Oil Return Operation - Daikin R410As Service Manual

Si39-302
3.2

Oil Return Operation

3.2.1 Oil Return Operation in Cooling Operation
Outdoor unit actuator
Compressor
Outdoor unit fan
Four way valve
Main motorized valve (EV1)
∗Value in ( ) are for RXYQ5M only.
Subcooling motorized valve (EV2)
Hot gas bypass valve (SVP)
Oil equalization valve (SVO)
Receiver gas charging valve (SVL)
Receiver gas discharging valve
(SVG)
Non-operating unit gas discharging
valve (SVSG)
Non-operating unit liquid pipe stop
valve (SVSL)
Ending conditions
* 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 RXYQ16M.
Fan
Electronic expansion valve
Function
Oil return preparation
operation
Upper limit control
Fan control
OFF
0 pls (1400pls)
SH control
OFF
ON
OFF
OFF
OFF
ON
2 min.
Indoor unit actuator
Thermostat ON unit
Stopping unit
Thermostat OFF unit
Thermostat ON unit
Stopping unit
Thermostat OFF unit

Oil return operation

124 Hz + ON + OFF
Fan control
OFF
0 pls (1400pls)
0 pls
ON
ON
OFF
OFF
OFF
ON
• 6 min.
or
• Ts - Te<5
Cooling oil return operation
Set Air Volume
Normal opening
Special Control
Post-oil-return operation
52 Hz + OFF + OFF
Fan control
OFF
0 pls (1400pls)
0 pls
ON
ON
OFF
OFF
OFF
ON
10 sec.
OFF
OFF
200 pls
200 pls
75