LG ATNH126ELFC Service Manual page 58

Installation
Auto addressing
Auto addressing work should be done for simultaneous operation.
Addressing work assigns address to each Indoor Unit.
When firstly installing product or replacing the Indoor Unit PCB.
AUUH488C/AUUH728C/AUUH1008C
Main PCB
JIG_SW
A
Fig.a Outdoor PCB diagram
1. JIG_SW Setting
Check the JIG_SW to the right, or not set the JIG_SW to
the right.( A )
2. ZONE SW1 Setting
Set the ZONE SW1 as below Table.a ( B )
S/W1 is not used.
1 means S/W up.
0 means S/W down.
58 Synchro Air Conditioner
LED01T
TEST_SW1
ZONE SW1
C
1 2 3 4
B
Table.a ZONE SW1 Setting
Indoor Unit No.
ZONE SW1
1(Single)
1 2 3 4
x 0 0 0
2(Duo)
1 2 3 4
x 1 0 0
3(Trio)
3 4
1 2
x
1 1 0
4(Quartet)
1 2 3 4
x
1 1 1
3. Auto Addressing Method
* Work procedure
1) Set JIG_SW and ZONE SW1 correctly.
2) Turn on main power.
3) Press the TEST_SW1 for about 3 seconds within 3minutes After
main power on.( C )
4) After step 3), the LED01T(green LED) rapidly flickers.
When Addressing work is done, green LED is off, else LED stops
flickering and lights continuously.
5) If you fail to perform the Addressing work,
repeat step 2),3).