Daikin RXYQ5-48MAY1 Service Manual page 80

Si39-407
Cooling Oil Return Operation
"High temperature, high pressure gas"
"High temperature, high pressure liquid"
"Low temperature, low pressure"
Refirgerant Circuit
Fan ON
" ON "
Heat exchanger
Fan
EV:Nomal
control
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat "ON"
Heat exchanger
Pressure regulating
valve
(check valve type)
Electronic
expansion
valve
Check
valve
Solenoid
valve
Check
valve
High pressure
switch
Stop valve(with service port on on-site piping side φ 7.9 flare connection)
Refrigerant Flow for Each Operation Mode
Indoor unit operation
" OFF "
Fan OFF
Heat exchanger
Fan
EV:200pls
Filter Filter
Electronic expansion valve
Indoor unit
Filter
pipe
Solenoid
Filter
valve
Check
valve
Solenoid
valve
Filter
Compressor
Low pressure
sensor
Gauge port
" ON "
Fan OFF
Heat exchanger
Fan
EV:200pls
Filter Filter
Electronic expansion valve
Indoor unit
Thermostat "OFF"
Check
valve
Capillary tube
Fusible plug
Electronic expansion valve
Filter
Filter
4-way valve
High pressure
sensor
High
pressure
Check Check
switch
valve valve
Compressor Compressor
High
pressure
switch
69