LG R410A - Page 94

94 Outdoor Unit
2.1.2 Oil return control on heating mode
■ High pressure limit
■ Low pressure limit
■ Oil return operation time : 4 min for running step
■ Starting condition:same as cooling mode
Fan
Main LEV
4way valve
Subcooling LEV
0Hz
Full open
On → off
min.
StartingComponent
Sub unit
compressor
All off
Hot gas bypass
valve
On
High pressure
control
Full open
Off
min.
Running
On
On
High pressure
control
Base pulse
On
min.
Ending
Off
On
Fan Off
StartingIndoor unit
Thermo on unit
LEV
Oil return
pulse
Off
Running
Oil return operation
pulse
Off
Ending
Return to
base pulse
Thermo off unit
LEV
Heating close pulse
Oil return operation
pulse
Heating close pulse
Inv
Compressor
Normal
Pressure
limit
37Hz + 37Hz 90Hz + 90Hz 20Hz + 20Hz
30Hz + 30Hz 80Hz + 80Hz 20Hz + 20Hz
Pressure range
Low pressure ≤ 229 kpa
Low pressure ≥ 242 kpa
Compressor combination
Refer to combination table
Normal
Pressure range
Low pressure ≤ 3189 kpa
Low pressure ≥ 3189 kpa
Compressor combination
Refer to combination table
Normal
Function