LG multi v Installation Manual page 76

HR UNIT PCB
76
Flow chart of manual addressing for pipe detection
Execute in case of Auto pipe detection
failure
Turn No.1 of SW02M of HR unit PCB on.
Reset the power of HR unit PCB.
Enter the central control address into
each indoor unit using its wired remote
control.
On the HR unit PCB, manually set address
of each valve of the HR unit to the central
control address of the indoor unit
connected to the valve.
Reset the power of outdoor unit PCB.
Wait for about 5 minutes.
The number of the indoor units installed is
displayed.
Ex)HR ⇒ The number of the indoor
Are the number
of indoor units connected to the
outdoor unit and displayed one
equal?
YES
Completion of manual pipe detection
NO
Check the central control address of
indoor and HR unit.
Make sure that reset the outdoor
unit power when changing the
central control unit