LG multi V ARUB160BT3 Instruction Manual page 55

Vacuum Mode
This function is used for creating vacuum in the system after compressor replacement, ODU parts replace-
ment or IDU addition/replacement.
Vacuum mode setting method
ODU power reset
Master unit PCB DIP switch on
Switch on : 10, 12, 13
Press the black button Main PCB (5 sec.)
Vacuum mode setting
ODU valve open,
Main EEV, SC EEV open
IDU EEV open
HR unit valve open, SC EEV open
CAUTION
ODU operation stops during vacuum mode. Compressor can't operate.
Refrigerant piping system
Vacuum mode cancellation method
Master unit PCB DIP switch off
Switch off : 10, 12, 13
Power reset
Vacuum mode cancellation
Installation Manual 55