Daikin RXYQ-TA Series Service Manual page 42

Refrigerant Flow for Each Operation Mode
3.2.2 Cooling Oil Return Operation
High temperature, high pressure, gas
High temperature, high pressure, liquid
Low temperature, low pressure
Stop valve (With service port φ5/16 in. (7.9mm) flare connection)
29
Fan ON
Heat exchanger
Fan
EV: Normal
control
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat ON
Double tube
heat exchanger
Filter
Electronic
expansion valve
Fusible
plug
regulating valve
Accumulator
Capillary tube Charge port
SV
Filter Solenoid valve Filter
Indoor unit operation
Fan OFF
OFF
ON
Heat exchanger
Fan
EV: 224 pulses
Filter Filter
Electronic expansion valve
Indoor unit
Electronic
expansion valve
Heat sink
Pressure
S1NPL
Low pressure
sensor
Fan ON
ON
Heat exchanger
Fan
EV: Normal
control
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat OFF
Filter
Fan
M
Fan
M
Four way valve
High pressure
S1NPH
Check valve
Filter
High pressure
switch
Oil separator
S1PH
Filter
Compressor
Solenoid valve
M1C
Capillary tube
Refrigerant Circuit
SiUS341615E
Heat exchanger
sensor
C: 3D085598A