LG MULTI V Installation Manual page 52

Pipe connections between indoor and outdoor unit
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
Master unit PCB DIP switch on
- Heat pump : switch on 11, 14
- Cooling only : switch on 11, 14
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.
52 Outdoor Unit
ODU power reset
ODU V/V OPEN
IDU EEV OPEN
Warning : Please reset Main PCB before starting this function
DIP Switch Settings
Vacuum mode cancellation method
Master unit PCB DIP switch off
- Heat pump : switch off 11, 14
- Cooling only : switch off 11, 14
Power reset
Vacuum mode cancellation