Oil Return Control; Oil Return In Cooling Mode; Oil Return Control In Heating Mode; Special Control - LG Multi V5 Service Manual

Oil Return Control

Oil return operation recovers any oil that has accumulated in the piping and returns it to the compressor. Each component operates as shown
in the tables below during oil return.

Oil Return in Cooling Mode

Table 2: Outdoor Unit Oil Return Control in Cooling Mode.
Component
Inverter Compressor
Fan
Main EEV
Subcooling EEV
Four-Way Valve 1
Four-Way Valve 2
Table 3: Indoor Unit Oil Return Control in Cooling Mode.
Component
Fan
Thermo On Unit EEV
Thermo Off Unit EEV
Oil Return Signal
• Start: Oil Return Operation begins when the oil sensor continuously measures low oil levels.
• Oil Return Operation will run for three (3) minutes.
• Stop: Oil Return Operation will end if / when compressor protection control starts.

Oil Return Control in Heating Mode

Table 4: Outdoor Unit Oil Return Control in Heating Mode.
Component
Inverter Compressor
Fan
Main EEV
Subcooling EEV
Four-Way Valve 1
Four-Way Valve 2
Table 5: Indoor Unit Oil Return Control in Heating Mode.
Component
Fan
Thermo On Unit EEV
Thermo Off Unit EEV
• Start: Oil Return Operation begins when the oil sensor continuously measures low oil levels.
• Oil Return Operation will run for three (3) minutes.
• Stop: Oil Return Operation will end if / when compressor protection control starts.
Start
30Hz
Normal Control
Upper: Minimum Pulse
Lower: Maximum Pulse
Minimum Pulse
Off
Heat Pump: On
Heat Recovery: Off
Start
Normal Control
Normal Control
40 Pulse
Off
Start
30Hz
Normal Control
Upper: Minimum Pulse
Lower: Maximum Pulse
Minimum Pulse
On
Heat Pump: Off
Heat Recovery: Off
Start
Normal Control
Normal Control
80~130 Pulse
Due to our policy of continuous product innovation, some specifications may change without notification.
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SPECIAL CONTROL

During Oil Return Operation
Set Value
Normal Control
Upper: Minimum Pulse
Lower: Maximum Pulse
20 Pulse
Off
Off
During Oil Return Operation
Off
Normal control
400 Pulse
On
During Oil Return Operation
Set Value
Normal Control
Upper: Minimum Pulse
Lower: Maximum Pulse
20 Pulse
Off
Off
During Oil Return Operation
Off
400~800 Pulse
400~800 Pulse
Oil Return Control
Stop
30Hz
Normal Control
Upper: Normal Control
Lower: Normal Control
80 Pulse
Off
Off
Stop
Normal Control
Normal Control
40 Pulse
Off
Stop
40Hz
Normal Control
Upper: Normal Control
Lower: Normal Control
80 Pulse
On
Off
Stop
Normal Control
Normal Control
80~130 Pulse
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