LG multi V ARUN Series Installation Manual page 51

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
ODU power reset
Master unit PCB DIP switch on
- Heat pump : switch on 11,14
- Cooling only : switch on 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.
ODU V/V OPEN
IDU EEV OPEN
Pipe connections between indoor and outdoor unit
Vacuum mode cancellation method
Master unit PCB DIP switch off
- Heat pump : switch off 11,14
- Cooling only : switch off 10,12,13
Power reset
Vacuum mode cancellation
Installation Manual 51