LG multi V JRUN 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
ODU V/V OPEN
Main EEV, SC EEV OPEN
IDU EEV OPEN
CAUTION
ODU operation stops during vacuum mode. Compressor can't operate.
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