Refrigerant Flow for Each Operation Mode
SiAF341904E
52
Part 2 Refrigerant Circuit
Cooling Oil Return Operation
OFF
ON
ON
EV: 224 pulse
Fan
Fan
Indoor unit operation
Thermostat OFF
Indoor unit
Filter
Filter
Heat exchanger
Indoor unit
Filter
Filter
Heat exchanger
Fan ON
Fan OFF
Fan ON
Thermostat ON
Indoor unit
Heat exchanger
Electronic expansion valve
Filter
Filter
Fan
Electronic expansion valve
Electronic expansion valve
High temperature, high pressure, gas
High temperature, high pressure, liquid
Low temperature, low pressure
EV: Normal
control
EV: Normal
control
Double tube
Heat Exchanger
R5T
Low pressure
sensor
(S1NPL)
R3T
Pressure
Regulating
Valve
Electronic
Expansion
Valve
(Y2E)
Heat sink PCB
R6T
R4T
R1T
FAN
FAN
M
M1F
M
M2F
Heat Exchanger
SENPH
(S1NPH)
High pressure
sensor
Check Valve
Filter
(S1PH)
High pressure
switch
HPS
R21T
Compressor
INV1
M1C
sv
sv
Compressor
INV2
HPS
Solenoid
valve
(Y3S)
Capillary
tube
Capillary
tube
Solenoid
valve
(Y4S)
Filter
Filter
Check Valve
M2C
R9T
R22T
(S2PH)
High pressure
switch
Filter
(Y4E)
Electronic Expansion
Valve
Refrigerant
Auto charge
port
R8T
SENPL
Filter
Filter
Stop valve (With service port on on-site piping side
φ
7.9mm flare connection)
Filter
Oil
Separator
Separator
Oil
C: 3D112176