Daikin VRV II RXYQ5MATL, Service Manual, Page: 90 / 331

Si39-504 Special Control
Function 79
3.2.2 Oil Return Operation in Heating Operation
* In the case of multi-outdoor-unit system,
Master unit: Performs the operations listed in the table above.
Slave units: Operating units perform the operations listed in the table above.
Non-operating units perform the operations listed in the table above from the oil return operation.
(Non-operating unit stops during “oil return preparation operation”.)
* Actuators are based on RXYQ16MA.
Outdoor Unit Actuator
Oil return preparation
operation
Oil return operation Post-oil-return operation
Compressor Upper limit control 124 Hz + ON + OFF
1-step increase from
(74 Hz + OFF + OFF) to
(Pc - Pe>0.4 MPa) time
Outdoor unit fan
STEP7
or
STEP8
OFF STEP8
Four way valve ON OFF ON
Main motorized valve (EV1) SH control 2000 pls 180 pls
Subcooling motorized valve (EV2) 0 pls 0 pls 0 pls
Hot gas bypass valve (SVP) OFF ON ON
Receiver gas discharging valve
(SVG)
OFF OFF OFF
Non-operating unit liquid pipe stop
valve (SVSL)
ON ON ON
Ending conditions 130 sec.
•
6 min.
•
Ts - Te<5
°
C
•
160 sec.
•
Pc - Pe>0.4MPa
or or
Indoor unit actuator Heating oil return operation
Fan
Thermostat ON unit OFF
Stopping unit OFF
Thermostat OFF unit OFF
Electronic expansion valve
Thermostat ON unit 512 pls
Stopping unit 512 pls
Thermostat OFF unit 512 pls