Daewoo DSC-1245FL Service Manual page 7

Air Conditioner Service Manual
a. Indoor fan motor can operate by automatic, low, middle, or high airflow speed circularly.
b. Indoor fan motor automatic airflow speed control, it works as shown in Figure 1:
Hi
Mid
Lo
RT－ST 1°C 2°C 4°C
Figure 1 Cooling automatic airflow
When the temperature changing leads the fan speed variation, the switch can only be made orderly,
and in every grade of air flow speed should run 1 minute at least.
3. Dry mode
While select to this mode, the air conditioner operates for 3 minutes according to cooling mode firstly
(ST set at 7°C), and then takes the detected backflow air temperature minus 2°C as a new set
temperature (the lowest temperature: 5°C) and runs according to cooling mode, indoor fan operates at
low-speed, at this moment the setting operation of fan speed invalid but Swing adjustable.
4. Heating mode
On the Heating mode, the room temperature (RT) is compensated (CRT), a fter that, the room
temperature displayed on the LED is CRT=RT-3°C.
1) The control of the compressor
a. When ST－CRT≥1°C，the compressor is running.
b. When ST－CRT＜-1°C，the compressor stops.
c. When -1°C≤ST－CRT＜1°C, the compressor keeps its original state
2) Outdoor fan motor and the compressor run simultaneously (except for defrosting)
3) The control of indoor fan motor:
a. Indoor fan motor can operate by automatic, low, middle, or high airflow speed circularly.
b. Indoor fan motor automatic airflow speed control, it works as shown in Figure 2:
Hi
Mid
Lo
ST－CRT 1°C 2°C 4°C
Figure 2 Heat automatic airflow
When the temperature changing leads the fan speed variation, the switch can only be made orderly,
and every grade of air flow speed should run 1 minute at least.
4) Vane motor control: run as set state.
5) 4-way valve control:
a. Under heating mode, the four-way valve maintains well-connected status (including the
compressor stops on set condition, except for the defrosting process)
b. When the mode switches into the heating mode or A/C start-up, four-way valves will open 5
Seconds before the compressor starts; while the mode exits from the heating mode or A/C turn off,
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