DC INVERTER U-MATCH AIR CONDITIONERS CONTROL
2 MAIN LOGIC
2.1 Cooling
After the cooling command is sent out, the indoor fan will run at high speed for 5 seconds before it is put
into operation according to the setting. Then, it is started to calculate the system load demand value. If
the load is 0, the other loads except the indoor fan will not be put into operation (The water pump will run
according to the pump control logic behind). If the load is >0, the EXV will be firstly opened to step X; then
the indoor fan is started. After 30 seconds, the compressor is started at initial frequency 40Hz and will be
maintained for 3 minutes. After that, the compressor, EXV and outdoor fan will adjust according to logic.
Compressor
Outdoor fan
Cooling mode
3 min.
Send out switch-off command
Acc. to
control logic
Acc. to
control logic
Capacity demand >0
480 steps
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