Sinclair ASGE-18AI - 2.3 Heating Mode

DC INVERTER U-MATCH AIR CONDITIONERS CONTROL
2.3 Heating Mode
When the heating command is sent out, it is started to calculate the system load demand value. If the
load is 0, all the loads will not be put into operation. If the load is >0, the EXV will be firstly opened to step
Y; then the outdoor fan is started. After 30 seconds, the compressor will increase its frequency to the
required initial frequency 40Hz before it started. It is started to count the time when the compressor
frequency is increased to 20Hz. After 10 seconds, the 4-way valve is energized and then the indoor fan
will run as per cold air prevention mode. The compressor will keep running at initial frequency for 3
minutes. After that, the compressor, EXV and outdoor fan will adjust according to logic.
Compressor
Outdoor fan
Indoor fan
(cooling)
4-way valve
480 steps
6
0
sec.
150 sec.
30 sec.
3 min.
3sec.
Send out switch-off command
Acc. to
control logic
Acc. to
control logic
120 sec.
X
steps
10 sec.
150s after the compresso
r
is stopped
Firstly switch off to step 0
and then switch off step 60.
Run as per cold
air prevention
mode
Blow residual
heats
Capacity demand >0
Send out Heating
command
Heating Mode