Daikin VRV RXYMQ-A Series Service Manual page 72

Special Control
7.2.2 Oil Return Control in Heating Operation
Part Name
Compressor motor
Fan motor
Electronic expansion valve
(Main)
Electronic expansion valve
(Injection)
Electronic expansion valve
(Refrigerant jacket)
Electronic expansion valve
(Refrigerant auto charge)
Four way valve
Ending conditions
Fan
Electronic expansion valve
66
Electric
RXYMQ-A
Symbol
M1C

M1F

Y1E

Y2E

Y3E

Y4E

Y1S

Indoor unit actuator
Thermostat ON unit
Stopping unit
Thermostat OFF unit
Thermostat ON unit
Stopping unit
Thermostat OFF unit
Function
RXYMQ4AVMK: 70 rps
RXYMQ4-6AYFK: 79 rps
With high pressure
OFF ←→ Step 4 ←→ Step 6
480 pulses
0 pulse
480 pulse
(0-480 pulse, when radiation fin temperature
increases)
480 pulse
OFF
• A lapse of 6 min.
OR
• Ts–Te < 3°C
Heating oil return control
OFF
OFF
OFF
Oil return EV opening degree
Oil return EV opening degree
Oil return EV opening degree
Part 4 Functions and Control
SiME332106E