CHAPTER 3. FUNCTIONS
[1] FUNCTION
TEMPERATURE CONTROL
CHARACTERISTIC
1.1. COOL operation
2.2. DRY
On the switch on, the compressor always starts to operate for 2
minutes with fan speed "DL".
In the "COOL" mode, the thermostat circuit is controlled by five
thermostat lines (C1 thru C5).
The microcomputer reads the room temperature 2 minutes after
this first compressor operation.
This room temperature is set as the preset temperature
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.
18 32
Preset temperature (C )
1.2. DRY
In the "DRY" mode, the thermostat circuit is controlled by three
thermostat lines (D1 thru D3).
18 32
Preset tem
erature
C
Compressor Fan speed
Cooling zone (1) & (5) ON "DH"
Dehumidifying zone (2) & (4) ON "DL"
Circulating zone (3) OFF "DL" or OFF
18 32
Preset tem
erature
C
FAN SPEED
Fan speeds are given by the indoor fan motor, "DL"~"CH" which
are available in the following operation mode.
OPERATION MODES
2.1. COOL operation
NOTE: Fan speed may be changed, without warning.
Fan
speed
Fan switch Fan switch
(AUTO)
AH-129 / AH-MP14
(r.p.m)
The compressor turns on or off, at the thermostat lines C3 and
C4. The outdoor fan motor is also controlled with the compressor.
DL
—
DRY
800
DH
—
890
CL
COOL LOW — 800
CAL
—
COOL
840
CM
COOL MID
980
CAH
—
1020
CH
COOL HIGH — 1170
FREEZE PREVENTIVE
When the indoor pipe temperature falls below 3 C cool or dry
operation for 3 minutes or more, the compressor is turned off.
When the indoor pipe temperature rises above 7 C in cool or dry
operation for 3 minutes or more, the compressor is turned on.
18 32
Preset tem
erature
C
10
°°
°
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