Principal Of Operation - Gree GMV-160WL/A-T Service Manual

6 Principal of Operation

Components in flowcharts are presented according to the following table:
Name Compressor
Symbol
Gas-liquid
Name
separator
Symbol
In cooling, the low-temperature and low-pressure refrigerant gas from each indoor heat exchanger
will be merged and inhaled by the compressor and then become high-temperature and high-pressure
gas, which will later be discharged into outdoor heat exchangers. By exchanging heat with outdoor air,
refrigerant will turn to liquid and flow to each indoor unit via Y-type branch or manifold. Pressure and
temperature of the refrigerant will then be lowered by throttle elements before it flows into indoor heat
exchangers. After exchanging heat with indoor air, refrigerant wil become low-temperature and
low-pressure gas again and repeat the circulation so as to realize the cooling effect. In heating, 4-way
valve will be energized to make refrigerant circulate in a reverse direction of cooling. Refrigerant will
release heat in indoor heat exchangers (electric heating elements will also work under certain
circumstance and release heat) and absorb heat in outdoor heat exchangers circularly so as to realize
the heating effect.
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4-way valve Cut-off valve
Pressure Pressure
switch sensor
One-way valve
Axial-flow finned heat
exchanger
6
Capillary tube
Electronic expansion
valve