LG R410A Service Manual page 94

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