Heiko JS035-C1, Service Manual

Page: 15 / 52

Dimensional drawings
13
Domestic air conditioner
7.Funcitions and control
7.1 Main functions and control specification
7.1.1 Automatic operation
When the running mode is turned to automation after starting the system, the system will first
determine the running mode according to the current room temperature and then will run according to
the determined mode. Tr in the following selection conditions means room temperature, Ts means
setting temperature, Tp means temperature of indoor coil pipe
Tr
≥
Ts-3
℃
Choose Cooling Mode
Tr
＜
Ts-3
℃
Choose Heating Mode
After turning to the automation mode, the running mode can be switched between cooling mode,
fan mode and heating mode according to the change of the indoor ambient temperature. But the
automatic conversion between cooling mode and heating mode must be conducted after 15 minutes.
7.1.2 Cooling operation mode
Temperature control range: 16
℃
---30
℃
Temperature difference: 1
℃
* Control features:
Pn=(Nh_c- S_c)*10
≥
30 the maximum frequency control @1
Pn=(Nh_c- S_c) *10
＜
30 PID control @2
@1 When the starting ability is not the maximum frequency(EE), its maximum frequency limitation is
calculated by the following equations:
The frequency limitation
＝
the maximum frequency(EE) * the rated frequency K of the indoor setting
airflow speed
Refrigeration mode:
The indoor setting
airflow speed
Low Medium
The percentage of the
rated frequency K
73% 85%
@2 PID control :
The innital frequency Sn is determined by Pn . We can calculate Hzoutf according to the value of
Kp ,Ki ,Kd, Out_gain,Pn.Then , Fn = Sn + Hzoutf. The value of Fn is calculated in each sample time
(60 seconds),and Fn is adujusted according to
previous frequency of Sn and filtered output of Hzoutf.
*Manus: When the system is operating, you can set the high, medium or low speed manually. (When
the sensor is on or off, the system will change the speed 2 seconds after receiving the signal.) When
the system is operating, you can also set the automatic speed which is switched the fan speed
according to the temperature range.
7.1.3 Dehumidifying mode.
* temperature control range: 16---30
℃
* temperature difference: 1
℃
* Control features:
Pn=(Nh_c- S_c)*10
≥
40 the maximum frequency control @1