Daikin RXQ12AHR Service Manual page 58

Refrigerant Flow for Each Operation Mode
Cooling Oil Return Operation
High temperature, high pressure, gas
High temperature, high pressure, liquid
Low temperature, low pressure
Stop valve (With service port on on-site piping side φ7.9mm flare connection)
Electronic Expansion
Valve
Refrigerant (Y4E)
Auto charge
port
Filter
52
Fan ON
ON
Heat exchanger
Fan
EV: Normal
control
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat ON
Double tube
Heat Exchanger
R6T
R5T
Electronic
Expansion
Valve
(Y2E)
Pressure
Regulating
Valve
R3T
Filter
Indoor unit operation
Fan OFF
OFF
Heat exchanger
Fan
EV: 224 pulse
Filter Filter
Electronic expansion valve
Indoor unit
Filter
Heat sink PCB
(S2PH)
High pressure
switch
HPS
R22T
Compressor
R9T
(S1NPL)
INV2
Low pressure
M2C
sensor
SiAF341904E
Fan ON
ON
Heat exchanger
Fan
EV: Normal
control
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat OFF
R4T
FAN
R1T
M1F
M
Heat Exchanger
FAN
M2F
M
(S1NPH)
High pressure
SENPH
sensor
Check Valve Check Valve
Filter
Filter
Filter
Filter
Solenoid
Solenoid
Compressor
valve
valve
(Y3S)
(Y4S)
Capillary
tube
Capillary
tube
Part 2 Refrigerant Circuit
(S1PH)
High pressure
switch
HPS
R21T
R8T
INV1
M1C
C: 3D112176