LG ARUV Series Service Manual page 185

4.1.3 Oil Return/Defrost Operation
IM FAN
INV : Inverter compressor
EEV : Linear Expansion Valve
O/S : Oil Separator
Accum. : Accumulator
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Only for training and service purposes
Heat Exchanger
EEV
Filter
Fan
Filter
lndoor unit
H/G
O/S
INV
Accum.
Liquid Injection
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:High temperature / High pressure gas
:High temperature / High pressure liquid
:Low temperature / Low pressure gas
Heat Exchanger
Fan
Gas pipe
Liquid pipe
S
Piping Diagrams
EEV
Filter
Filter
lndoor unit
Pressure sensor
Pressure switch
Check valve
EEV
Thermistor
Solenoid valve
Service valve
Strainer
LGE Internal Use Only