Specifications

Special Control SiUS39-601
42 Function
3.2.2 Oil Return Operation in Heating Operation
<In condition of oil return operation>
Compressor cumulative operation time > 8 hours
(However, 2 hours after turning power on first time.)
Outdoor Unit Actuator
Oil return preparation
operation
Oil return operation Post-oil-return operation
Compressor Upper limit control 124 Hz + ON
1-step increase from
(74 Hz + OFF) to
(Pc - Pe>58 psi) time
Outdoor unit fan
STEP8
or
STEP9
OFF STEP9
Four way valve ON OFF ON
Main motorized valve (EV1) SH control 0 pls 180 pls
Subcooling motorized valve (EV2) 0 pls 0 pls 0 pls
Hot gas bypass valve (SVP) OFF ON ON
Oil equalization valve (SVO) ON ON ON
Receiver gas charging valve (SVL) OFF OFF OFF
Receiver gas discharging valve (SVG) OFF OFF OFF
Non-operating unit gas discharging
valve (SVSG)
OFF OFF OFF
Non-operating unit liquid pipe stop
valve (SVSL)
ON ON ON
Ending conditions 2 min.
•
6 min.
•
Ts - Te<9
•
160 sec.
•
Pc - Pe>58 psi
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