Daikin RXQ12AHR Service Manual page 56

Refrigerant Flow for Each Operation Mode
Cooling Oil Return Operation
High temperature, high pressure, gas
High temperature, high pressure, liquid
Low temperature, low pressure
Refrigerant
Auto charge
port
50
F a n O N
ON
Heat exchanger
Fan
EV: Normal
control
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat ON
Stop valve (With service port on on-site piping side φ7.9mm flare connection)
Double tube
Heat exchanger
R6T
R5T
Electronic expansion
valve
(Y2E)
Pressure
regulating
Electronic expansion
valve
(Y4E)
Filter
R3T
Filter
Indoor unit operation
F a n O F F
O F F
Heat exchanger
Fan
EV: 224 pulse
Filter Filter
Electronic expansion valve
Indoor unit
Check valve
ONLY FOR
Filter
RXQ14ARY1
M1F
Heat sink PCB
M2F
ONLY FOR
RXQ14ARY1
valve
(S1PH)
High pressure
switch
HPS
R21T
(S1NPL) Compressor
R8T
Low pressure
INV
sensor
M1C
Capillary tube
SiAF341904E
F a n O N
O N
Heat exchanger
Fan
EV: Normal
control
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat OFF
R4T
FAN
R1T
M
Heat exchanger
FAN
M
(S1NPH)
High pressure
SENPH
sensor
Check valve
Filter
Filter
Solenoid valve (Y3S)
C: 3D112173B
Part 2 Refrigerant Circuit