temperature(˚C)
18
32
D1
D2
D3
17.5
18.5
19.5
31.5
32.5
33.5
2-2
Operation DRY
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
H-1.
Figure H-3
Room temperature(C˚)
Preset temperature(C˚)
Room
temperature
transition
C3
C4
States 1 & 3 : Compressor ON
State 2 : Compressor OFF
1
2
3
Room temperature( C)
Preset temperature(˚C)
18
32
C1
C2
C3
C4
17.5
18.5
19.5
20.5
31.5
32.5
33.5
34.5
Figure H-1
1-2
Operation DRY
In the mode “DRY”, the thermostat circuit is
controlled by three thermostat lines (D1 ~ D3).
