Daikin RXYQ5-48MAY1 Service Manual page 73

Refrigerant Flow for Each Operation Mode
Heating Oil Return & Defrost Operation
"High temperature, high pressure gas"
"High temperature, high pressure liquid"
"Low temperature, low pressure"
62
Fan OFF
" ON "
Heat exchanger
Fan
EV:512pls
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat "ON"
Heat
exchanger
pipe
Gauge port
Stop valve(with service port on on-site piping side φ 7.9 flare connection)
Indoor unit operation
Fan OFF
" OFF "
Heat exchanger
Fan
EV:512pls
Filter Filter
Electronic expansion valve
Indoor unit
Filter
Solenoid
Fusible plug
valve
Filter
Filter
Solenoid
valve
Capillary
tube
4-way valve
Pressure regulating
valve
(check valve type)
Gauge port
Solenoid
valve
Filter
Si39-407
Fan OFF
" ON "
Heat exchanger
Fan
EV:512pls
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat "OFF"
Electronic
expansion valve
Filter
High pressure
sensor
High pressure
switch
Compressor
Refirgerant Circuit