AUKS AFC-1000CF/4, Technical Manual

Page: 44 / 60

Service Manual
44
1. Electrical system main components
Appellation Figuration and inner configuration Instruction
PCB
Function:
Via program to control the relay, make
every components on/off according to
temperature and pressure variety, so to
realize automatic control
Capacitor
Induce the single-phase motor produce
gyre magnetic field,
connect with
the accessory winding, and participate
in the operation.
2. Main functions of the unit
2.1 Automatic operation
When AUTO mode is selected on the remote control, the air conditioner will automatically select
between cooling, dehumidifying and heating modes based on indoor temperature and then operate under
the selected mode;
1.If TA≥27
℃ , the cooling mode will be activated with the air conditioner operating at set airflow and set
temperature of 24 ℃ under cooling mode;
2.20
℃
< TA < 27
℃
, the dehumidifying mode will be activated with the air conditioner operating at set
airflow and set temperature of 24
℃
under dehumidifying mode;
3.If TA≤20
℃
, the heating mode will be activated with the air conditioner operating at set airflow and set
temperature of 24 ℃ under heating mode (a cool-only unit will operate under feeding mode);
4.There are timing, sleeping, power fail memory, temperature sensing (reserved) functions under this
mode;
5.The mode , once selected, will not change as the indoor temperature varies, however, by turning off and
then on the unit or switching the mode, the operation mode can be reselected.
2.2 Cooling operation
The temperature setting is determined by the remote control with temperature controlled in the range
of 16 ℃ - 32 ℃ .The temperature setting can be adjusted using the “TEMP” and
“TEMPERATURE-” buttons. Depressing “Speed Selection” button allows selecting between “AUTO”,
“High Speed”, “Middle Speed” and “Low Speed” modes. Under this mode, the heating electrical valve will
be always closed, with other actions as follows:
1.When TA - TS≥1
℃ , the cooling valve will open and the indoor fan will operate at set speed;
2.When TA = TS, the previous status will remain;
3.When TA - TS≤-1
℃
, the cooling valve will close and the indoor fan will operate at low speed;
4.When TA - TS≤-2
℃
,the indoor fan will close.
The low speed operation of the indoor fan will be activated 40 seconds after 5 minutes, if TA - TS≤-2
℃
the indoor fan will remain stopped for 5minutes before reactivate low speed operation for 40 seconds;
otherwise, the related cooling operation will be controlled according to indoor temperature
（ TA ） and set
temperature
（
TS
）
.
5.Automatic air speed control:
When TA - TS≥1
℃
, the cooling electric valve will open and the fan will operate at high speed;
When TA = TS, the indoor fan will operate at middle speed;
When TA - TS≤-1
℃
, the cooling electric valve will open and the fan will operate at low speed;