LG Multi V ARUN***LM3 Series Installation Manual page 34

Pipe connections between indoor and outdoor unit
Vacuum Mode
This function is used for creating vacuum in the system after compressor replacement, ODU parts
replacement or IDU addition/replacement.
Vacuum mode setting method
Outdoor unit PCB DIP switch ON
- DIP switch No. : 10, 12, 13
Press the black button Main PCB (5 sec.)
Vacuum mode setting
Main EEV, SC EEV OPEN
CAUTION
ODU operation stops during vacuum mode. Compressor can't operate.
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Solo
ODU power reset
ODU V/V OPEN
IDU EEV OPEN
Outdoor Unit
- Heat Pump
Vacuum mode cancellation method
Outdoor unit PCB DIP switch OFF
- DIP switch No. : 10, 12, 13
Power reset
Vacuum mode cancellation